Kev Kawm Txog Qhov Teeb Meem: Cov Cheebtsam Graphite Uas Muaj Kev Ntshiab Siab Rau 32-Nti Monocrystalline Thermal Fields Hauv N-Type Silicon Growth

Kev Taw Qhia: Qhov Kev Sib Tw 32-Nti Thermal Field hauv Kev Loj Hlob N-Type Silicon Uas Muaj Kev Ua Haujlwm Zoo

Raws li kev lag luam photovoltaics hloov pauv sai sai los ntawm P-hom PERC mus rau N-hom TOPCon thiab Heterojunction (HJT) lub hnub ci hlwb, qhov kev thov rau cov silicon wafers purity siab dua tau nce siab heev. N-hom silicon substrates xav tau lub neej tsawg tsawg heev (feem ntau >300 μs) thiab ze li ntawm xoom qhov kev ua qias tuaj ntawm cov hlau hloov pauv.

Yuav kom nce qhov throughput, cov chaw tsim khoom silicon wafer tab tom nthuav qhov loj me ntawm crucible mus rau 32 nti thiab dhau ntawd. Txawm li cas los xij, kev ua haujlwm ntawm qhov kub tshaj 1,450 ° C hauv thaj chaw thermal 32-nti ua rau muaj kev cov nyom loj heev hauv kev tsim kho:

1. Kev puas tsuaj ntawm thermal & kev tsis sib xws:Cov cua sov loj heev ua rau cov qauv deformation thiab tawg hauv cov cua sov graphite thiab cov pedestals.
2. Kev Ua Phem Rau Cov Hlau Uas Tsis Huv:Cov khoom tsis huv (Fe, Ni, Cu, V) hauv cov graphite ib txwm muaj yuav ua pa thaum lub sijhawm rub siv lead ua ntev, mus rau hauv cov silicon uas yaj thiab ua rau muaj kev puas tsuaj loj heev rau lub neej ntawm cov neeg nqa khoom.

Kev daws teeb meem engineering: Ultra-Purified Isostatic Graphite & CVD SiC Shielding

Txhawm rau kov yeej cov teeb meem kev siv tshuab no, VeTek Semiconductor tau siv cov khoom siv hloov kho tshiab thoob plaws tag nrho 32-nti thermal field assembly, uas muaj cov high-density isostatic graphite uas raug rau high-temperature halogen purification thiab cov txheej txheem tiv thaiv CVD Silicon Carbide (SiC).

1. Kev Ntxuav Halogen Sib Sib Zog (Cov Tshauv ≤ 2-5 ppm)

Cov graphite kev lag luam txheem muaj cov tshauv ntau ntawm 50 ppm thiab 200 ppm. Thaum kub txog 1,450°C hauv lub tshuab nqus tsev, cov khoom me me no yuav yaj. Peb cov txheej txheem ntxuav roj Halogen kub siab hloov cov khoom tsis huv uas ua los ntawm hlau mus ua cov tshuaj halogen (chlorides/fluorides) uas yaj sai sai ntawm qhov kub siab tshaj 2,400°C.

• Kev Ntsuas Hluav Taws Xob Tawm Hluav Taws Xob (GDMS)xyuas kom meej tias tag nrho cov hlau tsis huv (Fe, Cr, Ni, Cu, V) raug txo kom tsawg dua 0.5 ppm, ua tiav tag nrho cov tshauv ntawm ≤ 2 ppm.
• Qhov Tshwm Sim:Tshem tawm cov pa roj hlau keeb kwm yav dhau los, tiv thaiv cov pas dej silicon molten los ntawm kev ua qias tuaj thaum lub sijhawm rub tawm tas mus li 120+ teev.

2. Cov Qauv Graphite Isostatic High-Density rau Thermal Stability

Cov khoom xws li lub tshuab cua sov graphite, crucible susceptor, thiab lub thoob rwb thaiv tsev yog ua los ntawm cov graphite isostatic uas muaj qhov ceev ceev (1.85 g/cm³), cov noob me me (cov noob me dua 10 μm). Kev nias Isostatic ua kom muaj kev nthuav dav thermal isotropic (CTE), tiv thaiv kev ntxhov siab thermal hauv zos, kev khoov, thiab kev tawg hauv qab cov voj voog thermal rov ua dua.

3. Kev Tiv Thaiv CVD Silicon Carbide (SiC) Txheej

Cov khoom tseem ceeb uas raug rau cov pa roj silicon thiab cov pa roj corrosive purge raug coated nrog 50–80 μm txheej ntawm Chemical Vapor Deposition (CVD) Silicon Carbide (SiC).

• Kev Tiv Thaiv Kev Xeb:Tiv thaiv kev sib xyaw tshuaj ncaj qha ntawm cov pa roj silicon volatile (SiO) thiab cov graphite substrate (SiO + 2C → SiC + CO), tshem tawm kev yaig ntawm qhov chaw thiab cov hmoov av carbon.
• Kev Ntsuas Geometric:Tswj tau qhov geometry ntawm thaj chaw kub kom raug rau 30% lub sijhawm ua haujlwm ntev dua.

Cov Ntaub Ntawv Kev Ua Haujlwm Ntsuas & Kev Pom Zoo ntawm Kev Sim Hauv Tebchaws

Kev sim ua teb sib piv rau 6 lub hlis tau ua thoob plaws 50 lub cub tawg CZ loj 32-nti ntawm lub chaw tsim khoom TOPCon silicon wafer theem 1. Hauv qab no yog qhov ntsuas kev ua tau zoo piv rau cov khoom siv graphite txheem piv rau VeTek Semiconductor cov tshuaj thermal field purified:

Cov Lus Nug Feem Ntau (FAQ)

Xaus Lus & Kev Sab Laj Txog Kev Siv Tshuab

Kev hloov kho mus rau cov khoom siv graphite isostatic uas tau ntxuav kom huv si nrog CVD SiC kev tiv thaiv muab txoj hauv kev ncaj qha, ntsuas tau los daws cov teeb meem ntawm cov zis thiab cov khoom tsis huv hauv 32-nti N-hom monocrystalline silicon loj hlob. Nrog rau kev txhim kho 18% hauv cov zis tseem ceeb thiab lub neej ntev dua 30%, cov chaw tsim khoom siv hnub ci wafer tuaj yeem ua tiav ROI tseem ceeb.