1. Kuwunikira mwachidule zaukadaulo waukadaulo wama LED opangidwa ndi silicon

Kukula kwa zida za GaN pamagawo a silicon kumakumana ndi zovuta ziwiri zazikulu zaukadaulo.Choyamba, kusagwirizana kwa latisi mpaka 17% pakati pa gawo lapansi la silicon ndi GaN kumapangitsa kuti pakhale kusasunthika kwakukulu mkati mwa zinthu za GaN, zomwe zimakhudza mphamvu ya luminescence;Kachiwiri, pali kusagwirizana kwamafuta mpaka 54% pakati pa gawo lapansi la silicon ndi GaN, zomwe zimapangitsa kuti mafilimu a GaN ayambe kusweka pambuyo pakukula kwa kutentha kwambiri ndikutsika kutentha, zomwe zimakhudza zokolola.Chifukwa chake, kukula kwa chotchinga pakati pa gawo lapansi la silicon ndi filimu yopyapyala ya GaN ndikofunikira kwambiri.Chigawo cha buffer chimathandizira kuchepetsa kusasunthika mkati mwa GaN ndikuchepetsa kusweka kwa GaN.Pamlingo waukulu, mulingo waukadaulo wa buffer wosanjikiza umatsimikizira kuchuluka kwachulukidwe kwamkati ndi kutulutsa kwa LED, komwe kumayang'ana komanso kuvutikira kwa silicon-based.LED.Pofika pano, ndi ndalama zambiri zofufuza ndi chitukuko kuchokera kumakampani ndi maphunziro, vuto laukadauloli lathetsedwa.

Gawo la silicon limatenga kwambiri kuwala kowoneka, kotero filimu ya GaN iyenera kusamutsidwa ku gawo lina.Asanasamutsidwe, chowunikira chapamwamba chimayikidwa pakati pa filimu ya GaN ndi gawo linalake kuti kuwala kotulutsidwa ndi GaN kusalowedwe ndi gawo lapansi.Mawonekedwe a LED pambuyo pa kusamutsidwa kwa gawo lapansi amadziwika kuti ndi Thin Film chip.Tchipisi tating'onoting'ono takanema timakhala ndi zabwino kuposa tchipisi tanthawi zonse tikatengera kufalikira kwaposachedwa, matenthedwe amafuta, komanso mawonekedwe ofanana.

2. Mwachidule za momwe ntchito ikugwiritsidwira ntchito komanso kuwunika kwa msika wa ma LED a silicon substrate

Ma LED okhala ndi silicon amakhala ndi mawonekedwe oyima, kugawa kwapano kofananira, komanso kufalikira mwachangu, kuwapangitsa kukhala oyenera kugwiritsa ntchito mphamvu zambiri.Chifukwa cha kuwala kwa mbali imodzi, kuwongolera bwino, komanso kuwala kwabwino, ndikoyenera kwambiri kuyatsa kwamafoni monga kuyatsa magalimoto, zowunikira, nyali zamigodi, magetsi owunikira mafoni am'manja, ndi malo owunikira apamwamba omwe ali ndi zofunikira zapamwamba kwambiri. .

Ukadaulo ndi njira ya Jingneng Optoelectronics silicon gawo lapansi la LED zakhwima.Pamaziko a kupitilizabe kukhala ndi zopindulitsa pagawo la silicon substrate blue light LED chips, malonda athu akupitilizabe kumadera owunikira omwe amafunikira kuwala kowongolera komanso kutulutsa kwapamwamba, monga tchipisi toyera ta LED tokhala ndi magwiridwe antchito apamwamba komanso mtengo wowonjezera. , nyali zamafoni amtundu wa LED, nyali zamagalimoto a LED, magetsi amsewu a LED, kuwala kwa LED, ndi zina zotero, pang'onopang'ono kukhazikitsa malo abwino a silicon substrate tchipisi ta LED pamsika wagawo.

3. Kuneneratu kwachitukuko kwa silicon gawo lapansi la LED

Kupititsa patsogolo kuwala, kuchepetsa mtengo kapena kutsika mtengo ndi mutu wamuyaya muMakampani a LED.Tchipisi tating'ono tating'ono ta silicon tifunika kupakidwa musanagwiritse ntchito, komanso mtengo wamapaketi opangira gawo lalikulu la mtengo wogwiritsa ntchito LED.Dumphani zolongedza zachikhalidwe ndikuyika mwachindunji zigawozo pawafa.Mwanjira ina, kuyika kwa chip Scale (CSP) pa chowotcha kumatha kudumpha kumapeto kwake ndikulowetsa mwachindunji kumapeto kwa chip, ndikuchepetsanso mtengo wakugwiritsa ntchito kwa LED.CSP ndi imodzi mwazinthu zomwe zikuyembekezeka kukhala ndi ma LED a GaN pa silicon.Makampani apadziko lonse lapansi monga Toshiba ndi Samsung adanenanso kuti akugwiritsa ntchito ma LED a silicon a CSP, ndipo akukhulupirira kuti zinthu zokhudzana ndi izi zipezeka pamsika.

M'zaka zaposachedwa, malo ena otentha pamsika wa LED ndi Micro LED, yomwe imadziwikanso kuti micrometer level LED.Kukula kwa ma Micro LED kumachokera ku ma micrometer angapo mpaka makumi a ma micrometer, pafupifupi pamlingo wofanana ndi makulidwe a makanema owonda a GaN omwe amakula ndi epitaxy.Pamlingo wa micrometer, zida za GaN zitha kupangidwa mwachindunji kukhala GaNLED yokhazikika popanda kufunika kothandizidwa.Ndiko kunena kuti, pokonzekera ma Micro LED, gawo lapansi lokulitsa GaN liyenera kuchotsedwa.Ubwino wachilengedwe wa ma LED opangidwa ndi silicon ndikuti gawo lapansi la silicon limatha kuchotsedwa ndi etching yonyowa ndi mankhwala okha, popanda kukhudza chilichonse pa zinthu za GaN panthawi yochotsa, kuwonetsetsa zokolola komanso kudalirika.Kuchokera pamalingaliro awa, ukadaulo wa silicon gawo lapansi la LED uyenera kukhala ndi malo pagawo la ma Micro LED.