Chemistry of inorganic compounds – Silicon or compound thereof – Elemental silicon
Reexamination Certificate
2011-06-07
2011-06-07
Silverman, Stanley (Department: 1736)
Chemistry of inorganic compounds
Silicon or compound thereof
Elemental silicon
C423S349000
Reexamination Certificate
active
07955583
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.
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Ikeda Hiroshi
Tsuzukihashi Kouji
Wakita Saburo
Yanagimachi Atsuo
Leason Ellis LLP.
Mitsubishi Materials Corporation
Mitsubishi Materials Electronic Chemicals Co., Ltd.
Silverman Stanley
Zimmer Anthony J
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