LED Chips Ua li cas?

 

LED chips ncaj qha txiav txim siab qhov ci, kev siv hluav taws xob, thiab kev ua neej nyob ntawm ib qhoLED khoom. Tab sis li cas ib tug me me nti ua tau tiag tiag? Nws cov yam ntxwv tseem ceeb yog dab tsi? Thiab cov kauj ruam tseem ceeb hauv kev tsim khoom puas cuam tshuam rau nws txoj haujlwm? Kab lus no rhuav tshem cov kev tsim khoom ntawm LED chips, lawv cov yam ntxwv tseem ceeb, thiab cov yam ntxwv tseem ceeb uas cuam tshuam rau lawv qhov kev ua tau zoo tag nrho.

 

Core Function thiab Manufacturing Objectives ntawmLED Chips

Cias muab, muaj peb lub hom phiaj tsim khoom tseem ceeb rau LED nti:

• Txhawm rau tsim txhim khu kev qha, qis - tiv thaiv kev tiv thaiv electrodes - qhov tseem ceeb ntawm "interfaces" ntawm nti.
• Txhawm rau txo qhov poob qis ntawm cov electrodes, kom ntseeg tau tias kev ua haujlwm siab dua thiab kev siv hluav taws xob qis dua.
• Txhawm rau khaws cov ntaub ntawv sib txuas rau cov xov hlau sib txuas thaum ua kom lub teeb pom kev zoo tshaj plaws, txij li lub hom phiaj tseem ceeb ntawm cov nti yog emit lub teeb.
• Ntawm cov hom phiaj no, cov txheej txheem hlau deposition rau cov electrodes yog lub hauv paus kauj ruam. Ib txoj hauv kev siv ntau tshaj plaws yog lub tshuab nqus tsev vacuum.

Nyob rau hauv cov txheej txheem no, cov ntaub ntawv hlau yog rhuab - los ntawm cov cua sov los yog hluav taws xob hluav taws xob foob pob hluav taws xob - nyob rau hauv qhov siab - lub tshuab nqus tsev ib puag ncig ntawm kwv yees li 4 Pa. Cov hlau melts thiab transforms mus rau hauv vapor, uas ces uniformly deposits rau saum npoo ntawm cov khoom semiconductor, ua ib tug nyias hlau zaj duab xis.

 

Cov txheej hlau nyias no ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev sib cuag hluav taws xob ruaj khov thiab kev ua haujlwm ntawm tag nrho cov nti.

 

Cov kauj ruam tseem ceeb hauv LED Chip Manufacturing: Los ntawm Hlau Deposition rau Finished Chip

Tom qab cov txheej txheem hlau deposition, LED nti manufacturing txuas ntxiv los ntawm ob peb kauj ruam tseem ceeb xws li photolithography thiab alloying. Qhov nyuaj ntawm cov txheej txheem tuaj yeem sib txawv nyob ntawm cov xim nti -piv txwv li, cov chips liab thiab daj feem ntau tsis yooj yim dua li xiav thiab ntsuab chips.

 

1. Hlau xaiv rau Deposition

Cov electrode sib txawv xav tau cov khoom siv hlau sib txawv.

• P- hom kev sib cuag electrodes feem ntau siv cov alloys xws li AuBe (kub-beryllium) lossis AuZn (kub-zinc).
• N- hom tiv tauj electrodes feem ntau siv AuGeNi (kub-germanium-nickel) alloy.

 

Cov kev xaiv ntawm cov khoom no ua kom muaj hluav taws xob zoo, ruaj khov ohmic sib cuag, thiab ntev - lub sij hawm cia siab ntawm electrodes.

 

2. Txheej txheem Photolithography

Tom qab kev tso tawm, cov txheej txheej alloy tsim rau ntawm qhov chaw yuav tsum mus los ntawm photolithography.

