Dab tsi yog ibLED nti? Yog li dab tsi yog nws cov yam ntxwv?LED chip manufacturingNws yog tsim los tsim cov khoom siv hluav taws xob zoo thiab txhim khu kev qha uas tsis tshua muaj ohm tiv tauj electrode, ua tau raws li qhov me me voltage poob ntawm cov ntaub ntawv contactable, muab lub siab ncoo rau vuam hlau, thiab tib lub sijhawm, lub teeb ntau li ntau tau. Txoj kev hloov zaj duab xis feem ntau siv lub tshuab nqus tsev evaporation. Nyob rau hauv 4Pa lub tshuab nqus tsev siab, cov ntaub ntawv yog yaj los ntawm cov cua sov los yog cov hluav taws xob hluav taws xob tawg hluav taws xob cua sov, thiab BZX79C18 tau hloov mus rau hauv cov hlau vapor mus tso rau saum npoo ntawm cov ntaub ntawv semiconductor nyob rau hauv qis qis.

Feem ntau siv P-hom kev sib cuag hlau xws li AuBe, AuZn thiab lwm yam alloys, thiab cov hlau tiv tauj ntawm N-sab feem ntau yog AuGeNi alloys. Cov txheej txheej hlau tsim tom qab txheej kuj yuav tsum tau nthuav tawm thaj tsam luminous kom ntau li ntau tau los ntawm photolithography, kom cov txheej txheej seem ntawm cov hlau tuaj yeem ua tau raws li qhov yuav tsum tau ua kom zoo thiab txhim khu kev qha qis ohm hu rau electrode thiab vuam kab ncoo. Tom qab cov txheej txheem photolithography tiav, cov txheej txheem alloying yuav tsum tau ua raws li kev tiv thaiv H2 lossis N2. Lub sij hawm thiab qhov kub thiab txias ntawm alloying feem ntau yog txiav txim siab raws li cov yam ntxwv ntawm cov khoom siv semiconductor thiab daim ntawv ntawm alloy rauv. Yog lawm, yog tias cov txheej txheem nti electrode xws li xiav-ntsuab yog qhov nyuaj dua, qhov kev loj hlob ntawm zaj duab xis passive thiab plasma etching txheej txheem yuav tsum tau ntxiv.

Hauv cov txheej txheem LED nti tsim, cov txheej txheem twg muaj qhov cuam tshuam tseem ceeb rau nws txoj kev ua haujlwm photoelectric?

Feem ntau hais lus, tom qab ua tiav ntawm LED epitaxial ntau lawm, nws cov hluav taws xob tseem ceeb tau ua tiav. Kev tsim cov chips yuav tsis hloov nws qhov tseem ceeb ntawm kev tsim khoom, tab sis cov xwm txheej tsis zoo hauv cov txheej txheem txheej thiab cov txheej txheem alloying yuav ua rau qee qhov hluav taws xob tsis zoo. 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 siab rau pem hauv ntej voltage nco VF nyob rau hauv nti manufacturing. Tom qab txiav, yog tias qee qhov txheej txheem etching tau ua tiav ntawm lub nti ntug, 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, yuav muaj ntau cov khib nyiab pov tseg ntawm lub nti ntug. Yog tias cov khoom no lo rau PN kev sib tshuam ntawm LED nti, lawv yuav ua rau hluav taws xob, lossis txawm tias tawg. Tsis tas li ntawd, yog hais tias lub photoresist ntawm lub nti nto tsis tev tawm kom huv si, nws yuav ua rau muaj teeb meem nyob rau hauv pem hauv ntej hlau bonding thiab cuav soldering. Yog tias nws yog sab nraub qaum, nws tseem yuav ua rau lub siab poob siab. Nyob rau hauv cov txheej txheem ntawm cov chips ntau lawm, lub teeb siv tau tuaj yeem txhim kho los ntawm txoj kev ntawm qhov chaw roughening thiab txiav rau hauv inverted trapezoid qauv.

Vim li cas LED chips muab faib ua ntau qhov sib txawv? Dab tsi yog qhov cuam tshuam ntawm qhov loj me rauLED photoelectrickev ua tau zoo?

LED nti loj tuaj yeem muab faib ua lub zog me me, nruab nrab lub zog nti thiab siab zog 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 lattice thiab cov teeb pom kev zoo nkauj thiab lwm yam. Qhov tshwj xeeb loj ntawm cov nti yog nyob ntawm qhov tseeb qib ntawm cov chaw tsim khoom sib txawv, thiab tsis muaj qhov tshwj xeeb yuav tsum tau ua. Ntev npaum li cov txheej txheem tsim nyog, 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. Qhov tam sim no siv los ntawm cov nti yog qhov muaj feem xyuam nrog qhov ceev tam sim no ntws los ntawm cov nti. Tam sim no siv los ntawm cov nti yog me me thiab tam sim no siv los ntawm cov nti yog loj. Lawv chav tsev tam sim no ceev yog qhov qub. Xav 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, qhov ntim tsis kam ntawm cov nti yuav txo qis, yog li qhov hluav taws xob txuas mus tom ntej yuav txo qis.

Lub nti loj npaum li cas LED lub zog siab nti feem ntau xa mus rau? Vim li cas?

