本公司手中現在美國原廠MEMC每月10T 化學法提取的高純度7N極原生多晶矽，歡迎大陸太陽能廠家合作使用。另用加拿大BSI公司CP法（化學加物理法）提取的6N級多晶矽，價格較化學法便宜，能直接拉單晶棒，成品合格率較高，國內有現貨供應。 chemical 7NMEMC Virgin Poly Chunks -High purity and High resistivity
Description:ParameterPXO3NWProduct packaging requirements5kg bag – 30 kg box360 kg palletmaterial packaged in single bagSize1-650 gramsResistivity N type≥ 300 ohm*cmResistivity P type≥ 3000 ohm*cmDonors content (P, As, Sb)P: <= 0.3 ppbaAs: <= 0.1 ppbaAcceptors content (B, Al)B: <= 0.1 ppbaCarbon<= 200 ppba  Bulk metals (Fe, Cu, Ni, Cr, Zn, Na): Na<= 1 ppbaCr<= 0.1 ppba