Invention Grant
- Patent Title: Vitreous silica crucible and method of manufacturing the same
- Patent Title (中): 石英玻璃坩埚及其制造方法
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Application No.: US13335885Application Date: 2011-12-22
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Publication No.: US09534318B2Publication Date: 2017-01-03
- Inventor: Toshiaki Sudo , Taira Sato , Shuichi Ikehata , Manabu Shonai , Takuji Nishi , Takaya Satou , Shinsuke Yamazaki
- Applicant: Toshiaki Sudo , Taira Sato , Shuichi Ikehata , Manabu Shonai , Takuji Nishi , Takaya Satou , Shinsuke Yamazaki
- Applicant Address: JP Tokyo
- Assignee: SUMCO CORPORATION
- Current Assignee: SUMCO CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- Priority: JP2010-294593 20101229
- Main IPC: C30B19/02
- IPC: C30B19/02 ; C30B35/00 ; C30B15/00

Abstract:
The present invention provides a method of manufacturing a vitreous silica crucible including: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line.
Public/Granted literature
- US20120167821A1 VITREOUS SILICA CRUCIBLE AND METHOD OF MANUFACTURING THE SAME Public/Granted day:2012-07-05
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