Chii chinonzi LED chip? Saka ndeapi maitiro ayo? Chinangwa chikuru chekugadzira LED chip kugadzira inoshanda uye yakavimbika yakaderera ohm kuonana maelectrode, uye kusangana neinodonha diki voltage pakati pezvinhu zvinobatika uye nekupa kumanikidza mapadhi ekutengesa waya, uku uchiwedzera huwandu hwekubuda kwechiedza. Iyo yemuchinjikwa firimu maitiro kazhinji inoshandisa vacuum evaporation nzira. Pasi pevhacuum yakakwira ye4Pa, zvinhu zvinonyungudutswa nekudziisa kupisa kana electron beam bombardment heat method, uye BZX79C18 inoshandurwa kuita mhute yesimbi uye inoiswa pamusoro peiyo semiconductor zvinhu pasi pekumanikidzwa kwakaderera.
Iyo inowanzoshandiswa P-mhando yekubatanidza simbi inosanganisira alloys akadai seAuBe neAuZn, nepo simbi yekubata paN-side inowanzogadzirwa neAuGeNi alloy. Iyo alloy layer yakaumbwa mushure mekuputira inodawo kuratidzwa zvakanyanya sezvinobvira munzvimbo ye luminescent kuburikidza nephotolithography process, kuitira kuti iyo yakasara alloy layer inogona kusangana nezvinodiwa zveanoshanda uye akavimbika yakaderera ohm kuonana maelectrodes uye solder wire pressure pads. Mushure mekunge chirongwa chephotolithography chapedzwa, inodawo kuenda kuburikidza nekugadzirisa nzira, iyo inowanzoitwa pasi pekuchengetedzwa kweH2 kana N2. Iyo nguva uye tembiricha yealloying inowanzo tsanangurwa nezvinhu zvakaita senge hunhu hwesemiconductor zvinhu uye chimiro chechoto chealloy. Ehe, kana iyo yebhuruu-girinhi uye mamwe chip electrode maitiro akanyanya kuoma, zvinodikanwa kuwedzera passivation firimu kukura, plasma etching maitiro, nezvimwe.
Mukugadzira maitiro e LED machipisi, ndeapi maitiro ane zvakakosha pakuita kwavo optoelectronic?
Kazhinji, mushure mekupedzwa kwekugadzirwa kwe LED epitaxial, kushanda kwayo kukuru kwemagetsi kwakapedzwa, uye kugadzira chip hakuchinje maitiro ayo ekugadzira. Zvisinei, mamiriro asina kufanira panguva yekuputira uye alloying maitiro anogona kukonzera mamwe magetsi emagetsi kuti ave asina kunaka. Semuyenzaniso, yakaderera kana yakakwira alloying tembiricha inogona kukonzera kushomeka kweOhmic kubata, inova ndiyo honzeri huru yekukwira kumberi voltage kudonha VF mukugadzira chip. Mushure mekucheka, mamwe maitiro ekuora pamipendero yechip anogona kubatsira mukuvandudza reverse kuvuza kwechip. Izvi zvinodaro nekuti mushure mekucheka nedhaimondi rinokuya vhiri blade, pachava nemarara akawanda akasara nehupfu pamucheto wechip. Kana izvi zvimedu zvakanamatira kuPN junction ye LED chip, zvinokonzeresa kubuda kwemagetsi uye kunyange kuparara. Uye zvakare, kana iyo photoresist iri pamusoro peiyo chip isina kupepetwa zvakachena, zvinokonzeresa kunetsa pamberi pe soldering uye virtual soldering. Kana iri kumusana, inokonzerawo kuderera kwepamusoro. Munguva yekugadzira chip maitiro, roughening pamusoro uye trapezoidal zvimiro zvinogona kushandiswa kuwedzera kusimba kwechiedza.
Sei machipisi e LED achida kukamurwa muhukuru hwakasiyana? Chii chinokanganisa saizi pane LED optoelectronic performance?
