NikiLED chip? Ni ibihe bintu biranga?Gukora chipni cyane cyane gukora neza kandi yizewe ya ohm ihuza electrode, ihura nigabanuka rito ugereranije nigitigiri kiri hagati yibikoresho bishobora guhura, gutanga igitutu cyumuvuduko wo gusudira, kandi mugihe kimwe, urumuri rushoboka. Inzira yinzibacyuho ikoresha uburyo bwa vacuum evaporation. Munsi ya 4Pa icyuho kinini, ibikoresho bishongeshwa nubushyuhe bwo kurwanya cyangwa gushyushya ibisasu bya elegitoronike, hanyuma BZX79C18 ihinduka umwuka wibyuma kugirango ubishyire hejuru yibikoresho bya semiconductor munsi yumuvuduko muke.

Ibyuma bikoreshwa cyane muburyo bwa P harimo AuBe, AuZn nandi mavuta, kandi ibyuma byo guhuza kuruhande rwa N-kuruhande ni AuGeNi. Igice cya alloy gikozwe nyuma yo gutwikirwa nacyo kigomba kwerekana ahantu hacye cyane hashoboka hifashishijwe fotolitografiya, kugirango igisigara gisigaye gishobora kuzuza ibisabwa byingirakamaro kandi yizewe ya ohm ihuza electrode hamwe nu murongo wo gusudira. Nyuma yo gufotora birangiye, inzira yo kuvanga igomba gukorwa kurinda H2 cyangwa N2. Igihe nubushyuhe bwo kuvanga mubisanzwe bigenwa ukurikije ibiranga ibikoresho bya semiconductor nuburyo bw itanura rya alloy. Byumvikane ko, niba chip electrode ikora nkubururu-icyatsi kibisi iraruhije, gukura kwa passiyo ya pasiporo hamwe na plasma yogukora bigomba kongerwamo.

Mubikorwa byo gukora chip ya LED, ni ubuhe buryo bugira ingaruka zikomeye kumikorere yabwo?

Muri rusange, nyuma yo kurangiza umusaruro wa LED epitaxial, ibikorwa byingenzi byamashanyarazi byarangiye. Gukora chip ntabwo bizahindura imiterere yumusaruro wibanze, ariko imiterere idakwiye mugutwikira no kuvanga bizatera ibice bimwe byamashanyarazi kuba mibi. Kurugero, ubushyuhe buke cyangwa buke buvanze bizatera imikoranire mibi ya ohmic, niyo mpanvu nyamukuru yo kugabanuka kwinshi kwa voltage igabanuka VF mugukora chip. Nyuma yo gukata, niba hari uburyo bwo gutobora bukozwe ku nkombe ya chip, bizafasha kunoza imyuka ihindagurika. Ibi ni ukubera ko nyuma yo gukata hamwe na diyama yo gusya uruziga, hazaba ifu yimyanda myinshi isigaye kuruhande rwa chip. Niba ibyo bice bifatanye na PN ihuza chip ya LED, bizatera amashanyarazi, cyangwa gusenyuka. Byongeye kandi, niba uwifotora hejuru ya chip adakuweho neza, bizatera ingorane muguhuza insinga imbere no kugurisha ibinyoma. Niba ari inyuma, bizanatera umuvuduko ukabije. Muburyo bwo gukora chip, ubukana bwumucyo burashobora kunozwa hifashishijwe uburyo bwo hejuru no gukata muburyo bwa trapezoid.

Kuki chip ya LED igabanijwemo ubunini butandukanye? Ni izihe ngaruka z'ubunini kuriLED yamashanyaraziimikorere?

Ingano ya LED irashobora kugabanywamo amashanyarazi mato mato, amashanyarazi yo hagati hamwe na chip nini cyane ukurikije ingufu. Ukurikije ibyo umukiriya asabwa, irashobora kugabanywa murwego rumwe, urwego rwa digitale, urwego rwa lattice hamwe no kumurika imitako nibindi byiciro. Ingano yihariye ya chip iterwa nurwego nyirizina rwo gukora ibicuruzwa bitandukanye, kandi nta bisabwa byihariye. Igihe cyose inzira yujuje ibyangombwa, chip irashobora kuzamura umusaruro wibice no kugabanya ikiguzi, kandi imikorere yifoto ntizahinduka muburyo bukomeye. Umuyoboro ukoreshwa na chip mubyukuri ufitanye isano nubucucike buri muri chip. Umuyoboro ukoreshwa na chip ni muto kandi nubu ikoreshwa na chip nini. Ibice byabo byubu birasa cyane. Urebye ko gukwirakwiza ubushyuhe aricyo kibazo nyamukuru munsi yumuyaga mwinshi, imikorere yacyo yumucyo iri munsi yibyo munsi yumuyaga muke. Kurundi ruhande, uko akarere kiyongera, ingano irwanya chip izagabanuka, bityo voltage yimbere ikagabanuka.

Ni ubuhe bwoko bwa chip chip ya LED ifite ingufu nyinshi muri rusange? Kubera iki?

LED ifite ingufu nyinshi zikoreshwa mu mucyo wera zishobora kugaragara ku isoko nko muri kilometero 40, kandi ibyo bita chip-power power muri rusange bivuze ko amashanyarazi arenze 1W. Kubera ko kwant ikora neza muri rusange iri munsi ya 20%, ingufu nyinshi zamashanyarazi zizahinduka ingufu zubushyuhe, bityo rero gukwirakwiza ubushyuhe bwa chip-power nini ni ngombwa cyane, bisaba ahantu hanini cyane.

