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:
Mar. 19, 2013
Filed:
Sep. 22, 2008
Applicants:
Harald Hertlein, Burghausen, DE;
Oliver Kraetzschmar, Burgkirchen, DE;
Inventors:
Harald Hertlein, Burghausen, DE;
Oliver Kraetzschmar, Burgkirchen, DE;
Assignee:
Wacker Chemie AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Brittle polysilicon rods having a rod cross-section of 80-99% available for electrical conduction and a flexural strength of 0.1 to 80 N/mmare produced by a process wherein the temperature of the bridge of polysilicon rods in the Siemens process is held at a high temperature and the flow rate of chlorosilanes is increased to the maximum within a short time. The rods are easily fragmented with low force, resulting in polysilicon with a low level of metallic impurities.