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. 26, 1995
Filed:
Feb. 28, 1994
Applicant:
Inventors:
Hans Oelkrug, Haiming, DE;
Franz Segieth, Kirchham, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
117 20 ; 117920 ;
Abstract
A process and an apparatus reduces the oxygen incorporation into a single crystal of silicon which is drawn by the Czochralski method. If a molding is immersed at least temporarily in the melt between the single crystal and the crucible wall during drawing of the single crystal, the oxygen content of the single crystal is reduced compared with the oxygen content of a single crystal which has been drawn without the use of the molding.