LED machipisi anogona kukamurwa kuita akaderera-simba machipisi, epakati simba machipisi, uye akakwira-simba machipisi akavakirwa pasimba. Zvinoenderana nezvinodiwa nevatengi, inogona kupatsanurwa muzvikamu senge single tube level, digital level, dot matrix level, uye yekushongedza mwenje. Kana iri saizi chaiyo yechip, zvinoenderana neiyo chaiyo yekugadzira nhanho yevakasiyana chip vanogadzira uye hapana chakanangana nezvinodiwa. Chero bedzi iyo nzira yapfuura, iyo chip inogona kuwedzera kuburitsa uye kuderedza mutengo, uye iyo photoelectric kuita haizoitike shanduko dzakakosha. Ikozvino inoshandiswa ne chip inonyatso hukama kune ikozvino density inoyerera kuburikidza nechip. Chipi chidiki chinoshandisa zvishoma zvazvino, nepo chip hombe chichishandisa yazvino, uye yuniti yavo yazvino density yakangofanana. Tichifunga kuti kupisa kupisa ndiro dambudziko guru pasi pepamusoro pemazuva ano, kushanda kwayo kunopenya kwakaderera pane iyo pasi pemazuva mashoma. Kune rumwe rutivi, sezvo nzvimbo inowedzera, kupikisa kwemuviri kwechiputi kunoderera, zvichiita kuti kuderera kwekufambisa mberi kwemhepo.

Ndeipi nzvimbo yakajairika ye LED yakakwira-simba machipisi? Sei?
LED dzepamusoro-simba machipisi anoshandiswa mwenje chena anowanzo kuoneka mumusika kunosvika 40mil, uye simba rinoshandiswa kune epamusoro-simba machipisi rinowanzo reva simba remagetsi rinopfuura 1W. Nekuda kwehuwandu hwehuwandu hunowanzo kuve husingasviki 20%, simba remagetsi rakawanda rinoshandurwa kuita simba rinopisa, saka kupisa kupisa kwakakosha kune machipisi ane simba guru, zvinoda kuti ave nenzvimbo yakakura.
Ndezvipi zvakasiyana zvinodiwa zve chip tekinoroji uye michina yekugadzira yekugadzira GaN epitaxial zvinhu zvichienzaniswa neGaP, GaAs, uye InGaAlP? Sei?
Iwo ma substrates eakajairwa ma LED matsvuku uye yero machipisi uye kupenya kwakanyanya quaternary tsvuku uye yero machipisi zvese zvinoshandisa komputa semiconductor zvinhu zvakaita seGaP neGaAs, uye zvinogona kugadzirwa kuita N-mhando substrates. Kushandisa wet process yephotolithography, uye gare gare kucheka kuita machipisi uchishandisa madhaimondi ekukuya mavhiri mavhiri. Iyo yebhuruu-girini chip yakagadzirwa neGaN zvinhu inoshandisa sapire substrate. Nekuda kweiyo insulating hunhu hwesafire substrate, haigone kushandiswa se LED electrode. Naizvozvo, ese ari maviri eP/N maelectrodes anofanirwa kugadzirwa pane epitaxial pamusoro nekuoma etching uye mamwe maitiro ekufambisa anofanirwa kuitwa. Nekuda kwekuoma kwesafire, zvakaoma kucheka kuita machipisi nemadhaimondi ekukuya mavhiri mavhiri. Maitiro ayo ekugadzira anowanzo kuomarara kupfuura ayo eGaP neGaAs zvinhu zveLED mafashamo magetsi.

Chii chimiro uye maitiro e "transparent electrode" chip?
Iyo inonzi inonzi transparent electrode inofanira kukwanisa kutungamirira magetsi uye kukwanisa kutumira chiedza. Ichi chinyorwa chave kushandiswa zvakanyanya mukugadzirwa kwekristaro yemvura, uye zita rayo inonzi indium tin oxide, yakapfupikiswa seITO, asi haigone kushandiswa senge solder pad. Paunenge uchigadzira, zvakakosha kuti utange wagadzirira ohmic electrode pamusoro pechiputi, wozovhara pamusoro nepamusoro peITO, uye wozoisa mutsara we solder pads pamusoro peITO. Nenzira iyi, ikozvino inoburuka kubva kune inotungamira waya inogoverwa zvakaenzana kuyambuka ITO layer kune yega yega ohmic contact electrode. Panguva imwecheteyo, nekuda kweiyo refractive index yeITO iri pakati pemhepo uye refractive index ye epitaxial material, chiedza chechiedza chinogona kuwedzerwa, uye chiedza chechiedza chinogonawo kuwedzerwa.

