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:
Apr. 07, 2015
Filed:
May. 03, 2013
Applicant:
Wacker Chemie Ag, Munich, DE;
Inventors:
Martin Weber, Kastl, DE;
Erich Dornberger, Burghausen, DE;
Michael Kerscher, Burgkirchen, DE;
Heinz Kraus, Zeilarn, DE;
Reiner Pech, Neuoetting, DE;
Assignee:
Wacker Chemie AG, Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/18 (2006.01); B32B 9/04 (2006.01); B32B 13/04 (2006.01); C01B 33/02 (2006.01); C23C 16/24 (2006.01); C01B 33/035 (2006.01); C23C 16/44 (2006.01);
U.S. Cl.
CPC ...
C01B 33/02 (2013.01); Y10T 428/12479 (2015.01); C23C 16/24 (2013.01); C01B 33/035 (2013.01); C23C 16/4418 (2013.01);
Abstract
The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.