# EPIC Online Technology Meeting on Mini/Micro LED - Join 25 March https://www.youtube.com/watch?v=Xsup4U4s2Bk [00:00] [Music] [00:09] [Applause] [00:13] what an amazing day today today we are [00:15] bringing together the whole world of [00:17] micro led technology [00:19] we are actually working together with [00:21] epic [00:22] pida and isa to bring together the [00:26] entire supply chain of mini and micro [00:29] leds [00:30] to make sure that we start new [00:32] cooperations i would like to [00:34] thank so much the amazing work of pida [00:37] and isa that have done for making this [00:40] meeting come true [00:41] we had people [00:44] registered for this meeting more than [00:47] 200 [00:48] companies we did an exercise we loved it [00:51] what we did is for every company that [00:53] registered today at least as of last [00:55] night in europe [00:57] we studied what they do and we built [01:00] this [01:00] supply chain we have selected who [01:03] which companies play the role of end [01:05] user [01:06] which companies are making this place [01:09] which companies are making the [01:10] equipment for the manufacturing of micro [01:12] led assemblies [01:14] which companies are making micro optics [01:16] laser technologies leds [01:17] which companies can do the semiconductor [01:19] production which can provide the [01:21] materials for the semiconductor [01:23] production [01:24] we are all math here and the reason that [01:27] we do this meeting [01:28] is that for the next three hours we want [01:31] you to do [01:32] business we want you to connect with the [01:34] right [01:35] companies we have this fantastic agenda [01:38] with companies from all over the world [01:40] which all of them [01:41] have a success story to share with you [01:45] i am the co-moderator of this fantastic [01:47] event [01:48] i am the cto chief technology [01:51] of server of epic and i also have the [01:55] pleasure to co-chair this meeting with [01:58] professor jan okay i'll turn to [02:01] chinese to present my speech [02:04] so today i will talk about [02:08] from the end customer's point of view [02:11] the development [02:13] process of macro and mini led [02:16] next slide please [02:23] yeah so for my speech i will cover the [02:25] following three aspects [02:26] first about the development of mini led [02:30] and the second in the process for the [02:34] key issues [02:34] what are the key technologies we have [02:36] and the third [02:38] in the mini and the micro led what are [02:41] our products [02:42] first of all i want to cover the first [02:45] part [02:48] from the end customer's point of view i [02:51] want to show you [02:52] in the future how will be the future [02:55] display like [02:56] we define as sex u [03:00] in terms of the display's point of view [03:03] as for the ultimate display there will [03:06] be six [03:06] use first of all unlimited size [03:10] and then unlimited ratio and then [03:13] unlimited form of products [03:15] and number four unlimited border of [03:18] products [03:19] and number five unlimited resolution [03:22] and finally unlimited interaction [03:26] between people [03:26] and machines so [03:30] we believe that the sex use will be the [03:32] future trend [03:34] of display in the future and we will [03:38] move acro move towards the 6u in the [03:40] future next slide [03:43] yeah so here you could see that [03:48] the market [03:51] here you could see that the market [03:51] opportunities of mini led [03:53] actually the mini led market has two [03:56] parts [03:56] one is the backlight mini led blu [04:00] and the second mini led direct display [04:03] for the backlight we covered tv monitor [04:07] tablets mobiles [04:11] so we could see the ble cover [04:14] the whole sizes direct display covers [04:18] two important parts one is pid the [04:20] commercial market [04:21] and the second the automotive market [04:25] so for the market opportunities we [04:27] believe there are a lot of market [04:30] for many led blue and mini led direct [04:33] display [04:35] and now let's turn to the market trend [04:39] we have seen three market segments the [04:42] first is [04:43] mini led backlight tv second monitor [04:47] and a third which is the glide and b [04:49] market [04:51] in these three market segments in terms [04:54] of the [04:54] mini led backlight it is growing [04:58] quite rapidly every year [05:01] and growth rate is very high [05:04] in 2025 there will be over 30 million [05:07] units [05:08] sold so the market will be huge [05:13] and then let's turn to the direct [05:16] display [05:17] of small pitch [05:22] here i have listed the market below [05:24] 2.5.25 [05:26] different colors represent different [05:28] segments we focus [05:29] on below p1.1 [05:33] for market of blop 1.1 [05:36] the market rate the growth rate is the [05:39] highest over 50 percent in china [05:41] so this shows that in the future we will [05:44] grow [05:45] towards below p 1.1 or even lower [05:48] and now we cover from 0.6 to 0.9 as the [05:52] main market [05:53] if we go below 0.6 then this market [05:56] will turn from mini to micro so for the [06:00] direct display [06:01] we have some existing market in [06:04] many and we will go towards micro as for [06:08] the [06:09] end customers i believe that there will [06:12] not be [06:13] clear separation between meaning and a [06:16] micro [06:16] instead there will be the minimization [06:19] of micro led [06:23] so the direct display market is [06:26] huge but i want to draw your attention [06:28] that [06:31] if we don't consider [06:35] the changes only look at the existing [06:38] market [06:39] then this is the market [06:42] of just two billion usd but if we don't [06:45] move into the consumer electronics [06:48] the market is not that big so we will [06:51] develop not just in the commercial [06:53] market but expand [06:54] in the commercial market but we will [06:56] also go towards the consumer electronics [06:59] to see whether we could reduce the cost [07:01] and find opportunities [07:02] we hope to make breakthroughs in these [07:04] two parts [07:08] yeah and next i will turn to the overall [07:10] industrial chain [07:13] actually in 2020 in this whole year [07:17] the market of mini and a micro led is [07:20] active not just for high-end customers [07:23] like [07:23] apple which is promoting the monitors [07:26] and other related products also for [07:30] tablets or upper stream chip [07:34] producers they all work with each other [07:37] in different forms so to accelerate the [07:40] development of mini [07:41] and micro markets that is a very clear [07:44] trend [07:45] next slide [07:50] yeah and now let's see that for the [07:53] development of mini and [07:54] micro there will be two [07:58] big trends now the mainstream market is [08:01] mini led and for the future mainstream [08:03] market [08:04] there will be plg pob [08:08] package on glass and packaging on [08:12] pcd flat so these two trends [08:16] will move towards clg and cob [08:20] and such a change will [08:23] change our resolution and [08:27] precision if we look at our pcb [08:30] then that is pwm driving for the [08:33] mini chip high resolution we cannot do [08:36] that [08:37] for the large system small chips low [08:40] risk [08:41] low brightness pcb will be restricted [08:44] so we believe that for the future cost [08:47] and driving [08:50] they will move towards cog that is the [08:54] end for us but during the process there [08:58] might be pog [08:59] and pob solutions because we want to [09:02] solve [09:03] the fast commercialization and also [09:06] solve [09:07] the issues which couldn't be solved [09:09] through that mass transfer [09:11] we hope through the existing plan we [09:13] could commercialize our products [09:15] so that is like the mid plan [09:20] next slide [09:24] yeah based on the overall understanding [09:26] and the analysis of the market we could [09:29] see that [09:30] if we want to solve the mini and the [09:32] micro technique called [09:34] commercialization we need to make [09:36] breakthrough in the following four [09:37] perspectives [09:38] and there are challenges in these four [09:40] areas one is [09:42] in the chips and we need to [09:46] develop the zero three zero five zero [09:50] six chips [09:51] and also a part from the market if we [09:54] want to go further we need to consider [09:56] two parts [09:57] one is the [10:00] minimization of chips we want to make it [10:03] micro [10:06] also we need to consider how big the [10:08] overall volume is [10:09] and the second if the chips are smaller [10:12] enough [10:13] then what about the yield rate what [10:15] about the overall efficiency could we [10:18] enhance the overall efficiency to meet [10:20] the amounts [10:21] these are the two areas we need to solve [10:24] if we cannot solve these two [10:26] and if we find a middle process then we [10:29] could find [10:30] like zero in one or two in one which [10:32] consider both the cost and efficiency [10:35] and then the back plane [10:38] if we want to achieve am then we need to [10:41] consider [10:43] for the existing driving unit [10:46] lgpo what are the choices we have [10:51] so after our analysis we think we could [10:54] consider in following perspectives one [10:57] is the brightness [10:59] and then the size and then [11:02] the overall position of backline we need [11:06] to consider these [11:06] three if it is [11:10] less than 2000 at peak brightness [11:15] over 0.38 pg then there will be huge [11:18] possibilities [11:20] but if it is less than 0.3 [11:23] and the peak brightness is over 4000 [11:26] then we need to use our pde so we need [11:29] to consider the overall size [11:31] and precision requirement and that is [11:34] see the compensation technology [11:36] if we need to use backplane we need 3gc [11:41] so to achieve the internal compensation [11:44] issue we may use ic that is a key [11:47] technology for us [11:49] and the fourth is the transfer [11:51] technology that is also [11:54] a very important part for the [11:56] commercialization of micro [11:58] chips we have researched in different [12:01] perspectives [12:02] like the laser transfer or others [12:06] we are working on it to try to make [12:07] breakthrough so these are the four [12:10] areas that we want to make further [12:13] so we could achieve the [12:14] commercialization of mini and micro [12:16] next page [12:20] and now let's see for us [12:23] while we try to make breakthrough in [12:26] these four perspectives [12:27] what are our overall strategy we have [12:30] different stages [12:31] the fastest is the mini back plane we [12:34] already achieved that [12:35] for in 2018 and [12:39] launched it in 2018 and then we have the [12:41] backplane 2.0 version [12:43] we might go to high speed igb [12:47] and then we will do am on glass [12:53] we would do the small pitch direct [12:55] display [12:57] and then we will try to make breaks [12:59] through in [13:00] the west transparent glass and a [13:03] flexible [13:04] pi we will promote the transparent and [13:07] flexible [13:09] ele micro led that is the future trend [13:12] next page [13:16] well for us we will work in the [13:18] following four areas [13:20] and we call that pace this also shows [13:24] we will develop at different stages [13:27] in order to commercialize we need to [13:29] consider different perspectives [13:31] of products so first of all still the [13:33] picture quality [13:35] and second the appearance of the product [13:38] and the third led and overall efficiency [13:42] and fourth energy saving of the product [13:45] so i will talk in these following four [13:48] perspectives [13:49] how do we insure the product next page [13:59] and talking about the quality the first [14:00] part is that the [14:02] university of the picture quality we're [14:04] going to consider this one [14:07] the first is a [14:10] plus driver and also whether or not this [14:13] is going to give us some kind of a [14:14] deviation [14:15] and displacements so we're going to have [14:17] this particular kind of a structure [14:19] to really redevelop the whole process to [14:22] make sure that this is quite consistent [14:24] and second thing nowadays [14:27] in terms of the micro and mini led [14:30] products are made [14:31] the consistency and conformity should [14:34] actually be [14:35] reflected in two parts the rgd's [14:37] conformity and also the illuminance [14:40] so we are going to have the the formula [14:42] algorithm [14:43] to have a combination to really realize [14:46] the improvement of the picture quality [14:48] and third of all we already started the [14:50] process [14:51] that uh talking about the real effects [14:53] of the real products we're going to have [14:55] a kind of a backward forecast to see [14:58] that in a waiver fat what kind of [15:02] production should we do what are the [15:04] width what are the luminance [15:06] what are the kind of voltage and how to [15:09] distribute [15:10] in the very beginning we have to use all [15:12] kinds of different algorithm [15:13] to have this particular process so [15:15] through these three [15:16] major things we have to make sure that [15:18] the picture quality is actually quite [15:20] consistent [15:21] and also talking about the driver [15:23] perspective [15:24] probably you already know that in this [15:26] particular industry talking about [15:28] the mini and micro led we have [15:31] three drivers one is pm driver the other [15:33] is am micro ic [15:35] and the other is amt ift driving and [15:37] these three driving methods [15:39] are having their pros and cons [15:41] respectively for the tf part [15:43] so as i already stated that among the [15:45] three major [15:46] driving methods the pm driving [15:50] as everybody knows that they use a lot [15:52] of pw drive [15:54] and also on the glass panel we have all [15:56] the wirings [15:57] and also for this particular driving the [15:59] problem is that it's using time to [16:01] adjust the luminance [16:02] while the luminance we want to make it [16:04] very high [16:06] and i use time to control and also as [16:09] for the current requirement [16:10] of the chip well i see this was going to [16:12] be very high [16:13] so normally the current will be very [16:15] high so because of that [16:17] we have another kind of a method of some [16:20] active method [16:21] and next to it we have the am micro ic [16:24] it can be one to one or one to multiple [16:26] i can actually reduce the current and [16:28] also the drivers inside product could be [16:30] quite simple and back panel would be [16:33] because i already realized the moves and [16:34] also to make a micro ic [16:36] driving stability is good but cost is [16:39] high [16:40] and also if we make it on a glass the [16:43] tft [16:44] has a very high precision and also this [16:46] is a [16:48] high precision kind of a explosion proof [16:51] and i don't need to do any wiring can be [16:53] very precise [16:54] i can use the existing modules to do [16:55] driving so the pitch can be very very [16:58] small [16:58] and also luminous is very high and also [17:00] in terms of the driving cost [17:02] it can be further reduced so actually [17:05] talking about three major ways of [17:06] driving we are still focusing [17:08] on the mtft but [17:11] whether or not it's lto or ltds this is [17:14] going to be subject to different [17:16] form factors and also the product [17:18] features [17:21] and also take a look at this particular [17:22] kind of a compensation [17:24] object compensation algorithm if we [17:26] don't do any kind of a processing [17:27] the mosaic and also is going to be very [17:30] severe [17:31] so like to say for this particular [17:32] algorithm this becomes very important [17:34] and also sealing is very important [17:36] on the right hand side we have evaluated [17:38] the final effectiveness from the data [17:40] driven [17:40] all the way to processing and algorithm [17:42] compensation you can take a look at the [17:44] effects [17:44] very very clear right and obvious if we [17:47] compare [17:47] the kind of color garment as well as the [17:50] quality [17:51] and also the luminous very good improved [17:55] so you can see that the data volume on [17:57] the other hand is [17:58] massive so this is something that we're [18:00] going to try to resolve in the future [18:05] and also take a look at the appearance [18:07] because i made it on top of class so i [18:09] have to think about two things the first [18:11] is appearance of the product and second [18:12] how to mix a match [18:14] so if we put it on the glass the [18:16] matching kind of capabilities [18:18] are two first is the narrow bounding the [18:21] other is the back bounding [18:22] so for the narrow bonding actually the [18:25] problem is that [18:26] the pro is that we don't need to develop [18:28] new facility because the cost is cheap [18:30] but pitch cannot be as small as possible [18:32] so i think that the pitch [18:34] can be as low as 0.9 but if we want to [18:36] lower it further we have to do a super [18:38] narrow bonding technology [18:39] but if it's back bonding we can do a [18:42] very small pitch [18:43] but the thing is that we need to have [18:45] hundreds of millions of investment [18:47] for the facility another is extremely [18:50] dark [18:51] and also you can see that if the ic is [18:54] big [18:54] and also the pitch is very small it is [18:56] like i have a lot of [18:58] you know most yak on top of my wall and [19:00] also reflecting lights very seriously [19:02] so the contrast will be very poor but [19:04] how to make it [19:05] a very consistent black and dark without [19:08] changing information [19:09] i have to reduce the size of lycees and [19:11] also for the sealers and also [19:13] for the kind of a surface i need to do a [19:15] lot of processing [19:19] so for this particular part this is [19:22] something about the [19:23] extreme da and also i think that uh you [19:25] know [19:26] one is the kind of processing of the ic [19:29] and also [19:30] some kind of a consistency treatment of [19:31] smt and another is surfacing processing [19:34] so for example um one is for the [19:36] interface and the other is kind of a [19:38] restructuring of the formula [19:41] of the sealant so we can make the [19:43] contrast as beautiful as possible by [19:44] doing that [19:47] and then take a look at the capacity so [19:49] for capacity [19:51] we need to take a look at two things the [19:52] first is for the waiver production [19:54] capacity [19:55] and efficiency because we know that [19:57] there are two problems for the [19:58] manufacturing of waiver [19:59] first is small ic lack of demand in lack [20:02] of capacity [20:03] and second [20:06] the single kind of a productive capacity [20:09] this is not enough [20:10] as well because for the rest of the bin [20:12] i cannot use it [20:14] for current lack of capacity for the [20:16] single bin [20:17] is restricting the production yield as a [20:19] whole [20:20] so we are collaborating with our [20:21] partners to solve this issue the other [20:23] is the transfer efficiency so now for [20:26] the traditional [20:27] kind of uh uh dozens of k kind of a [20:30] technology [20:31] for the uph how can we actually know [20:33] change it into [20:34] hundreds or even thousands of k per hour [20:38] if we cannot make a very good [20:40] improvement of uph [20:41] or the yield and we [20:44] are having a lot of limitations over the [20:47] transfer efficiency [20:49] and also if we need to do productization [20:51] there is a big problem because [20:53] of the limited uph [20:56] and also take a look at this particular [20:58] improvement of the [20:59] production capacity of the ic first is [21:01] that we're going to make the ic [21:03] smaller and smaller and there are a lot [21:04] of restrictions in the future [21:06] and now in china for the many major [21:08] manufacturers with regards to the ics [21:10] manufacturers there are a lot of [21:12] problems [21:12] yield and capacity are not enough and [21:15] second if we're talking about the whole [21:16] process [21:17] if the ics and also transfer [21:19] technologies are not developed [21:21] i want to improve the efficiency of [21:23] transfer you may be thinking about using [21:25] 8gb 21 or 4 in 1 rgb [21:28] that seems that the transfer efficiency [21:32] can be hedged so we're going to actually [21:34] choose some kind of a middle [21:36] ground solution but the problem is that [21:41] when i'm illuminating the quality of the [21:43] picture is going to be impacted [21:45] so you can make the size very small but [21:47] the illuminating unit is packaged [21:50] so let's just say the picture quality is [21:52] going to be influenced [21:53] so finally this part is extremely [21:56] important [22:00] and also taking a look at the mass [22:01] transfer so here i only put two [22:04] transfer why only two because for the [22:08] electrostatic and also luminance uh we [22:11] have given a research to it but in a [22:12] short period of time [22:14] i think that uh in the short period of [22:15] time the quickest way [22:17] should be focus on this this is only my [22:21] opinion right [22:24] i believe [22:27] should be the most important thing [22:30] okay i may try to be quick so these two [22:33] technologies should be [22:34] breaking through and uh i think that [22:36] this is the most efficient way for us to [22:38] have a breakthrough [22:42] and another part is the energy saving [22:44] we're going to consider three things [22:46] the first is led luminance efficiency [22:49] second is the [22:50] transfer and also migration efficiency [22:53] migration ratio of the back panel [22:55] technology third is the ic energy saving [22:57] plan [22:58] and then reducing the saving as a whole [23:00] i'm speaking there is a about [23:02] 1 000 kilowatt hour above [23:05] per square meter so very very high [23:07] energy [23:08] consumption so we need to do further [23:10] adjustment in the future [23:14] and also talking about the ic i may skip [23:16] the details so normally speaking we're [23:18] talking about the [23:19] kind of efficiency improvement for the [23:22] internal [23:22] and also the external quantum and also [23:26] very quickly telling you the uh china [23:29] star side product the first is backlight [23:32] product the 75 inches 8k mled and also [23:36] the esport mnt [23:37] so we are already realizing the [23:39] prioritization because this is backlight [23:41] product so very quick [23:42] and also very quickly realized and also [23:45] taking a look at [23:46] this tbc 2020 we announced and launched [23:49] the 142 inch fhd mini led [23:53] igo