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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.:

US 9022343 B1

PDFFull Text
Expired
Date of Patent:
May. 05, 2015

Filed:

Jul. 27, 2011

Polycrystalline silicon ingot casting mold and method for producing same, and silicon nitride powder for mold release material for polycrystalline silicon ingot casting mold and slurry containing same

Applicants:

Takeshi Yamao, Ube, JP;

Michio Honda, Ube, JP;

Shinsuke Jida, Ube, JP;

Inventors:

Takeshi Yamao, Ube, JP;

Michio Honda, Ube, JP;

Shinsuke Jida, Ube, JP;

Assignee:

Ube Industries, Ltd., Ube-shi, JP;

Attorney:

The Webb Law Firm

Primary Examiner:

Anthony J Green

Int. Cl.
CPC ...
C01B 33/02 (2006.01); B22C 1/00 (2006.01); B22C 3/00 (2006.01); C01B 21/068 (2006.01); B29C 33/54 (2006.01); C30B 11/00 (2006.01); C30B 29/06 (2006.01); B29C 33/58 (2006.01);
U.S. Cl.
CPC ...
B29C 33/54 (2013.01); Y10T 428/2982 (2015.01); C01B 21/068 (2013.01); C01B 33/02 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C30B 11/002 (2013.01); C30B 29/06 (2013.01); B29C 33/58 (2013.01); C01B 21/0687 (2013.01); C01P 2006/22 (2013.01); C01P 2006/80 (2013.01);
Abstract

A polycrystalline silicon ingot casting mold, and method for producing same. Mold release material being obtained by blending a silicon nitride powder (A) having an average particle diameter along the short axis of 0.6 to 13 μm with a silicon nitride powder (B) having an average particle diameter along the short axis of 0.1 to 0.3 μm at a weight ratio of 5:5 to 9:1; coating the mold surface with the slurry; and a heating the mold at 800 to 1200° C. in an atmosphere containing oxygen.

Find Patent Forward Citations

Yamao, Takeshi. (2015). Polycrystalline silicon ingot casting mold and method for producing same, and silicon nitride powder for mold release material for polycrystalline silicon ingot casting mold and slurry containing same (U.S. Patent No. 9022343). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9022343

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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