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:
Dec. 04, 2007
Filed:
May. 25, 2005
Applicant:
Kenji Okita, Tokyo, JP;
Inventor:
Kenji Okita, Tokyo, JP;
Assignee:
Sumco Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 25/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for pulling single crystal comprises a quartz crucible provided in a chamber for storing raw melt of a single crystal, a heater that heats the raw melt of the single crystal, and a crucible driving unit that rotates the quartz crucible. A quartz crucible deformation prevention unit using an arm or gas blowout is provided in the chamber, whereby deformation of a wall part of the quartz crucible during manufacture thereof can be prevented, and a deformed quartz crucible can be repaired.