Kev ntsuas hluav taws xob semiconductor

Kev ntsuas hluav taws xob semiconductor

Txhawm rau kom tau raws li qhov xav tau ntawm ntau yam khoom siv hluav taws xob ntau yam, cov ntsuas hluav taws xob ntawm cov khoom yuav tsum raug ntsuas. Cov kev ntsuas no feem ntau ua rau tiv taus, thauj khoom hauv siab, hom kev coj ua, kev ua kom lub neej, thiab kev thauj khoom hauv lub siab.

Rau lub resistivity ntawm semiconductor cov ntaub ntawv, plaub kis, peb qhov kev soj ntsuam thiab ncua tsis kam feem ntau siv.

Plaub txoj kev sojntsuam yog ib qho uas feem ntau siv, nrog cov qauv yooj yim thiab kev tsim cov ntaub ntawv yooj yim.Qhov ntsuas ntau yam yog 10-3-104meters. Nws tuaj yeem paub qhov sib txawv ntawm cov ntaub ntawv-millimeter-qib. Nws yog qhov tsim nyog rau kev ntsuas lub thev tsis kam ntawm cov khoom siv semiconductor, cov txheej txheem tshwj xeeb, cov ntaub ntawv epitaxial thiab cov khaubncaws sab nraud povtseg diffusion, thiab ion implantation txheej, thiab tuaj yeem muab cov kev ntsuas sai sai, tsis rhuav tshem, ntsuas qhov tseeb.

Thaum plaub txoj kev sojntsuam raug siv los ntsuas qhov tsis kam ntawm epitaxial txheej khoom ntawm tib conductivity yam thiab tsis kam qis substrate, vim tias tam sim no ntws los ntawm cov khoom yuav luv luv nyob rau hauv qis tsis kam tiv thaiv kev tawg, qhov tshwm sim yog tias substrate thiab epitaxial txheej resistivity yog kev cob cog rua hauv parallel Cov txiaj ntsig tag nrho.Rau lub sijhawm no, nws yog qhov yuav tsum tau txais txoj kev sojntsuam peb-txoj kev ntsuas, txuas ncua txoj kev, thiab lwm yam.

Peb txoj kev sojntsuam siv cov thim rov qab-tam sim no-cov yam ntxwv ntawm kev sib tiv tauj ntawm cov hlau sojntsuam thiab cov khoom siv hluav taws xob thiab ntsuas qhov ntsuas hluav taws xob thaum lub sijhawm tawg kom tau txais kev paub txog kev tawm tsam ntawm cov khoom siv.

Cov txheej txheem CV siv lub peev xwm ntawm PN kev sib tshuam los yog kev sib tw Schottky nyob rau hauv thim rov qab kom tau txais cov ntaub ntawv ntawm qhov tsis haum thiab nws cov khoom faib tawm. Hom kev ntsuas no hu ua CV ntsuas cov txheej txheem.Qhov hom kev ntsuas no tuaj yeem muab cov ntaub ntawv ntawm cov khoom ntu sib cais thiab qhov ntev impurity concentration faib tawm, yog li nws muaj qhov zoo dua li plaub-kuaj, peb-kuaj, thiab yog li on.Although lub ncua kuj tseem tuaj yeem ntsuas qhov kev faib tawm ntev, nws yuav tsum ua cov qauv ntawm lub kaum sab xis.Yuav li cas los xij, txoj kev CV tsis tuaj yeem tsuas yog ntsuas kev faib tawm ntawm cov khoom siv epitaxial ntawm tib-hom qis tsis kam, tab sis kuj ntsuas kev faib tawm ntawm cov khoom epitaxial cov txheej txheem tshwj xeeb-puab rau cov txheej txheem ua haujlwm siab-thev tawm.

Kev ntsuas nrog Hauv qhov ntsuas ntawm semiconductor cov ntaub ntawv, Cov nyhuv Hall muaj ntau cov kev siv ntau. Siv nws los kawm cov txheej txheem conduction lossis thauj cov xwm txheej ntawm cov khoom siv hluav taws xob. lub zog (suav nrog kev sib sib zog nqus thiab qib qis impurities), qhov sib txawv ntawm band, kev mus ncig thiab qhov nyiaj tsis muaj zog.