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:
Aug. 17, 2010
Filed:
Nov. 13, 2004
Markus Pridoehl, Grosskrotzenburg, DE;
Paul Roth, Kempen, DE;
Hartmut Wiggers, Reken, DE;
Frank-martin Petrat, Muenster, DE;
Michael Kraemer, Schoeneck-Kilianstaedten, DE;
Markus Pridoehl, Grosskrotzenburg, DE;
Paul Roth, Kempen, DE;
Hartmut Wiggers, Reken, DE;
Frank-Martin Petrat, Muenster, DE;
Michael Kraemer, Schoeneck-Kilianstaedten, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
Aggregated crystalline silicon powder with a BET surface area of 20 to 150 m/g. It is prepared by subjecting at least one vaporous or gaseous silane and optionally at least one vaporous or gaseous doping material, an inert gas and hydrogen to heat in a hot wall reactor, cooling the reaction mixture or allowing the reaction mixture to cool and separating the product from gaseous substances in the form of a powder, wherein the proportion of silane is between 0.1 and 90 wt. %, with respect to the sum of silane, doping material, hydrogen and inert gases, and wherein the proportion of hydrogen, with respect to the sum of hydrogen, silane, inert gas and doping material, is in the range 1 mol. % to 96 mol. %. It can be used to produce electronic components.