on glass product and also [23:57] you know we realized the luminating and [23:59] also we have solved a little bit of the [24:00] problem [24:02] and next we're going to try to make the [24:04] machine as small as possible and also [24:06] four inch ig0 micro led normally [24:09] speaking [24:09] the kind of uh for this part we are also [24:12] you know trying to illuminate it [24:14] and we're using the staff mass transfer [24:17] technology to make it in-house by [24:18] ourselves [24:21] and also talking about the future we are [24:23] trying to pay attention [24:25] to the kind of flexible and also the [24:27] transparent direct [24:29] display and some of the samples and you [24:32] can see the details here and we are [24:33] doing the continuously the testing [24:35] and also in the future we're going to [24:37] have the uh positioning [24:39] of our products in the future [24:43] all right so much for my report and [24:46] next for the whole industry if we need [24:48] to make it successful [24:49] we need to have a combination of [24:51] upstream and downstream to realize [24:52] reduce the cost [24:53] and also improve the efficiency and [24:55] finally prioritize very successfully [24:56] thank you [24:58] thank you so much csca mr xiao [25:01] it's been really truly fantastic i would [25:04] like to ask [25:05] all the people who have a question to [25:06] write so in the chat and [25:08] raise the hand but i wanted to start [25:11] with the keynote presentation [25:12] professor xiao before we had your [25:15] question and answers [25:16] i have now the honor the huge honor [25:20] of introducing the people who made this [25:22] fantastic [25:23] meeting happen and those are the [25:26] secretary generals of the two fantastic [25:28] three fantastic associations today i [25:31] have the honor [25:32] and pleasure to introduce the director [25:36] general of epic [25:40] the world's leading photonic association [25:42] mr carlos lee [25:44] thank you so much for joining the [25:46] meeting today [25:52] thank you [27:04] technology [27:31] i have to say that's [27:37] i'm very happy to see you all here and [27:40] today [27:41] we do have a lot of good speakers and [27:43] experts and we can learn from each other [27:46] i really you truly understand what i [27:49] mean when i'm speaking mandarin [27:52] c carlos it is great to have you with us [27:55] this morning what an honor [27:57] i also would like to introduce a person [27:59] that means a lot to the micro led [28:02] industry i had the honor to co-chair [28:04] this event with him [28:06] secretary general secretary general of [28:09] sid professor [28:13] frank yang it is a special honor for me [28:16] to have you with us today [28:19] okay thanks thanks [28:22] the host and also it's my great honor to [28:25] be here today also [28:27] and also welcome everyone and good [28:29] morning or good afternoon wherever [28:31] and it's it's my pleasure to be here and [28:36] also we'd like to thank all the speakers [28:39] from you know from i say or [28:43] from our uh epact and [28:46] from peta and again it's [28:49] it's we really [28:53] like this opportunity to bring the [28:56] china and europe and also [28:59] other region of the in the world and [29:02] together [29:02] i think this is a great opportunity for [29:05] the company in china [29:07] and also the company in new york so they [29:09] can from [29:10] this event they probably can [29:13] set up some collaboration in the future [29:16] so again it's [29:17] uh welcome everyone and also [29:20] it is our a little bit [29:25] effort we put things together and i hope [29:28] we can [29:29] get some feedback from audience which is [29:31] very important so we can [29:32] we can make the event in the future [29:35] maybe [29:36] much more efficient and maybe more [29:39] fruitful [29:40] event in the future again thanks [29:42] everyone [29:44] thank you so much professor jam [29:49] i also have in the room the ceo [29:52] of pida mr lin [29:56] mr lin will be giving a keynote [29:58] presentation [29:59] about mini and micro led in taiwan later [30:03] but it is so great to have the support [30:05] of the top [30:06] people who are leading the associations [30:09] of micro leds worldwide what a fantastic [30:11] day [30:12] and with this part already done [30:15] let's go back to mr xiao mr xiao you [30:18] gave a fantastic [30:20] presentation there are a few questions [30:22] in the room [30:23] the first one is from my side [30:27] you have a fantastic slide [30:30] showing the different pitch [30:33] reduction that you are targeting in the [30:36] coming [30:37] years you said that going below [30:41] 0.9 could require a large [30:44] investment my question is is there a [30:48] market to go to such a small peace [30:50] reduction [30:51] and if it is is there some room for [30:53] cooperation with other companies [30:55] to help you get there [31:16] uh [31:18] our translation goes through yes it's [31:21] okay [31:22] people are people can't wait for this [31:24] silence the question is being translated [31:27] i will simplify the question mr chao how [31:30] small [31:30] in the pitch reduction would you like to [31:33] go in the coming years [31:34] and who can help you [31:41] hey sophos [31:48] james lost the connection okay we lost [31:51] the connection to mr [31:52] ciao but we will come back to him [31:55] afterwards [31:56] for the for answering some of the few [31:58] questions we have like the one from ruby [32:00] about silicon black plains needs we will [32:02] come to you afterwards to ask these [32:04] questions [32:05] why don't we move to the next speaker [32:07] today and the next speaker [32:09] is representing one of the big success [32:13] stories of automation in europe [32:16] we're gonna talk about micro transfer [32:19] printing and a company who made it real [32:22] for the micro led world alexander [32:25] chicaway [32:26] is the business the business development [32:30] director [32:31] of excel print and also a friend of mine [32:34] alexander thank you very much for being [32:37] with us today [32:38] excel print is a jewel of epic [32:42] the floor and the attention of everyone [32:44] in the entire world [32:46] goes to excel print [32:53] hi jose thank you very much for the [32:55] introduction i hope everybody can [32:57] hear me now thank you for uh for [33:00] inviting us [33:01] also for this call so uh we don't have [33:04] many times so i will go directly to the [33:06] point [33:06] uh today uh we're gonna i'm gonna [33:09] present you about [33:10] how do we form micro led using [33:13] a micro transfer printing technology but [33:15] also i wanted to uh divert more into the [33:18] 3d [33:19] heterogeneous integration and how we can [33:21] penetrate [33:22] other markets and displays as well so [33:26] um and now i need to go to the next [33:29] slide [33:30] uh i will make a very short introduction [33:35] excel print is pretty famous uh in the [33:37] display industry already [33:39] for micro leds uh we are um you know [33:42] developing micro transfer printing [33:44] technologies we're adapting the [33:45] technology with our customers [33:47] and we are a licensing company right [33:51] we have key markets that we address like [33:53] photonics [33:54] power management automotive mechanical [33:58] perception and may notice redisplay is [34:01] not written here [34:02] and this is what i wanted to explain is [34:05] that in the end of 2019 [34:07] excellent print has spun out another [34:09] company called xdisplay [34:11] and that company is actually developing [34:13] mtp [34:14] for displays and also licensing and [34:18] selling products so this is just a [34:20] little currently this [34:21] uh to to understand about it so [34:24] regarding the technology of [34:26] npv this really enabled true [34:30] 3d heterogeneous integration this [34:33] technology [34:34] can extract components from [34:37] this gallium arsenide [34:40] indium phosphide gallium nitride [34:44] and i will not go through the whole list [34:46] this technology [34:47] can manipulate extremely small [34:49] components down to one by one micron [34:51] type of components this technology can [34:54] manipulate extremely thin components [34:56] down to 500 nanometer [34:59] and this technology has also a very high [35:01] throughput because [35:03] you can transfer 100 000 or 500 000 of [35:06] components in one go [35:09] so the high those characteristics makes [35:12] this technology [35:13] very ideal to build 3d heterogeneous [35:17] integrated systems and also [35:20] this technology is in mass production [35:24] so this is important to notice that for [35:27] a long time we are producing for solar [35:29] very recently we are producing for lidar [35:32] systems [35:34] and they're going to be soon some [35:35] announcements of some high volume [35:37] production in the photonics industry [35:40] and what you can see on the right here [35:42] is a production printer the mtp200 [35:45] which is available from uh xdc company [35:49] so what the subject today is about mini [35:52] led and micro led [35:54] and the next slide is i think i really [35:56] like that picture [35:57] showing you a comparison between a mini [36:00] and a micro led so uh [36:03] this picture talks by itself there's an [36:05] scm on the left you have the mini and on [36:07] the right the micro [36:09] and what is interesting to notice is [36:12] this huge difference in thickness right [36:15] you can see the xy direction which uh [36:17] you know [36:18] here we can have like 80 by 125 micron [36:20] on the left [36:21] or maybe 80 by 19 micron on the right [36:24] but ultimately the main difference is [36:27] thickness [36:28] and that drives actually the application [36:30] for micro leds [36:32] where you need the component to be [36:34] extremely thin [36:35] micro led can be used that also drives [36:39] the way you interconnect things you [36:41] cannot do thin film [36:43] metal interconnect with a mini led you [36:44] have to use a flip chip bonding [36:46] with micro led you can use both so i [36:49] really like that picture this is a [36:50] courtesy picture from lexstar [36:53] you may know it's public that blackstar [36:55] is an mtp licensee for micro led [36:58] for display so this is [37:02] let's go now to the next point about how [37:05] do we form [37:06] the micro leds here is an example of a [37:09] process flow [37:10] where we are uh creating a gan micro [37:13] leds [37:14] out of gan on silicon micro dds so it [37:17] all starts with the epitaxial wafer [37:19] right where the substrate is silicon we [37:21] have a release layer [37:23] then we have again material [37:26] grown on top of the release layer doped [37:28] with the p and the end [37:30] the next step that we do is that we are [37:32] actually forming the micro led [37:34] by etching down again down to the [37:36] release layer [37:38] the next step is to add ohmic contacts [37:41] and then we're adding [37:42] dielectric to form the anchor [37:45] and the tether that will hold later on [37:49] the led [37:50] the next step is to reinforce the [37:52] contacts because you want to reduce of [37:53] course resistivity and you have to [37:55] you want to have thicker metal lines and [37:57] the final step [37:58] you are releasing the release layer and [38:01] this cartoon here doesn't show it very [38:03] well but this picture shows it's better [38:06] right at the end of the day your device [38:09] the micro led here [38:10] is kind of floating off top of your [38:12] wafer the release layer here has been [38:14] chemically removed chemically removed [38:18] it's hauled by its tether and its anchor [38:21] so this is a picture of the top view of [38:24] the wafer where you have [38:25] multiple micro leds aligned here and [38:28] that's what we call our print ready [38:30] wafer [38:30] so that micro leds are ready to be [38:32] transferred to the display backplane [38:36] another picture here is talking about [38:39] gan on sapphire [38:40] micro leds i'm not going to go through [38:43] the [38:43] process flow of how we can get again on [38:46] sapphire micro leds [38:48] but this slide is really to emphasize [38:49] the different method of interconnection [38:52] on the left side you have a flip chip [38:55] again on sapphire micro led [38:57] it has bottom pnn pads and this is a [39:00] method that we call interconnected print [39:02] so as we transfer the led the galvanic [39:05] connection between the pnn [39:07] junction and the metal lines that we can [39:10] see here [39:10] right are interconnected as we print [39:14] them this is a very useful method of [39:17] interconnect especially when [39:18] you want to move to a display repair [39:21] which is necessary to [39:22] achieve high yield on displays on the [39:25] right side [39:26] you have another method of interconnect [39:29] and as you know the micro leds are very [39:31] thin [39:31] and now thin film interconnect is [39:33] another possibility of interconnecting [39:35] the leds [39:36] it might not be the ideal method to [39:38] interconnect for displays [39:40] but it could be a very useful method to [39:42] interconnect for other type of [39:44] application [39:44] an example of a pss gun and sapphire [39:47] micro led [39:48] and those um i think are from lexstar [39:51] and the bottom picture is uh just [39:54] to show that the leds are interconnected [39:57] and as soon as you interconnect them you [39:58] can light up your display [40:00] and make a visual inspection if the [40:02] pixel has been well printed [40:03] or not [40:07] so as i said we worked and we have [40:10] processes for gun on silicon [40:12] green and blue micro leds we have [40:14] processes for gun on sapphire [40:16] we have processes available for gallium [40:18] arsenide red leds [40:20] we can handle lateral and vertical [40:22] structures [40:24] we can handle top pad and flip chip [40:27] and various sizes and here is a [40:30] real-time video of a micro led transfer [40:34] so you will see here those four leds now [40:36] just have been picked up [40:38] and are going to be transferred to the [40:40] display backplane here [40:42] thanks to our pdms stamp once they're [40:45] been transferred the pdms stamp is [40:47] moving now [40:48] to the clean pad which basically is a [40:50] scotch tape to remove all the dust and [40:52] to increase the number of [40:53] peak capabilities per wave per stamp [40:57] and then the stamp is coming back to the [40:59] source and [41:00] is picking up the next four leds here [41:03] and attack time here from for the whole [41:05] process i mean you've seen it it's [41:07] live it's about 20 to 25 seconds [41:10] and you don't only transfer four micro [41:13] leds like you can see here because of [41:16] the field of view view of the camera [41:18] you're actually transferring ten [41:20] thousand posts on that video [41:21] uh we can transfer ten thousand hundred [41:24] thousand or even more devices in one go [41:28] so the next thing is i really wanted to [41:32] emphasize what we're doing [41:33] for the 3d heterogeneous integration [41:36] you've seen on the previous slide [41:38] that we're transferring single leds [41:40] right but our next step was actually to [41:42] build micro packages [41:44] where we could interconnect together one [41:47] red [41:48] one green and one blue micro led into [41:50] one package [41:51] here is the size 70 by 35 micron and [41:54] that [41:55] small package can then be transferred to [41:57] the display backplane for instance [41:59] then we went further and we succeeded to [42:02] integrate [42:03] leds here you can see six micro leds [42:06] but they're on top of an ic and that ic [42:09] and the leds [42:10] are fully packaged and that's what we [42:12] call the pixel engine [42:14] so uh you have here an active pixels [42:17] with [42:18] six leds and an ic and that can also be [42:20] transferred to the [42:21] backplane so this is really the the base [42:24] of the 3d hi [42:26] uh integration and this is how x display [42:31] also uh is operating and that's why also [42:34] x display has been spun out and is [42:36] developing further the technology for [42:38] displays [42:39] using this pixel engine technology [42:41] they're doing a fantastic job since a [42:43] year [42:43] and they have developed the technology [42:45] further and this is really really [42:47] impressive what they have been able to [42:48] achieve [42:52] so 3dhi enabled us to move [42:55] from you know active pixel into the [42:57] display field [42:59] but what if for each of those [43:02] active pixels you are adding a sensor [43:05] this is feasible with 3d integration [43:08] right [43:09] and so when you're adding a sensor then [43:10] suddenly your pixel starts to be [43:12] intelligent [43:13] there's many many medical applications [43:16] which using very thin medical patches [43:20] uh who would need that intelligence [43:22] right you can see here a picture and [43:24] cartoon showing and a flexible micro led [43:27] array on top of a patch [43:28] but what if each of those leds were [43:31] actually a full system with micro leds [43:33] with a sensor [43:34] with a driver the possibilities are [43:37] infinite [43:38] here it's showing about photo [43:39] stimulation application into the medical [43:42] but you can guess easily that you can go [43:44] to many more applications [43:46] and we have a you know a very high [43:49] interest into those applications and [43:51] even have recently [43:52] some licenses in the medical field [43:55] another type of application is [43:57] automotive i know we're going to talk [43:59] later about automotive but here it's not [44:01] about [44:02] micro led into the automotive display um [44:05] micro led display into the automotive [44:07] world that i'm talking about [44:08] i'm talking about the interior lighting [44:11] so the number of leds [44:13] into the car are increasing a lot [44:16] and you know all the integration method [44:19] of light guides [44:20] all the control method will have to [44:22] change because the number of leds [44:24] growing [44:25] and here comes the need of potentially [44:27] intelligent [44:28] pixels which do not only contain the [44:31] light generation of micro leds [44:34] but we'll have also the led driver like [44:36] the active pixel [44:37] but we can have also a microcontroller [44:39] and bus interfaces [44:41] so this is also another application of [44:44] um you know 3dhi micro [44:47] systems that could go into automotive [44:51] another application could be [44:52] authentication [44:54] again there is no limitation in 3dhi [44:56] integration [44:57] you can have leds you can have a [44:58] controller memory [45:00] and you can have also power harvesting [45:02] devices that generate its own energy [45:06] so really what i wanted to say through [45:08] that is that [45:09] um you know this is the great value that [45:12] excellent print bringing [45:14] 3d hr integration beyond displays [45:18] and and the um applications are really [45:20] you know [45:21] infinite and i will finish here with my [45:25] last slide mentioning that the mtp [45:29] adoption [45:29] and the ecosystem is growing you can see [45:32] here [45:33] that we have multiple r d prototyping [45:36] lines [45:37] at xlab at micros tyndall institute [45:39] mainly based in europe [45:40] at imec but we also have in u.s some r d [45:45] lines [45:46] something which is uh completely new uh [45:48] it could be a scoop maybe today [45:51] we have our first mtp ready foundry [45:53] service by xfab [45:54] so today if you would like to have an [45:57] mtp [45:58] transferable and micro ic is made in [46:00] cmos technology [46:02] this foundry service at sex fab is [46:04] available [46:06] it's online on the website of xfab you [46:08] can have a look so this is [46:10] very new as well the [46:13] manufacturing systems you need for the [46:15] manufacturing and for the mttp [46:17] mass transfer you need a tool right so [46:19] xdisplay [46:20] is one of the tool manufacturer and also [46:23] here this is new information for [46:24] everybody [46:25] asm and micra is doing a mass transfer [46:28] tools that are available [46:30] for sale for mtp licenses [46:36] and the most important one of course we [46:38] need in this ecosystem customers and we [46:40] need led [46:41] companies moving into that so osram is [46:44] one [46:45] licensee of excel print and [46:49] lexstar in taiwan [46:52] is another licensee of xdisplay [46:55] in the field of displays we have many [46:58] more licenses i mean [46:59] we're talking about publicly disclosed [47:01] ones and [47:02] this is what we're really trying to [47:03] achieve now is to to to [47:05] to make this ecosystem grow [47:09] and i hope that i haven't exceeded the [47:12] time too much but [47:13] uh i would like to to thank you [47:15] everybody and i'm open to [47:16] any questions thank you very much [47:18] alexander cse [47:20] for a great great presentation it is [47:22] great to have you with us [47:24] we have a lot of questions for you in [47:26] the room [47:27] so i would like to the questions to be [47:29] asked by the question makers and we are [47:32] going to go [47:32] first to comtec solution one of the key [47:36] companies in epic [47:37] making equipment for passivation [47:39] technologies [47:41] yoko what's on your mind [47:45] hello yeah thanks thanks a lot alexander [47:47] for for them [47:49] very nice don't be shy we are not shy [47:52] today switch on your camera oh sorry [47:55] sorry that was uh [47:58] thank you so much can you hear me [48:02] we can see we can hear you we can see [48:03] you all the way from finland [48:05] yoga what's on your mind yes so [48:08] i was congested that is there any any um [48:12] performance penalty after the transfer [48:15] so if you compare the micro lens [48:17] on a wafer compared to the to the [48:18] transferred [48:20] transferred microlady so is there any is [48:22] the performance still the same or is [48:24] there any [48:25] penalty after your process [48:29] yeah i mean we have made enough [48:32] experiments to confirm that there is [48:33] absolutely no penalty [48:34] after transfer okay whether it is about [48:37] transferring ics [48:39] complex ics or even leds so the [48:41] performance are same or actually could [48:43] even be better [48:44] because the bulk silicon or other [48:47] substrate are [48:48] are not i mean are actually improving [48:50] the performance so [48:52] there is no performance change okay [48:55] good thanks the second question is [48:58] coming from one of the success [49:00] stories of semiconductor equipment [49:02] manufacturing in europe [49:04] evg all the way from austria mokapati [49:07] what's on your mind [49:11] thanks a lot jose and thank you [49:13] alexander for really [49:14] a very nice presentation um one actually [49:18] i have two different questions so one [49:19] thing is like the first one would be [49:20] what is the size limitation when you do [49:22] this transfer [49:23] and the second one is when you have this [49:25] pdm stamp you know once we start placing [49:27] it once you press it there might be a [49:29] lateral expansion [49:30] so i'm just wondering how do you cope up [49:32] with this [49:35] um sorry can you repeat the first one i [49:37] mean i understood the second [49:38] the first one is what is the size [49:39] limitation of the micro leds you're [49:41] transferring in this case [49:43] oh i think yes so i mean [49:46] there there is no real limitation i mean [49:48] i would say one by one micron [49:51] is what we think uh is a good uh you [49:53] know minimum size [49:55] uh we haven't tried below right but it [49:58] doesn't mean it's not possible [50:00] so uh and our first micro leds were 3x10 [50:03] so but you know then it's really about [50:05] your application maybe you need a larger [50:07] leds to generate more lights but so [50:08] that's why we think it's not [50:10] limitation really the second question [50:13] is um when we transfer the [50:16] the leds no there is no expansion i mean [50:19] we're transferring the components [50:20] uh the pdf is actually [50:24] so there's not much pressure applied to [50:27] the component [50:28] so the component itself is not damaged [50:30] uh [50:31] what could happen is that the component [50:33] may shift [50:35] because of you know the adhesive that is [50:38] on the target substrate [50:40] but those are controlled processes and [50:42] we can avoid that now easily [50:45] the next question in the room alexander [50:47] jacob [50:48] i like it you're gonna like it very much [50:51] drasid [50:51] what's on your mind [50:57] i will read it for him what is the [50:59] current yield and accuracy [51:01] that excel print can reach [51:04] yes i mean you know our current [51:07] yield i mean it's a very large question [51:10] right i mean [51:11] it really depends on many things but we [51:13] can comfortably reach uh four nines [51:15] ninety nine point nine nine percent in [51:16] transfer year [51:18] right uh when you're talking about [51:20] accuracy we started with 1.5 micron [51:23] accuracy plus minus uh we can also reach [51:26] one micron or less right it's really a [51:29] function of how many components you [51:30] transfer [51:31] versus the accuracy right so yes i mean [51:34] this is definitely enough [51:36] in terms of a cure for [51:39] residual components where we're using [51:41] yes [51:42] i am extremely extremely excited for [51:45] microtransfer printing when it comes to [51:47] yield and when it comes to [51:48] throughput so that's why i also love [51:50] that question [51:52] and the final question is coming from [51:54] one of the success stories [51:56] worldwide on massless lithography [51:59] grayscale lithography [52:00] heidelberg instruments dominique i [52:02] believe you have a broader question for [52:04] the whole event [52:05] but let's ask now and let's get first [52:08] alexander impression [52:09] yes good morning to everyone and thank [52:11] you alexander for the presentation [52:14] i have a i'm pretty ignorant in the [52:16] process of fabrication of micro led but [52:19] my question is quite general so how [52:22] maskless lithography or grayscale [52:24] lithography could be [52:25] helpful into the process of micro led [52:28] fabrication [52:31] well we're not using mass class [52:34] lithography at this stage because it's [52:36] not necessary right [52:38] uh however uh if you want to move to [52:41] even smaller components right that could [52:43] be necessary but this is not necessary [52:45] at this stage so [52:46] we're i cannot really comment more than [52:48] that we're not using it [52:50] for the moment uh but dominique later in [52:53] the meeting we are going to have [52:54] presentations from [52:56] b.o.e mr wang we are talking here [53:00] about one of the leading companies in [53:02] bringing new technology to display [53:03] manufacturing [53:04] you should ask the question then i would [53:06] be very excited to know the answer [53:09] but first i would like to now say to [53:11] alexander [53:12] congratulations of what you are [53:14] achieving it is a success story of the [53:17] european industry and having seen you [53:20] collaborating with companies like amicra [53:22] already making asm amicra already making [53:25] the equipment for the production [53:27] gives me goosebumps keep up the [53:29] fantastic job [53:31] thank you very much thank you we moved [53:34] with the program [53:35] and now i had the honor i had the honor [53:38] to introduce [53:39] the other worldwide renowned association [53:43] that is with us today we have p-i-d-a [53:47] in the room and we have it represented [53:49] by the chairman [53:50] kenneth thai by the ceo [53:53] mr lin but i want to go to kenneth thai [53:57] first because he's also a personal [53:58] friend of mine kenneth [54:00] thank you so much for being with us [54:02] today it is [54:03] 9 59 in the netherlands what time is it [54:06] for you [54:12] kenneth we can see you and i think we [54:14] can hear you yes [54:17] okay yeah okay hello everyone [54:22] good morning in europe [54:25] good afternoon morning [54:30] today i'm honored to have on behalf of [54:34] the taiwan [54:36] photonics industry to introduce [54:40] some of the good companies are [54:43] successful [54:44] in micro led area [54:51] the first one is a garment on e3 [54:55] industry technology research institution [55:01] it's a very good partners [55:05] for research and the development [55:12] plan nitrite is a very successful [55:16] company [55:16] in the mini led [55:20] one of the leaders in the world [55:27] and the southport the [55:30] automation testing [55:33] and the mythology inspection [55:37] that will be the leaders [55:45] pita is a photonics [55:48] industry development association [55:56] it's mission it's education [56:02] to provide the talent at the research [56:06] and the development and [56:10] also international corporations [56:18] i think one of the important thing [56:22] is china [56:25] and the us are very big [56:30] okay and europe [56:34] and the the best partner for europe [56:36] possible is taiwan [56:42] because taiwan needs europe [56:46] and i believe europe [56:50] also need taiwan [56:57] we are the gateway to china [57:03] to help the europe partners [57:12] just give you a number for reference [57:18] our export [57:21] to 150 billion us dollars [57:31] that's a huge numbers [57:36] and the continues to grow [57:43] the growth rate is 15 percent [57:49] and the ideal related [57:54] the broad i.t related percentage [58:02] about 65 percent is in our category [58:14] so in the technology area i think taiwan [58:17] would be a very good [58:19] gateway to help europe partner [58:23] to enter the china market [58:33] let's talk about the i.t industry [58:37] as a summary just give you a briefing [58:46] for the baby [58:54] we have own about i think at least 80 [58:58] or above [59:04] notebook is the same thing [59:13] server it's also same [59:18] because these three applications are all [59:22] office related [59:28] so no matter you are in africa [59:33] china europe [59:38] u.s or taiwan [59:44] it's all similar yeah and [59:48] i believe because of this sphere [59:51] technology it's a core [59:55] taiwan continues [59:58] will win this market for next [01:00:01] 10 20 years i believe [01:00:08] but unfortunately taiwan lost a [01:00:10] cellphone market [01:00:18] the server cell phone smartphone [01:00:22] products is not do by apple [01:00:31] it's really the first two model two [01:00:34] generation [01:00:35] is from taiwan [01:00:43] but because of it's related with the [01:00:48] the daily life [01:00:56] so taiwan lost the market [01:01:07] we are running out of time in this [01:01:10] industry [01:01:14] mr kennedy chairman of pidi and personal [01:01:17] friend of mine [01:01:18] we are running a bit out of time so if [01:01:21] you [01:01:21] put maybe a speed up a little bit [01:01:25] now okay the second second page [01:01:29] the next page is talking about a silicon [01:01:31] country [01:01:32] not only silicon valley but also 350 [01:01:36] and also packaging testing and the whole [01:01:39] supply chain that is a very important [01:01:41] message [01:01:42] to our europe partners [01:01:49] we can claim taiwan's [01:01:52] technology density taiwan [01:01:56] is the best in the world [01:02:00] okay then i talk about [01:02:03] another product important it's ic design [01:02:08] including silicon potentially come to [01:02:12] silicon photonics [01:02:13] and also x-aximos [01:02:17] that is a material is a so-called [01:02:20] heterogeneous integration [01:02:21] between material and the circuits [01:02:26] and the pdas scope [01:02:30] of photonics industry we claim that the [01:02:32] optics [01:02:34] opto electronics and because we are very [01:02:38] strong in silicon [01:02:39] so we separate electro optics [01:02:47] and then we add up another very [01:02:50] important [01:02:51] category is mature science [01:02:54] and equipment [01:02:58] taiwan is a big expired [01:03:02] enforced equipment and the materials [01:03:11] the next we talk about the micro [01:03:15] led eco systems [01:03:22] including the device [01:03:27] and the display [01:03:32] so in every category [01:03:36] we we all have play important players [01:03:42] i'm also the jdc ceo [01:03:50] we my device is active metrics digital [01:03:56] modulation [01:03:58] that technology is we are the leaders [01:04:08] and the back trend is 40 micro meter [01:04:11] below [01:04:15] yeah down to two micron like that okay [01:04:24] then uh i think what i like to promote [01:04:28] up to taiwan [01:04:34] after taiwan we were promoting the [01:04:37] technology so the category i will not go [01:04:40] to the detail [01:04:56] thank you so much for this great [01:04:58] presentation and [01:04:59] thank you next page is all the [01:05:02] communication [01:05:04] so we go through the line based [01:05:08] facebook in the link [01:05:12] and all the all the different [01:05:14] communication channels to [01:05:15] connect and interact with pida all the [01:05:18] way from taiwan bringing the [01:05:20] industry together kenneth you are an [01:05:23] example from this industry [01:05:24] with your vision of digitization with [01:05:27] the photonics industry [01:05:28] you have been a big driver of photonics [01:05:32] kenneth thank you so much for being with [01:05:34] us [01:05:35] i would like to now continue [01:05:38] with the program we have a i had the [01:05:42] honor [01:05:42] the owner of introducing our next [01:05:45] speaker today our next speaker is chia [01:05:48] xin [01:05:50] manager of electronic at itri [01:05:54] or e3 as some of us know it mr ciao [01:05:58] thank you so much for being with us this [01:06:01] beautiful morning [01:06:02] in the netherlands what time is it for [01:06:04] you [01:06:10] mr ciao yes here [01:06:14] yes it is 10 12 in the netherlands [01:06:17] what time is it for you okay here is [01:06:20] by 12. all right so [01:06:24] let's start the floor and the attention [01:06:26] of everyone goes to you [01:06:38] okay thank you very much [01:06:43] good morning everyone it's an idea to be [01:06:45] here [01:06:47] i'm just in chao belonging to e3 [01:06:53] the topic i'm going to talk about is [01:06:55] micro red 2.0 [01:07:00] frog is spread to heterogeneous micro [01:07:02] separate system [01:07:06] it's more about the next step of our [01:07:08] microarray research in e3 [01:07:16] in honor of this report i will go [01:07:18] through the [01:07:19] introduction [01:07:23] it is a total solution for microarray [01:07:28] and what we are working on for the next [01:07:30] generation micro led technologies [01:07:36] active smart pixel package is a kind of [01:07:39] a pixel package including rgb micro leds [01:07:43] micro driving ics and the sensor on [01:07:47] it as well [01:07:51] micro d4ar display has very high ppi [01:07:55] microalready pistols famous background [01:07:58] icing [01:08:02] featuring very high primaries for over [01:08:05] 20 000 minutes [01:08:12] and the last one is eye tracking [01:08:13] application using micro led [01:08:16] sensor which is [01:08:19] integrated with a of glasses [01:08:22] providing the i machine [01:08:26] interaction interface [01:08:33] micro d in recent years have seen rising [01:08:36] attention due to layers [01:08:38] supreme quality of the displays [01:08:44] among the current display technologies [01:08:46] microwave [01:08:48] aced in several categories like [01:08:52] vitamins power consumption [01:08:55] contrast and lifetime [01:09:05] all these advantages from this device [01:09:07] are very important [01:09:09] for a future display device [01:09:15] however the cost structure is still in [01:09:18] development [01:09:20] and the last micro led phase that they [01:09:23] display is very expensive [01:09:26] all the certain applications such as [01:09:29] esports and augmented reality [01:09:33] they do have different requirements for [01:09:36] the display device [01:09:37] and we believe microarray and [01:09:40] full name all [01:09:47] in italy we started our microalgae [01:09:49] research back [01:09:50] in 2009 [01:09:57] one a very simple passive treatment [01:09:59] matrix and the single color micro [01:10:02] display using jasper display background [01:10:04] ic [01:10:11] we gradually move on to the four color [01:10:13] technology with mesh transfer method [01:10:21] in 2020 ces we demonstrated the first [01:10:25] large area microarray basically spread [01:10:28] on [01:10:28] a sprint circuit board [01:10:33] which is much difficult to work with and [01:10:36] now [01:10:37] we are working on very high research [01:10:41] close to 2000 ppi for [01:10:44] ar mr and automatic displays [01:10:48] with micro ic driving for high [01:10:56] brightness [01:11:00] in e3 we have set up two important [01:11:03] platforms to several industrials [01:11:10] one is the chipper fabrication platform [01:11:12] and the other [01:11:13] is the mesh transfer platform [01:11:22] for triple application we have a class [01:11:25] 10 clean route in our life [01:11:29] and the full capability to do etching [01:11:32] thinking deposition and metal coating at [01:11:35] central [01:11:36] for mass transfer the fully functional [01:11:39] line was set up [01:11:41] to accomplish our recent demos [01:11:44] and several important functions like [01:11:47] initial lib test [01:11:51] morphology inception [01:11:54] chip transfer optical inspection [01:11:58] can all be done in e3 [01:12:05] all these are ready and is failing to [01:12:08] work [01:12:08] with industrial fire network [01:12:16] so far using the chip and the ms [01:12:18] transfer platforms [01:12:20] we have demonstrated a transparent [01:12:22] display [01:12:23] with over sixty five [01:12:26] percent expectancy by mass transferring [01:12:29] rgb [01:12:30] micro leds on two gas subtree [01:12:35] micro led on pcb for pid [01:12:38] digital damage or indoor applications [01:12:48] press forward without disgrace and the [01:12:50] ar microwave play with [01:12:53] very high ppi uh what we are doing [01:12:59] well oa our high ppi micro display [01:13:04] the integrated single column microsd [01:13:06] array [01:13:07] with the current black color conversion [01:13:09] layer [01:13:10] has been treated as one of the solutions [01:13:14] for high resolution four color displays [01:13:20] it's all integrated with spectres [01:13:24] are the powerful functions large circuit [01:13:27] can bring in and [01:13:29] the compactness of the overall volume [01:13:39] each we can play a role to coordinate [01:13:41] whole supply chain [01:13:43] to make a practicing commercialization [01:13:46] in [01:13:46] taiwan [01:13:50] canada component manufacturing [01:13:53] system and also make the system [01:13:56] manufacturer can make sure their product [01:13:59] can be mass transfer [01:14:02] mass production also we'd like to [01:14:05] mention more [01:14:07] little bit a little bit is modular [01:14:10] timing [01:14:11] which is the key process step for larger [01:14:14] size micro led display [01:14:26] tiny in general is a technique to piece [01:14:29] everything together to get a larger [01:14:31] display [01:14:34] it is beneficial because a smaller panel [01:14:36] usually can be [01:14:38] manufactured with a higher yield [01:14:44] but several expenses need to be [01:14:46] addressed [01:14:47] first is the precision in assembly [01:14:51] second is the repeatable process [01:14:56] and the third is that we need to achieve [01:14:59] a seamless [01:15:00] space eternal neighborhood peace [01:15:07] there are several things we need to pay [01:15:09] attention to when we work [01:15:12] on timing [01:15:15] the best case is like in product a [01:15:18] where everything fits perfectly [01:15:21] however charity we are going to [01:15:24] space is the product b [01:15:27] where the gas is tired and tightened in [01:15:30] the [01:15:31] now straight away this can [01:15:34] rise from the imperfect location of a [01:15:37] set school in the background not a did [01:15:41] the titan [01:15:44] in privacy the situation could be the [01:15:46] gas edge already [01:15:48] got some damage before either [01:15:51] cheapened over cranks due to cutting [01:15:58] the stress during the splicing can make [01:16:01] the condition worse [01:16:02] and shorten the lifetime of the module [01:16:08] in property another possibility is due [01:16:11] to [01:16:11] imperfect cutting of the gods of peace [01:16:14] and in slanted ages numerical ages [01:16:18] can lead to extreme extra stress [01:16:22] to process and need to introduce [01:16:29] so precision in gas cutting and the [01:16:32] accuracy placement of each class module [01:16:35] are [01:16:35] quite important to achieve perfection [01:16:44] one of the critical techniques the verb [01:16:47] in e3 is the laser carving and the [01:16:50] trimming of the lip [01:16:51] gloss we use the [01:16:55] first the solid state laser and the [01:16:58] laser optics is optimized [01:17:00] to natural summer damage [01:17:05] we can reduce the wrong width from 115 [01:17:14] minecon [01:17:17] another thing that we achieved here is [01:17:20] to have [01:17:20] hd pin smaller than five micrometer [01:17:25] and the glass is cut at almost [01:17:28] 90 degree angle corners [01:17:32] on the left hand side is the finished [01:17:34] module with two by twos piece of glass [01:17:37] keys at the gator and the total area is [01:17:40] the 6.4 centimeter by [01:17:42] strip 32.2 centimeters [01:18:00] on a glass near microwave with [01:18:03] specimental connector [01:18:05] so after we light up the micro id arrays [01:18:09] we can have a photo like a bottom right [01:18:12] click [01:18:13] the radiation line shows the actual [01:18:16] boundary of the true gas [01:18:18] and we see very tall trace from the [01:18:21] timing [01:18:24] meaning that our preliminary work is [01:18:27] successful [01:18:28] currently we are planning in a [01:18:31] four complicated three by three modules [01:18:34] with possible [01:18:35] new functions on the tile the [01:18:39] phrasal display [01:18:44] now let's move on to the second part of [01:18:46] the literary project [01:18:47] micro reduce 2.0 [01:18:53] initially we are planning in next [01:18:55] generation microarray display [01:18:57] technologies [01:19:01] referring to your report on human [01:19:05] machine interface [01:19:06] in this place the end goal [01:19:10] for hmi features in display [01:19:13] is not integrating everything in the [01:19:16] display [01:19:17] to maximize the user experience [01:19:23] make a display smaller display my [01:19:25] quality has small [01:19:27] size compared to the whole pixel area [01:19:30] size [01:19:31] there is a large area in the pistol to [01:19:35] put [01:19:36] another air's components like micro [01:19:38] sensors [01:19:39] and the micro driving is on it lots of [01:19:43] functions can bring in to [01:19:46] the display for micro d2.0 [01:19:50] we are upgrading the mass transfer [01:19:52] method to [01:19:53] intergenius microassembly technology [01:19:58] by integrating rgb microwave design to [01:20:00] micro drivers [01:20:02] with sensing functions [01:20:05] this kind of active smart piece of [01:20:08] package unit [01:20:09] is developing or achieving hybrid sensor [01:20:13] interactions with display and the armr [01:20:17] used [01:20:23] in active smart pistols lady proposed a [01:20:26] very smart piece of package of concept [01:20:30] in which rgb micro id are [01:20:33] integrated onto micro ics using [01:20:36] wafer scale assembly technologies [01:20:41] it addresses the issue of ear [01:20:44] throughput and the cost of binomial [01:20:47] diets [01:20:48] reducing number of mass transfers as [01:20:50] well [01:20:54] based on this concept we have [01:20:57] preliminary study the possibility of the [01:20:59] novel [01:21:00] integrating approach designed in [01:21:04] a way but no good site inspection and [01:21:06] the safe repair function of the mesh [01:21:08] transferring [01:21:10] it will enable and open up the many [01:21:14] aspects of the display applications [01:21:20] one of the display application is [01:21:22] argumentator reality [01:21:24] classes [01:21:27] many giant companies like april google [01:21:31] facebook and central think [01:21:34] mr glasses are very potential to be the [01:21:37] next [01:21:37] big things after smartphones [01:21:42] the future ar glasses on the right side [01:21:46] will be slim and lightweight like normal [01:21:54] glasses [01:21:56] and it has all functions that [01:21:57] smartphones can do [01:22:01] it provides a display computing [01:22:03] connecting [01:22:04] internet and the most important things [01:22:07] of the [01:22:07] friendly i always backup mouse and cable [01:22:11] for pc [01:22:12] and the touchscreen for smartphone we [01:22:15] believe this hmi [01:22:17] will be eye checking which can be [01:22:20] achieved [01:22:20] by smart pixel architectures of micro [01:22:22] microarrays [01:22:25] during generation one of ar classes that [01:22:28] we are developing is based on regular [01:22:30] website combiner artists [01:22:33] to integrate the single color led array [01:22:36] with the color conversion layer realize [01:22:39] the high