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:
Jul. 23, 2002
Filed:
Jun. 05, 2000
Applicant:
Inventors:
Yoshihiro Akashi, Hyogo, JP;
Yasuhiro Kogure, Hyogo, JP;
Assignee:
Sumitomo Metal Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 1/520 ;
U.S. Cl.
CPC ...
C30B 1/520 ;
Abstract
A method for improving the productivity when a single crystal is pulled while being mechanically held at a knob section formed at an upper end of the crystal. By controlling the crucible rotational speed, a reproducible knob section having a complex shape can be formed in a more time efficient manner than if the knob section were formed by controlling the temperature of the heater.