发明授权
- 专利标题: Vitreous silica crucible with specific ratio of transparent layer and bubble-containing layer thicknesses
- 专利标题(中): 玻璃硅石坩埚具有特定比例的透明层和含气泡层厚度
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申请号: US13308250申请日: 2011-11-30
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公开(公告)号: US09347148B2公开(公告)日: 2016-05-24
- 发明人: Toshiaki Sudo , Ken Kitahara , Koichi Suzuki , Shinsuke Yamazaki
- 申请人: Toshiaki Sudo , Ken Kitahara , Koichi Suzuki , Shinsuke Yamazaki
- 申请人地址: JP Tokyo
- 专利权人: SUMCO CORPORATION
- 当前专利权人: SUMCO CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Law Office of Katsuhiro Arai
- 优先权: JP2010-268841 20101201
- 主分类号: C30B15/10
- IPC分类号: C30B15/10
摘要:
Provided is a vitreous silica crucible, which is resistant to deformation and corrosion even when heated at high temperature for a long time. There is provided a vitreous silica crucible of the present invention including a substantially cylindrical straight body portion, a curved bottom portion, and a corner portion smoothly connecting the straight body portion and the bottom portion, wherein a wall of the vitreous silica crucible includes, from an inner surface side, a transparent layer and a bubble-containing layer, and a ratio of a thickness of the bubble-containing layer with respect to a thickness of the transparent layer at an intermediate position between an upper end and a lower end of the straight body portion is 0.7 to 1.4.
公开/授权文献
- US20120137963A1 VITREOUS SILICA CRUCIBLE 公开/授权日:2012-06-07