resolution [01:22:41] wall color display here is the [01:22:44] cross-sectional view of our design [01:22:51] this is our timeline for developing [01:22:53] generation one micro advanced display [01:22:55] for mr [01:22:57] around 2022 we will integrate it into [01:23:00] smart [01:23:01] mr glasses with full hd resolution [01:23:04] and 20 thousand means of five brightness [01:23:10] augmented realities and in the educative [01:23:14] web method to enhance your experience [01:23:16] with [01:23:17] you surrounding environment they are [01:23:20] mr glasses could potentially replace the [01:23:23] smartphone in the future [01:23:25] to achieve these these are major [01:23:28] requirements [01:23:29] larger fob compactness [01:23:32] lightweight and the friendly hmi need to [01:23:36] be a tourist [01:23:40] a great microphone high resolution and [01:23:43] frightening and that was very [01:23:46] okay [01:23:50] so uh very low problem is necessary [01:23:54] meta lens optics plays an important role [01:23:57] to shrinking up [01:23:58] the engine size and improved experiment [01:24:01] is [01:24:02] corruptly also in addition to voice and [01:24:05] adjust to hmi [01:24:06] eye tracking will be a permission hmi4 [01:24:09] and markus is a providing [01:24:11] more friendly interactive way [01:24:16] i checking for wearable mr glass is [01:24:18] potential application of micro ads [01:24:20] sensors the left side is up to day [01:24:24] traditional eye tracking glasses which [01:24:26] use four timing camera [01:24:29] and several iii is to track ipos [01:24:32] the most constrained issue by system [01:24:34] vendors is on randomly id designed [01:24:37] due to the large cameras and the iit [01:24:40] components [01:24:41] it's unable to integrate it onto the [01:24:44] future lightweight [01:24:45] mr glasses on the right side another eye [01:24:48] tracking technology [01:24:54] can achieve very high rate and ultra low [01:24:58] power constraint [01:24:59] overall at least five times the [01:25:01] enhancement compared to traditional [01:25:03] eye checker the ir microads works both [01:25:07] as [01:25:07] illumination and sensing functions and [01:25:10] are [01:25:10] must transfer onto the surface of the [01:25:12] glasses [01:25:14] their size is more than five minecon [01:25:17] keeps the glass transparent and [01:25:19] clear it will not block life size [01:25:22] the point is no idea defined issue needs [01:25:24] to be addressed anymore [01:25:29] and nvidia also demonstrates this type [01:25:31] of sensor based eye tracking [01:25:33] in this initial prototype piano which [01:25:35] uses several regular iots on glasses [01:25:38] frame the tracking accuracy is around 1 [01:25:41] degree [01:25:42] and also show verifies the separate rate [01:25:44] up to 250 [01:25:47] hertz for our sensor array base that we [01:25:50] use [01:25:51] larger array of micro sensors [01:25:54] to improve the eye tracking accuracy to [01:25:56] smaller than one [01:25:57] degree [01:26:01] microli a sensor array is now category [01:26:05] of sensing technologies [01:26:07] in addition to uncast [01:26:10] micro sensor array can be put onto the [01:26:13] back side of the smartwatch [01:26:14] for example it could work for vanity [01:26:16] sensing and the [01:26:18] bio single monitoring for precision [01:26:21] care application as well [01:26:24] okay this time summarizer for intention [01:26:27] thank you very much [01:26:28] thank you thank you so much mr ciao for [01:26:31] this fantastic presentation [01:26:34] which is full full of collaboration [01:26:36] opportunities [01:26:37] which is what i like the most there is [01:26:40] some questions in the room [01:26:42] of people that want to help you and i [01:26:44] want this to happen [01:26:46] after this meeting so the first question [01:26:49] is coming from nkt photonics [01:26:52] all the way from denmark one of the key [01:26:55] companies in super continued lasers and [01:26:57] specialty fiber who signed imam thank [01:27:00] you very much for being with us [01:27:02] what's on your mind um [01:27:05] uh we have done some thin glass [01:27:06] processing uh with ultrafast lasers [01:27:08] before so we were just interested to [01:27:10] hear a little bit more [01:27:11] of the uh requirements that italy have [01:27:14] for the glass cutting [01:27:16] and to see whether we can help [01:27:21] mr ciao the question is about glass [01:27:23] cutting what are your challenges [01:27:39] the cutting accuracy and the cutting [01:27:42] angle [01:27:43] area we hope we could be less than [01:27:47] five micron [01:27:52] okay less than five micrometers [01:27:55] if you want to go less than five [01:27:58] micrometers [01:27:59] even a lot less than five micrometers [01:28:01] even less than one micrometer [01:28:03] we have companies in epic that can help [01:28:06] you [01:28:07] and i would like to recall companies [01:28:09] like workshop of photonics [01:28:11] in a lithuania or inolas [01:28:14] in munich they are doing fantastic job [01:28:17] on that [01:28:18] the next question is coming [01:28:21] from the company au optronics [01:28:25] andrea liang my friend andrew what's on [01:28:28] your mind [01:28:35] andrew andrew is wondering about [01:28:39] the test that you follow for the testing [01:28:43] of micro leds what is the process for [01:28:46] testing micro leds [01:28:48] do you just do l i v light [01:28:51] current voltage test [01:28:58] we have a inspection including an iv [01:29:02] testing [01:29:03] and the morphology testing and the [01:29:05] article inspection [01:29:10] okay i would like [01:29:13] to go to the next question is coming [01:29:16] from [01:29:17] hopto after you are wondering about the [01:29:20] state of the art [01:29:22] would you like to ask the question [01:29:23] yourself [01:29:29] i might they are wondering [01:29:33] about you are aware of the state of the [01:29:36] art [01:29:36] for usp laser fila [01:29:40] spots for cooperation [01:29:50] i will let this to be done after the [01:29:53] meeting i will make sure the two of you [01:29:55] are introduced [01:29:57] i would like to go to the next question [01:29:59] is from southport [01:30:01] from southport i jang cheng [01:30:05] from southport what's on your mind [01:30:12] hello hello uh actually please ask your [01:30:16] question [01:30:18] actually i just want to say uh the [01:30:21] susport system [01:30:22] with jdc spec plan can do the liv [01:30:25] curve measurement with uh under maybe [01:30:30] 10 smaller than 10 micro meter [01:30:33] id [01:30:40] okay so he's commenting about the [01:30:44] the size of the mic leds [01:30:52] you commented about 6.4 micrometers is [01:30:54] there an interest to go [01:31:00] lower [01:31:03] yeah actually our goal is to be less [01:31:05] than five micron [01:31:09] fantastic ciao mr ciao i want to help [01:31:12] you i have a lot of companies [01:31:14] in epic that can help you the next one [01:31:17] can help you [01:31:18] we are going to go to dresden because i [01:31:19] have a question from over vogel [01:31:22] from frank hoffer fep in germany a [01:31:27] research center that made mastering [01:31:30] an outlet on micro leds for [01:31:32] manufacturing and role to roll [01:31:34] over thank you very much for being with [01:31:36] us ahead of this place [01:31:38] and sells also from hofer fep what's on [01:31:41] your mind [01:31:43] hello nice to see you as well uh i have [01:31:46] a question related to one of the [01:31:47] or some of the last slides of the [01:31:49] previous presentation [01:31:50] uh this was actually mentioning [01:31:52] integrating sensor pixels for eye [01:31:54] tracking [01:31:56] in ar glasses and i was wondering [01:31:59] if those sensing pixels are actually on [01:32:02] the same [01:32:03] die as the micro led pixels [01:32:06] which would be on a micro display or is [01:32:09] it are these separate dies or how does [01:32:11] it work [01:32:12] this is the same chip or they somehow [01:32:13] distribute it or how is it [01:32:16] thank you [01:32:20] i check in the in your friend for the [01:32:24] eye tracking applications [01:32:26] the pixels we use are very less actually [01:32:30] just dozens [01:32:33] of pixel array unlike the display [01:32:38] pixel [01:32:42] okay and i would like to also get [01:32:45] one more question in the room this one [01:32:48] is coming from the ceo [01:32:49] of comtech solutions all the way from [01:32:52] finland [01:32:53] equipment supplier for passivation [01:32:55] technology [01:32:56] vicente calvo what's on your mind [01:33:00] yes hello everyone yeah i just wanted to [01:33:02] ask [01:33:04] mr chao he mentioned that they want to [01:33:06] go below five microns and i would like [01:33:08] to know what are the challenges to get [01:33:10] there [01:33:10] what are the challenges they have and [01:33:12] also when they go to so [01:33:14] small size and pitch how they do to fit [01:33:18] in [01:33:18] all those sensors in between the display [01:33:20] pixels etcetera [01:33:22] thank you [01:33:29] hi well understanding is that to reduce [01:33:33] maximum actually we could be [01:33:36] very small even one to two micron [01:33:39] but the thing is if the size is smaller [01:33:42] then the efficiency [01:33:43] will be reduced sharply so [01:33:47] because we consider the efficiency [01:33:50] so it's not just the size we consider [01:33:54] also the efficiency also when it turns [01:33:56] too colorful [01:33:58] we use the big power solution but [01:34:02] if the size is small then the overall [01:34:04] will be more difficult [01:34:07] let me remind everyone that when this [01:34:09] meeting finishes [01:34:11] we are gonna get a link in the chat for [01:34:13] all of us [01:34:14] for all of us to go to the wonder [01:34:18] dot me website when we are gonna get to [01:34:20] know each other [01:34:21] so when the meeting finishes please [01:34:23] remember to click on that link [01:34:25] that you will receive in the chat the [01:34:27] purpose of this meeting [01:34:28] is not only to hear great presentations [01:34:31] but to make [01:34:32] new friends i love doing that and i also [01:34:35] would like to say that [01:34:37] i wanted to share the first part of this [01:34:40] event [01:34:40] the next chair is going to be professor [01:34:42] yang i had the huge honor to speak [01:34:45] before professor yang i will cherish [01:34:47] this moment for [01:34:48] my whole life this is my wechat qr code [01:34:52] so if you want to be my friend scan my [01:34:54] qr code [01:34:55] i will be more than happy to talk to you [01:34:58] afterwards thank you very much [01:35:02] professor yang the floor the meeting [01:35:06] goes to you okay jose [01:35:09] thank you very much for a nice [01:35:12] you know host this conference so far [01:35:14] it's it's a great [01:35:15] uh the honor to work with you for this [01:35:17] event [01:35:18] okay so i'm gonna uh [01:35:21] taking chat the rest of the event [01:35:24] and again thanks to and [01:35:28] for the previous talks and i would [01:35:31] give the product for those excellent [01:35:33] speakers and [01:35:35] and the presentation for the remaining [01:35:38] five [01:35:38] speakers and i just want to remind [01:35:40] remind everyone [01:35:42] and we have 15 minutes presentation [01:35:46] so please keep in time and [01:35:49] hope we can actually have more time for [01:35:52] discussion [01:35:53] so okay and let's move on to the next [01:35:56] speaker [01:35:56] it's from b.o.e [01:36:05] it's from uh mr kerwan mr one [01:36:09] so mr one are you ready [01:36:14] okay okay yeah [01:36:19] okay right so mr one you can start [01:36:22] ready [01:36:27] please wait let me put in the full [01:36:28] screen mode [01:36:32] all right hello good morning everyone [01:36:34] and good afternoon i am [01:36:36] wanker from ble first of all very [01:36:38] honored to be invited to attend today's [01:36:40] webinar and also deliver my [01:36:43] presentation and today my topic is [01:36:46] the challenges faced by the development [01:36:48] of micro led and the mini led [01:36:51] display [01:36:54] so i have four parts in my presentation [01:36:56] the first part [01:36:57] is the background of the mini led [01:37:00] display [01:37:01] and also micro led and second is [01:37:03] application of mini and micro ld [01:37:05] and third the challenges of the [01:37:07] development of the display [01:37:08] and firstly i'm going to introduce to [01:37:10] you the r d of the [01:37:12] micro and mini led dle [01:37:15] first of all the background of the media [01:37:17] led and mini and micro led you should be [01:37:19] very familiar with this chart [01:37:21] so while we are reducing the size of led [01:37:24] the packaging way [01:37:25] is changing from smt to cop and [01:37:28] also the applications are going to [01:37:32] found in the lighting lcd backlight [01:37:34] units all the way to [01:37:36] led video wars and also finally to the [01:37:38] micro led video walls [01:37:41] comparing with the traditional led or [01:37:44] oled micro led [01:37:45] has a lot of natural advantages for [01:37:48] example [01:37:48] high ecoe high luminous and also high [01:37:51] contrast [01:37:51] high gala garment as well as the long [01:37:54] life cycle [01:37:56] and also very short response time and [01:37:59] also low power [01:38:00] very extreme advantages here [01:38:05] and also talking about the application [01:38:08] of mini and micro led there are three [01:38:10] parts [01:38:11] the first one is the mini led backlight [01:38:14] combining together with the traditional [01:38:16] lcd [01:38:17] we can realize a super high contrast [01:38:20] and also super high luminance and second [01:38:23] part [01:38:23] is the [01:38:27] video wall of midi led so we can have a [01:38:30] seamless [01:38:31] splicing and to realize an oversized [01:38:34] display [01:38:35] and also the third one is the micro led [01:38:38] display [01:38:38] and you can see that in terms of the [01:38:40] flexible display [01:38:42] and in terms of the transmittance [01:38:44] display they are going to have a lot of [01:38:46] natural pros and also the third part [01:38:51] is while we are developing the micro id [01:38:53] and mini led display the challenges [01:38:55] we are having so first in terms of the [01:38:58] chip [01:38:59] process because of the unevenness of the [01:39:02] itching there was a sound [01:39:03] a sad ground issue and this particular [01:39:06] kind of issue [01:39:07] is going to really impact the efficiency [01:39:10] of the uses and while we are reducing [01:39:12] the size of [01:39:13] micro led the kind of application [01:39:16] efficiency will be significantly reduced [01:39:19] and the second wall the eqe peak [01:39:22] shifted to a high [01:39:26] current density area so that is to say [01:39:31] uh this is not good for the low current [01:39:33] driving as a design [01:39:35] and also second part is that in terms of [01:39:39] the am [01:39:40] driving um circuit we have a challenge [01:39:44] first of all comparing with the oled eqe [01:39:48] the kind of difficulties are high than [01:39:51] micro quality and it's a high luminous [01:39:53] it's not [01:39:54] easier and a convenient for us to use it [01:39:56] as a direct display [01:39:58] and also because of the high eqe area [01:40:01] with a very high luminous so we need to [01:40:04] actually introduce a tpwm [01:40:07] kind of a driver and also in a [01:40:10] eqe area this is a very big [01:40:13] area with a large current so there's the [01:40:16] reason why we need to have a larger area [01:40:18] for the driver circuit [01:40:19] so that we can actually drive the [01:40:21] display [01:40:23] so this is also something [01:40:25] disadvantageous to the application of [01:40:28] high ppi [01:40:29] and third is that at low grade scale eqe [01:40:32] is too low [01:40:32] and power consumption is too high and [01:40:35] also the pwm design [01:40:37] has also a problem of flicker and the [01:40:39] fourth point [01:40:40] is for the air drop and also the [01:40:43] topic of lower down the power [01:40:45] consumption [01:40:46] and third challenge here is the color [01:40:49] purity and also the garment [01:40:51] and also because of this issue they're [01:40:53] going to actually [01:40:54] impact the whole performance of the led [01:40:56] display [01:40:58] and because of different current the [01:41:00] wavelength [01:41:02] of led illuminating is different and [01:41:04] there might be some kind of a shifting [01:41:06] so there is a kind of uh the colored [01:41:08] garment shifting as an issue [01:41:10] and also the uh chromatic abrasion and [01:41:12] also [01:41:13] another part is for the mass transfer [01:41:15] technology the mass transfer technology [01:41:17] we need to have a very high precision [01:41:19] and also higher efficiency and also high [01:41:22] yield [01:41:22] and also low cost at the same time and [01:41:25] now all the different uh [01:41:26] partners are producing their own mass [01:41:29] transfer technology electronic [01:41:31] absorption and also like sorry [01:41:33] electrostatic absorption rotor road [01:41:35] transfer [01:41:36] laser transfer or stamp transfer or [01:41:38] fluid [01:41:39] transfer amongst so many technologies [01:41:42] i am more in favor of laser transfer and [01:41:45] i think that for the laser transfer [01:41:49] together with our tmc [01:41:52] tmt large size gn10 fab we're going to [01:41:55] realize [01:41:55] a higher yield with lower cost [01:41:58] and fifth challenge here is in terms of [01:42:02] the [01:42:02] testing and repair so in terms of the [01:42:04] testing and inspection [01:42:06] we do have a pl and also er inspection [01:42:09] so [01:42:09] for pl [01:42:13] it inspection can help us to realize a [01:42:16] high efficient [01:42:17] inspection however the precisionness of [01:42:20] the inspection is still problematic [01:42:22] and in terms of er inspection because [01:42:24] the precision is [01:42:25] very high however if we actually know [01:42:28] conduct er inspection for every led [01:42:31] the efficiency is going to be [01:42:32] compromised and in terms of the repair [01:42:37] i'm speaking there are two issues here [01:42:40] so first [01:42:40] if we use the redundant circuit as a [01:42:42] design and then for this [01:42:44] redundant circuit this is going to take [01:42:46] a very large proportion of the [01:42:48] display area so in the future this is [01:42:51] going to enter [01:42:52] a kind of a large ppi application and [01:42:54] also a second thing is the large [01:42:57] area laser repair this is also one of [01:43:00] the major topics that we are confronting [01:43:01] with [01:43:03] and also now the fourth part will be the [01:43:05] introduction of [01:43:06] ble micro led and mini led rng plate and [01:43:10] also our product plan as well [01:43:11] so first of all boe is actually a [01:43:14] company of making the [01:43:16] backlight uh back panel as a as a major [01:43:18] technology and fundamental technology [01:43:20] and also poe actively promote the micro [01:43:23] and mini led technology and product [01:43:24] development based on that [01:43:26] and we have three directions the first [01:43:27] is the mini led backlight [01:43:29] so in this area we're going to actually [01:43:33] use [01:43:33] the glass-based midi led blu to actually [01:43:36] achieve the [01:43:37] performance upgrade and this particular [01:43:39] product is going to be [01:43:41] actually a mass produced at the mid of [01:43:43] this year 2021. [01:43:45] so the uh dimming zones uh is larger [01:43:48] than 1000 contract ratio more than 1 [01:43:50] million [01:43:50] and also brightness of a larger than [01:43:53] 1000 nits [01:43:54] and the second is the mini led uh [01:43:57] display [01:43:58] so now is a glass-based pm display [01:44:01] to really realize the large size [01:44:03] seamless splicing [01:44:05] display and this particular product is [01:44:07] going to be massively produced [01:44:08] in 2021 um covering the seven inch to [01:44:11] all size [01:44:12] pitch can be lower than 0.9 [01:44:15] and third direction is the micro led [01:44:19] display [01:44:20] and in this area together with our back [01:44:24] plane [01:44:24] technology advantages we are going to [01:44:26] actually respond to the market and [01:44:28] coordinate our development and develop [01:44:30] as soon as possible currently speaking [01:44:32] we are researching [01:44:34] on a further advancement of back plane [01:44:37] driver technology and integration with [01:44:39] the micro id [01:44:40] technology [01:44:43] and also in terms of the backlight of [01:44:45] mini led [01:44:47] the technology core is actually a kind [01:44:50] of a low cost [01:44:51] glass based and high brightness and high [01:44:53] partition [01:44:54] and also the full size or less slicing [01:44:57] and also high transfer efficiency [01:44:59] and in terms of this particular design [01:45:02] comparing with the pcb [01:45:03] backplane the glass plane can be super [01:45:06] thin [01:45:07] and also with a less splicing and also [01:45:09] very low warpage [01:45:11] and high stability and reliability also [01:45:14] in terms of the driving we can [01:45:16] realizing a ultra high peak brightness [01:45:19] of above 1000 nits [01:45:21] and also at the same time we are [01:45:22] introducing the low [01:45:24] resistance metal copper technology [01:45:27] realize a [01:45:28] local dimming zone of 1000 and also 5000 [01:45:32] and also in terms of the transfer mass [01:45:35] transfer [01:45:35] we can have over 100 hertz 10 times [01:45:39] the regular pick and place method and [01:45:42] also the efficiency is 10 times higher [01:45:45] and also the accuracy is very high [01:45:48] and also in terms of the whole process [01:45:50] together with [01:45:51] the low-cost glass-based [01:45:54] advantage we can really you know help [01:45:59] to reduce the overall product cost [01:46:04] and from 2019 onwards ble started [01:46:07] to launch all kinds of different mini [01:46:10] led backlight products [01:46:12] in 2019 we had an [01:46:15] onboard backlight for automotives with a [01:46:17] 12.3 inch [01:46:19] and also on ipc 2020 boe launched the [01:46:22] monitor at 27 inch [01:46:23] and also this super larger backlight 75 [01:46:26] inch for tv [01:46:27] so these backlight products are going to [01:46:29] realize [01:46:31] over 1 000 nits of [01:46:34] luminance and the 75 inch now can [01:46:37] actually have 5 000 local dimming zones [01:46:41] under the this is the model [01:46:48] and in terms of the mini led display of [01:46:51] ble we are laser focused [01:46:53] on the semicon technologies