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:
Sep. 23, 1986
Filed:
Jun. 07, 1984
Applicant:
Inventors:
Masayoshi Tatsumi, Osaka, JP;
Toshihiro Kotani, Osaka, JP;
Assignee:
Sumitomo Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
422310 ; 422249 ; 1566 / ; 156D / ;
Abstract
A single-crystal boule pulling rod for pulling a boule from a melt utilizing the Czochralski method including a main pulling rod and a heat insulating layer surrounding the main pulling rod. The main pulling rod, which may be either bar-shaped or composed of two concentric pipes, is forcibly cooled. Preferably, a pipe made of molybdenum or stainless steel is provided around the heat insulating material.