发明申请
US20150368828A1 METHOD OF MANUFACTURING VITREOUS SILICA CRUCIBLE AND METHOD OF MANUFACTURING SILICON INGOT
有权
制造维生素二氧化硅可溶性的方法和制造硅酮的方法
- 专利标题: METHOD OF MANUFACTURING VITREOUS SILICA CRUCIBLE AND METHOD OF MANUFACTURING SILICON INGOT
- 专利标题(中): 制造维生素二氧化硅可溶性的方法和制造硅酮的方法
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申请号: US14841564申请日: 2015-08-31
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公开(公告)号: US20150368828A1公开(公告)日: 2015-12-24
- 发明人: Toshiaki SUDO , Hiroshi KISHI , Eriko SUZUKI
- 申请人: SUMCO CORPORATION
- 优先权: JP2010145565 20100625
- 主分类号: C30B15/10
- IPC分类号: C30B15/10 ; C30B29/06 ; C03B19/09
摘要:
A method of manufacturing of a vitreous silica crucible includes: fusing silica powder under a reduced pressure of −50 kPa or more and less than −95 kPa to form a transparent vitreous silica layer as an inner layer; fusing silica powder under a reduced pressure of 0 kPa or more and less than −10 kPa to form a bubble-containing vitreous silica layer as an intermediate layer; and fusing silica powder under a reduced pressure of −10 kPa or more and less than −50 kPa to form a semi-transparent vitreous silica layer as an outer layer.
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