seamless [01:46:56] splicing with high brightness and [01:46:58] flicker free so by having a super thin [01:47:00] design [01:47:03] and also our special arbitrary kind of [01:47:06] splicing technologies [01:47:07] we can actually realize a very kind of a [01:47:09] low warpage and high stability and [01:47:11] reliability [01:47:12] so this seamless splicing technology has [01:47:15] a double-sided [01:47:16] process and can realize a kind of a [01:47:19] seamless splicing for any sizes [01:47:22] and also micro ic or ltps [01:47:25] or oxide tft were actually now used here [01:47:29] to use as a direct driver and the fine [01:47:31] pitch can be realized [01:47:32] which is lower than one millimeter and [01:47:35] also in terms of the [01:47:37] very last thing in terms of packaging we [01:47:40] are having the black silicone plus the [01:47:42] transparent silicon as the [01:47:45] packaging technology in 2020 we launched [01:47:48] the 55 [01:47:49] inch kind of a product with a 1.8 [01:47:53] inch 0.9 pitch and also the super large [01:47:56] 162 inch product [01:48:01] excuse me and [01:48:05] also in 2020 we actually launched the [01:48:08] following mini led display products [01:48:11] and finally let me give you a summary so [01:48:14] for mini and micro led [01:48:16] so this technology has many advantages [01:48:20] and also they do have new applications [01:48:23] and this is actually regarded as the [01:48:26] technologies for the future display [01:48:28] but at the same time it is facing with a [01:48:31] lot of challenges [01:48:32] like chip processing pixel driving [01:48:35] circuit [01:48:35] color purity and garment or mass [01:48:37] transfer and inspection repair etc [01:48:39] we're still having a lot of challenges [01:48:41] to overcome and finally [01:48:43] we are more than willing to join hands [01:48:44] with everybody to really develop [01:48:47] the micro led and mini led and realize [01:48:49] industrialization [01:48:50] so much for my report thank you okay [01:48:54] thank you mr one is for for keeping the [01:48:57] time [01:48:58] is on time for the whole presentation [01:49:03] so we're at this we're open for the [01:49:06] questions [01:49:09] and i recall there was a question was [01:49:12] asked before [01:49:13] and jose was saying [01:49:17] can be that question can be answered by [01:49:19] the boe [01:49:20] who said do you remember which question [01:49:22] was [01:49:24] yes we have a question in the past from [01:49:26] heidelberg [01:49:27] instruments all the way from heidelberg [01:49:31] in germany [01:49:32] the question was for mass less [01:49:35] lithography for direct laser writing [01:49:39] do you see any applications or any added [01:49:42] value [01:49:42] in using it for manufacturing micro leds [01:49:57] sorry i may not know much about the [01:49:58] technology so you're talking about the [01:50:00] laser writing right [01:50:01] yes [01:50:06] you want to share the laser writing [01:50:11] in terms of the [01:50:14] high precision we have a very good [01:50:17] application but in terms of micro led [01:50:20] i don't see any application or potential [01:50:23] of application [01:50:24] of this technology [01:50:27] thank you very much i will make sure [01:50:30] that you are introduced to them to [01:50:31] discuss potential business [01:50:33] professor yang could you allow me to ask [01:50:35] another question [01:50:36] yeah go ahead i have another question [01:50:39] from my side [01:50:40] at the end of the presentation you [01:50:42] mentioned that you want to use [01:50:44] black glass silicone black silicone [01:50:48] glass [01:50:49] is there any other challenges for the [01:50:51] using of black [01:50:52] silicone glass and is the final price of [01:50:56] the product [01:50:56] affected [01:51:04] uh [01:51:06] in terms of the back frame there are a [01:51:09] lot of challenges [01:51:10] um of course if we don't do actually the [01:51:13] black [01:51:16] the contrast will be compromised [01:51:20] so if we do actually uh you know make [01:51:22] the black silicon [01:51:23] this is going to impact the overall [01:51:27] brightness so how to make the black [01:51:29] layer and also how thick it should be [01:51:32] and also how do we actually have an [01:51:35] overall design [01:51:35] and also the process design i think that [01:51:38] uh they're having a lot of [01:51:40] improvement to the display quality if we [01:51:42] do them well [01:51:43] and also the price and cost we have to [01:51:46] consider about the overall cost if we [01:51:48] want to promote the product so in terms [01:51:50] of the direction of low cost [01:51:53] the black gel or the kind of uh no [01:51:56] black picture as the major kind of a [01:51:59] solution [01:52:01] i think that they can help us drive down [01:52:03] the coast [01:52:04] even further i i agree [01:52:07] thank you for the great answer [01:52:10] i think we have a question from [01:52:15] andrews hoover from instrument system [01:52:19] mr hoovers can you ask your question [01:52:28] hello [01:52:38] i believe mr hubbards is no longer with [01:52:41] mrs hubert's by the way is no longer [01:52:42] with us but i would like to ask the [01:52:45] organizers to promote [01:52:47] chris skang from bessie all the way [01:52:50] from austria chris thank you very much [01:52:53] for being with us [01:52:54] what's on your mind [01:52:58] thank you and thank you for the great [01:52:59] presentation uh [01:53:01] in the presentation you mentioned that [01:53:03] your preferred method [01:53:05] for a die attach is laser transfer [01:53:09] and i wondered if you could comment on [01:53:11] what do you see the advantages [01:53:14] especially relative to other options [01:53:16] like [01:53:17] pad pad transfer and other methods [01:53:27] in terms of the advantage yes so laser [01:53:30] transfer is [01:53:31] adopted and also favored and also we can [01:53:33] realize a large area scanning [01:53:35] using laser transfer and for the panel [01:53:37] makers [01:53:38] because our cloud size are always very [01:53:42] big so from gen 4 to gen [01:53:46] 10 [01:53:49] only the laser transfer technology can [01:53:52] help us [01:53:52] to realize a super [01:53:56] large size plane scanning [01:54:00] and if we directly apply on the tft [01:54:03] panel laser transfer has [01:54:06] a lot of advantages but for [01:54:10] other transfer technologies i don't want [01:54:11] to say that they're bad [01:54:13] but i think not that good in terms of [01:54:15] application [01:54:16] and also for laser transfer technology [01:54:19] it also has its unique [01:54:20] issues for example as for how to [01:54:24] actually have a splicing of the [01:54:25] panel back panel and also some kind of [01:54:28] bonding technologies and adhesion [01:54:30] technologies etc [01:54:32] all issues need to be solved [01:54:39] thank you okay [01:54:42] and let's move on to the next [01:54:45] speaker and it's from plain nitride [01:54:48] mister following you [01:54:53] so his talk is development of the micro [01:54:55] led display and the future opportunities [01:55:14] yeah okay hi this is falcon from play [01:55:17] nitra [01:55:18] and i'm glad to have this opportunity to [01:55:22] share the [01:55:23] micro display development and future [01:55:27] opportunities [01:55:28] from play nitrile's point of view [01:55:34] so we know now we need a display there [01:55:38] and especially for this copy 19 [01:55:41] timing now displays everywhere but we [01:55:44] now [01:55:44] we need it to connect to people so [01:55:48] not only the like before this place kind [01:55:51] of application but [01:55:52] now it is like part of of our life [01:55:57] so if we see about the display's [01:56:01] history so starting from crt [01:56:04] and now moving to lcd [01:56:08] or oled and even to micro id [01:56:11] the reason why we need to have newer new [01:56:14] display [01:56:14] it's very simple we want the better [01:56:16] display [01:56:17] and we want it to we want to use the [01:56:20] display everywhere [01:56:21] not only in your life [01:56:24] your personal in life but also in a lot [01:56:28] of different applications [01:56:32] therefore nitrile world has some [01:56:35] achievement [01:56:35] about micro id display technologies [01:56:39] so here [01:56:44] samples what we demonstrated that is the [01:56:48] we call it pixel and matrix and this is [01:56:50] a tiling display [01:56:52] we have um 48 modules [01:56:56] come pounding together and you can see [01:56:58] from the left [01:56:59] left hand side that uh the one module is [01:57:02] very small and this is the best [01:57:04] micro id we have a unique technology [01:57:07] transfer [01:57:08] to the pcb and then we can easily to tie [01:57:12] in a much bigger screen so here this [01:57:14] example is 48 modules but of course we [01:57:17] can turn into [01:57:18] any bigger or any different shape [01:57:21] and comparing to the right hand side [01:57:23] this is lcd [01:57:25] we input the same video [01:57:28] and we can easily to see the better [01:57:31] contrast and better color and even the [01:57:36] it's much brighter and [01:57:39] of course we adjust to the lcd's best [01:57:42] performance we're not trying to [01:57:44] make it like lcd it looks very worse [01:57:48] however we of course lcd is good enough [01:57:50] for our life but [01:57:52] for our future we need a better display [01:57:54] so here you can easily to see [01:57:56] the difference for from micro id to lcd [01:58:04] and another case for micro id is [01:58:07] it can be flexible so we work with auo [01:58:11] in 2020 last year and [01:58:14] demonstrate a 9.4 inch flexible micro d [01:58:18] display [01:58:20] and this one you can see that it can be [01:58:22] either convex or [01:58:23] concave so the micro d display [01:58:27] even the display is microlitre itself [01:58:31] that that is rigid but it still [01:58:34] can be flexible since the microlitre [01:58:37] is very small so while you do the any [01:58:40] flexible bending [01:58:42] you won't bend the micro id itself [01:58:48] and of course the micro id there will be [01:58:50] a very [01:58:51] important feature that is to make the [01:58:53] transparent display [01:58:55] so in 2019 we work with tmr [01:58:58] and that we demonstrate a microarray [01:59:02] transparent display and this one we can [01:59:05] see that you can [01:59:06] see through the display and of course [01:59:09] the [01:59:10] border is very slim about [01:59:13] 0.8 millimeter wide width and [01:59:17] this very narrow border [01:59:20] there's no any friend required so [01:59:23] there's a lot of [01:59:24] applications especially for automotive [01:59:27] industries they are very interested in [01:59:29] this technology [01:59:31] and right hand side shows another [01:59:33] application is 1.25 [01:59:35] inch wearable display and with [01:59:39] wearable display micro id can help to [01:59:42] with a very high brightness and good [01:59:44] contrast so therefore while you have [01:59:46] outdoor goal for sports then [01:59:48] the micro id will be very good for you [01:59:51] to see [01:59:52] under the sunshine [01:59:57] so i think a lot of speakers already [02:00:00] introduced microarray this [02:00:01] uh what is micro id and what is micro d [02:00:04] display [02:00:05] but here i maybe i just found another [02:00:08] point to see to define the micro id so [02:00:11] the left hand side this is a led chip [02:00:14] and [02:00:14] there's including the packaging the [02:00:18] substrate and also the thinking layer [02:00:22] so if we want to make a micro id which [02:00:24] is much smaller from the original micro [02:00:27] edit packaging [02:00:27] so the first we remove the packaging and [02:00:30] then [02:00:30] we remove the substrate layer so only [02:00:33] remaining the [02:00:35] ap there which dipping there so it's [02:00:38] about [02:00:39] less than 10 micrometers thick so [02:00:42] of with this very thin layer so you have [02:00:45] to make it very small [02:00:47] so that's micro id and usually people [02:00:50] talking about mini eld [02:00:51] that's a theme pin there with the [02:00:54] substrate that's [02:00:55] the mini led case so [02:00:59] the size is kind of this definition but [02:01:02] we think the thickness will be more [02:01:05] accurate definition between linearity [02:01:08] and microsd [02:01:09] so this is one led chip [02:01:13] and the display that we need to make it [02:01:15] an array [02:01:16] or we call a matrix and the traditional [02:01:19] led chip you can see that [02:01:21] the this is very big so [02:01:24] we can make the display but the pitch [02:01:27] will be [02:01:29] wider so that means like we only like [02:01:32] led tv you [02:01:33] need to have a distance then you can see [02:01:36] beautiful thing otherwise you get [02:01:38] colored and [02:01:40] use a lot of that [02:01:44] so my micro advantage of people are [02:01:47] discussing is one of one perfect [02:01:50] thing to be lower [02:01:54] and also the high grinders is a very [02:01:56] important feature [02:01:57] of micro id [02:02:00] and the ultra high resolution which is [02:02:02] capable for [02:02:04] ar or hud applications [02:02:07] but this one we need to have the micro [02:02:10] id on [02:02:10] silicon back plan and then [02:02:14] flexible what i already showed it's [02:02:16] already proved we can be flexible [02:02:18] and fast response time means the led [02:02:21] trip the on off time is very fast [02:02:24] just like macro d and led is the same [02:02:26] it's a nano second scale [02:02:28] comparing to lcd that is a mini [02:02:31] mini second scale or older that is a [02:02:33] micrometer scale so [02:02:35] micro id of time is very fast [02:02:39] and of course that's an important things [02:02:42] the macro [02:02:42] these the stamina's l led we have very [02:02:46] good reliabilities [02:02:47] so comparing to oled that is [02:02:50] organic there are some constraints there [02:02:53] micro id will be good reliabilities [02:02:56] and especially this is a very very [02:02:59] important feature for automotive [02:03:02] applications [02:03:06] so comparing the structures from lcd [02:03:10] oled and micro [02:03:13] right we can see micro d structure it's [02:03:16] very simple you can [02:03:17] you just need a driving back plan and a [02:03:20] very small micro drip on top [02:03:22] then it's done comparing to lcd [02:03:26] that's a bulky structure that's [02:03:29] it's mature however with the the [02:03:32] structure is thick [02:03:33] so if we want go for flexible or [02:03:36] anything new [02:03:37] or transparent the lcd is unlikely to be [02:03:40] the solution all that is good but the [02:03:45] organic itself has some challenges so [02:03:47] therefore they need some of the [02:03:49] encapsulations [02:03:50] so get a little bit thicker it can be [02:03:52] flexible but [02:03:54] have some constraints there [02:03:59] and also if we one one use for the [02:04:02] transparent display [02:04:04] applications from lcd the structure [02:04:08] is bulky and of course that the color [02:04:11] filters [02:04:13] tricks unlikely to be transparent [02:04:17] and oled is see some oled [02:04:20] tvs transparent tv in the market however [02:04:23] you can [02:04:24] find transparent not very bright [02:04:27] the reason is only material itself has [02:04:30] for a lifetime [02:04:34] so you need to consider brightness [02:04:37] lifetime and the transparent [02:04:39] you need to find the balance so [02:04:41] therefore that's a [02:04:42] current oled tv it's transparent [02:04:46] but not so bright and micro id the trip [02:04:51] size is very small [02:04:52] so most of area can be transparent so we [02:04:55] can get high transparency [02:04:57] and also chips itself we don't have any [02:05:01] patterns so it's easy to make a high [02:05:04] transparency and high brightness [02:05:06] transparent display and that's a very [02:05:10] important [02:05:10] for for uni how to how can we have [02:05:14] high brightness high transparency and [02:05:16] also excellent reliability [02:05:18] display for that's uh these three [02:05:20] features [02:05:21] are very important to make a transparent [02:05:23] display especially for [02:05:25] automotive industry [02:05:28] so here just end shows and [02:05:32] feature or our target that's [02:05:35] for everywhere in your windshield your [02:05:37] side window your [02:05:38] dashboard your cid or back mirror [02:05:41] everywhere in the car [02:05:42] there will be that can be used by micro [02:05:45] id [02:05:46] technology [02:05:51] so how to realize micro led display the [02:05:54] first we need uh [02:05:55] to feature we need very small leds [02:05:59] because that can be the smaller leds [02:06:02] means [02:06:03] it can be lower cost but the very small [02:06:06] leds has challenged [02:06:08] to have need to have very good [02:06:10] efficiency [02:06:11] and also this this is a display so we [02:06:14] need to have every chip is [02:06:16] similar to each other so these are the [02:06:20] targets to make a smaller leds [02:06:24] and another things of course we have [02:06:26] need to have [02:06:27] two per mesh transfer solutions and [02:06:32] with these two solutions then the [02:06:35] if we can solve these two questions then [02:06:38] the micro id display can be very cheap [02:06:41] in the future [02:06:43] so first for mass transfer i think a lot [02:06:46] of speakers already introduced [02:06:47] and here i shall share you some [02:06:50] animations to [02:06:51] understand the mess transfer ideas and [02:06:54] this is for [02:06:55] based on the stamping process so we have [02:06:58] a background and now we have prepared [02:07:00] a wafer and micro d chip already [02:07:04] arranged then that can feed to the [02:07:07] target panels and then we have a stamp [02:07:10] here [02:07:12] and pick up the locations to for the [02:07:15] backplane [02:07:16] so then we pick up the micro id [02:07:19] chips and to the back and then [02:07:23] you present on the locations we [02:07:27] need to have and then bounding the micro [02:07:30] id chip on [02:07:31] the back plan and move back so this is a [02:07:35] typical cycle for [02:07:36] stamping and this process can be very [02:07:39] very fast [02:07:40] so for plant nitrite solution we use [02:07:43] rgb3 colors [02:07:45] so after red colors then we do the green [02:07:48] colors [02:07:48] mass transfer and then we do the blue [02:07:52] colors match transfer [02:07:56] so after the transfer if everything's [02:07:58] perfect [02:07:59] then we have a perfect screen however [02:08:03] that's unlikely [02:08:06] defects are avoidable [02:08:10] one defect coming from the micro led [02:08:13] chip [02:08:13] itself from wafer because there's [02:08:15] particles [02:08:16] so it's very difficult to have zero [02:08:18] particles environment [02:08:20] and another of course while you do the [02:08:22] mesh transfer there might be some of the [02:08:24] defect there if we count the best uh the [02:08:28] current [02:08:29] conditions then for a full hd screen [02:08:32] that [02:08:32] we have 30 000 meg pixels and [02:08:36] this is unlikely to be repaired [02:08:39] because the cost is too high so we need [02:08:43] to have some of [02:08:44] the solutions we call like a mess [02:08:48] like mesh transfer so we need like [02:08:50] something for [02:08:51] mass repair and here is the [02:08:54] nitrite solution so we have the same [02:08:57] thing [02:08:58] a wafer or arranged and then we [02:09:01] the thing different is we have a special [02:09:03] stamp [02:09:04] then we can pick up only the chips [02:09:07] which matching to the debate locations [02:09:10] and then [02:09:11] transfer to the target back plan [02:09:14] and then move back so you can see here [02:09:17] the default location we have additional [02:09:19] micro d chips [02:09:21] next to it and then it can return to the [02:09:25] the screen so one [02:09:28] so after one color and then we do the [02:09:31] another color [02:09:33] then that's the repair solution and here [02:09:36] we can see here [02:09:37] the there's we [02:09:41] people were asking if there's another [02:09:43] enough space to put a lot [02:09:44] of microalready chips there then you can [02:09:46] see that microchip [02:09:48] is very small so you can easily to put a [02:09:51] lot of microsd chips there [02:09:53] so this idea there's no any problem [02:09:58] so here's an example so we do the repair [02:10:01] then [02:10:02] it can be become good uh [02:10:05] if there are any cases there's something [02:10:07] missing then [02:10:09] we can just to pick and place just [02:10:11] because the [02:10:12] defect pic diva pixel is very limited [02:10:16] and that can save a lot of a lot of cost [02:10:22] so from prototype to manufacturing we do [02:10:25] a lot of things [02:10:26] size designs and efficiency improvement [02:10:29] the waiver defects and uniformities [02:10:31] improvement [02:10:32] mass transfer mesh repair massive [02:10:34] inspection lots of things [02:10:36] the key is the cost so how can we reduce [02:10:39] the cost [02:10:40] that's the key for micro id to become [02:10:43] commercialized to everyone [02:10:47] okay so for the very end just briefly [02:10:50] introduce our company we found in 2014 [02:10:52] and located in [02:10:54] taiwan shinjuku spanx park and we [02:10:56] already have a production lights [02:10:58] producing micro id chips and display [02:11:01] and we got several awards from different [02:11:04] locations [02:11:05] and for per nitride our core [02:11:08] technologies [02:11:09] epi taxi micro digital processing and [02:11:12] include from mass transfer inspection [02:11:14] testing and to mass repair [02:11:16] and the others will work with our [02:11:18] partner just uh what i showed before [02:11:20] like [02:11:21] with aw or with tmr together [02:11:25] and thank you very much for to [02:11:28] for my presentations and [02:11:32] wish everyone can be held and use the [02:11:35] display to win [02:11:36] at this time use the display to connect [02:11:38] people with each other [02:11:40] thank you thank you very much [02:11:53] for a great presentation we have some [02:11:55] questions in the room [02:11:56] the first one is coming from one one of [02:11:59] the [02:12:00] great companies with huge future that we [02:12:03] have in europe [02:12:04] we go to warsaw and we go to the fento [02:12:06] second laser company [02:12:07] fluence darius spirat chesh [02:12:11] could you ask the question you have for [02:12:13] play nitride [02:12:16] uh hi hi nice to meet you and thank you [02:12:18] very much for your presentation [02:12:20] uh so my question is simple