Dab tsi yogcoj chip? Yog li dab tsi yog nws cov yam ntxwv? LED nti kev tsim khoom yog tsim los tsim cov khoom siv hluav taws xob zoo thiab txhim khu kev qha uas tsis tshua muaj ohmic tiv tauj electrodes, ua tau raws li qhov me me voltage poob ntawm cov ntaub ntawv tiv tauj, muab cov ntaub qhwv siab rau vuam hlau, thiab tawm lub teeb kom ntau li ntau tau. Txoj kev hloov zaj duab xis feem ntau yog siv txoj kev nqus evaporation. Nyob rau hauv 4pa lub tshuab nqus tsev siab, cov khoom yog melted los ntawm cov cua kub tsis kam los yog electron beam bombardment cua sov txoj kev, thiab bZX79C18 ua hlau vapor thiab tso rau ntawm qhov chaw ntawm cov khoom semiconductor nyob rau hauv qis siab.

Feem ntau, p-hom kev sib cuag hlau siv suav nrog Aube, auzn thiab lwm yam alloys, thiab n-sab tiv tauj hlau feem ntau siv AuGeNi alloy. Cov txheej txheem sib cuag ntawm cov electrode thiab cov txheej txheej txheej txheej tuaj yeem ua tau raws li cov txheej txheem lithography. Tom qab cov txheej txheem photolithography, nws kuj yog los ntawm cov txheej txheem alloying, uas feem ntau yog ua los ntawm kev tiv thaiv H2 lossis N2. Lub sij hawm alloying thiab kub feem ntau yog txiav txim siab raws li cov yam ntxwv ntawm cov khoom siv semiconductor thiab daim ntawv ntawm lub cub tawg. Yog lawm, yog tias cov txheej txheem nti electrode xws li xiav thiab ntsuab yog qhov nyuaj dua, kev loj hlob ntawm zaj duab xis passive thiab plasma etching txheej txheem yuav tsum tau ntxiv.

Hauv kev tsim cov txheej txheem ntawm LED nti, cov txheej txheem twg muaj feem cuam tshuam rau nws cov kev ua haujlwm photoelectric?

Feem ntau hais lus, tom qab ua tiav ntawmLED epitaxial ntau lawm, nws cov khoom siv hluav taws xob tseem ceeb tau ua tiav, thiab kev tsim cov nti yuav tsis hloov nws cov xwm txheej nuclear, tab sis cov xwm txheej tsis raug hauv cov txheej txheem txheej thiab alloying yuav ua rau qee qhov tsis zoo hluav taws xob. Piv txwv li, tsis tshua muaj siab los yog siab alloying kub yuav ua rau tsis zoo ohmic kev sib cuag, uas yog lub ntsiab yog vim li cas rau lub siab rau pem hauv ntej voltage poob VF nyob rau hauv nti manufacturing. Tom qab txiav, yog tias qee cov txheej txheem corrosion tau ua nyob rau ntawm ntug ntawm lub nti, nws yuav pab tau kom txhim kho qhov thim rov qab ntawm cov nti. Qhov no yog vim hais tias tom qab txiav nrog lub pob zeb diamond sib tsoo log hniav, ntau cov khib nyiab thiab hmoov yuav nyob twj ywm ntawm ntug ntawm nti. Yog tias cov no tau daig rau PN kev sib tshuam ntawm LED nti, lawv yuav ua rau hluav taws xob xau thiab txawm tias tawg. Tsis tas li ntawd, yog hais tias lub photoresist ntawm lub nti nto tsis stripped huv si, nws yuav ua rau muaj teeb meem nyob rau hauv pem hauv ntej welding thiab cuav welding. Yog tias nws nyob tom qab, nws tseem yuav ua rau muaj kev poob siab. Nyob rau hauv cov txheej txheem ntawm nti ntau lawm, lub teeb siv tau zoo tuaj yeem txhim kho los ntawm coarsening ntawm qhov chaw thiab faib nws mus rau hauv inverted trapezoidal qauv.

Vim li cas LED chips yuav tsum tau muab faib ua ntau qhov sib txawv? Dab tsi yog qhov cuam tshuam ntawm qhov loj me ntawm kev ua haujlwm photoelectric ntawm LED?

