LEDs teeb rau peb lub ntiaj teb, thiab hauv plawv ntawm txhua qhov kev ua haujlwm siab LED yog qhovepitaxial wafer-Cov khoom tseem ceeb uas txhais tau tias nws qhov ci, xim, thiab kev ua haujlwm zoo. Los ntawm kev paub txog kev tshawb fawb ntawm kev loj hlob ntawm epitaxial, cov tuam txhab lag luam tau qhib cov peev txheej tshiab rau kev txuag hluav taws xob thiab cov teeb pom kev zoo.
1. Cov txuj ci kev loj hlob ntse dua rau kev ua tau zoo dua
Niaj hnub no tus txheej txheem kev loj hlob ob-kauj ruam, txawm tias ua tau zoo, txwv tsis pub muaj peev xwm. Feem ntau cov reactors lag luam loj hlob tsuas yog rau wafers ib batch. Kev lag luam yog hloov mus rau:
- High-muaj peev xwm reactorsuas lis ntau wafers, txiav nqi thiab boosting throughput.
- Highly automated ib leeg-wafer tshuabrau superior sib xws thiab repeatability.
2. HVPE: Txoj Kev nrawm mus rau cov khoom siv zoo
Hydride Vapor Phase Epitaxy (HVPE) sai sai ua cov txheej GaN tuab nrog tsawg dua, zoo li substrates rau lwm txoj kev loj hlob. Cov yeeb yaj kiab GaN uas muaj kev ywj pheej no tuaj yeem sib tw ntau GaN chips. Tus ntes? Thickness yog ib qho nyuaj rau tswj, thiab cov tshuaj muaj peev xwm degrade cov cuab yeej nyob rau lub sij hawm.
3. Lateral Growth: Smoother Crystals, Lub teeb zoo dua
Los ntawm kev ua tib zoo tsim lub wafer nrog lub qhov ncauj qhov ntswg thiab qhov rais, cov neeg tsim khoom qhia GaN kom loj hlob tsis yog nce toj, tab sis sab nraud. Qhov no "lateral epitaxy" nyob rau hauv qhov khoob uas muaj tsawg dua qhov tsis xws luag, tsim kom muaj cov qauv siv lead ua ntau dua rau kev ua haujlwm siab LEDs.
4. Pendeo-Epitaxy: Cia Crystals ntab
Nov yog qee yam txaus nyiam: engineers loj hlob GaN ntawm cov kab siab thiab tom qab ntawd cia nws "choj" hla qhov chaw khoob. Qhov kev loj hlob ntab no tshem tawm ntau ntawm cov kab mob tshwm sim los ntawm cov ntaub ntawv tsis sib haum, ua rau cov txheej txheem siv lead ua uas muaj zog dua thiab ntshiab dua.
5. Brightening lub UV Spectrum
Cov ntaub ntawv tshiab yog thawb LED lub teeb tob rau hauv UV ntau. Vim li cas qhov no tseem ceeb? UV teeb tuaj yeem qhib cov phosphors siab heev nrog kev ua haujlwm zoo dua li cov kev xaiv ib txwm muaj, qhib lub qhov rooj rau tom ntej-gen dawb LEDs uas yog ob qho tib si ci dua thiab siv zog ntau dua.
6. Multi-Quantum Well Chips: Xim los ntawm hauv
Tsis txhob muab cov LED sib txawv los ua lub teeb dawb, vim li cas ho tsis loj hlob tag nrho hauv ib qho? Multi-quantum well (MQW) chips ua li ntawd los ntawm embedding txheej uas emit txawv wavelengths, sib tov lub teeb ncaj qha nyob rau hauv lub nti. Nws yog qhov ua tau zoo, compact, thiab muaj kuab heev - txawm tias nyuaj los tsim.
7. Recycling Light nrog Photonics
Sumitomo thiab Boston University tau qhia tias stacking cov ntaub ntawv zoo li ZnSe thiab AlInGaP ntawm xiav LEDs tuaj yeem "recycle" photons rau hauv ib qho dawb spectrum. Cov txheej txheem ntse txheej txheej no qhia txog kev sib xyaw ua ke ntawm cov ntaub ntawv tshawb fawb thiab photonics ntawm kev ua haujlwm hauv kev tsim LED niaj hnub.
Yuav ua li cas LED Epitaxial Wafers Ua
Los ntawm substrate mus rau nti, ntawm no yog ib qho yooj yim taug kev:
- Kev loj hlob theem:Substrate → Design → Buffer → N-GaN → MQW → P-GaN → Anneal → Inspection
- Fabrication Phase:Masking → Lithography → Etching → N/P Electrodes → Dicing → Sorting
Cov txheej txheem zoo no ua kom txhua lub nti LED muab kev ua tau zoo uas koj tuaj yeem suav tau - txawm tias teeb pom kev rau koj lub vijtsam lossis koj lub nroog.
Lub sij hawm xa tuaj: Plaub Hlis-08-2025