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:
Jun. 30, 2009
Filed:
Apr. 10, 2002
Heiko Herold, Neuss, DE;
H. Günter Holdenried, Leichlingen, DE;
Leslaw Mleczko, Bochum, DE;
Matthias Pfaffelhuber, League City, TX (US);
Karl-theodor König, Laufenberg, DE;
Heiko Herold, Neuss, DE;
H. Günter Holdenried, Leichlingen, DE;
Leslaw Mleczko, Bochum, DE;
Matthias Pfaffelhuber, League City, TX (US);
Karl-Theodor König, Laufenberg, DE;
Solarworld Aktiengesellschaft, Bonn, DE;
Abstract
The present invention relates to a method for producing highly pure, granular silicon with a narrow particle-size distribution by decomposing silanes or halosilanes in a fluidised bed and epitaxially growing silicon on silicon seed particles, which method is characterised in that the gas containing silicon is supplied to the reaction chamber in an upward flow and the contents of the fluidised bed are separated in a continuous or discontinuous manner, whereby a particle stream from the fluidised bed is supplied to a separator mounted outside the fluidised bed, particles of the desired size are separated and undersized particles are returned to the fluidised bed. The invention also relates to a device and the use thereof for carrying out said method.