Nibihe bisabwa bitandukanye mubikorwa bya chip nibikoresho byo gutunganya ibikoresho bya GaN epitaxial ugereranije na GaP, GaAs na InGaAlP? Kubera iki?

Substrates ya LED isanzwe itukura n'umuhondo hamwe na quaternary itukura yumutuku n'umuhondo bikozwe muri GaP, GaAs nibindi bikoresho byifashishwa bya semiconductor, mubisanzwe bishobora gukorwa muburyo bwa N. Inzira itose ikoreshwa mugufotora, hanyuma icyuma cya diyama ikoreshwa mugukata uduce. Chip yubururu-icyatsi cyibikoresho bya GaN nubutaka bwa safiro. Kuberako insina ya safiro ikingiwe, ntishobora gukoreshwa nkinkingi ya LED. Electrode ya P / N igomba gukorwa hejuru ya epitaxial icyarimwe ikoresheje inzira yumye kandi ikananyura muburyo bumwe na bumwe. Kuberako safiro iragoye cyane, biragoye guca chip hamwe na diyama yo gusya. Ibikorwa byayo mubisanzwe biragoye kuruta ibya GaP na GaAs LEDs.

Ni ubuhe buryo n'ibiranga chip ya “transparent electrode”?

Ibyo bita electrode ibonerana bigomba kuba bishobora gutwara amashanyarazi numucyo. Ibi bikoresho ubu bikoreshwa cyane mubikorwa byo gutunganya ibintu bya kristu. Izina ryayo ni Indium Tin Oxide (ITO), ariko ntishobora gukoreshwa nka paje yo gusudira. Mugihe cyo guhimba, electrode ya ohmic igomba gukorwa hejuru ya chip, hanyuma igipande cya ITO kigashyirwa 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 indangagaciro ya ITO iri hagati yikirere nigipimo cyo kugabanya ibintu bya epitaxial, inguni yumucyo irashobora kwiyongera, kandi urumuri rwinshi narwo rushobora kwiyongera.

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

Hamwe niterambere rya tekinoroji ya semiconductor LED, ikoreshwa ryayo murwego rwo kumurika ni byinshi, cyane cyane kugaragara kwa LED yera, byahindutse intumbero yo kumurika. Nyamara, urufunguzo rwibanze rwa chip hamwe nogupakira biracyakenewe kunozwa, kandi chip igomba gutezwa imbere igana ingufu nyinshi, imikorere yumucyo mwinshi hamwe nubushyuhe buke bwumuriro. Kongera imbaraga bivuze kongera ingufu zikoreshwa na chip. Inzira itaziguye ni ukongera ubunini bwa chip. Muri iki gihe, chip-power-power zose ni 1mm × 1mm, naho ikigezweho ni 350mA Kubera ubwiyongere bwikoreshwa ryikoreshwa, ikibazo cyo gukwirakwiza ubushyuhe cyabaye ikibazo gikomeye. Noneho iki kibazo cyakemuwe ahanini na chip flip. Hamwe niterambere rya tekinoroji ya LED, kuyikoresha murwego rwo kumurika bizahura n'amahirwe atigeze abaho.

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

Ubururu LED busanzwe bukoresha substrate ya Al2O3. Al2O3 substrate ifite ubukana bwinshi, ubushyuhe buke bwumuriro nubushobozi. Niba imiterere myiza ikoreshwa, kuruhande rumwe, bizatera ibibazo birwanya static, kurundi ruhande, gukwirakwiza ubushyuhe nabyo bizahinduka ikibazo gikomeye mubihe biri hejuru. Mugihe kimwe, kubera ko electrode yimbere ireba hejuru, igice cyumucyo kizahagarikwa, kandi imikorere yumucyo izagabanuka. Imbaraga nyinshi z'ubururu LED zishobora kubona urumuri rwiza kuruta tekinoroji yo gupakira hifashishijwe tekinoroji ya chip flip.

Inzira nyamukuru yuburyo bwa flip yuburyo ni: ubanza, tegura ubunini bunini bwa LED chip yubururu hamwe na electrode ikwiye yo gusudira, mugihe kimwe, tegura insimburangingo ya silicon nini gato ugereranije na chip yubururu LED, hanyuma utange urwego ruyobora zahabu hamwe ninsinga ziyobora layer (ultrasonic zahabu wire ball kugurisha hamwe) yo gusudira eutectic. Noneho, amashanyarazi menshi yubururu LED chip hamwe na silicon substrate irasudira hamwe hakoreshejwe ibikoresho byo gusudira eutectic.

Iyi miterere irangwa nuko epitaxial layer ihura neza na sisitemu ya silicon, kandi ubushyuhe bwumuriro wa silicon substrate iri munsi cyane ugereranije nubwa safiro, bityo ikibazo cyo gukwirakwiza ubushyuhe gikemutse neza. Kubera ko substrate ya safiro ireba hejuru nyuma yo guhinduka, ihinduka urumuri rusohora. Safiro iragaragara, ikibazo rero cyo gutanga urumuri nacyo kirakemutse. Ibyavuzwe haruguru nubumenyi bujyanye na tekinoroji ya LED. Nizera ko hamwe niterambere ryubumenyi nikoranabuhanga, amatara ya LED mugihe kizaza azarushaho gukora neza, kandi ubuzima bwabo bwa serivisi buzatera imbere cyane, bituzanira ubworoherane.