Kev Taw Qhia Txog Peb Tiam Semiconductor GaN Thiab Lwm Yam Kev Siv Epitaxial

1. Cov khoom siv semiconductor tiam thib peb

Cov thev naus laus zis semiconductor thawj tiam tau tsim los ntawm cov khoom siv semiconductor xws li Si thiab Ge. Nws yog lub hauv paus rau kev txhim kho cov transistors thiab cov thev naus laus zis integrated circuit. Cov ntaub ntawv semiconductor thawj tiam tau tsim lub hauv paus rau kev lag luam hluav taws xob hauv xyoo pua 20th thiab yog cov ntaub ntawv tseem ceeb rau cov thev naus laus zis integrated circuit.

Cov ntaub ntawv semiconductor tiam thib ob feem ntau suav nrog gallium arsenide, indium phosphide, gallium phosphide, indium arsenide, txhuas arsenide thiab lawv cov khoom sib xyaw ua ke. Cov ntaub ntawv semiconductor tiam thib ob yog lub hauv paus ntawm kev lag luam optoelectronic. Ntawm lub hauv paus no, kev lag luam cuam tshuam xws li teeb pom kev zoo, zaub, laser, thiab photovoltaics tau tsim. Lawv tau siv dav hauv kev siv tshuab niaj hnub no thiab kev lag luam optoelectronic zaub.

Cov ntaub ntawv sawv cev ntawm cov ntaub ntawv semiconductor tiam thib peb suav nrog gallium nitride thiab silicon carbide. Vim lawv qhov sib txawv ntawm cov kab dav, qhov ceev ntawm electron saturation drift, thermal conductivity siab, thiab lub zog tawg siab, lawv yog cov ntaub ntawv zoo tagnrho rau kev npaj cov khoom siv hluav taws xob siab, zaus siab, thiab poob qis. Ntawm lawv, cov khoom siv hluav taws xob silicon carbide muaj qhov zoo ntawm lub zog siab, kev siv hluav taws xob tsawg, thiab qhov me me, thiab muaj kev cia siab dav hauv cov tsheb fais fab tshiab, photovoltaics, kev thauj mus los ntawm tsheb ciav hlau, cov ntaub ntawv loj, thiab lwm yam. Gallium nitride RF cov khoom siv muaj qhov zoo ntawm zaus siab, lub zog siab, bandwidth dav, kev siv hluav taws xob tsawg thiab qhov me me, thiab muaj kev cia siab dav hauv kev sib txuas lus 5G, Internet of Things, tub rog radar thiab lwm yam. Tsis tas li ntawd, cov khoom siv hluav taws xob gallium nitride tau siv dav hauv thaj chaw qis-voltage. Tsis tas li ntawd, nyob rau xyoo tas los no, cov ntaub ntawv gallium oxide tshiab xav tias yuav tsim kev sib txuas lus nrog cov thev naus laus zis SiC thiab GaN uas twb muaj lawm, thiab muaj peev xwm thov tau hauv thaj chaw qis-zaus thiab siab-voltage.

Piv nrog rau cov ntaub ntawv semiconductor tiam thib ob, cov ntaub ntawv semiconductor tiam thib peb muaj qhov dav bandgap dav dua (qhov dav bandgap ntawm Si, ib yam khoom siv ntawm cov ntaub ntawv semiconductor tiam thawj zaug, yog li 1.1 eV, qhov dav bandgap ntawm GaAs, ib yam khoom siv ntawm cov ntaub ntawv semiconductor tiam thib ob, yog li 1.42 eV, thiab qhov dav bandgap ntawm GaN, ib yam khoom siv ntawm cov ntaub ntawv semiconductor tiam thib peb, yog siab dua 2.3 eV), muaj zog tiv taus hluav taws xob, muaj zog tiv taus hluav taws xob tawg, thiab kub dua. Cov ntaub ntawv semiconductor tiam thib peb nrog qhov dav bandgap dav dua yog qhov tsim nyog rau kev tsim cov khoom siv hluav taws xob tiv taus hluav taws xob, zaus siab, muaj zog siab thiab muaj kev sib koom ua ke siab. Lawv daim ntawv thov hauv cov khoom siv microwave xov tooj cua zaus, LEDs, lasers, cov khoom siv fais fab thiab lwm yam teb tau nyiam ntau qhov kev saib xyuas, thiab lawv tau pom cov kev cia siab dav hauv kev sib txuas lus txawb, cov phiaj xwm ntse, kev thauj mus los ntawm tsheb ciav hlau, tsheb fais fab tshiab, cov khoom siv hluav taws xob rau cov neeg siv khoom, thiab cov khoom siv ultraviolet thiab xiav-ntsuab [1].