Dab tsi yog LED nti? Yog li dab tsi yog nws cov yam ntxwv? Kev tsim cov chips LED feem ntau yog tsom rau kev tsim cov khoom siv hluav taws xob zoo thiab txhim khu kev qha uas tsis tshua muaj ohmic contact electrodes, uas tuaj yeem ua tau raws li qhov me me voltage poob ntawm cov ntaub ntawv tiv tauj thiab muab cov ntaub qhwv, thaum emitting lub teeb ntau li ntau tau. Cov txheej txheem hloov cov zaj duab xis feem ntau siv lub tshuab nqus tsev evaporation. Nyob rau hauv 4Pa lub tshuab nqus tsev siab, cov khoom yog melted los ntawm cov cua kub tsis kam los yog hluav taws xob hluav taws xob foob hluav taws xob cua sov txoj kev, thiab BZX79C18 hloov mus rau hauv cov hlau vapor thiab tso rau saum npoo ntawm cov khoom semiconductor nyob rau hauv qis siab.
Feem ntau siv P-hom kev sib cuag hlau muaj xws li alloys xws li AuBe thiab AuZn, thaum N-sab tiv tauj hlau feem ntau yog ua los ntawm AuGeNi alloy. Cov txheej txheej alloy tsim tom qab txheej kuj yuav tsum tau nthuav tawm lub teeb-emitting cheeb tsam kom ntau li ntau tau los ntawm photolithography technology, thiaj li hais tias cov seem hlau txheej muaj peev xwm ua tau raws li qhov yuav tsum tau ntawm zoo thiab txhim khu kev qha uas tsis muaj ohmic hu electrodes thiab solder hlau pads. Tom qab cov txheej txheem photolithography tiav, cov txheej txheem alloying kuj tau ua, feem ntau yog nyob rau hauv kev tiv thaiv ntawm H2 lossis N2. Lub sij hawm thiab qhov kub thiab txias ntawm alloying feem ntau yog txiav txim siab los ntawm cov yam ntxwv xws li cov yam ntxwv ntawm cov khoom siv semiconductor thiab daim ntawv ntawm lub qhov cub alloy. Yog lawm, yog tias cov txheej txheem electrode rau xiav-ntsuab chips yog qhov nyuaj dua, kev loj hlob ntawm zaj duab xis passivation thiab plasma etching txheej txheem yuav tsum tau ntxiv.

Hauv kev tsim cov txheej txheem ntawm LED chips, cov txheej txheem twg muaj feem cuam tshuam rau lawv cov kev ua haujlwm optoelectronic?
Feem ntau hais lus, tom qab ua tiav ntawm LED epitaxial ntau lawm, nws cov khoom hluav taws xob tseem ceeb tau ua tiav, thiab kev tsim cov chips tsis hloov nws qhov tseem ceeb. Txawm li cas los xij, cov xwm txheej tsis tsim nyog thaum txheej txheej txheej thiab cov txheej txheem alloying tuaj yeem ua rau qee qhov tsis zoo hluav taws xob. Piv txwv li, tsis tshua muaj siab los yog siab alloying kub tuaj yeem ua rau tsis zoo ohmic kev sib cuag, uas yog lub ntsiab yog vim li cas rau siab rau pem hauv ntej voltage poob VF hauv nti manufacturing. Tom qab txiav, ua qee cov txheej txheem corrosion ntawm cov npoo ntawm cov nti tuaj yeem pab tau zoo hauv kev 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, yuav muaj ib tug loj npaum li cas ntawm cov khib nyiab hmoov seem ntawm ntug ntawm nti. Yog tias cov khoom no lo 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 tias lub photoresist ntawm lub nti yog tsis tev tawm kom huv si, nws yuav ua rau muaj teeb meem thiab virtual soldering ntawm cov kab hauv pem hauv ntej. Yog tias nws nyob tom qab, nws tseem yuav ua rau lub siab poob siab. Thaum lub sij hawm tsim cov txheej txheem nti, cov txheej txheem xws li nto roughening thiab txiav rau hauv inverted trapezoidal qauv tuaj yeem ua rau kom lub teeb ci.