 

Cov kauj ruam no yog qhov tseem ceeb ntawm qhov tseeb "patterning" txheej txheem. Lub hom phiaj yog kom nthuav tawm ntau lub teeb -emitting cheeb tsam li sai tau thaum khaws cov khoom siv hlau tsuas yog qhov uas nws xav tau rau:

 

• Hluav taws xob tiv tauj electrodes
• Cov hlua khi hlua khi

 

Los ntawm kev ua tib zoo txhais cov cheeb tsam no, cov tuam txhab tsim khoom kom ntseeg tau tias cov hlau txheej tsis thaiv cov teeb pom kev zoo thaum tseem tswj xyuas hluav taws xob zoo heev.

3. Cov txheej txheem Alloying

Thaum photolithography tiav, lub nti nkag mus rau txheej txheem alloying.

 

Cov kauj ruam no feem ntau ua nyob rau hauv qhov chaw tiv thaiv ntawm hydrogen (H₂) lossis nitrogen (N₂) txhawm rau tiv thaiv cov hlau oxidation.

 

Tsis muaj universal standard rau alloying kub los yog ntev. Cov kev ntsuas no nyob ntawm ntau yam ntawm:

• Cov yam ntxwv ntawm cov khoom siv semiconductor
• Hom thiab configuration ntawm alloying rauv

 

Kev tswj kom zoo ntawm theem no yog qhov tseem ceeb, vim nws cuam tshuam ncaj qha rau kev tiv thaiv kev tiv thaiv thiab kev ruaj ntseg ntev -.

 

4. Cov txheej txheem ntxiv rau cov chips tshwj xeeb (xiav thiab ntsuab).

Rau xiav thiab ntsuab LED chips, cov txheej txheem electrode ua ntau nyuaj. Yuav tsum muaj cov kauj ruam ntxiv, suav nrog:

• Passivation txheej loj hlob
• Plasma etching

 

Cov txheej txheem no txhim kho hluav taws xob kev ua tau zoo, tiv thaiv cov nti nto, thiab txhim kho tag nrho kev ruaj ntseg thiab kev ntseeg tau.

 

Los ntawm kev xaiv cov khoom mus rau precision patterning thiab tswj alloying, txhua kauj ruam hauv LED nti tsim ncaj qha cuam tshuam qhov ci, kev ua haujlwm, thiab kev ua neej. Txawm tias cov txheej txheem me me tuaj yeem cuam tshuam qhov kev ua tau zoo kawg, uas yog vim li cas LED nti ntau lawm xav tau ob qho tib si cov khoom siv siab heev thiab kev tswj xyuas nruj heev.

Cov txheej txheem twg cuam tshuam rau Optoelectronic Performance ntawmLED Chips?

Ntau tus neeg xav tias chip fabrication tiav txiav txim siab qhov tseem ceeb ntawm LED. Hauv kev muaj tiag, qhov ntawd tsis yog qhov tseeb kiag li.

 

Cov yam ntxwv hluav taws xob tseem ceeb ntawm LED feem ntau txhais tau hais tias thaum lub sij hawm epitaxial loj hlob theem - cov txheej txheem dej ntws ua ntej chip fabrication pib. Chip manufacturing feem ntau tsom rau kev ua kom zoo dua tsis yog qhov hloov pauv ntawm LED cov khoom siv sab hauv.

 

Txawm li cas los xij, kev tuav tsis raug ntawm qee cov txheej txheem tsim khoom tseem tuaj yeem ua rau muaj qhov txawv txav hluav taws xob tsis zoo. Cov yam pheej hmoo tseem ceeb suav nrog:

 

1. Qhov kub tsis zoo ntawm Alloying

Yog tias qhov kub ntawm alloying yog siab dhau los yog qis dhau, nws tuaj yeem ua rau tsis zoo ohmic sib cuag.

