Qhov sib txawv ntawm polysilicon thiab monocrystalline silicon

Silicon cov khoom yog qhov yooj yim tshaj plaws thiab cov khoom tseem ceeb hauv kev lag luam semiconductor. Lub complex cov txheej txheem ntawm semiconductor Kev Lag Luam Kev Lag Luam Kev Lag Luam Txoj Kev Lag Luam yuav tsum tau pib ntawm kev tsim cov khoom ua haujlwm yooj yim.

Monocrystalline Silicon Hnub Ci Vaj Teeb

Monocrystalline silicon yog ib daim ntawv ntawm cov khoom lag luam silicon. Thaum mlotalal silicon solidifies, Silicon atoms yog teem rau hauv diamond lattice rau ntau cov noob lead no. Yog hais tias cov crystal nuclei loj hlob mus ua nplej nrog tib cov kev taw qhia, cov nplej no yuav ua ke hauv kev ua kom zoo nkauj rau hauv monocrystalline silicon.

Monocrystalline silicon muaj cov khoom siv lub cev ntawm ib tug quasi-hlau thiab muaj hluav taws xob tsis muaj hluav taws xob, uas nce nrog kev nce kub. Nyob rau tib lub sijhawm, monocrystalline silicon kuj muaj qhov tseem ceeb semi-hluav taws xob conductivity. Ultra-dawb huv monocrystalline silicon yog ib tug intrinsic syniconductor. Qhov kev tshaj tawm ntawm ultra-ntshiab monocrystal silicon tuaj yeem txhim kho los ntawm kev ntxiv cov kab (xws li Boron), thiab p-hom Silicon slicioductor tuaj yeem tsim tau. Xws li ntxiv ntawm cov kab ke ⅴA cov ntsiab (xws li phosphorus lossis arsenic) kuj tseem tuaj yeem txhim kho qhov kev ua haujlwm zoo, kev tsim N-hom Silicon slicityonductor.

polysiliconHnub Ci Teeb

Polysilicon yog ib daim ntawv ntawm cov khoom lag luam silicon. Thaum mlotalal silicon solidifies raws li kev mob ntawm supercooling, silicon atoms yog teem rau hauv daim ntawv ntawm lub pob zeb diamond tawv. Yog hais tias cov crystal nuclei loj hlob mus ua nplej nrog cov crystal crystation sib txawv, cov nplej no sib xyaw ua ke thiab crystallize rau hauv polysilicon. Nws sib txawv ntawm monocrystalline silicon, uas yog siv hauv cov khoom siv hluav taws xob thiab cov hlwb ci, thiab los ntawm amorphous silicon, uas yog siv hauv cov khoom siv nyias-zaj duab xis thiabHnub ci Hlwb Vaj Lub Teeb

Qhov sib txawv thiab kev sib txuas ntawm ob

Hauv monocrystalline silicon, lub crystal ncej qauv yog cov khoom siv thiab tuaj yeem txheeb tau los ntawm cov khaub ncaws tsis zoo sab nraud. Hauv monocrystalline silicon, lub crystal lattice ntawm tag nrho cov qauv yog txuas ntxiv thiab tsis muaj cov khoom sib txawv. Loj ib ce muaju yog qhov tsis tshua muaj txiaj ntsig tiag tiag hauv qhov xwm thiab nyuaj ua rau hauv chav kuaj (saib recrystallization). Nyob rau hauv kev sib piv, txoj haujlwm ntawm atoms hauv amorphous qauv tau txwv rau cov kev txiav txim luv luv.

Polycrrystalline thiab subcrystalline theem muaj ntau ntawm cov muaju me me lossis microcrystals. Polysilicon yog ib qho khoom siv ua los ntawm ntau ntau dua li silicon muaju. Cov roj ntsha polycrystalline tuaj yeem paub cov qauv ntawm cov ntawv pom ntawm cov ntawv hlau pom. Cov qib kawm ua ntu zus suav nrog Solar qib polysilicon tau hloov pauv mus rau cov polysilicon nyob rau hauv cov polysilicon nyob rau hauv cov polysilicon tau hloov mus rau hauv cov siv lead ua loj. Monocrystalline silicon yog siv los ua cov khoom sib tsoo feem ntau cov khoom tawg. Polysilicon tuaj yeem ua tiav 99.999% kev ua kom dawb huv. Ultra-ntshiab polysilicon tseem siv nyob rau hauv kev lag luam semiconduct, xws li 2 - rau 3-metre ntev polysilicon pas nrig. Nyob rau hauv microelectronic kev lag luam, polysilicon muaj cov ntawv thov ntawm ob qho macro thiab micro nplai. Cov txheej txheem ntau lawm ntawm monocrystalline silicon suav nrog CZECOLORASSHASS, cheeb tsam melting thiab bridgman txheej txheem.

Qhov sib txawv ntawm polysilicon thiab monocrystalline silicon feem ntau yog manifested hauv cov yam ntxwv lub cev. Hais txog cov khoom siv tshuab thiab hluav taws xob, polysilicon yog qis dua rau monocrystalline silicon. Polysilicon tuaj yeem siv los ua cov khoom siv raw rau teeb liab monocrystalline silicon.

1. Nyob rau hauv anisotropy ntawm cov neeg kho tshuab, kho qhov muag thiab cov khoom siv hluav taws xob, nws yog qhov pom tseeb dua li monocrystalline silicon

2. Hais txog cov hluav taws xob hluav taws xob, hluav taws xob cuam tshuam ntawm polycrystalline silicon yog qhov tsis tshua muaj txiaj ntsig zoo tshaj li ntawm monocrystalline silicon, lossis txawm yuav luag tsis muaj hluav taws xob conduction

3, Raws li cov tshuaj lom neeg ua haujlwm, qhov sib txawv ntawm ob yog me me, feem ntau siv polysilicon ntau dua