Vim li cas LED chips muab faib ua ntau qhov sib txawv? Dab tsi yog qhov cuam tshuam ntawm qhov loj me ntawm kev ua haujlwm photoelectric ntawm LED?
Qhov loj ntawm LED chips tuaj yeem muab faib ua cov chips qis, nruab nrab lub zog chips, thiab cov chips siab zog raws li lawv lub zog. Raws li cov neeg siv khoom xav tau, nws tuaj yeem muab faib ua pawg xws li 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 nyob ntawm qhov tseeb ntau lawm qib ntawm cov chip manufacturers sib txawv thiab tsis muaj cov cai tshwj xeeb. Ntev npaum li cov txheej txheem ua tau raws li tus qauv, cov chips me tuaj yeem ua rau cov khoom tsim tawm thiab txo cov nqi, thiab qhov kev ua tau zoo ntawm optoelectronic yuav tsis raug hloov pauv. Qhov tam sim no siv los ntawm ib lub nti yog qhov muaj feem xyuam nrog qhov ceev tam sim no ntws los ntawm nws. Lub nti me me siv tsawg dua tam sim no, thaum lub nti loj siv tam sim no ntau dua. Lawv chav tsev tam sim no ceev yog qhov qub. Xav tias qhov 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, uas ua rau txo qis hauv qhov hluav taws xob txuas mus tom ntej.

Dab tsi yog thaj tsam ntawm LED high-power chips? Vim li cas?
LED high-power chips siv rau lub teeb dawb yog feem ntau muaj nyob rau hauv kev ua lag luam nyob ib ncig ntawm 40mil, thiab lub hwj chim noj ntawm high-power chips feem ntau yog hais txog hluav taws xob hwj chim saum 1W. Vim qhov tseeb tias quantum efficiency feem ntau tsawg dua 20%, feem ntau cov hluav taws xob hluav taws xob tau hloov mus rau hauv lub zog hluav taws xob, yog li cov cua kub dissipation ntawm high-power chips yog ib qho tseem ceeb heev thiab yuav tsum tau chips kom muaj thaj tsam loj.

Dab tsi yog qhov sib txawv ntawm cov txheej txheem nti thiab cov cuab yeej ua haujlwm rau kev tsim GaN epitaxial cov ntaub ntawv piv rau GaP, GaAs, thiab InGaAlP? Vim li cas?
Lub substrates ntawm LED liab thiab daj chips thiab siab brightness quaternary liab thiab daj chips yog ua los ntawm compound semiconductor cov ntaub ntawv xws li GaP thiab GaAs, thiab feem ntau tuaj yeem ua rau hauv N-hom substrates. Cov txheej txheem ntub dej yog siv rau photolithography, thiab tom qab ntawd pob zeb diamond sib tsoo log hniav yog siv los txiav rau hauv chips. Lub xiav-ntsuab nti ua los ntawm cov khoom siv GaN siv lub sapphire substrate. Vim lub insulating xwm ntawm sapphire substrate, nws yuav siv tsis tau raws li ib tug electrode ntawm lub LED. Yog li ntawd, ob qho tib si P / N electrodes yuav tsum tau tsim ib txhij ntawm lub epitaxial nto los ntawm cov txheej txheem qhuav etching, thiab qee cov txheej txheem passivation yuav tsum tau ua. Vim lub hardness ntawm sapphire, nws yog ib qhov nyuaj rau txiav nws mus rau hauv tej daim nrog ib tug pob zeb diamond sib tsoo log hniav. Nws cov txheej txheem tsim khoom feem ntau yog qhov nyuaj thiab sib txawv dua li LEDs ua los ntawm GaP lossis GaAs cov ntaub ntawv.

Cov qauv thiab cov yam ntxwv ntawm "pob tshab electrode" nti yog dab tsi?
Lub thiaj li hu ua pob tshab electrode yuav tsum yog conductive thiab pob tshab. Cov khoom no yog tam sim no siv dav hauv cov txheej txheem ua kua siv lead ua kua, thiab nws lub npe yog indium tin oxide, abbreviated li ITO, tab sis nws tsis tuaj yeem siv los ua cov ntaub qhwv. Thaum ua, ua ntej ua ib qho ohmic electrode nyob rau saum npoo ntawm cov nti, tom qab ntawd npog lub npoo nrog ib txheej ntawm ITO thiab phaj ib txheej ntawm solder ncoo rau ntawm ITO nto. Nyob rau hauv txoj kev no, tam sim no los ntawm cov hlau lead yog sib npaug zos rau txhua ohmic contact electrode los ntawm ITO txheej. Nyob rau tib lub sijhawm, ITO, vim nws qhov ntsuas qhov ntsuas tsis zoo nyob nruab nrab ntawm huab cua thiab cov ntaub ntawv epitaxial, tuaj yeem ua rau lub kaum sab xis ntawm lub teeb emission thiab cov luminous flux.

