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:
May. 18, 1982
Filed:
Feb. 06, 1981
Applicant:
Inventors:
Franz Kuhn-Kuhnenfeld, Burghausen, DE;
Franz Kohl, Burghausen, DE;
Friedrich Nemetz, Mauerkirchen, AT;
Gerhard Zechmeister, Braunau, AT;
Assignee:
Wacker-Chemitronic Gesellschaft fur Elektronic-Grundstoffe mbH, Burghausen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
1566 / ; 422249 ;
Abstract
In the crucible-pulling of crystalline rods by the Czochralski technique, pulling plants that operate with a radiation screen offer a number of advantages. This process is optimized according to the invention by the use of a radiation screen which is joined to a lifting and pivoting mechanism that can be operated throughout the entire pulling process, and which is brought into position above the melt only when the contents of the crucible have been melted.