 

Qhov no yog thawj qhov ua rau muaj kev nce siab rau pem hauv ntej voltage (VF). Thaum VF nce:

• Kev siv hluav taws xob nce
• Luminous efficiency txo
• Zuag qhia tag nrho chip kev ua haujlwm poob qis

 

Kev tswj qhov kub thiab txias thaum lub sij hawm alloying yog li tseem ceeb rau kev tswj xyuas cov yam ntxwv hluav taws xob ruaj khov.

 

2. Kev kho ntug tom qab dicing

Thaum lub sij hawm nti dicing, lub pob zeb diamond sib tsoo hniav feem ntau yog siv. Tom qab txiav, cov khib nyiab zoo thiab hmoov feem ntau nyob ntawm cov npoo nti.

 

Yog tias cov khoom no ua raws li PN kev sib tshuam - lub teeb tseem ceeb - emitting cheeb tsam ntawm lub nti - lawv tuaj yeem ua rau:

• Rov qab leakage tam sim no
• Hauv qhov xwm txheej hnyav, hluav taws xob tawg

 

Txhawm rau txo qhov kev pheej hmoo no, cov tuam txhab lag luam feem ntau siv cov ntawv tshaj tawm - dicing edge etching kev kho mob, uas ua rau txo qis thiab txhim kho nti kev ntseeg siab.

 

3. Kev tshem tawm tsis tiav Photoresist

Photoresist yog siv thaum lub sij hawm photolithography txheej txheem. Yog tias nws tsis raug tshem tawm tag nrho tom qab ntawd, ntau yam teeb meem yuav tshwm sim:

• Nyob rau sab pem hauv ntej: Nyuaj hauv kev sib txuas ntawm cov xaim, cov ntawv cog lus tsis muaj zog, lossis cov khoom siv cuav tsis tseeb - cuam tshuam rau kev sib txuas hluav taws xob ntawm cov nti thiab cov hluav taws xob sab nraud.
• Nyob rau sab nraub qaum: Nce rau pem hauv ntej voltage (VF), tsis zoo cuam tshuam rau kev ua haujlwm ntawm cov nti.

 

Kev tu kom huv tom qab photolithography yog qhov tseem ceeb kom ntseeg tau tias muaj hluav taws xob ruaj khov thiab kev ntseeg tau ntawm kev ntim khoom.

Yuav ua li cas txhim kho lub teeb tso zis siv

Yog tias lub hom phiaj yog txhawm rau txhim kho luminous siv, muaj cov qauv kev txhim kho yooj yim:

 

• Kev kho deg roughening thaum tsim khoom
• Tsim cov nti hauv ib qho truncated (inverted) pyramid qauv

 

Ob txoj hauv kev txhim kho lub teeb pom kev zoo los ntawm kev tso cai ntau lub teeb pom kev sab hauv kom dim ntawm lub nti nto, yog li ua kom tag nrho cov ci ntsa iab.

 

Txawm hais tias kev loj hlob ntawm epitaxial txiav txim siab qhov kev ua tau zoo ntawm LED, chip fabrication plays lub luag haujlwm txiav txim siab zoo -tuning hluav taws xob stability, kev cia siab, thiab lub teeb extraction efficiency. Ua tib zoo tswj cov txheej txheem alloying, dicing, thiab ntxuav kom ntseeg tau tias cov nti ua tau zoo ntawm nws cov peev txheej tsim.

 

Vim li cas UaLED ChipsLos ntawm qhov sib txawv? Qhov Loj puas cuam tshuam rau kev ua haujlwm?

LED chips muaj nyob rau hauv ntau qhov ntau thiab tsawg, feem ntau nyob ntawm cov kev xav tau ntawm lub zog thiab daim ntawv thov scenarios. Tsis muaj ib tus qauv universal rau nti qhov ntev; qhov tseeb qhov loj yog txiav txim siab loj los ntawm cov chaw tsim khoom muaj peev xwm tsim khoom thiab cov txheej txheem thev naus laus zis.

