The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2015
Filed:
Dec. 13, 2010
Applicants:
Toshiaki Sudo, Akita, JP;
Hiroshi Kishi, Akita, JP;
Makiko Kodama, Akita, JP;
Inventors:
Assignee:
SUMCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 35/00 (2006.01); C03C 19/00 (2006.01); C03C 23/00 (2006.01); C30B 15/10 (2006.01);
U.S. Cl.
CPC ...
C30B 35/002 (2013.01); C03C 19/00 (2013.01); C03C 23/0025 (2013.01); C30B 15/10 (2013.01); Y10T 117/1032 (2015.01);
Abstract
Provided is a vitreous silica crucible which has a special region for suppressing vibration of melt surface during pulling of a silicon single crystal and at the same time, a marking capable of accurately monitoring a changed position of the melt surface when passing through the special region. The special region for preventing sloshing of silicon melt is provided on an inner wall of a straight body portion, and the marking is provided at least at an upper end and a lower end of the special region.