Taw qhia rau peb tiam semiconductor GaN thiab lwm yam epitaxial technology

1. Peb tiam semiconductors

Thawj tiam semiconductor technology tau tsim los ntawm cov khoom siv semiconductor xws li Si thiab Ge. Nws yog cov khoom siv hauv paus rau kev txhim kho cov transistors thiab kev siv hluav taws xob sib xyaw ua ke. Thawj cov khoom siv semiconductor tau tsim lub hauv paus rau kev lag luam hluav taws xob hauv xyoo pua 20th thiab yog cov ntaub ntawv yooj yim rau kev siv hluav taws xob sib txuas.

Cov khoom siv semiconductor thib ob feem ntau suav nrog gallium arsenide, indium phosphide, gallium phosphide, indium arsenide, aluminium arsenide thiab lawv cov ternary compounds. Cov khoom siv semiconductor thib ob yog lub hauv paus ntawm kev lag luam xov xwm optoelectronic. Rau lub hauv paus no, muaj feem xyuam rau kev lag luam xws li teeb pom kev zoo, zaub, laser, thiab photovoltaics tau tsim. Lawv tau siv dav hauv cov ntaub ntawv xov xwm niaj hnub thiab optoelectronic zaub kev lag luam.

Cov ntaub ntawv sawv cev ntawm cov khoom siv semiconductor thib peb muaj xws li gallium nitride thiab silicon carbide. Vim lawv qhov sib txawv ntawm qhov sib txawv, siab electron saturation drift velocity, high thermal conductivity, thiab siab tawg teb lub zog, lawv yog cov khoom zoo tagnrho rau kev npaj high-power density, high-frequency, thiab low-loss electronic devices. Ntawm lawv, silicon carbide cov khoom siv hluav taws xob muaj qhov zoo ntawm lub zog loj, kev siv hluav taws xob tsawg, thiab qhov me me, thiab muaj cov ntawv thov dav dav hauv tsheb tshiab, photovoltaics, tsheb thauj mus los, cov ntaub ntawv loj, thiab lwm yam. Gallium nitride RF pab kiag li lawm muaj qhov zoo ntawm cov zaus, siab zog, dav bandwidth, tsawg zog siv thiab me me, thiab muaj dav daim ntawv thov kev cia siab nyob rau hauv 5G kev sib txuas lus, Internet ntawm tej yam, tub rog radar thiab lwm yam teb. Tsis tas li ntawd, cov cuab yeej siv hluav taws xob gallium nitride tau siv dav hauv qhov hluav taws xob tsawg. Tsis tas li ntawd, nyob rau hauv xyoo tas los no, cov khoom siv gallium oxide tshwm sim yuav tsum tsim kom muaj kev sib xyaw ua ke nrog SiC thiab GaN thev naus laus zis uas twb muaj lawm, thiab muaj peev xwm thov kev cia siab nyob rau hauv qhov tsawg-zaus thiab high-voltage teb.

Piv nrog rau cov khoom siv semiconductor thib ob, cov khoom siv semiconductor thib peb muaj qhov dav bandgap dav (qhov bandgap dav ntawm Si, ib yam khoom siv ntawm thawj tiam semiconductor khoom, yog li 1.1eV, bandgap dav ntawm GaAs, ib txwm muaj. Cov khoom siv ntawm cov khoom siv semiconductor thib ob, yog kwv yees li 1.42eV, thiab bandgap dav ntawm GaN, ib yam khoom siv ntawm cov khoom siv semiconductor thib peb, yog siab dua 2.3eV), muaj zog hluav taws xob tiv thaiv, muaj zog tiv thaiv hluav taws xob tawg, thiab kub tsis kam. Cov khoom siv semiconductor thib peb uas muaj qhov dav dav bandgap tshwj xeeb yog tsim rau kev tsim hluav taws xob-resistant, high-frequency, high-power thiab high-integration-density electronic devices. Lawv cov ntawv thov hauv microwave xov tooj cua zaus, LEDs, lasers, cov cuab yeej hluav taws xob thiab lwm yam kev lag luam tau nyiam ntau yam, thiab lawv tau pom cov kev loj hlob dav dav hauv kev sib txuas lus hauv xov tooj, cov phiajcim ntse, tsheb ciav hlau, tsheb tshiab, cov khoom siv hluav taws xob, thiab ultraviolet thiab xiav. -Green light devices [1].