Dab tsi yog Parameters ntawm Semiconductor?
Dec 29, 2023| Dab tsi yog qhov parameter ntawm semiconductor?
Semiconductors yog cov khoom tseem ceeb hauv cov khoom siv hluav taws xob vim lawv lub peev xwm tshwj xeeb los ua hluav taws xob tam sim no. Cov hluav taws xob conductivity ntawm semiconductors yog tswj los ntawm ntau yam tsis muaj peev xwm yuav manipulated los tsim tej yam outputs. Hauv tsab xov xwm no, peb yuav tshawb txog qhov tsis muaj ntawm cov khoom siv hluav taws xob, lawv cov haujlwm, thiab lawv cuam tshuam li cas ntawm cov khoom siv hluav taws xob.
Ua ntej peb delve rau hauv cov tsis muaj semiconductors, cia peb xub nkag siab tias semiconductors yog dab tsi.
Semiconductors yog cov khoom siv hluav taws xob muaj txiaj ntsig ntawm cov khoom siv hluav taws xob (hlau) thiab cov khoom tsis yog (insulators). Lawv yog cov yam ntxwv ntawm lawv lub peev xwm los ua hluav taws xob tam sim no thaum raug lwm yam, xws li tshav kub, lub teeb, lossis hluav taws xob. Lawv feem ntau yog ua los ntawm silicon, germanium, thiab gallium arsenide.
Parameters ntawm semiconductors
1. Band Gap:
Lub bandgap yog ib qho tseem ceeb parameter hauv semiconductors uas txiav txim siab lawv cov hluav taws xob conductivity. Nws yog lub zog sib txawv ntawm valence band (lub zog siab tshaj plaws nyob rau hauv electrons) thiab conduction band (qis zog qis tshaj uas electrons tuaj yeem ua hluav taws xob) hauv cov khoom. Lub bandgap txiav txim siab lub zog xav tau rau electrons txav los ntawm valence band mus rau lub conduction band, uas cuam tshuam cov hluav taws xob conductivity ntawm cov khoom. Semiconductors nrog lub bandgap loj dua yuav tsum muaj lub zog ntau dua los ua hluav taws xob, hos semiconductors nrog lub bandgap me ua hluav taws xob nrog tsawg zog.
2. Carrier Concentration:
Carrier concentration yog tus naj npawb ntawm cov cab kuj (xws li electrons lossis qhov) muaj nyob rau hauv cov khoom siv semiconductor. Mobility thiab concentration ntawm cov cab kuj muaj feem xyuam rau ob qho tib si hluav taws xob conductivity thiab nqi tis nyob rau hauv ib yam khoom. Feem ntau, cov cab kuj concentration cuam tshuam rau qhov tsis kam ntawm cov khoom thiab nws cov kev ua tau zoo. Semiconductors nrog cov cab kuj siab dua muaj cov conductivity ntau dua, whereas semiconductors nrog qis cov cab kuj concentration muaj qis dua conductivity.
3. Doping:
Doping yog txheej txheem ntawm txhob txwm ntxiv impurities rau cov khoom siv semiconductor los tswj lawv cov hluav taws xob conductivity. Cov txheej txheem suav nrog kev qhia txawv teb chaws atoms rau hauv cov qauv siv lead ua ntawm cov khoom siv hluav taws xob kom nce lossis txo cov nqi thauj khoom. Doping tuaj yeem pab ua kom cov concentration ntawm cov khoom thauj, uas tuaj yeem txhim kho cov hluav taws xob conductivity ntawm semiconductor. Feem ntau siv dopants hauv semiconductors yog boron, phosphorus, arsenic, thiab antimony.
4. Dielectric tsis tu ncua:
Lub dielectric tas li nyob rau hauv semiconductors hais txog cov khoom muaj peev xwm khaws cov nqi hluav taws xob, uas tseem hu ua capacitance. Qhov siab dua qhov dielectric tas li, qhov siab dua qhov capacitance, thiab cov khoom siv hluav taws xob ntau dua tuaj yeem khaws cia. Lub dielectric tas li ntawm ib lub semiconductor yog nyob ntawm nws cov qauv atomic thiab muaj cov impurities lossis dopants.
5. Thermal conductivity:
Lub thermal conductivity yog qhov ntsuas ntawm lub semiconductor lub peev xwm los ua cua sov. Thermal conductivity yog ib qho tseem ceeb heev rau semiconductors vim kev siv hnyav tuaj yeem tsim kom muaj cua sov ntau uas tuaj yeem ua rau cov khoom tsis ua haujlwm lossis ua haujlwm tsis zoo. Yog li ntawd, semiconductors nrog thermal conductivity zoo tiv thaiv cov cuab yeej los ntawm overheating thiab ncua lawv lub txee lub neej. Silicon thiab germanium muaj cov thermal conductivity zoo heev, ua rau lawv zoo tagnrho rau siv hauv cov khoom siv hluav taws xob.
6. Loj thiab Zoo:
Qhov loj thiab cov duab ntawm lub semiconductor ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws cov khoom hluav taws xob. Qhov loj ntawm semiconductor cuam tshuam rau kev txav mus los ntawm cov neeg nqa khoom, thiab cov duab tuaj yeem cuam tshuam li cas tus nqi thauj khoom hauv zos. Cov semiconductors me me muaj qhov siab dua ntawm cov khoom thauj khoom, uas ua rau lawv muaj kev cuam tshuam ntau dua. Tib lub sijhawm, cov duab ntawm cov khoom siv hluav taws xob tuaj yeem txiav txim siab seb cov khoom puas yog p-hom lossis n-hom semiconductor.
Xaus
Semiconductors yog cov khoom tseem ceeb hauv cov khoom siv hluav taws xob, thiab lawv cov kev ua tau zoo yog tswj hwm los ntawm ntau yam tsis xws li bandgap, carrier concentration, doping, dielectric tas li, thermal conductivity, loj, thiab cov duab. Txhua yam ntawm cov kev ntsuas no cuam tshuam cov hluav taws xob conductivity, kev faib tawm, thiab lwm yam khoom ntawm semiconductors hauv txoj kev tshwj xeeb. Los ntawm kev tswj cov kev txwv no, engineers tuaj yeem tsim cov khoom siv semiconductors nrog cov yam ntxwv tshwj xeeb uas ua tiav cov khoom siv tshwj xeeb. Qhov ntau ntawm cov khoom sel ected rau ib lub cuab yeej tshwj xeeb yog txiav txim siab los ntawm daim ntawv thov thiab kev npaj siv lub cuab yeej. Qhov tseem ceeb ntawm cov kev ntsuas no tsis tuaj yeem tsis lees paub vim tias lawv yog ib qho tseem ceeb rau kev ua haujlwm semiconductor.