LED nti loj tuaj yeem muab faib ua lub zog qis, nruab nrab lub zog nti thiab lub zog siab nti raws li lub zog. Raws li cov neeg siv khoom xav tau, nws tuaj yeem muab faib ua theem ib leeg, qib digital, qib dot matrix thiab cov teeb pom kev zoo nkauj. Raws li rau qhov tshwj xeeb loj ntawm cov nti, nws tau txiav txim siab raws li qhov tseeb ntawm qib ntau lawm ntawm cov tuam txhab chip sib txawv, thiab tsis muaj qhov tshwj xeeb yuav tsum tau ua. Ntev npaum li cov txheej txheem dhau mus, cov nti tuaj yeem txhim kho cov khoom tsim tawm thiab txo tus nqi, thiab kev ua haujlwm photoelectric yuav tsis hloov pauv hauv paus. Kev siv tam sim no ntawm cov nti yog qhov muaj feem xyuam nrog qhov ceev tam sim no ntws los ntawm cov nti. Thaum lub nti me me, kev siv tam sim no me me, thiab thaum lub nti loj, qhov siv tam sim no loj. Lawv chav tsev tam sim no ceev yog qhov qub. Xav txog tias cov cua kub dissipation yog qhov teeb meem tseem ceeb nyob rau hauv siab tam sim no, nws cov luminous efficiency yog qis dua qhov qis tam sim no. Ntawm qhov tod tes, raws li cheeb tsam nce, lub cev tsis kam ntawm cov nti yuav txo qis, yog li lub zog rau pem hauv ntej yuav txo qis.

Dab tsi yog thaj tsam ntawm LED high-power nti? Vim li cas?

Led high-power chipsrau lub teeb dawb yog feem ntau txog 40mil hauv khw. Qhov kev siv lub zog ntawm cov chips siab zog feem ntau yog hais txog lub zog hluav taws xob ntau dua 1W. Txij li thaum quantum efficiency feem ntau tsawg dua 20%, feem ntau ntawm cov hluav taws xob hluav taws xob yuav hloov mus rau hauv lub zog hluav taws xob, yog li cov cua kub dissipation ntawm high-power nti yog ib qho tseem ceeb heev, thiab cov nti yuav tsum muaj thaj tsam loj.

Dab tsi yog qhov sib txawv ntawm cov cuab yeej technology thiab cov cuab yeej ua haujlwm rau kev tsim cov khoom siv GaN epitaxial piv nrog qhov sib txawv, GaAs thiab InGaAlP? Vim li cas?

Lub substrates ntawm LED liab thiab daj chips thiab ci Quad liab thiab daj chips yog ua los ntawm cov khoom siv semiconductor xws li qhov sib txawv thiab GaAs, uas feem ntau tuaj yeem ua rau n-hom substrates. Cov txheej txheem ntub dej yog siv rau lithography, thiab tom qab ntawd cov pob zeb diamond sib tsoo log hniav yog siv los txiav cov nti. Lub xiav-ntsuab nti ntawm GaN cov khoom yog sapphire substrate. Vim tias sapphire substrate yog insulated, nws tsis tuaj yeem siv los ua ib tus ncej ntawm LED. Nws yog ib qho tsim nyog los ua p / N electrodes ntawm qhov chaw epitaxial tib lub sijhawm los ntawm cov txheej txheem qhuav etching, thiab qee cov txheej txheem passivation. Vim tias sapphire nyuaj heev, nws nyuaj rau kos cov chips nrog pob zeb diamond sib tsoo log hniav. Nws cov txheej txheem thev naus laus zis feem ntau yog ntau thiab nyuaj dua li ntawm LED ua los ntawm qhov sib txawv thiab GaAs cov ntaub ntawv.

Dab tsi yog cov qauv thiab cov yam ntxwv ntawm "pob tshab electrode" nti?

Lub thiaj li hu ua pob tshab electrode yuav tsum yog conductive thiab pob tshab. Cov khoom no yog tam sim no dav siv nyob rau hauv cov kua siv lead ua kua txheej txheem. Nws lub npe yog indium tin oxide, uas yog abbreviated li ITO, tab sis nws yuav siv tsis tau raws li ib tug solder ncoo. Thaum lub sij hawm tsim, ohmic electrode yuav tsum tau ua nyob rau saum npoo ntawm cov nti, ces ib txheej ntawm ITO yuav tsum tau them rau saum npoo, thiab ces ib txheej ntawm vuam ncoo yuav tsum tau plated nyob rau hauv ITO nto. Nyob rau hauv txoj kev no, tam sim no los ntawm cov hlau lead yog sib npaug rau txhua ohmic contact electrode los ntawm ITO txheej. Nyob rau tib lub sij hawm, vim hais tias lub refractive index ntawm ITO yog nyob nruab nrab ntawm lub refractive index ntawm huab cua thiab epitaxial khoom, lub teeb lub kaum sab xis tuaj yeem txhim kho thiab luminous flux tuaj yeem nce ntxiv.

