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:
Jul. 07, 2015
Filed:
Dec. 11, 2012
Applicant:
Wacker Chemie Ag, Munich, DE;
Inventors:
Assignee:
Wacker Chemie AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/02 (2006.01); C01B 33/021 (2006.01); C01B 33/035 (2006.01); C01B 33/037 (2006.01);
U.S. Cl.
CPC ...
C01B 33/02 (2013.01); C01B 33/021 (2013.01); C01B 33/035 (2013.01); C01B 33/037 (2013.01);
Abstract
The invention provides a polycrystalline silicon chunk having a concentration of 1-50 ppta of boron and 1-50 ppta of phosphorus at the surface.