Invention Grant
- Patent Title: Vitreous silica crucible
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Application No.: US14901036Application Date: 2013-06-30
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Publication No.: US09932692B2Publication Date: 2018-04-03
- Inventor: Toshiaki Sudo , Tadahiro Sato , Ken Kitahara , Eriko Kitahara
- Applicant: SUMCO CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SUMCO CORPORATION
- Current Assignee: SUMCO CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- International Application: PCT/JP2013/067948 WO 20130630
- International Announcement: WO2015/001593 WO 20150108
- Main IPC: C30B15/10
- IPC: C30B15/10 ; C30B29/06 ; C03B19/09

Abstract:
A vitreous silica crucible includes: a substantially cylindrical straight body portion having an opening on a top end and extending in a vertical direction; a curved bottom portion; and a corner portion connecting the straight body portion with the bottom portion and a curvature of which is greater than that of the bottom portion, wherein an inner surface of the crucible has a concavo-convex structure in which groove-shaped valleys are interposed between ridges, and an average interval of the ridges is 5-100 μm.
Public/Granted literature
- US20160201216A1 VITREOUS SILICA CRUCIBLE Public/Granted day:2016-07-14
Information query
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