Dab tsi yog lub ntsiab ntawm chip technology rau semiconductor teeb pom kev zoo?

Nrog rau txoj kev loj hlob ntawm semiconductor LED technology, nws daim ntawv thov nyob rau hauv lub tshav pob ntawm lub teeb pom kev zoo yog ntau thiab ntau, tshwj xeeb tshaj yog qhov tshwm sim ntawm dawb LED tau dhau los ua qhov chaw kub ntawm semiconductor teeb pom kev zoo. Txawm li cas los xij, qhov tseem ceeb nti thiab ntim tshuab yuav tsum tau txhim kho. Nyob rau hauv cov nqe lus ntawm nti, peb yuav tsum txhim kho mus rau siab zog, siab luminous efficiency thiab txo thermal kuj. Kev nce lub zog txhais tau hais tias kev siv tam sim no ntawm cov nti tau nce. Txoj kev ncaj tshaj yog ua kom lub nti loj. Tam sim no cov khoom siv hluav taws xob ntau yog 1mm × 1mm los yog li ntawd, thiab cov kev khiav hauj lwm tam sim no yog 350mA Vim qhov nce ntawm kev siv tam sim no, cov teeb meem kub dissipation tau dhau los ua qhov teeb meem tseem ceeb. Tam sim no qhov teeb meem no yeej daws tau los ntawm txoj kev ntawm nti flip. Nrog rau txoj kev loj hlob ntawm LED technology, nws daim ntawv thov nyob rau hauv lub tshav pob ntawm teeb pom kev zoo yuav ntsib ib tug unprecedented lub sij hawm thiab kev sib tw.

Dab tsi yog flip chip? Nws cov qauv yog dab tsi? Nws qhov zoo yog dab tsi?

Blue LED feem ntau txais Al2O3 substrate. Al2O3 substrate muaj siab hardness thiab thermal conductivity tsawg. Yog tias nws siv cov qauv tsim, ntawm ib sab, nws yuav coj teeb meem tiv thaiv zoo li qub; ntawm qhov tod tes, cov cua kub dissipation kuj yuav dhau los ua teeb meem loj nyob rau hauv siab tam sim no. Nyob rau tib lub sijhawm, vim tias cov electrode pem hauv ntej nce siab, qee lub teeb yuav raug thaiv, thiab cov luminous efficiency yuav raug txo. Lub zog muaj zog xiav LED tuaj yeem tau txais lub teeb pom kev zoo dua los ntawm kev siv tshuab chip flip chip dua li cov tshuab ntim khoom.

Tam sim no, lub ntsiab flip nti qauv txoj kev yog: ua ntej, npaj ib tug loj-loj xiav LED nti nrog eutectic vuam electrode, npaj ib tug silicon substrate me ntsis loj dua lub xiav LED nti, thiab ua ib tug kub conductive txheej thiab coj tawm hlau txheej ( ultrasonic kub hlau pob solder sib koom) rau eutectic vuam ntawm nws. Tom qab ntawd, lub zog loj xiav LED nti thiab silicon substrate yog welded ua ke los ntawm eutectic vuam khoom.

Cov yam ntxwv ntawm cov qauv no yog tias txheej epitaxial yog nyob rau hauv kev sib cuag ncaj qha nrog silicon substrate, thiab thermal kuj ntawm silicon substrate yog qis dua li ntawm sapphire substrate, yog li qhov teeb meem ntawm tshav kub dissipation yog zoo daws. Vim tias sapphire substrate tig mus rau pem hauv ntej tom qab flip mounting, nws dhau los ua lub teeb emitting nto, thiab sapphire yog pob tshab, yog li qhov teeb meem emitting tseem daws tau. Cov saum toj no yog cov kev paub txog LED technology. Kuv ntseeg tias nrog kev txhim kho ntawm kev tshawb fawb thiab thev naus laus zis, lub teeb ci LED yav tom ntej yuav ua tau zoo dua, thiab kev pabcuam lub neej yuav zoo dua qub, uas yuav ua rau peb yooj yim dua.