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:
Nov. 13, 2001
Filed:
Mar. 29, 2000
Applicant:
Inventor:
Eiichi Iino, Annaka, JP;
Assignee:
Shin-Etsu Handotai Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/326 ;
U.S. Cl.
CPC ...
C01B 3/326 ;
Abstract
There is provided a seed crystal having a strength that the seed crystal is not broken even when the heavy single crystal is produced. The seed crystal is a seed crystal used for producing a single crystal according to Czochralski method wherein a relation between a sectional area of the seed crystal S (mm,) and a weight W (kg) of the single crystal to be pulled is represented by the formula: S>W. The single crystal is produced using the seed crystal. Furthermore, the single crystal is pulled with conforming a sectional area S (mm,) of a seed crystal and a weight W (kg) of a single crystal to be pulled to the formula: S>W.