Dab tsi yog qhov kev loj hlob tseem ceeb ntawm chip technology rau semiconductor teeb pom kev zoo?
Nrog rau kev txhim kho ntawm semiconductor LED thev naus laus zis, nws daim ntawv thov hauv kev teeb pom kev zoo kuj nce ntxiv, tshwj xeeb tshaj yog qhov tshwm sim ntawm cov LED dawb, uas tau dhau los ua cov ntsiab lus kub hauv semiconductor teeb pom kev zoo. Txawm li cas los xij, cov txheej txheem tseem ceeb thiab ntim cov thev naus laus zis tseem yuav tsum tau txhim kho, thiab hais txog cov chips, peb yuav tsum tau txhim kho rau lub zog siab, kev ua haujlwm siab lub teeb, thiab txo cov thermal tsis kam. Kev ua kom muaj zog txhais tau hais tias qhov nce ntawm qhov tam sim no siv los ntawm cov nti, thiab txoj hauv kev ncaj nraim yog ua kom cov nti loj. Feem ntau siv cov chips siab zog yog nyob ib ncig ntawm 1mm × 1mm, nrog rau tam sim no ntawm 350mA. Vim qhov nce ntawm kev siv tam sim no, cov cua kub dissipation tau dhau los ua qhov teeb meem tseem ceeb, thiab tam sim no qhov teeb meem no tau raug daws los ntawm txoj kev nti inversion. Nrog rau txoj kev loj hlob ntawm LED thev naus laus zis, nws daim ntawv thov hauv kev teeb pom kev zoo yuav ntsib txoj hauv kev thiab cov teeb meem uas tsis tau muaj dua.

Dab tsi yog "flip chip"? Nws cov qauv yog dab tsi? Nws qhov zoo yog dab tsi?
Xiav LED feem ntau siv Al2O3 substrate, uas muaj siab hardness, tsawg thermal thiab hluav taws xob conductivity. Yog tias siv cov qauv zoo, nws yuav ua rau muaj teeb meem tiv thaiv zoo li qub ntawm ib sab, thiab ntawm qhov tod tes, cov cua sov dissipation kuj yuav dhau los ua qhov teeb meem loj hauv cov xwm txheej tam sim no. Lub caij no, vim qhov zoo electrode tig mus rau sab saud, ib feem ntawm lub teeb yuav raug thaiv, uas ua rau txo qis hauv luminous efficiency. Lub zog muaj zog xiav LED tuaj yeem ua tiav lub teeb pom kev zoo dua los ntawm kev siv tshuab chip inversion dua li cov tshuab ntim khoom.
Lub ntsiab inverted qauv txoj kev tam sim no yog ua ntej npaj loj-loj xiav LED chips nrog haum eutectic soldering electrodes, thiab nyob rau tib lub sij hawm npaj ib tug me ntsis loj silicon substrate tshaj lub xiav LED nti, thiab ces ua ib tug kub conductive txheej thiab coj tawm hlau. txheej (ultrasonic kub hlau pob solder sib koom) rau eutectic soldering rau nws. Tom qab ntawd, lub zog loj xiav LED nti yog soldered rau silicon substrate siv eutectic soldering khoom.
Cov yam ntxwv ntawm cov qauv no yog tias cov txheej txheem epitaxial ncaj qha hu rau silicon substrate, thiab thermal resistance ntawm silicon substrate yog qis dua li ntawm sapphire substrate, yog li qhov teeb meem ntawm tshav kub dissipation yog zoo daws. Vim lub inverted sapphire substrate tig mus rau sab saud, nws dhau los ua lub teeb emitting nto, thiab sapphire yog pob tshab, yog li daws qhov teeb meem ntawm lub teeb emission. Cov saum toj no yog cov kev paub txog LED technology. Peb ntseeg tias nrog kev txhim kho ntawm kev tshawb fawb thiab thev naus laus zis, lub teeb LED yav tom ntej yuav ua kom muaj txiaj ntsig zoo thiab lawv lub neej kev pab cuam yuav zoo dua qub, ua rau peb yooj yim dua.