i know you [02:12:22] like to focus on very very small but [02:12:24] [Music] [02:12:27] but on the first slide he said about [02:12:29] this [02:12:32] panels you have the modules that you [02:12:35] have a screen of [02:12:36] consisting of 48 [02:12:39] modules and my question is how many [02:12:41] modules can you combine to make it [02:12:43] bigger and what's the limit [02:12:45] there well [02:12:48] there's no actually there's no limit [02:12:50] just depends on the module number so we [02:12:52] can [02:12:53] now our demo is around 37 inch but then [02:12:56] we can have bigger 175 [02:12:58] and if we have more modules 150 [02:13:02] 200 anything or any ship you like [02:13:06] so the titling the the most beautiful [02:13:08] things for titling is that [02:13:10] you can tell to any display size or even [02:13:13] aspect ratio based on your requirement [02:13:15] or even said [02:13:16] tell me your living room and we can [02:13:20] cover all of your walls [02:13:23] okay anything for you [02:13:28] no question just just uh of of the [02:13:31] pixels [02:13:32] uh [02:13:36] of hundred thousand hours gradation [02:13:41] that is we are having some problem with [02:13:43] the connect so [02:13:45] if you wouldn't write your question in [02:13:47] the chat falcon will answer it [02:13:49] the second question is coming from my r [02:13:52] d manager so [02:13:54] let's listen to anna gonzalez dr [02:13:56] gonzalez [02:13:57] what's on your mind thank you for giving [02:14:00] to me the word and [02:14:02] thank you for the presentation it was [02:14:03] great i guess my question was about [02:14:05] what is the limitation in order to [02:14:07] further reduce the time of analysis and [02:14:10] this preparation procedure of your leds [02:14:13] this is related to the speed of [02:14:16] automation [02:14:17] of the automation tools or it is more [02:14:19] related to technical issues or [02:14:22] in order to to reduce and to reduce the [02:14:25] cost as well [02:14:28] sorry so my review of questions so [02:14:30] well sorry so my review of questions so [02:14:30] you're asking about the [02:14:32] the process is automatic or [02:14:34] non-automatic and then [02:14:35] what is the limiting factor or making [02:14:38] the repair part a faster [02:14:42] or cheaper what is the limitation is it [02:14:45] the speed of the machines [02:14:49] well i think the repair the the best [02:14:52] thing is if you can make the transfer [02:14:55] perfect then there's no any repair [02:14:58] required so that's the target [02:15:00] however if you need to repair then it [02:15:02] depends on [02:15:04] the defect counts you have if like for [02:15:07] example i [02:15:08] uh indicate if you have 30 000 [02:15:11] defects then that means you need to find [02:15:13] something can repair very fast and [02:15:15] with a lot of uh defect quantum [02:15:19] repair a lot of different quantity at [02:15:21] the same time [02:15:22] so then for example we make some of the [02:15:25] mess repair technology [02:15:27] if the defect number is very limited [02:15:30] like 10 20 then maybe we can use peak in [02:15:34] place to repair [02:15:36] so the repair technology really depends [02:15:38] on the [02:15:39] first pass yield we and [02:15:43] the final goal is we want to need to [02:15:45] find the cheaper solutions for repair [02:15:47] because the repair won't make them [02:15:51] make the display to be perfect but you [02:15:53] cannot generate [02:15:54] the real production anyway [02:15:58] i think falcon you guys the answer that [02:16:00] anna was dreaming about she's going to [02:16:02] connect you with [02:16:03] companies that can that will want to [02:16:06] help you on this [02:16:07] i would like to go next to chris from [02:16:10] bessie [02:16:11] chris what's on your mind [02:16:15] yeah i think the last answer kind of [02:16:17] answered part of my question but [02:16:19] my question is related to the repair [02:16:21] process so [02:16:23] it's a very innovative process i'm just [02:16:25] wondering do you have to dedicate [02:16:28] wafers to for just the repair process [02:16:31] because you're picking [02:16:33] a selective die [02:16:36] from the wafer which would render the [02:16:38] wafer unusable for [02:16:40] for a mass transfer process and then is [02:16:43] there a trade-off [02:16:44] in terms of yield between um this method [02:16:47] of repair versus [02:16:48] picking individual dye because of the [02:16:52] the uh waste of the wafer [02:16:56] yes so of course we can by this [02:16:59] condition we cannot 100 [02:17:00] to utilize all the waivers uh wait all [02:17:03] the trips from wafer [02:17:05] however the defense pattern will be [02:17:07] different [02:17:08] so it's very easy just by some of the [02:17:11] algorithms [02:17:12] or we use ai to calculate how to be [02:17:16] how can we pick up the uh [02:17:19] choose this uh how where the location to [02:17:22] pick up the microarray chips for repair [02:17:24] and this one i think we can [02:17:27] we use the one wafer to repair a lot of [02:17:29] panels and that can [02:17:31] we try to utilize to use most of the led [02:17:35] chips on top [02:17:37] there are many many many questions in [02:17:39] the chat but professor yang is back with [02:17:41] us [02:17:42] professor jan this is your suggestion [02:17:45] sorry my computer has some problem they [02:17:48] just quit me on [02:17:49] so i have to reboot the computer okay so [02:17:52] i think we're done for the for the [02:17:55] questions right [02:17:57] yes okay let's let's move to the next [02:18:00] speaker [02:18:01] and we have very honestly have another [02:18:05] one is from i think from [02:18:09] taiwan right oh no i'm sorry okay [02:18:12] and we will have uh [02:18:15] mr thinking from kemah so [02:18:18] he will share his talk [02:18:22] the opportunity and the challenge of the [02:18:23] microair display for automobile [02:18:26] applications [02:18:30] so mr dean is the director of the ind [02:18:34] in camera [02:19:04] hey [02:19:14] [Music] [02:19:46] d [02:20:00] okay [02:20:42] foreign [02:20:58] [Music] [02:21:24] foreign [02:22:01] [Music] [02:22:05] so there are a lot of big area of [02:22:07] transparent area [02:22:09] about 100 ppi [02:22:12] oled actually can make 20 transparency [02:22:17] but for micro led the transparency can [02:22:19] be above 60 [02:22:21] also there is another type of uh [02:22:25] advantage which is borderless so for lcd [02:22:28] because it needed to [02:22:29] actually have the same um sides or [02:22:32] frame and also for oled because this is [02:22:35] organic [02:22:36] material oriented so it has to have a [02:22:39] certain kind of a special [02:22:40] packaging technology and tfv packaging [02:22:43] for example for flexible [02:22:45] but for micro led as we already stated [02:22:48] that [02:22:48] this is uh also a very good uh resilient [02:22:51] over the [02:22:52] very strict requirement of the [02:22:54] environment so it does not need to have [02:22:55] a very strict [02:22:56] kind of a packaging and also it can have [02:22:59] a seamless [02:23:00] splicing and also can be conducted in a [02:23:03] borderless way [02:23:05] we can make a micro led as a [02:23:07] standardized module [02:23:08] so that we can tailor-made to the [02:23:11] customer [02:23:11] needs and just now i have already said [02:23:14] that no matter we are talking about [02:23:15] performances but also in terms of [02:23:17] structure we do have [02:23:18] other advantages so currently speaking [02:23:21] is it possible [02:23:22] for us to really you know have a full [02:23:25] deck [02:23:26] development in all different kinds of [02:23:27] downstream applications so now in terms [02:23:29] of the cost i don't think that this [02:23:31] can be further elaborated or extended to [02:23:33] more applications in the short run [02:23:35] and next let's take a look at the [02:23:37] analysis of the [02:23:38] cost structure for oled and lcd [02:23:43] their cost is a proportionally related [02:23:46] and corresponding to this display size [02:23:49] but micro led has this cost related to [02:23:52] resolution [02:23:53] so for example if [02:23:58] for wk like hd it may need to have a 10 [02:24:02] million more of the drive or ics [02:24:06] so actually that is to say we're going [02:24:08] to have exponential growth [02:24:10] for the micro the number [02:24:13] if the resolution is increased to a very [02:24:15] high level and also [02:24:17] while the same time with improving [02:24:18] resolution yield [02:24:20] it's not going to actually be [02:24:22] compromised but for [02:24:23] actually mike that that was for lcd and [02:24:25] all that but for buy credit [02:24:27] actually the kind of a year will be [02:24:29] impacted and also you know that [02:24:31] resolution of course is being improved [02:24:33] now i'm talking about tv from 2k 4k to [02:24:36] 8k [02:24:37] and also we're going to have at least [02:24:39] like 100 million micro leds [02:24:42] needed for the large sized panel and [02:24:45] display [02:24:46] so i think that technology wise and also [02:24:48] application wise micro led is a very [02:24:50] difficult uh [02:24:51] technology so what types of applications [02:24:54] are there that are suitable [02:24:56] for micro led first and now it should [02:24:58] have two features first [02:25:01] we should have if you want to have a [02:25:03] super performance of display [02:25:05] and then you choose micro led this is [02:25:07] something cannot be achieved by oled or [02:25:09] lcd and second not that price sensitive [02:25:12] in like kind of a higher niche market [02:25:14] for example over 100 inch [02:25:17] super large splicing screen [02:25:21] you can use micro led and then overall [02:25:24] speaking we have been seeing all the [02:25:26] different application fields in display [02:25:28] in a consumer electronics area talking [02:25:30] about cost and technology difficulties [02:25:33] there are a lot of barriers so those [02:25:36] areas are automotive [02:25:38] transparent display and splicing display [02:25:42] so we can apply fully the micro id and [02:25:45] also another one is for [02:25:46] variables wearable itself is small in [02:25:49] size [02:25:50] and also low resolution so technology [02:25:52] barrier is very low [02:25:56] assume so this is price sensitive [02:25:59] area and second in terms of power [02:26:01] consumption [02:26:03] so we need to solve the consumption [02:26:05] current speaking power consumption for [02:26:07] market led display is still [02:26:09] very high and for our apple watch [02:26:12] the latest generation of apple watch [02:26:17] it's already using ltpo technology and [02:26:20] can have [02:26:20] you know one house drive but for micro [02:26:23] led in order to have one hertz [02:26:25] drive it is still difficult in terms of [02:26:28] technologies [02:26:31] so when i was introducing to you about [02:26:34] the [02:26:34] application uh field and uh automotive [02:26:38] is one of the major areas of [02:26:39] application of micro editing and also on [02:26:42] the other hand [02:26:42] tiana as a company had a lot of [02:26:46] breakthroughs and progress in this [02:26:47] particular application [02:26:49] and now in the automotive application we [02:26:52] have already realized number one market [02:26:54] every five vehicles there was a one [02:26:58] vehicle that used the tmr display and [02:27:00] also automotive display [02:27:02] is also one of the strategic directions [02:27:04] of tiana [02:27:05] so in terms of the micro edit the uh [02:27:08] application in the future [02:27:10] we are prioritizing you know automotive [02:27:13] application [02:27:14] place on three major technology pathway [02:27:18] the first one is transparent display as [02:27:20] i already introduced to you that [02:27:21] and in the future we can actually make a [02:27:23] flexible transparent display [02:27:26] and second part is splicing display and [02:27:29] for splicing display [02:27:30] there are some kind of uh you know tech [02:27:32] solutions that [02:27:33] you know some things inside the vehicle [02:27:37] so with a very good feature of [02:27:41] seamless splicing we can actually [02:27:42] realize the telemate needs of [02:27:44] the drivers and also finally flexible [02:27:47] display [02:27:47] and first a flexible micro a comparing [02:27:51] with [02:27:51] oled it has a high flexibility high [02:27:54] brightness and long lifetime [02:27:56] and comparing lcd in terms of hdr [02:28:00] hdr high quality of the picture lcd is [02:28:03] still disadvantageous comparing with [02:28:05] micro led [02:28:07] and then just now i was already talking [02:28:09] to you about the future applications of [02:28:10] micro led [02:28:12] and now what i'm going to tell you is [02:28:14] challenge of micro led [02:28:16] so first talking about fp drive [02:28:19] af micro led there are three parts the [02:28:22] first is drive [02:28:23] ic or display ic how to make the ic as [02:28:25] small as possible [02:28:27] but at the same time the lighting kind [02:28:29] of efficiency can be [02:28:30] very high and also some kind of a [02:28:33] lightness and also brightness as well as [02:28:35] the color quality they need to be [02:28:38] further improved [02:28:39] and second of all how to realize a [02:28:41] borderless kind of uh [02:28:43] application and also the thermal [02:28:49] spray and also thermal stability [02:28:52] and also the mass transfer this is a [02:28:54] core technology [02:28:55] of the micro led how can we transfer as [02:28:58] many [02:28:59] uh micro ideas as possible in the [02:29:00] shortest period of time and also [02:29:02] realize a 100 yield of transfer this is [02:29:05] something that we have to overcome [02:29:07] in specific in the future and then let's [02:29:10] talk to you [02:29:10] about some of the challenges that we [02:29:12] have been encountering during the [02:29:14] application and let me give you some [02:29:15] examples the first is uniformity [02:29:18] so as you may see here on this slide [02:29:22] so the further away from ic the darker [02:29:25] it is [02:29:26] and also we're going to see some kind of [02:29:31] blocks here with a very low uniformity [02:29:34] because of three reasons the first is [02:29:36] the chip itself [02:29:37] the uneven distribution of brightness [02:29:40] and also the color [02:29:41] and second is caused by the back plane [02:29:44] the [02:29:45] drive current of micro led is two times [02:29:48] larger in terms of exponential [02:29:50] comparison with lcd so let's just say [02:29:52] why the larger [02:29:54] or the further away from lcd the further [02:29:57] away from the display [02:29:58] the darker it is and also there is a [02:30:00] kind of a mass transfer on evenness so [02:30:02] we can actually optimize the drive [02:30:05] and also optimize the algorithm etc to [02:30:08] compensate [02:30:10] i mean for the backlink and the third [02:30:12] part is for the mass transfer [02:30:14] and also because during the transfer the [02:30:17] pressure of the temperature [02:30:20] should be very uniform so if we can [02:30:24] really kind of reduce the difference and [02:30:27] we're going to have a very good [02:30:28] improvement [02:30:29] of the performance and uniformity [02:30:31] another part is power consumption [02:30:33] the three challenges are first of all [02:30:35] led efficiency [02:30:36] so the efficiency is lowered [02:30:40] if the chip size is smaller so we have [02:30:43] improved the efficiency [02:30:44] and second is for drive so tft itself [02:30:48] will consume certain power [02:30:49] by itself and also this is something [02:30:51] that we have to solve as a panel maker [02:30:53] we do have certain technology in actual [02:30:56] reducing the tft voltage [02:30:58] and third is drive mode so in terms of [02:31:01] microadded [02:31:02] you know comparing with oled for oled [02:31:04] normally it's [02:31:05] like the nano amp kind of a drive but in [02:31:08] a super low current [02:31:09] because of the low efficiency the [02:31:11] brightness or lighting efficiency is [02:31:13] very low for micro led [02:31:14] so we need to have a very good drive [02:31:16] under a very [02:31:17] dense current and i'm going to give [02:31:20] introduction about this later [02:31:22] and also second how to reduce the power [02:31:24] consumption [02:31:25] apart from the improvement of the [02:31:28] lighting um efficiency of the [02:31:31] microcredit itself [02:31:33] we could also think about other ways [02:31:36] let me take a look at the left chart for [02:31:40] oled [02:31:42] the brightness is the highest it is [02:31:45] between 0 to 70 degree [02:31:48] the brightness efficiency is the same in [02:31:51] between 0 and 70. [02:31:53] so we can have some kind of a design of [02:31:54] the back plane [02:31:56] structure on the right we can have two [02:31:59] reflection walls design and also [02:32:00] two reflection layers on the bottom [02:32:04] so that by using efficiently the light [02:32:08] to really reduce the power consumption [02:32:11] and next we're talking about the drive [02:32:14] mode [02:32:14] and left chart was uh something about [02:32:18] the pwm kind of a method and this is [02:32:21] still the traditional [02:32:23] drive mode of the led and lcd [02:32:27] and then the kind of a drive current is [02:32:29] very high and density is very high [02:32:31] so it can make full play the high [02:32:34] brightness [02:32:34] of the micro lcd but actually [02:32:38] the resolution itself cannot be [02:32:39] optimized and also on the bottom chart [02:32:42] we're talking about the traditional oled [02:32:44] drive mode which is using the frequency [02:32:47] adjustment to drive the different [02:32:50] current [02:32:51] and then that particular drive current [02:32:53] is a nano amp [02:32:54] level so normally there is no way for us [02:32:58] to actually make the [02:32:59] brightness high for micro led [02:33:03] and also in the future we're going to [02:33:05] combine [02:33:06] pwm with pam as the hybrid model [02:33:10] for the drive so that is a hybrid mode [02:33:12] of [02:33:13] pm plus pwm and with this particular [02:33:16] frequency adjustment combining with the [02:33:18] advantage of these two [02:33:20] um actually this should be the most um [02:33:24] usable kind of a drive mode for the [02:33:26] micro led [02:33:28] chip there's another challenge [02:33:31] which is about the temperature and [02:33:34] stability [02:33:35] under the high temperature the [02:33:37] brightness efficiency of micro led will [02:33:40] be changed especially the red chip [02:33:42] on the 85 degrees c [02:33:46] it can only have 25 of the performance [02:33:48] comparing with the avian temperature [02:33:51] so if we rise the temperature even [02:33:53] higher [02:33:54] the color will be changing all the way [02:33:56] to green [02:33:58] so fundamentally we need to further has [02:34:01] something to do with the micro led chip [02:34:04] and for the red chip we have to make the [02:34:06] temperature performance well [02:34:08] and also on the other hand we can have [02:34:09] some temperature compensation to [02:34:11] improve or just like the [02:34:14] right button you could see we could [02:34:18] use the blue chips plus the wavelength [02:34:22] transformation to achieve the full color [02:34:25] of course for the overall transfer [02:34:29] that is beneficial as well [02:34:32] and now let's look at the challenges of [02:34:35] transfer [02:34:36] here on the table i list six mainstream [02:34:39] transfer [02:34:40] methods up to now the most most mature [02:34:43] one is due to [02:34:44] stamp methods most of the prototypes [02:34:49] are produced in this way however [02:34:53] for the stamp its efficiency and speed [02:34:56] are relatively lower so for the mass [02:35:00] production that is not efficient [02:35:04] as for the future just like many [02:35:07] speakers have mentioned [02:35:09] we are more interested [02:35:12] and see confident in the last transfer [02:35:18] especially for large volume or large [02:35:21] size [02:35:22] the laser transfer is due on the [02:35:23] research so we need to make further [02:35:25] breakthrough [02:35:26] of course the yield of transfer is very [02:35:28] important [02:35:30] for fghd resolution if the yield [02:35:33] is 99.99 then still there are [02:35:37] over 600 defects even if you could [02:35:39] achieve 99.9999 [02:35:42] yield still there are seven defects [02:35:45] to repair of course it is necessary [02:35:48] but in current stage especially for the [02:35:51] medium to short time [02:35:52] if they are too high then [02:35:55] those repetitive uh those redemptive [02:35:59] repair is more appropriate just like [02:36:01] previous speaker mentioned [02:36:03] as for the future if the yield could be [02:36:06] very hard [02:36:08] we do think the single point [02:36:12] inspection and repair that will be more [02:36:15] efficient [02:36:16] and cost effective but of course it's [02:36:18] more challenging so we need to make [02:36:20] further breakthrough in the future [02:36:22] and i'd like to turn to the development [02:36:25] progress of [02:36:26] tiana in display in automotive area [02:36:30] one is the transparent display as other [02:36:32] speakers have mentioned we have the [02:36:36] in the world that is the ultra [02:36:39] transparent [02:36:40] 7.56 display we have won the sid [02:36:43] award and the second product on the show [02:36:47] was the flexible display also around [02:36:50] 7.56 [02:36:51] inch we show the head of the robot [02:36:55] with 50 millimeter bending radius and we [02:36:58] could reduce the radius [02:37:00] further that is because of our flexible [02:37:02] technology [02:37:04] so through the flexible micro led [02:37:07] we could make breakthrough [02:37:10] so that in the future there could be [02:37:12] more applications [02:37:14] in the cars to make it more beautiful in [02:37:16] design [02:37:17] on the right also the latest one is the [02:37:20] 5.04 [02:37:21] spliced display for the [02:37:24] frame it is less the border is less than [02:37:28] 0.03 millimeter very very [02:37:31] thin you could barely see it and just [02:37:34] like [02:37:34] you could see from the right we [02:37:38] slice into an abnormal shape with [02:37:41] four pieces and we could also piece [02:37:44] into a very long display so that will be [02:37:47] very appropriate [02:37:48] for the onboard display in the car [02:37:51] and finally for tiana [02:37:55] actually in micro led display we have [02:37:58] had many years of development [02:38:00] from the beginning of 2008 till now [02:38:03] and we already transformed