GaAs Substrate
Kev piav qhia
Gallium Arsenide (GaAs) yog ib pawg tseem ceeb thiab paub tab III-Ⅴ compound semiconductor, nws tau dav siv hauv kev lag luam optoelectronics thiab microelectronics.GaAs feem ntau muab faib ua ob pawg: semi-insulating GaAs thiab N-hom GaAs.Lub semi-insulating GaAs feem ntau yog siv los ua kev sib txuas nrog MESFET, HEMT thiab HBT cov qauv, uas yog siv hauv radar, microwave thiab millimeter yoj kev sib txuas lus, ultra-high-speed computers thiab optical fiber kev sib txuas lus.N-hom GaAs feem ntau yog siv nyob rau hauv LD, LED, ze infrared lasers, quantum zoo high-power lasers thiab high-efficiency hnub ci hlwb.
Cov khoom
| Crystal | Doped | Hom kev coj ua | Concentration ntawm Flows cm-3 | Qhov siab - cm2 | Txoj Kev Loj Hlob |
| GaAs | Tsis muaj | Si | / | <5 × 105 | LEC |
| Si | N | > 5 × 1017 | |||
| Cr | Si | / | |||
| Fe | N | 2 × 1018 | |||
| Zn | P | > 5 × 1017 |
GaAs Substrate txhais
GaAs substrate yog hais txog lub substrate ua los ntawm gallium arsenide (GaAs) cov khoom siv lead ua.GaAs yog ib tug compound semiconductor muaj li ntawm gallium (Ga) thiab arsenic (As) cov ntsiab lus.
GaAs substrates feem ntau siv hauv kev lag luam hluav taws xob thiab optoelectronics vim lawv cov khoom zoo heev.Qee cov khoom tseem ceeb ntawm GaAs substrates suav nrog:
1. Kev txav hluav taws xob siab: GaAs muaj cov khoom siv hluav taws xob ntau dua li lwm cov khoom siv semiconductor xws li silicon (Si).Cov yam ntxwv no ua rau GaAs substrate haum rau high-frequency high-power electronic khoom.
2. Direct band gap: GaAs muaj qhov sib txawv ntawm qhov ncaj qha, uas txhais tau hais tias lub teeb pom kev zoo tuaj yeem tshwm sim thaum electrons thiab qhov sib txuas.Cov yam ntxwv no ua rau GaAs substrates zoo tagnrho rau kev siv optoelectronic xws li lub teeb emitting diodes (LEDs) thiab lasers.
3. Wide Bandgap: GaAs muaj qhov dav bandgap tshaj silicon, ua rau nws ua haujlwm ntawm qhov kub siab dua.Cov cuab yeej no tso cai rau GaAs-raws li cov cuab yeej ua haujlwm tau zoo dua hauv qhov chaw kub kub.
4. Tsis tshua muaj suab nrov: GaAs substrates pom cov suab nrov qis, ua rau lawv haum rau cov suab nrov qis thiab lwm yam kev siv hluav taws xob rhiab heev.
GaAs substrates tau dav siv hauv cov khoom siv hluav taws xob thiab optoelectronic, suav nrog kev kub ceev transistors, microwave integrated circuits (ICs), photovoltaic cells, photon detectors, thiab solar cells.
Cov substrates no tuaj yeem npaj siv ntau yam txuj ci xws li Hlau Organic Chemical Vapor Deposition (MOCVD), Molecular Beam Epitaxy (MBE) lossis Liquid Phase Epitaxy (LPE).Txoj kev loj hlob tshwj xeeb siv nyob ntawm qhov xav tau daim ntawv thov thiab cov kev xav tau zoo ntawm GaAs substrate.
