Nikichip? Ni ibihe bintu biranga? LED chip ikora cyane cyane kugirango ikore electrode ikora neza kandi yizewe, ihure na voltage ntoya ugereranije nibikoresho bishobora guhura, itanga igitutu cyinsinga zo gusudira, kandi itanga urumuri rushoboka. Inzira yinzibacyuho ya firime ikoresha uburyo bwa vacuum evaporation. Munsi ya 4pa icyuho kinini, ibikoresho bishongeshwa nubushyuhe bwo guhangana cyangwa uburyo bwo gushyushya amashanyarazi ya elegitoronike, hanyuma bZX79C18 ihinduka imyuka yicyuma igashyirwa hejuru yibikoresho bya semiconductor munsi yumuvuduko muke.

Mubisanzwe, p-ubwoko bwicyuma gikoreshwa gikoreshwa harimo Aube, auzn nandi mavuta, kandi icyuma n-cyuma gihura akenshi gifata AuGeNi. Ihuza rya electrode hamwe na alloy layer igaragara irashobora kuzuza neza ibisabwa mubikorwa bya lithographie. Nyuma yuburyo bwa Photolithography, ni no muburyo bwo kuvanga, ubusanzwe bikorwa mukurinda H2 cyangwa N2. Igihe cyogususurutsa hamwe nubushuhe mubisanzwe bigenwa ukurikije ibiranga ibikoresho bya semiconductor nuburyo bwitanura rya alloy. Byumvikane ko, niba chip electrode ikora nkubururu nicyatsi bigoye cyane, gukura kwa pasiporo ya pasiporo hamwe na plasma yogukora bigomba kongerwamo.

Mubikorwa byo gukora chip ya LED, niyihe nzira igira ingaruka zikomeye kumikorere yifoto yamashanyarazi?

Muri rusange tuvuze, nyuma yo kurangizaLED epitaxial umusaruro, ibikoresho byingenzi byamashanyarazi byararangiye, kandi gukora chip ntibizahindura imiterere ya kirimbuzi, ariko imiterere idakwiye mugikorwa cyo gutwika no kuvanga bizatera ibipimo bibi byamashanyarazi. Kurugero, ubushyuhe buke cyangwa buke buvanze bizatera imikoranire mibi ya ohmic, niyo mpamvu nyamukuru itera umuvuduko mwinshi wa voltage ugabanuka VF mugukora chip. Nyuma yo gukata, niba inzira zimwe zo kwangirika zikorwa kumpera ya chip, bizafasha kunoza imyuka iva inyuma. Ibi ni ukubera ko nyuma yo gukata hamwe nicyuma gisya cya diyama, imyanda nifu ninshi bizaguma kumpera ya chip. Niba ibi byiziritse kuri PN ihuza chip ya LED, bizatera amashanyarazi ndetse no gusenyuka. Byongeye kandi, niba uwifotora hejuru ya chip adakuweho isuku, bizatera ingorane zo gusudira imbere no gusudira ibinyoma. Niba iri inyuma, bizatera kandi umuvuduko ukabije. Mubikorwa byo gukora chip, ubukana bwurumuri burashobora kunozwa muguhuza ubuso no kubigabanyamo imiterere ya trapezoidal.

Kuki chip ya LED igomba kugabanwa mubunini butandukanye? Ni izihe ngaruka z'ubunini ku mikorere y'amafoto ya LED?

Ingano ya LED irashobora kugabanywamo amashanyarazi make, chip yo hagati hamwe na chip ikomeye cyane ukurikije ingufu. Ukurikije ibyo umukiriya asabwa, irashobora kugabanywa murwego rumwe, urwego rwa digitale, urwego rwa dot matrix no kumurika. Kubijyanye nubunini bwihariye bwa chip, bugenwa ukurikije urwego nyarwo rwo gukora ibicuruzwa bitandukanye bikora chip, kandi nta bisabwa byihariye. Igihe cyose inzira irangiye, chip irashobora kunoza umusaruro wibice no kugabanya ikiguzi, kandi imikorere yifoto ntishobora guhinduka cyane. Gukoresha imiyoboro ya chip mubyukuri bifitanye isano nubucucike bugenda butemba. Iyo chip ari nto, ikoreshwa ryubu ni rito, kandi iyo chip nini, ikoreshwa ryubu ni rinini. Ubucucike bwibice byabo muri rusange ni bimwe. Urebye ko gukwirakwiza ubushyuhe aricyo kibazo nyamukuru munsi yumuyaga mwinshi, imikorere yacyo ya luminous iri munsi yicy'umuyaga muke. Kurundi ruhande, uko agace kiyongera, kurwanya umubiri kwa chip bizagabanuka, bityo imbere kuri voltage izagabanuka.

Ni ubuhe buso bwa LED ifite ingufu nyinshi? Kubera iki?

Yayoboye amashanyarazi akomeyekuko urumuri rwera muri rusange hafi 40mil kumasoko. Ibyo bita gukoresha imbaraga za chip-power-power muri rusange bivuga ingufu z'amashanyarazi zirenga 1W. Kubera ko kwant ikora neza muri rusange iri munsi ya 20%, ingufu nyinshi zamashanyarazi zizahinduka ingufu zubushyuhe, bityo rero gukwirakwiza ubushyuhe bwa chip ifite ingufu nyinshi ni ngombwa cyane, kandi chip isabwa kugira ahantu hanini.

Nibihe bisabwa bitandukanye byikoranabuhanga rya chip nibikoresho byo gutunganya ibikoresho bya GaN epitaxial ugereranije nicyuho, GaAs na InGaAlP? Kubera iki?