from the [02:38:06] concept [02:38:07] to prototype and now it shows the micro [02:38:10] led technology [02:38:11] is appropriate and that will be other [02:38:14] promising display technology in the [02:38:16] future [02:38:16] but if we want to achieve mass [02:38:18] production but like i said there are [02:38:20] many challenges we need to overcome [02:38:22] so in the future i hope those from [02:38:25] chips design equipment etc we hope we [02:38:29] could work with all of these partners [02:38:31] so together we could make the technology [02:38:33] more mature to be mass produced that is [02:38:35] all from me thank you [02:38:36] okay thank you for the excellent [02:38:40] presentation and now we're open for the [02:38:43] questions [02:38:44] i think jose you have the first question [02:38:46] right [02:38:48] well you know professor yang i always [02:38:51] always have questions [02:38:53] but you know my my question here [02:38:56] is is very simple you at some point [02:39:00] to increase the efficiency you added a [02:39:02] reflection layer [02:39:04] directly on the top of the substrate so [02:39:06] i'm worried are there any [02:39:09] thermal expansion problems for these two [02:39:22] layers [02:39:26] because of the temperature it might be [02:39:28] affected [02:39:29] maybe the temperature would [02:39:32] lead to mismatch the [02:39:36] coefficient of thermal expansion is very [02:39:39] different [02:39:39] between the reflection layer and the [02:39:41] silicon substrate [02:39:43] so i'm wondering if there is a problem [02:39:51] up till now according to our test it is [02:39:53] okay there is no [02:39:54] specific issue that draws attention but [02:39:57] at the high temperature as you could see [02:40:00] the red reduces sharp play that is the [02:40:02] issue [02:40:04] thank you okay [02:40:08] we we have a family [02:40:15] from terraces [02:40:25] you can ask your questions or i can read [02:40:30] your question [02:40:36] okay the question was what will be the [02:40:40] mainstream [02:40:40] interconnect material between the dye [02:40:43] and the substrate [02:40:45] after mass transfer [02:40:55] well this concerns many technical [02:40:58] details that i [02:40:59] could not disclose sorry [02:41:03] okay steve you want to ask the question [02:41:07] by yourself [02:41:23] yeah i think the question was [02:41:26] is there any head of a display [02:41:29] application [02:41:38] well up till now we are negotiating with [02:41:42] the [02:41:42] oems because many auto companies are [02:41:45] interested in transparent display [02:41:47] so we are seeing if there is further [02:41:50] possibility [02:41:51] of development for others [02:41:55] you know i cannot disclose sorry for [02:41:56] that [02:42:01] okay we have one more [02:42:07] from ineo autonomy [02:42:12] is it possible to transfer the color [02:42:14] conversion filter over the blue [02:42:16] micro led [02:42:21] in your slide 16. [02:42:35] we already did that but still we [02:42:38] would used to separate layers and then [02:42:42] put them together [02:42:45] okay i think [02:42:48] we have to move on and thanks for the [02:42:50] speaker again [02:42:52] okay so now let's move the [02:42:56] next speaker uh igen chain [02:43:00] from source port [02:43:06] hello [02:43:09] can you hey mr chan can you [02:43:13] share the screen uh yeah i'm trying [02:43:20] oh [02:43:24] [Music] [02:43:28] okay [02:43:32] uh hello i want to share my experience [02:43:35] about the micro id mass inspection [02:43:44] okay i want to start from a simple [02:43:46] problem [02:43:47] why micro led is so special [02:43:50] i think it's because the size when size [02:43:53] is getting smaller and smaller today we [02:43:56] have microad [02:43:57] actually some research groups [02:44:00] have announced the idea about nano led [02:44:08] so smaller size princess large numbers [02:44:11] and large numbers brings us large many [02:44:15] possibilities [02:44:16] so it will become great applications [02:44:21] so i think today when we talk about [02:44:24] uh micro ed supplications [02:44:28] uh i think we are not [02:44:31] only talking about display [02:44:34] because uh maybe we could [02:44:38] we could talk about the lighting the [02:44:41] optical communication [02:44:43] the biomedical applications or the mass [02:44:46] class lithography or more other [02:44:48] applications [02:44:50] actually i think the right problem we [02:44:52] should ask [02:44:53] is not about how good the micro led tv [02:44:56] can be [02:44:58] actually in physics we should ask [02:45:01] how to use median programmable light [02:45:04] source [02:45:05] in a small area in the history of optics [02:45:08] this is the first [02:45:10] chance we have this kind of [02:45:13] optical device so [02:45:16] all the difference comes from the size [02:45:18] the smaller size [02:45:21] bring us more opportunities and of [02:45:24] course more challenges [02:45:29] so what is the challenges in inspection [02:45:32] there are three typical methods used to [02:45:35] identify the quality of led [02:45:38] first the pl spectrum that can give us [02:45:40] the material properties [02:45:43] second the el spectrum it will give [02:45:46] us the device properties and sometimes [02:45:49] the information of the context and [02:45:53] second [02:45:54] the electrical properties the iv curve [02:45:58] will give us a detail of contact [02:46:00] condition [02:46:03] to do this kind of measurement [02:46:06] there are four basic parts for the [02:46:08] inspection [02:46:10] first the probe we use the probe to [02:46:12] light up [02:46:13] the led second the smu [02:46:17] we use the smu to measure the electrical [02:46:20] properties [02:46:22] third the light source will use it to [02:46:24] light to excite the pl spectrum [02:46:29] third the most important things we use [02:46:31] the photo detector to get the luminance [02:46:33] from the micro led [02:46:37] and when size getting smaller and [02:46:39] smaller uh [02:46:41] what kind of problems will happen the [02:46:44] mini id actually [02:46:46] seems still fine but when things go to [02:46:50] micro ed the led sizes the led size is [02:46:54] too small [02:46:55] so the probe cannot [02:46:58] uh cannot probe the [02:47:02] led correctly [02:47:06] have uh some words about the micro and [02:47:09] nano probe [02:47:10] but i know some other teams in taiwan [02:47:14] they try to change their mind why not [02:47:17] use the back plane [02:47:18] to light up the micro led [02:47:22] and if the backplane can measure the [02:47:25] electrical properties at the same time [02:47:28] it will be a great platform for the [02:47:31] micro led inspection [02:47:34] so there are so many talented teams [02:47:38] here to working on the probe working on [02:47:41] the electrical measurements [02:47:43] but what about the camera actually in [02:47:46] optics [02:47:48] every kind of size size [02:47:51] variation is all about resolution [02:47:55] so what will be the problems when the [02:47:58] size getting smaller [02:48:02] when your microwave gets smaller and [02:48:04] smaller [02:48:07] you will find out that the [02:48:11] light go to your detector will be mixed [02:48:15] so actually with the small micro led [02:48:18] size [02:48:20] we cannot identify each led's optical [02:48:23] properties [02:48:24] so we need better spatial resolution to [02:48:27] do the optical inspection [02:48:30] if we have like 10 micrometer 5 [02:48:32] micrometer or 1 micrometer microad in [02:48:35] the future [02:48:36] or in the future nano led it's the [02:48:39] optical problems [02:48:43] so i want to introduce you the southport [02:48:45] jmet system [02:48:48] we integrate the pl raman image [02:48:51] and the pio rama spectrum and also the [02:48:54] trpo [02:48:56] spectrum and all the eo rage [02:48:59] analyzing algorithms with the micron [02:49:03] spatial [02:49:04] resolution and sub nanometer wavelength [02:49:07] resolution [02:49:08] in one system and this system has been [02:49:12] widely used [02:49:13] in the 2d material inspection the [02:49:16] provost guy inspection [02:49:18] and also the content dot and content [02:49:21] technology the single [02:49:23] photon emission inspection [02:49:27] so what can we do for micro ed here [02:49:30] for example after trip processing [02:49:33] we will have maybe 10 million micro led [02:49:36] on the way first [02:49:39] in this is in our system we can get high [02:49:42] resolution pr image [02:49:44] on whole 4 inch wafer in 10 minutes at [02:49:47] this stage [02:49:48] defects and era can be identified [02:49:52] for example if you if you zoom in this [02:49:54] data you will see the defect [02:49:56] you will see what kind uh what area the [02:50:00] pure spectrum is not uniform or what [02:50:03] micro led [02:50:04] is cannot light up with laser [02:50:09] if you zoom in again you can see every [02:50:13] pl spectrum and every pl image [02:50:16] of each micro led can be measured [02:50:20] if you keep doing it because our [02:50:23] resolution is really good with the micro [02:50:25] spatial resolution [02:50:27] so the pl spectrum of each micro led can [02:50:30] be clearly measured [02:50:33] so it's a good news for rnd and future [02:50:35] inspection [02:50:37] you can see it's the pure spectrum of [02:50:40] each micro led [02:50:41] in the left image [02:50:43] [Music] [02:50:45] here's a video of our measurement [02:50:47] process [02:50:48] you can see uh every point in the [02:50:52] left image is a spectrum it's a pure [02:50:55] spectrum [02:50:56] of of one micro led so you can easily [02:51:00] identify [02:51:02] the defects here [02:51:05] and if you really want to know the [02:51:06] detail really one why it's [02:51:09] white flat in spectrum [02:51:12] every micro led spectrum has been really [02:51:16] record [02:51:17] so you will have a whole database [02:51:21] of every micro led on your wafer [02:51:25] so what's more uh we collaborate with [02:51:29] jasper display they have a great cmos [02:51:33] back plan for micro led driver [02:51:36] we use their driver to light up to micro [02:51:38] led so [02:51:39] of course we can get the [02:51:42] heel and ear spectrum mapping easily of [02:51:46] each micro ed [02:51:48] also we can get zoom in [02:51:52] and get the detail of each microwave [02:51:54] spectrum [02:51:55] eos background and with the [02:51:58] gray digital modulation technology [02:52:02] jasper display spec plan can easily [02:52:05] measure the whole current mapping [02:52:09] of the of the whole micro it is on this [02:52:11] panel [02:52:12] and of course you can select uh what [02:52:16] uh whatever the pixel on the panel [02:52:19] and you can find out the iv curve of [02:52:21] that pixel [02:52:23] so actually with this kind of setup if [02:52:26] you are interested in the [02:52:28] like a mini display application we can [02:52:31] provide you a total solution [02:52:34] for inspection in your rnd stage and [02:52:37] also for your mass production state [02:52:40] so what's more i want to in [02:52:43] uh i want to emphasize one thing that [02:52:46] the wavelengths [02:52:47] because if we claim that micro8 is uh [02:52:50] is the best display we will ever have [02:52:54] we need to cheat the human eye but [02:52:56] humongous is a really great [02:52:58] color sensor for some young guys [02:53:01] two nanometer wavelengths difference [02:53:04] will be recognized [02:53:06] so in our system we have sub nanometer [02:53:11] wavelength resolution in our pl and el [02:53:15] spectrum [02:53:18] so uh what's more in southpaw i want to [02:53:20] introduce you some in-house technologies [02:53:24] we have micro 3d imaging for 3d aoi [02:53:29] indeed in a [02:53:32] transfer it's good for the ito process [02:53:37] and for the future micro ed or nano [02:53:40] aed tendency we already have the super [02:53:43] resolution [02:53:44] pl and emit pl image spectrum [02:53:48] so actually we are waiting for the burst [02:53:51] of nano led [02:53:52] and over the one micrometer microad here [02:53:57] and third i know there are so many [02:54:00] laser treatments processed in the micro [02:54:04] ed production process [02:54:06] actually we can provide one thing we [02:54:09] say digital optics we have programmable [02:54:13] multiple [02:54:14] system which is a better and new way to [02:54:16] control the laser [02:54:18] spot the multiple laser spots in a [02:54:21] real-time and programmable way [02:54:25] so this is the typical micro led [02:54:29] production process [02:54:32] with our material analyzing system you [02:54:36] can do the [02:54:36] bl el and the all the optical inspection [02:54:41] you want [02:54:44] with our micro 3d module [02:54:47] you can do the inspection on the ito [02:54:50] theme or the uh or the [02:54:54] surface morphology of the aging process [02:54:57] with the laser with our multiple c [02:55:01] you can we can provide a better way to [02:55:04] control your laser [02:55:06] spot for the laser lift up and laser [02:55:08] trimming process [02:55:11] so let's make a brief summary here why [02:55:14] inspection is so important i think it's [02:55:17] about [02:55:18] time to market i think everyone here [02:55:22] is waiting for the time to market of [02:55:24] micro led [02:55:26] but in my opinion better inspection tool [02:55:29] will bring [02:55:30] us faster design of its design of [02:55:33] experiment cycle [02:55:36] and faster doe cycle will shorten the [02:55:39] time to market [02:55:40] actually i think the best way to shorten [02:55:42] the title market [02:55:44] is identifying things as clear as [02:55:46] possible [02:55:47] in your r d house [02:55:50] so if you have the [02:55:54] better inspection tool to make [02:55:56] everything clear [02:55:58] and you can have a better inspection [02:56:00] tool also [02:56:01] brings you stable production process [02:56:06] uh so what are the challenges we have in [02:56:09] mass inspection [02:56:10] i think it's all about size because the [02:56:13] smaller led size [02:56:15] brings large numbers of leds so the [02:56:18] surface the efficiency is very very [02:56:20] important [02:56:23] and the smaller size also require [02:56:25] battery solution in [02:56:27] optics so with the smaller size [02:56:31] we need better resolution and better [02:56:34] efficiency so [02:56:35] actually we need different tools and [02:56:37] concept [02:56:38] to identify the quality of led [02:56:43] so what kind of solution do we have [02:56:46] uh with sales per system we can provide [02:56:50] you the [02:56:51] pl and eos measurement [02:56:54] with micro ed even smaller than 40 or 10 [02:56:57] micrometer and with our partner jdc [02:57:02] spectrum we can [02:57:03] give you the pl eo and the iv curve [02:57:07] measurement for micro ed on the panel [02:57:11] and that's my presentation thank you [02:57:21] okay thank you [02:57:25] so it's an excellent talk for [02:57:29] [Music] [02:57:29] [Applause] [02:57:31] it's excellent talk to to touch the [02:57:34] issue about the inspection [02:57:36] evaluation it's always the very [02:57:38] important issue for the micro led [02:57:41] so we have a question from [02:57:45] from vincent vincent campbell from [02:57:58] yeah i have a couple of questions so the [02:58:01] first one was about [02:58:03] the the laser spot size that you used to [02:58:06] measure [02:58:06] these uh micro leds how how small is the [02:58:09] spot size [02:58:11] and uh another question was that you [02:58:13] mentioned that you can do also [02:58:15] a single photo hunting and fleeing [02:58:17] measurements through the wafer [02:58:19] how long it takes to make a full wafer [02:58:21] inspection with those techniques [02:58:24] and and also related to that we know [02:58:27] that for instance the single photon [02:58:29] counting or [02:58:30] carry lifetime measurements in in micro [02:58:32] led [02:58:34] depends a lot on which spot or which [02:58:37] location of the micro led actually is [02:58:39] being measured [02:58:41] either in the center of the micro led or [02:58:44] in the edge [02:58:45] there will be variations of these [02:58:46] measurements so how can you ensure [02:58:48] repeatability on those [02:58:50] uh thank you [02:58:55] okay about the [02:58:58] light spot size in our system it depends [02:59:02] on the objective [02:59:03] lens you use typically we can go to like [02:59:07] one micrometer or smaller and [02:59:11] you talk about the tcs pc and flynn [02:59:14] actually [02:59:16] i have not used the flame to measure [02:59:19] micro led before [02:59:20] but the flame is [02:59:24] is a fast measurement if you don't need [02:59:26] so [02:59:28] many pixels and i think uh [02:59:32] what is the laser spot what is the [02:59:35] location of the laser spot [02:59:36] on the single micro led actually because [02:59:39] our resolution [02:59:41] is smaller than the micro led so [02:59:43] actually you can choose [02:59:45] in our standard production [02:59:48] we put the laser spot exactly on the [02:59:51] middle of the micro led [02:59:55] because we already have the pl image so [02:59:58] it's easy to get the right location [03:00:12] [Music] [03:00:16] are you ready [03:00:24] vincent are you happy with the answer [03:00:28] hi yes okay yeah sorry we were very mute [03:00:31] we were discussing here okay [03:00:33] okay thanks for the answers yes um [03:00:37] yeah okay okay jose [03:00:40] it's your turn now [03:00:44] thank you very much professor yang i [03:00:46] loved [03:00:47] this presentation i love having a raman [03:00:50] system integrator in the room is a dream [03:00:53] for the semicolon inspection [03:00:55] i would like to ask is there any idea to [03:00:59] integrate raman with other inspection [03:01:02] technologies [03:01:03] like oct optical coherence tomography [03:01:07] or perhaps hyperspectral imaging [03:01:12] actually we already integrated raman to [03:01:14] confocal [03:01:15] and also hyperspectral image but in [03:01:19] hyperspectral images [03:01:22] [Music] [03:01:25] so if you are talking about rama on [03:01:29] micro ed [03:01:30] actually romani is a photon phonon [03:01:33] injection so i think the [03:01:36] small defect on your on your material [03:01:40] in your inside your material is it [03:01:43] important for [03:01:44] future micro led application is [03:01:47] it important i think roman will play a [03:01:50] uh interesting role in this kind of [03:01:52] inspection [03:01:55] i i hope so i'm a huge fan of this [03:01:58] technology and i love [03:01:59] i love what you are doing integrating [03:02:00] raman for semicolon inspection [03:02:02] congratulations [03:02:03] thank you thank you hey [03:02:06] hi james it's very nice talking i have a [03:02:09] one [03:02:10] question for the el measurement [03:02:14] is it ear measurement it has to be like [03:02:17] to be connect to the contact to the [03:02:21] drivers or in order to light up or [03:02:24] do you have any other way to to inspect [03:02:27] the wafers you know [03:02:29] i can finish the wafers thing you can [03:02:31] you can do the el test [03:02:33] without using the electronics to control [03:02:36] electronics [03:02:38] um actually salzburg do the optical [03:02:41] parts [03:02:42] but in uh with our partner the jdc is [03:02:46] uh backplane you need to bundle your [03:02:48] micro led on the back plane [03:02:51] and uh i i know so many different kind [03:02:54] of technologies [03:02:55] about neuroprobe or nanoprobe array [03:02:58] they tried to attack this problem but [03:03:01] when [03:03:02] migrated like those to 5 micrometer or i [03:03:05] say 2 micrometer [03:03:07] the pad is too small so i still not [03:03:11] see the general solution here in the [03:03:14] market [03:03:16] okay so so we might have the solution so [03:03:19] maybe we can discuss later [03:03:21] ah thank you okay [03:03:24] okay we have to move on it's a very [03:03:26] excellent talk and [03:03:28] we we need to thank the igen again [03:03:31] and now we move on to the last speaker [03:03:34] of our session and it's [03:03:38] it's a jungkook leon dr jungkook liam [03:03:41] from compensate [03:03:46] hello can you by the way unmute my video [03:03:50] i [03:03:50] for some reason it says that the horse [03:03:52] hostess has unmuted [03:03:54] my video but [03:03:58] [Music] [03:04:03] can you hear me [03:04:12] all right very good so hello everybody [03:04:18] can you see my screen [03:04:22] clear oh very good [03:04:25] my name greetings from finland [03:04:28] i'm the city of comtech solutions very [03:04:31] happy to be here to present our company [03:04:33] and also to discuss [03:04:34] about the exciting world of micro ladies [03:04:38] so today we are [03:04:42] going to talk about the passive the [03:04:44] desperate need to passivate the compound [03:04:46] semi or the [03:04:47] combat semiconductors and like we have [03:04:50] heard today so there is [03:04:51] for some mysterious reasons that when [03:04:54] you decrease the chip size [03:04:56] then you lose a lot of efficiency in [03:04:59] microneeds and [03:05:00] and we have a solution for that and [03:05:03] we're going to talk about that [03:05:05] during this talk here's by the way nice [03:05:09] picture of micro led sidewall [03:05:12] if you haven't seen it it's a high [03:05:14] resolution [03:05:16] electron microscope picture [03:05:19] this is how the micro lady looks in very [03:05:22] very um when you look very closely [03:05:27] so so briefly who we are so we are [03:05:30] fairly [03:05:31] young company located in southwest [03:05:34] finland [03:05:35] turku where we have our own labs and [03:05:39] clean room processing and [03:05:40] characterization tools [03:05:44] we consider ourselves as forerunners in [03:05:47] 3-5 surface engineering with the [03:05:51] top expertise in the in a passivation [03:05:54] preferred material passivation [03:05:57] and i think this is becoming very [03:05:59] crucial skill [03:06:01] nowadays since many different [03:06:03] applications areas required a very good [03:06:06] perform [03:06:07] could be forming 35 devices like micro [03:06:10] leds [03:06:11] like we will see today and [03:06:14] comtec we are essentially a process [03:06:17] provider [03:06:19] from whom our customers can have a [03:06:22] tailored processes for their [03:06:24] application or device which basically [03:06:26] means that we we can [03:06:28] adapt our processes or technology based [03:06:30] on the customer [03:06:31] materials and overall process flow [03:06:35] and here are some [03:06:40] highlights of our capabilities so [03:06:42] basically [03:06:43] we have developed our own tools to apply [03:06:46] our technology [03:06:48] and here is one