Cov khoom siv semiconductor yog lub hauv paus ntawm cov cuab yeej siv tshuab niaj hnub no, siv dav hauv cov khoos phis tawj, cov khoom siv hluav taws xob, kev sib txuas lus network, tsheb hluav taws xob, thiab lwm yam ntawm cov tub ntxhais, kev lag luam semiconductor feem ntau yog tsim los ntawm plaub yam tseem ceeb: kev sib koom ua ke, cov khoom siv optoelectronic, discrete ntaus ntawv, sensor, uas tso nyiaj rau ntau tshaj 80% ntawm integrated circuits, yog li feem ntau thiab semiconductor thiab integrated circuit sib npaug.
Integrated Circuit Court, raws li cov khoom lag luam feem ntau muab faib ua plaub pawg: microprocessor, nco, logic li, simulator qhov chaw. Txawm li cas los xij, nrog kev nthuav dav ntxiv ntawm daim ntawv thov kev lag luam ntawm cov khoom siv semiconductor, ntau lub sijhawm tshwj xeeb xav tau cov khoom siv semiconductors tuaj yeem ua raws li kev siv cov kub kub, muaj zog hluav taws xob, lub zog siab thiab lwm qhov chaw, tsis txhob ua kom puas, thawj thiab thib ob tiam. Cov ntaub ntawv semiconductor tsis muaj zog, yog li lub cim thib peb ntawm cov khoom siv semiconductor tau los ua.
Tam sim no, qhov dav band gap semiconductor cov ntaub ntawv sawv cev los ntawmsilicon carbide(SiC), gallium nitride (GaN), zinc oxide (ZnO), pob zeb diamond, aluminium nitride (AlN) tuav lub lag luam tseem ceeb nrog cov txiaj ntsig zoo dua, sib sau ua ke hu ua cov khoom siv semiconductor thib peb. Lub cim thib peb ntawm cov khoom siv semiconductor nrog qhov dav dav ntawm qhov sib txawv, qhov siab dua qhov tawg hluav taws xob, thermal conductivity, hluav taws xob saturated tus nqi thiab muaj peev xwm ntau dua los tiv thaiv hluav taws xob, tsim nyog rau kev kub siab, siab zaus, tiv thaiv hluav taws xob thiab hluav taws xob ntau dua. , feem ntau hu ua wide bandgap semiconductor cov ntaub ntawv ( txwv tsis pub band dav yog ntau dua 2.2 eV), kuj hu ua kub kub cov ntaub ntawv semiconductor. Los ntawm kev tshawb fawb tam sim no ntawm cov khoom siv semiconductor thib peb thiab cov khoom siv, cov khoom siv silicon carbide thiab gallium nitride semiconductor yog cov paub tab, thiabsilicon carbide technologyyog qhov loj tshaj plaws, thaum kev tshawb fawb ntawm zinc oxide, pob zeb diamond, aluminium nitride thiab lwm yam ntaub ntawv tseem nyob rau hauv thawj theem.
Cov ntaub ntawv thiab lawv cov khoom:
Silicon carbidecov khoom siv dav siv hauv cov pob bearings ceramic, li qub, cov khoom siv semiconductor, gyros, ntsuas ntsuas, aerospace thiab lwm yam kev lag luam, tau dhau los ua cov khoom siv tsis tau hauv ntau qhov chaw lag luam.
SiC yog ib yam ntawm ntuj superlattice thiab ib homogeneous polytype. Muaj ntau tshaj 200 (tam sim no paub) homotypic polytypic tsev neeg vim qhov sib txawv ntawm cov khoom sib txawv ntawm Si thiab C diatomic txheej, uas ua rau cov qauv siv lead ua sib txawv. Yog li, SiC yog qhov tsim nyog rau lub cim tshiab ntawm lub teeb emitting diode (LED) substrate khoom, cov khoom siv hluav taws xob muaj zog.
| yam ntxwv | |
| khoom ntiag tug | High hardness (3000kg / hli), tuaj yeem txiav ruby |
| Siab hnav tsis kam, thib ob tsuas yog pob zeb diamond | |
| Lub thermal conductivity yog 3 zaug siab dua li ntawm Si thiab 8 ~ 10 npaug siab dua li ntawm GaAs. | |
| Lub thermal stability ntawm SiC yog siab thiab nws yog tsis yooj yim sua kom yaj ntawm atmospheric siab | |
| Kev ua tau zoo thaum tshav kub kub dissipation yog qhov tseem ceeb heev rau cov khoom siv hluav taws xob siab | |
|
chemical khoom | Muaj zog corrosion kuj, resistant rau yuav luag txhua tus paub corrosive tus neeg sawv cev ntawm chav tsev kub |
| SiC nto yooj yim oxidizes rau SiO, nyias txheej, tuaj yeem tiv thaiv nws ntxiv oxidation, hauv Tshaj 1700 ℃, oxide zaj duab xis melts thiab oxidizes sai | |
| Bandgap ntawm 4H-SIC thiab 6H-SIC yog li 3 npaug ntawm Si thiab 2 npaug ntawm GaAs: Kev sib tsoo hluav taws xob siv hluav taws xob yog qhov kev txiav txim siab siab dua Si, thiab cov hluav taws xob nrawm nrawm yog saturated Ob thiab ib nrab sij hawm Si. Lub bandgap ntawm 4H-SIC yog dav dua li ntawm 6H-SIC |
Post lub sij hawm: Aug-01-2022