LED high-power chips siv rau lub teeb dawb feem ntau tuaj yeem pom nyob rau hauv kev ua lag luam ntawm li 40 mils, thiab lub npe hu ua high-power chips feem ntau txhais tau tias cov hluav taws xob 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 chips yog ib qho tseem ceeb heev, yuav tsum tau ib tug loj nti cheeb tsam.

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 nrog GaP, GaAs thiab InGaAlP? Vim li cas?

Lub substrates ntawm LED liab thiab daj chips thiab ci quaternary liab thiab daj chips yog ua los ntawm GaP, GaAs thiab lwm yam compound semiconductor cov ntaub ntawv, uas feem ntau yuav ua tau rau hauv N-hom substrates. Cov txheej txheem ntub dej yog siv rau photolithography, thiab tom qab ntawd lub pob zeb diamond log hniav yog siv rau kev txiav rau hauv chips. Lub xiav-ntsuab nti ntawm GaN cov khoom yog sapphire substrate. Vim tias sapphire substrate yog insulated, nws tsis tuaj yeem siv los ua tus ncej ntawm LED. P / N electrodes yuav tsum tau ua nyob rau hauv lub epitaxial nto ib txhij los ntawm ib tug qhuav etching txheej txheem thiab kuj los ntawm ib co passivation txheej txheem. Vim tias sapphires nyuaj heev, nws nyuaj rau txiav cov chips nrog pob zeb diamond sib tsoo log hniav. Nws cov txheej txheem feem ntau nyuaj dua li ntawm GaP thiab GaAs LEDs.

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

Lub thiaj li hu ua pob tshab electrode yuav tsum muaj peev xwm ua hluav taws xob thiab lub teeb. 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 (ITO), tab sis nws tsis tuaj yeem siv los ua lub vuam ncoo. Thaum lub sij hawm fabrication, lub ohmic electrode yuav tsum tau ua nyob rau hauv lub nti nto, thiab ces ib txheej ntawm ITO yuav tsum tau coated rau saum npoo, thiab ces ib txheej ntawm vuam ncoo yuav tsum tau coated rau ntawm lub 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 sijhawm, txij li ITO refractive index yog nruab nrab ntawm huab cua thiab qhov ntsuas qhov ntsuas ntawm cov khoom siv epitaxial, lub teeb lub kaum sab xis tuaj yeem nce ntxiv, thiab cov 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 cov kev siv 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, uas tau los ua lub hom phiaj ntawm semiconductor teeb pom kev zoo. Txawm li cas los xij, cov nti tseem ceeb thiab ntim tshuab tseem yuav tsum tau txhim kho, thiab cov nti yuav tsum tau tsim los ntawm lub zog siab, siab luminous efficiency thiab qis thermal kuj. Kev nce lub zog txhais tau tias nce qhov tam sim no siv los ntawm cov nti. Txoj kev ncaj tshaj yog ua kom lub nti loj. Niaj hnub no, cov chips siab zog yog tag nrho 1mm × 1mm, thiab tam sim no yog 350mA Vim tias qhov nce ntawm kev siv tam sim no, qhov teeb meem ntawm cov cua kub dissipation tau dhau los ua qhov teeb meem tseem ceeb. Tam sim no qhov teeb meem no tau pib daws los ntawm chip flip. Nrog rau kev txhim kho ntawm LED thev naus laus zis, nws daim ntawv thov hauv thaj chaw teeb pom kev zoo yuav ntsib txoj hauv kev thiab kev sib tw uas tsis tau muaj dua.

Flip Chip yog dab tsi? Nws cov qauv yog dab tsi? Nws qhov zoo yog dab tsi?

Blue LED feem ntau siv Al2O3 substrate. Al2O3 substrate muaj siab hardness, tsawg thermal conductivity thiab conductivity. Yog tias cov qauv siv tau zoo, ntawm ib sab, nws yuav ua rau muaj teeb meem tiv thaiv zoo li qub, ntawm qhov tod tes, cov cua sov dissipation kuj yuav dhau los ua teeb meem loj hauv cov xwm txheej tam sim no. Nyob rau tib lub sijhawm, vim tias cov electrode pem hauv ntej yog tig mus, ib feem ntawm 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 li cov khoom ntim khoom siv los ntawm kev siv tshuab chip flip chip.

Tam sim no lub ntsiab flip qauv mus kom ze yog: ua ntej, npaj ib tug loj loj xiav LED nti nrog ib tug haum eutectic vuam electrode, nyob rau tib lub sij hawm, npaj ib tug silicon substrate me ntsis loj dua lub xiav LED nti, thiab tsim ib tug kub conductive txheej thiab txhuas hlau. txheej (ultrasonic kub hlau pob solder sib koom) rau eutectic vuam. Tom qab ntawd, lub high-power xiav LED nti thiab silicon substrate yog welded ua ke siv eutectic vuam khoom.

Cov qauv no yog tus cwj pwm los ntawm cov txheej txheem epitaxial ncaj qha sib cuag 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. Txij li thaum lub substrate ntawm sapphire yog tig los tom qab inversion, nws dhau los ua lub teeb emitting nto. Lub 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, LED teeb nyob rau yav tom ntej yuav ua tau zoo dua, thiab lawv lub neej kev pabcuam yuav zoo dua qub, ua rau peb yooj yim dua.