snapshot which basically [03:06:51] is the ultra high snaps of one of our [03:06:54] reactors which is a [03:06:55] ultra high vacuum reactor connected with [03:06:58] the [03:06:59] with the clean room and inert gas [03:07:01] environments so [03:07:03] with this kind of equipment we can do [03:07:04] very customized processes [03:07:06] and and for our customers [03:07:10] and also doing that under a very [03:07:13] controlled environment which is actually [03:07:15] required for the micro led [03:07:17] type of devices and as you might [03:07:21] might know that in a semiconductor [03:07:24] b main time [03:07:27] phenomena which basically determines [03:07:30] your [03:07:30] uh price performance uh are happening [03:07:35] and that's why we are also doing the [03:07:39] characterization from atomic level to [03:07:41] the device level [03:07:43] uh we have also our on tool [03:07:47] some of those like clever [03:07:49] microelectricity [03:07:50] previous talk was very interesting also [03:07:54] also which highlights basic the need for [03:07:56] doing proper [03:07:57] uh inspects so here on the [03:08:01] bottom the corner is this kind of [03:08:05] fluorescence lifetime imaging a picture [03:08:08] from a micro led showing uh [03:08:10] how the carrier lifetime is distributed [03:08:13] in the [03:08:14] in led for instance and on the right [03:08:17] hand side there is a [03:08:19] lifetime we can see for instance how the [03:08:22] carrying carrier lifetime is is changed [03:08:25] in the quantum level versus the [03:08:27] versus the barrier layers for instance [03:08:28] so these are very important [03:08:30] methods for us to evaluate our processes [03:08:32] and and [03:08:34] and also to understand what is really [03:08:36] happening at the [03:08:37] material and device [03:08:42] so to the topic uh challenges [03:08:46] related so today we have heard many [03:08:50] we have had a discussion about the mass [03:08:52] transfer those kind of [03:08:53] things uh which seems to be already [03:08:56] solved in in [03:08:57] like excellent print was was shown very [03:08:59] nice very nice performance [03:09:01] in the mass transfer quality but there [03:09:04] are [03:09:05] other things like how to do bonding [03:09:07] bonding etc [03:09:08] properly but one of the most important [03:09:11] factors [03:09:13] when you decrease the ship size is [03:09:15] actually the sidewalk quality so [03:09:17] like we heard the efficiency goes down [03:09:19] drastically when you [03:09:21] when you decrease the chip size and and [03:09:22] that is actually because of the defects [03:09:25] at the sidewall and those basically [03:09:28] play a very important role in [03:09:30] determining the ultimate performance of [03:09:33] of [03:09:34] the efficiency of micro led so [03:09:37] what is happening at the micro led [03:09:42] sidewalls so basically when you [03:09:45] define your led you of course do etching [03:09:49] by fry processes like icp you generate [03:09:52] some [03:09:53] amount of defects to the to the sidewall [03:09:56] already [03:09:58] but then when you remove that wafer for [03:10:01] instance from there [03:10:02] processing tool you actually oxidize [03:10:05] those surfaces and three five materials [03:10:07] which [03:10:08] the micro leds are made of are are very [03:10:11] aggressively oxidized and [03:10:13] here is one very nice picture it is [03:10:16] atomic resolution picture from the side [03:10:19] wall of the [03:10:21] of the micro led showing this kind of [03:10:23] blurry [03:10:24] region and that is a native oxide [03:10:28] of at the surface and it doesn't have [03:10:31] any [03:10:32] good order or it's like amorphous [03:10:34] structure and this kind of [03:10:35] lack of atomic level coordination [03:10:38] creates high density [03:10:40] of defect states in the band cap of the [03:10:42] semiconductor which is shown in the [03:10:45] top right corner image and [03:10:48] these kind of defects they act as a [03:10:51] non-radiative recombination [03:10:54] centers which means that when you inject [03:10:56] that [03:10:57] you would like to have a light out of [03:10:59] the led that [03:11:00] the carriers you inject are actually [03:11:02] lost in these defects and [03:11:04] generating heat but not light so you [03:11:06] don't have a your efficiency goes down [03:11:08] drastically and that is also shown here [03:11:12] in the in a real life picture how that [03:11:14] if you have 100 micron micro led and you [03:11:16] go down to 5 micron your [03:11:18] efficiency goes down drastically [03:11:21] but also the current density where you [03:11:23] achieve the peak [03:11:24] efficiency goes goes to the very high [03:11:27] current densities [03:11:28] so this is a big issue and and [03:11:31] needs to be solved before you want if [03:11:33] you want to make very high [03:11:36] brightness and efficient displays or any [03:11:39] kind of micro led application [03:11:42] and here at comtech we have a solution [03:11:44] for that [03:11:45] so which we call controls [03:11:48] it is by this contract process this [03:11:51] i'm going to talk about next slide this [03:11:53] is we can achieve [03:11:54] up to 98 reduction in the defect state [03:11:57] densities [03:11:58] compared to existing metals in three [03:12:00] four materials [03:12:04] so what is what is contract so basically [03:12:06] it's a [03:12:08] family of patented processes for [03:12:10] different kind of [03:12:12] combat semiconductor materials where we [03:12:15] can [03:12:16] uh transform the surfaces of of [03:12:20] three fives into crystalline oxides [03:12:22] which are [03:12:24] with the very low defect state densities [03:12:26] and and which are [03:12:27] stable so these structures are stable [03:12:30] under [03:12:30] under air exposure or ald process [03:12:34] or against high temperature annealing so [03:12:36] these are [03:12:37] there are some pictures on the left hand [03:12:40] side there is [03:12:41] a picture of native oxide on top of [03:12:45] g5 semiconductor it looks very this kind [03:12:48] of rough [03:12:49] and i'm office and after our process we [03:12:50] can create them [03:12:53] at atomic level very ordered crystalline [03:12:55] oxide with the good [03:12:58] properties [03:13:01] and this is applicable to many [03:13:04] combat semiconductor materials which [03:13:06] here is a snapshot of the material scope [03:13:09] that we are [03:13:10] dealing with so of course here we are [03:13:12] mostly interested in [03:13:14] led and optoelectronic applications but [03:13:16] i need to emphasize that this [03:13:17] issue is is very relevant in many other [03:13:20] fields which require very high [03:13:22] efficiency and a good performing 35 [03:13:25] devices like radio frequency or power [03:13:27] electronic transistor applications [03:13:30] so we are active in these these areas [03:13:33] very much so what we can do for micro [03:13:37] ladies [03:13:38] so we have a process ready for for [03:13:41] gallium nitride based blue and green [03:13:43] devices but also [03:13:44] a native red color device which is [03:13:47] indium gallium [03:13:48] aluminium phosphide normally [03:13:51] how we do this is is like said there is [03:13:53] a [03:13:54] might be some existing damage to that [03:13:56] due to the processes [03:13:58] done by the icp so we [03:14:01] we do preparations that where we heal [03:14:04] heal the semicond [03:14:05] like reveal the fresh semiconductor by [03:14:07] by our methods and [03:14:09] then we do our magic passivation step in [03:14:12] in a very controlled environment where [03:14:14] we can achieve very good uh [03:14:18] cheap efficiencies and after that so we [03:14:22] are not [03:14:22] replacing any over coating process in a [03:14:25] sense we are [03:14:26] just a complementary process so after [03:14:28] that you can do ald or pec with decoding [03:14:32] if required or depending on your overall [03:14:35] process flow [03:14:40] and these of course [03:14:43] need to be adapted to the particular [03:14:46] customer [03:14:47] process floor materials and and for [03:14:49] instance [03:14:50] such in a laser application we our [03:14:53] process comes in a very [03:14:54] final step we passive at laser facets [03:14:57] but in micro leds [03:14:58] it can come in at various points [03:15:01] depending on the overall [03:15:02] process flow [03:15:06] so some uh results so [03:15:10] uh the native red color is very [03:15:13] challenging [03:15:14] in in to be done efficiently in very [03:15:17] small sizes [03:15:18] that is because of the high surface [03:15:22] recombination rate of the [03:15:23] of the indium gallium aluminium [03:15:27] phosphide material which is the [03:15:28] native red color and [03:15:32] and mainly because of aluminium which is [03:15:34] easily generates [03:15:35] this kind of high defect defective [03:15:39] layers [03:15:41] and here we demonstrate like in material [03:15:43] level there is a [03:15:44] we can clean the this material we can [03:15:47] get very nice [03:15:48] electron diffraction pattern and showing [03:15:50] clean surface [03:15:52] and doing our process on top of that we [03:15:54] basically change the [03:15:55] the symmetry of the of the surface and [03:15:58] create crystalline oxide so [03:15:59] it works in the material level and then [03:16:01] applying this process to the mesa level [03:16:04] we see very nice improvement in that [03:16:07] in a carrier lifetime which basically [03:16:10] means that you [03:16:10] reduce the non-rated recombination [03:16:14] rate a lot and yet when you apply this [03:16:17] to that [03:16:18] a cheap level in micro led you see big [03:16:21] enhancement in the [03:16:22] efficiency of of the device [03:16:28] and you get them more examples so like i [03:16:31] said the [03:16:32] size dependency of the efficiency is is [03:16:34] very [03:16:35] big issue and and so this left-hand side [03:16:39] graph [03:16:39] shows you the relative efficiency versus [03:16:43] of the art 80 micron microled so you see [03:16:46] that [03:16:46] normally when you decrease from 80 [03:16:49] micron to [03:16:50] 5 micron you have like only 30 percent [03:16:53] of the efficiency [03:16:56] normally but when you do [03:16:59] when we do our process we we we see big [03:17:01] improvements so it's only [03:17:03] there's basically the size dependency [03:17:07] of the efficiency is reduced a lot [03:17:10] the same goes with the current density [03:17:12] so the current density [03:17:13] basically is is reduced [03:17:17] a lot because of of the efficient [03:17:24] passivation [03:17:26] so um to summarize [03:17:30] a little bit the added value also to [03:17:31] answer the epic question [03:17:33] what we can do for you so with our [03:17:36] atomic level [03:17:37] passivation technology we see that [03:17:40] which is we see that we can greatly [03:17:43] enhance the efficiency [03:17:44] of micro leds which basically translates [03:17:47] into [03:17:48] brighter and less power consuming [03:17:51] devices [03:17:53] and we also think that we our technology [03:17:56] is the key enabler for [03:17:58] for red color in native rgb [03:18:01] displays so you don't need to use [03:18:03] necessarily the down conversion of from [03:18:04] gallium nitride to [03:18:06] the red color and [03:18:09] also since our process is efficient [03:18:13] basically removing the effects we we [03:18:15] that [03:18:16] we also increase the manufacturing yield [03:18:18] so there will be less [03:18:20] non-uniformity in the in the chips [03:18:23] actually like that we saw in the [03:18:25] previous slides that they're [03:18:27] there i can go actually back one one [03:18:30] back so you can see that the [03:18:31] performance distribution of the of the [03:18:35] micro leds also reduced by our process [03:18:44] and yeah so [03:18:47] what then how we collaborate so what [03:18:52] you can do for us i would say that uh [03:18:54] join join us and collaborate with us to [03:18:57] to enable this next micro led revolution [03:19:00] so basically how we work is that [03:19:02] we do the process optimization and [03:19:05] implementation to the customer [03:19:07] and then the customer gets [03:19:11] access to our ip portfolio and and we do [03:19:13] the technology transfer and [03:19:16] we have a partnership with well-known [03:19:18] equipment maker river [03:19:20] who can provide mass production [03:19:23] tools to apply our technology for micro [03:19:26] leds [03:19:27] so thank you i think i [03:19:30] was on time almost happy to answer your [03:19:34] questions [03:19:39] okay thank you [03:19:47] i think we have some some sound [03:19:49] traveling with professor yang at the [03:19:51] moment [03:19:53] i think it's related to the fact that he [03:19:55] may have a [03:19:57] an ipad and a computer connected both to [03:20:00] the zoom channel [03:20:01] because there is some echo in the [03:20:04] meantime i'm going to [03:20:05] to take the first question from context [03:20:07] solution what an amazing [03:20:09] added value we had a question we had a [03:20:12] presentation before you from the company [03:20:14] southport [03:20:15] and i think there is some room for [03:20:17] cooperation here [03:20:19] ian sheng from southport do you spot [03:20:22] here something that we can do together [03:20:29] i will i will i will i will tell him we [03:20:31] discuss in private but maybe again [03:20:34] same from southport you can ask yes yeah [03:20:37] uh actually i i really excited about the [03:20:41] great work [03:20:42] about compact and compact and i think [03:20:46] because you are you are [03:20:47] already working on the like defect or [03:20:50] molecular skill [03:20:51] so maybe ramen could be an interesting [03:20:54] tool [03:20:55] to identify the quality about your great [03:20:58] work [03:21:00] yes definitely i i see ramon raman a [03:21:03] very [03:21:04] interesting tool also too to gain more [03:21:07] understanding [03:21:08] what is happening in the micro led level [03:21:11] so [03:21:12] yeah very eager to to discuss with you [03:21:14] more about this [03:21:15] yeah okay yeah we can keep in touch i [03:21:18] think it's a really [03:21:19] interesting problem here [03:21:21] [Music] [03:21:22] yeah i have a question can you hear me [03:21:26] yes okay uh it's excellent talk actually [03:21:31] it's uh we always know that the red [03:21:34] is the challenge for us especially for [03:21:37] how to [03:21:37] recover the efficiency loss at a smaller [03:21:40] size [03:21:41] and for the getting nitrite and we have [03:21:44] some [03:21:44] way to passively you know proof [03:21:47] improvement yeah red is always a [03:21:48] challenge [03:21:49] i think you you give a very nice [03:21:51] resource and which is [03:21:53] very encouraging our process is [03:21:56] happening in an ultra high vacuuming [03:21:58] environment so it's [03:21:59] a little bit exotic process [03:22:02] for it's not the piece evd so we don't [03:22:04] deposit anything [03:22:06] but we rather we actually transform the [03:22:10] surfaces of three-four materials into [03:22:12] into crystalline oxide [03:22:14] and this happens in high vacuum [03:22:15] conditions [03:22:19] that is why for instance river which is [03:22:21] a well-known [03:22:23] high vacuum process tool manufacturers [03:22:27] is our partner so they are [03:22:31] they are doing for instance the epitaxy [03:22:33] mass production epitax equipment for for [03:22:35] for radio frequency uh applications so [03:22:38] yeah it's not typical it's not pc video [03:22:42] we do it much better better conditions [03:22:44] than [03:22:45] than pc video for instance [03:22:48] okay so so does this this [03:22:52] speed is always a concerning for [03:22:55] uh for this kind of the solutions yeah [03:22:57] okay [03:22:59] okay so so maybe you know you can find [03:23:01] some better way to [03:23:03] to improve that yeah yeah now i need to [03:23:06] say there that [03:23:07] the time to process this to the process [03:23:11] is is comparable with the deposition [03:23:14] techniques such as [03:23:15] ald for instance so it's not there if [03:23:18] you do multi-wave [03:23:19] process you can process many many vapors [03:23:22] and the process is conformal and and [03:23:24] suitable for big wave precisely like 200 [03:23:27] millimeters [03:23:29] where the micro led is going to gallium [03:23:32] nitride and silicon so we are we are [03:23:34] we can do that on a big wafers also [03:23:37] great [03:23:38] yeah so actually the alg has some [03:23:41] potential although the lg is slow but [03:23:44] there is a new technology on the horizon [03:23:47] and it could be make aod faster so that [03:23:49] might be [03:23:50] be able to do the mass production [03:23:53] solutions [03:23:57] and there there we are i i see in terms [03:24:00] ali we are kind of [03:24:01] complementary process so we actually [03:24:04] we make a perfect interface between the [03:24:07] semiconductor and ald [03:24:09] because if you do only ald you will have [03:24:11] still a bad quality interface between [03:24:13] those two materials and [03:24:15] we can we can passivate that interface [03:24:18] because our layers are very thin so only [03:24:21] a few monolayers to nanometer so it's [03:24:23] not [03:24:24] it's very thin layer but it's a key is [03:24:26] the actual interface between the [03:24:28] semiconductor and [03:24:30] and the for instance ald coating [03:24:34] okay okay thank you [03:24:38] thank you [03:24:41] professor yang we are all very out of [03:24:43] time but there is a person in the room [03:24:46] alexander losing from alos a [03:24:49] allo semiconductor who is a manufacturer [03:24:52] of gallium nitride over silicon [03:24:54] substrates [03:24:55] i would like to know his views about [03:24:57] this technology and how can it help [03:24:59] semiconductor manufacturing companies [03:25:01] alexander are you with us [03:25:08] uh good uh good afternoon good morning [03:25:10] to everybody i'm [03:25:12] very pleased to meet be here again yes i [03:25:15] um i also know the comptec um solution [03:25:18] and i think it's a great [03:25:19] step forward to [03:25:23] solve this issue of [03:25:26] inefficiency reduct production for some [03:25:29] chips here is also to see how that will [03:25:31] impact red nitrite leds which more and [03:25:34] more people are looking at [03:25:36] and i also very much appreciate that [03:25:39] this is available for larger wafer [03:25:40] diameters because we see that 200 [03:25:42] millimeter [03:25:43] and 300 millimeter are on the way in [03:25:46] particular to address the yield [03:25:47] challenge [03:25:48] um simply by using [03:25:52] style equipment to [03:25:57] have very high micro leds down to [03:26:00] even less than one by one micrometer is [03:26:03] the size which [03:26:04] we see at some of our customers in this [03:26:06] event we have companies [03:26:07] tatis we have companies like epistar we [03:26:10] have companies [03:26:12] i want to speak to you yoko from comtech [03:26:15] solutions [03:26:15] i'm really amazed i really am back to [03:26:18] young [03:26:19] professors okay [03:26:22] so if we don't have further questions [03:26:26] and [03:26:26] i would like to conclude the the whole [03:26:29] event [03:26:30] and thanks every speaker every speakers [03:26:33] and all develop delivered a very [03:26:36] excellent talk and also the [03:26:40] you know the whole session we have a [03:26:42] broad coverage about the microsd issues [03:26:46] from manufacturing issues from [03:26:49] you know aging or you know [03:26:52] and from the chip side you know chip [03:26:54] issues [03:26:55] and also a lot of excellent [03:26:59] talking from manufacturing side [03:27:01] especially [03:27:02] those challenges they are facing and [03:27:04] also [03:27:05] some of the applications so so it's a [03:27:08] very [03:27:09] good spectrum of the microalgae [03:27:11] discussion in this [03:27:12] event so i really appreciate everybody's [03:27:16] contributions and thanks again and also [03:27:20] we we had a very nice tennis [03:27:23] uh i saw that during the [03:27:27] time maybe over 750 or maybe more [03:27:30] attendees and also we have excellent [03:27:33] discussion [03:27:34] after each talks so again [03:27:37] and it's it's my honor to to share this [03:27:41] sessions and also [03:27:43] bring everyone together for this [03:27:45] wonderful event [03:27:46] and this is a good opportunity to [03:27:50] bring everyone together especially [03:27:53] those manufacturer makers and technology [03:27:56] providers in europe [03:27:57] and and the manufacturing and [03:28:01] technology advances in china and taiwan [03:28:05] so it's a great event and again thanks [03:28:08] everyone [03:28:08] yeah okay so [03:28:13] jose you want to make some comments and [03:28:15] also yes one quick comment [03:28:16] which is that you see this slide i want [03:28:19] all of you to have it to remember today [03:28:21] these are the companies who register [03:28:23] today these are the companies who [03:28:25] register today you know what we have to [03:28:27] do now [03:28:27] we have to make sure that we do business [03:28:30] so all of you right now in the chat [03:28:32] you got a link you got a link from [03:28:35] wonder dot [03:28:36] me what you have to do is click on that [03:28:38] link click on that link [03:28:40] and you will appear in an interface for [03:28:43] us to connect [03:28:44] and do business for us to connect and [03:28:46] make new friends [03:28:48] so please only even you only have five [03:28:51] minutes [03:28:51] it is totally worth it try it click on [03:28:54] the link you will [03:28:55] not regret it you will appear in another [03:28:57] interface in which you are gonna be [03:28:59] using it [03:29:00] to connect i love connecting this was a [03:29:03] fantastic event [03:29:04] professor yang i love sharing co-sharing [03:29:07] the meeting with you [03:29:08] it was truly an honor and i also love [03:29:11] all the amazing feedback that i have [03:29:13] been receiving during the event from [03:29:14] many companies [03:29:16] who found potential partners suppliers [03:29:18] and customers [03:29:19] that's the amazing job that isa and pida [03:29:23] together with epic [03:29:25] we have to do thank you so much [03:29:27] professor sergian from my site until the [03:29:29] next time [03:29:30] goodbye see you in wonder.me okay thank [03:29:33] you carlos [03:29:34] also thank you joe jose and also thank [03:29:38] our our secretary for [03:29:42] i say and mr [03:29:45] cho two so uh [03:29:48] i think we work together make this event [03:29:50] happen thanks everyone