Invention Grant
- Patent Title: Vitreous silica crucible
- Patent Title (中): 石英玻璃坩埚
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Application No.: US13166165Application Date: 2011-06-22
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Publication No.: US09243343B2Publication Date: 2016-01-26
- Inventor: Toshiaki Sudo , Hiroshi Kishi
- Applicant: Toshiaki Sudo , Hiroshi Kishi
- Applicant Address: JP Tokyo
- Assignee: SUMCO CORPORATION
- Current Assignee: SUMCO CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- Priority: JP2010-145564 20100625
- Main IPC: C30B15/10
- IPC: C30B15/10 ; C30B29/06 ; C30B35/00

Abstract:
The present invention provides a vitreous silica crucible which can restrain deterioration of crystallinity of a silicon ingot in multi-pulling. Provided is a vitreous silica crucible for pulling a silicon single crystal, the crucible has a wall having, from an inner surface toward an outer surface of the crucible, a synthetic vitreous silica layer, a natural vitreous silica layer, an impurity-containing vitreous silica layer and a natural vitreous silica layer.
Public/Granted literature
- US20110315071A1 VITREOUS SILICA CRUCIBLE Public/Granted day:2011-12-29
Information query
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