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. 07, 2011
Filed:
Aug. 31, 2007
Kouji Tsuzukihashi, Akita, JP;
Hiroshi Ikeda, Akita, JP;
Atsuo Yanagimachi, Akita, JP;
Saburo Wakita, Noda, JP;
Kouji Tsuzukihashi, Akita, JP;
Hiroshi Ikeda, Akita, JP;
Atsuo Yanagimachi, Akita, JP;
Saburo Wakita, Noda, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Mitsubishi Materials Electronic Chemicals Co., Ltd., Akita, JP;
Abstract
This metallic silicon is manufactured by refining molten crude metallic silicon by unidirectional solidification, and has a purity of 3N or more to 6N or less and an average crystal grain diameter of 1 mm or more. This method for manufacturing the metallic silicon includes: solidifying molten crude metallic silicon in a mold which contains fine silica particles in an inner peripheral layer thereof by unidirectional solidification at a rate of 1 mm/min or less; and then cooling to 200° C. or below at a rate of 2° C./min or less.