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. 12, 2011
Filed:
Sep. 04, 2006
Applicants:
Harald Hertlein, Burghausen, DE;
Rainer Hauswirth, Kirchdorf, DE;
Inventors:
Harald Hertlein, Burghausen, DE;
Rainer Hauswirth, Kirchdorf, DE;
Assignee:
Wacker Chemie AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 33/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fluidized bed process for the production of polycrystalline silicon granules supplies, in addition to reaction gas, a gas containing 99.5 to 95 mol. percent hydrogen and 0.5 to 5 mol. percent gaseous silicon compounds, and the reactor wall is maintained at the same or a higher temperature than the reaction zone, such that the deposition of silicon on reactor internals is minimized.