Ndeipi budiriro huru yechip tekinoroji yemwenje semiconductor?
Nekuvandudzwa kweiyo semiconductor LED tekinoroji, kushandiswa kwayo mumunda wekuvhenekesa kuri kuwedzera zvakare, kunyanya kubuda kweiyo chena LED, iyo yave nyaya inopisa mukuvhenekesa semiconductor. Nekudaro, makiyi machipisi uye matekinoroji ekurongedza achiri kuda kuvandudzwa, uye kuvandudzwa kwemachipisi kunofanirwa kutarisisa simba repamusoro, mwenje wakakwira, uye kudzikisira kupisa kwekupisa. Kuwedzera simba kunoreva kuwedzera kushandiswa ikozvino kwechip, uye nzira yakananga ndeyekuwedzera chip size. Iwo anowanzo shandiswa epamusoro-simba machipisi akatenderedza 1mm x 1mm, aine mashandisiro azvino e350mA. Nekuda kwekuwedzera kwekushandisa ikozvino, kupisa kupisa kwave dambudziko rakakurumbira. Iye zvino, iyo nzira ye chip inversion yakagadzirisa dambudziko iri. Nekuvandudza tekinoroji yeLED, kushandiswa kwayo mumunda wekuvhenekesa kuchasangana nemikana isati yamboitika nematambudziko.
Chii chinonzi inverted chip? Chii chimiro chayo uye ndezvipi zvakanakira?
Bhuruu chiedza LEDs anowanzo shandisa Al2O3 substrates, iyo ine kuoma kwakanyanya, kuderera kwekushisa conductivity, uye magetsi ekugadzirisa. Kana chimiro chepamutemo chikashandiswa, kune rumwe rutivi, chichaunza matambudziko e-anti-static, uye kune rumwe rutivi, kupisa kupisa kuchavawo dambudziko guru pasi pemamiriro ezvinhu epamusoro. Panguva imwecheteyo, nekuda kweiyo electrode yakanaka yakatarisa kumusoro, ichavhara imwe yechiedza uye kuderedza kupenya kunopenya. High simba rebhuruu mwenje ma LEDs anogona kuwana anobudirira mwenje kubuda kuburikidza nechip flip tekinoroji pane yechinyakare yekurongedza nzira.
Iyo yazvino mainstream inverted chimiro nzira ndeyekutanga kugadzirira yakakura saizi yebhuruu mwenje LED machipi ane akakodzera eutectic welding electrodes, uye panguva imwe chete, gadzirira silicon substrate yakakura zvishoma pane yebhuruu mwenje LED chip, uye pamusoro payo, gadzira goridhe conductive layer ye eutectic welding uye lead out layer (ultrasonic gold waya bhora solder joint). Zvadaro, yakakwirira-simba rebhuruu LED machipisi anotengeswa pamwe chete nesilicon substrates uchishandisa eutectic welding michina.
Chimiro chechimiro ichi ndechokuti epitaxial layer inosangana zvakananga nesilicon substrate, uye kupisa kwekushisa kwesilicon substrate kwakaderera zvikuru kupfuura kwesapphire substrate, saka dambudziko rekupisa kupisa rinogadziriswa zvakanaka. Pamusana pekuti safire substrate inotarisana nepamusoro mushure mekushandura, ichiva nzvimbo inobudisa, safire iri pachena, nokudaro kugadzirisa dambudziko rekubudisa chiedza. Izvo zviri pamusoro ndiyo ruzivo rwakakodzera rwe LED tekinoroji. Ndinotenda kuti nekuvandudzwa kwesainzi uye tekinoroji,Mwenje dze LEDzvichawedzera kushanda zvakanaka mune ramangwana, uye upenyu hwavo hwebasa huchavandudzwa zvikuru, zvichitiunzira nyore zvikuru.