Substrates ya LED isanzwe itukura n'umuhondo hamwe na Quad itukura ya Quad itukura n'umuhondo ikozwe mubikoresho bya semiconductor bivanze nkibyuho na GaAs, mubisanzwe bishobora gukorwa muburyo bwa n-substrate. Inzira itose ikoreshwa mugukoresha lithographie, hanyuma icyuma gisya diyama gikoreshwa mugukata chip. Chip yubururu-icyatsi cyibikoresho bya GaN nubutaka bwa safiro. Kuberako insina ya safiro ikingiwe, ntishobora gukoreshwa nkinkingi imwe ya LED. Birakenewe gukora electrode ya p / N hejuru ya epitaxial icyarimwe binyuze muburyo bwumye, hamwe na passivation inzira. Kuberako safiro ikomeye cyane, biragoye gushushanya chip hamwe na diyama yo gusya. Ibikorwa byikoranabuhanga muri rusange biragoye kandi biragoye kuruta ibya LED bikozwe mu cyuho nibikoresho bya GaAs.

Ni ubuhe buryo n'ibiranga chip ya "transparent electrode"?

Ibyo bita electrode ibonerana igomba kuba ikora kandi ikorera mu mucyo. Ibi bikoresho ubu bikoreshwa cyane muburyo bwo gukora ibintu bya kristu. Izina ryayo ni indium tin oxide, mu magambo ahinnye yitwa ITO, ariko ntishobora gukoreshwa nka padi. Mugihe cyo guhimba, electrode ya ohmic igomba gukorwa hejuru ya chip, hanyuma igipande cya ITO kigapfundikirwa hejuru, hanyuma igipande cyo gusudira kigashyirwa hejuru ya ITO. Muri ubu buryo, ikigezweho kiva ku isonga gikwirakwizwa kuri buri ohmic contact electrode binyuze muri ITO. Muri icyo gihe, kubera ko indangantego ya ITO iri hagati yikigereranyo cyo guhumeka ikirere hamwe nibikoresho bya epitaxial, inguni yumucyo irashobora kunozwa kandi urumuri rwinshi rushobora kwiyongera.

Ni ubuhe buryo bukuru bwa tekinoroji ya chip yo kumurika igice cya kabiri?

Hamwe niterambere ryikoranabuhanga rya semiconductor LED, ikoreshwa ryayo murwego rwo kumurika ni byinshi, cyane cyane kugaragara kwa LED yera byahindutse ahantu hashyushye kumurika. Nyamara, urufunguzo rwa chip hamwe nikoranabuhanga ryo gupakira bigomba kunozwa. Kubijyanye na chip, dukwiye kwiteza imbere tugana imbaraga nyinshi, gukora neza cyane no kugabanya ubushyuhe bwumuriro. Kongera imbaraga bivuze ko imikoreshereze ya chip yiyongereye. Inzira itaziguye ni ukongera ubunini bwa chip. Noneho amashanyarazi asanzwe afite ingufu nyinshi ni 1mm × 1mm cyangwa irenga, kandi amashanyarazi akora ni 350mA Kubera ubwiyongere bwikoreshwa ryikoreshwa, ikibazo cyo gukwirakwiza ubushyuhe cyabaye ikibazo gikomeye. Noneho iki kibazo gikemurwa muburyo bwa chip flip. Hamwe niterambere rya tekinoroji ya LED, kuyikoresha mubijyanye no kumurika bizahura n'amahirwe atigeze abaho.

Flip chip ni iki? Imiterere yayo ni iyihe? Ni izihe nyungu zayo?

Ubururu LED busanzwe ifata Al2O3 substrate. Al2O3 substrate ifite ubukana bwinshi nubushyuhe buke bwumuriro. Niba ifata imiterere, kuruhande rumwe, izazana ibibazo birwanya static; kurundi ruhande, ubushyuhe bwo kugabanuka nabwo buzaba ikibazo gikomeye munsi yumuyaga mwinshi. Igihe kimwe, kubera ko electrode yimbere iri hejuru, urumuri runaka ruzahagarikwa, kandi imikorere yumucyo izagabanuka. Imbaraga nyinshi z'ubururu LED zirashobora kubona urumuri rwiza cyane binyuze muri chip flip chip tekinoroji kuruta tekinoroji yo gupakira.

Kugeza ubu, uburyo bukuru bwa flip chip yuburyo nuburyo: ubanza, tegura chip nini yubururu LED yubururu hamwe na eutectic welding electrode, tegura insimburangingo ya silicon nini gato ugereranije na chip yubururu LED, hanyuma ukore urwego ruyobora zahabu hanyuma usohokane urwego rwinsinga ( ultrasonic zahabu wire umupira ugurisha hamwe) kuri eutectic gusudira kuri yo. Noneho, amashanyarazi menshi yubururu LED chip hamwe na silicon substrate irasudira hamwe nibikoresho byo gusudira eutectic.

Ikiranga iyi miterere ni uko epitaxial layer iba ihuye neza na substrate ya silicon, kandi ubushyuhe bwumuriro wa silicon substrate iri munsi cyane ugereranije nubwa safiro, bityo ikibazo cyo gukwirakwiza ubushyuhe gikemutse neza. Kuberako amabuye ya safiro areba hejuru nyuma yo kwishyiriraho flip, ihinduka ubuso busohora urumuri, na safiro ikabonerana, bityo ikibazo cyo gutanga urumuri nacyo kirakemuka. Ibyavuzwe haruguru nubumenyi bujyanye na tekinoroji ya LED. Nizera ko hamwe niterambere ryubumenyi nubuhanga, amatara ya LED azaza azarushaho gukora neza, kandi ubuzima bwa serivisi buzatera imbere cyane, bizatworohereza kurushaho.