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:
Jan. 30, 1996
Filed:
Dec. 05, 1994
Applicant:
Inventors:
Wilfried von Ammon, Burghausen, DE;
Erich Dornberger, Burghausen, DE;
Hans Oelkrug, Haiming, DE;
Peter Gerlach, Burghausen, DE;
Franz Segieth, Kirchham, DE;
Assignee:
Wacker-Chemitronic Gesellschaft fuer Eletronik-Grundstoffe mbH, Burghausen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
117 13 ; 117 17 ; 117213 ;
Abstract
A method for pulling a silicon single crystal has the single crystal being pulled at a speed defined as maximum pulling speed in the vertical direction with respect to a silicon melt held in a crucible. The value of the maximum pulling speed is approximately proportional to the axial temperature gradient in the growing single crystal.