 

1. Lub Logic Tom Qab Kev Sib Tw Loj

LED nti qhov ntau thiab tsawg yog feem ntau categorized raws li:

 

Raws li qib zog:

• Tsawg- fais fab chips
• Nruab nrab- fais fab chips
• High - lub zog chips

 

Los ntawm kev thov:

• Qhov taw qhia -theem (ib zaug- tuag) chips
• Digital zaub -qib chips
• Dot-matrix zaub chips

 

Chips tsim rau cov teeb pom kev zoo nkauj thiab lwm yam kev siv tshwj xeeb. Hauv qhov tseem ceeb, kev xaiv chip loj yog tsav los ntawm kev xav tau ntawm daim ntawv thov es tsis yog txoj cai kev lag luam ruaj khov.

 

2. Puas yog Chip Size txiav txim siab ua haujlwm?

Ntau tus neeg xav tias "qhov loj dua lub nti, qhov ua tau zoo dua." Qhov no yeej yog ib tug misconception.

Ntev npaum li cov txheej txheem tsim khoom tau tswj tau zoo, nti loj nws tus kheej tsis tsim nyog hloov qhov kev ua tau zoo ntawm optoelectronic ntawm LED.

 

Qhov tseeb:

• Cov chips me tuaj yeem ua rau cov khoom lag luam ntau ntxiv rau wafer
• Cov txiaj ntsig siab dua pab txo cov nqi tsim khoom tag nrho
• Tus nqi efficiency txhim kho yam tsis muaj kev cuam tshuam cov tub ntxhais hluav taws xob ua haujlwm

 

Yog li ntawd, qhov loj me ib leeg tsis yog qhov qhia tau tseeb ntawm qhov zoo lossis qhov ci.

3. Kev sib raug zoo ntawm cov tam sim no thiab cov cua sov dissipation

Kev khiav hauj lwm tam sim no ntawm LED nti yog ze ze rau qhov ceev tam sim no (tam sim no ib cheeb tsam ib cheeb tsam).

• Cov chips me ua haujlwm ntawm qhov tam sim no qis dua.
• Cov chips loj dua ua haujlwm ntawm qhov tam sim no siab dua
• Txawm li cas los xij, lawv qhov ceev tam sim no feem ntau zoo sib xws.

 

Uas tau hais tias, kev tswj xyuas thermal dhau los ua qhov teeb meem tseem ceeb rau cov loj, siab - fais fab chips. Thaum ua haujlwm ntawm cov dej ntws siab:

 

• Thaum tshav kub kub dissipation yuav nyuaj dua.
• Luminous efficiency yuav txo qis me ntsis piv rau cov chips me me ua haujlwm ntawm cov dej qis

 

Ntawm qhov tod tes, cov chips loj dua muaj qee yam hluav taws xob zoo:

• Tsawg bulk kuj
• Txo me ntsis rau pem hauv ntej voltage
• Marginally qis zog poob

 

Yog li thaum cov chips loj tuav lub zog ntau dua, lawv kuj xav tau kev tsim thermal zoo dua los tswj kev ua haujlwm.

 

Xaus

Nrog kev nce qib txuas ntxiv ntawm LED thev naus laus zis, nwsdaim ntawv thovhauv cov teeb pom kev zoo tau nthuav dav sai. Qhov tshwm sim ntawm cov LEDs dawb, tshwj xeeb tshaj yog, tau ua kom cov khoom siv hluav taws xob loj ntawm semiconductor teeb pom kev zoo.

 

Raws li cov txheej txheem tsim khoom thiab cov khoom siv thev naus laus zis txuas ntxiv txhim kho, LED chips tau hloov zuj zus mus rau: Kev ua haujlwm siab dua, qis zog noj, muaj kev ruaj khov thiab kev ntseeg tau ntau dua. Saib ua ntej, LED nti thev naus laus zis yuav txuas ntxiv qhib lub sijhawm tshiab thaum tseem ntsib cov teeb meem tshiab hauv kev lag luam teeb pom kev lag luam thoob ntiaj teb.