Chemistry of inorganic compounds – Silicon or compound thereof – Elemental silicon
Reexamination Certificate
2011-01-18
2011-01-18
Brunsman, David M. (Department: 1793)
Chemistry of inorganic compounds
Silicon or compound thereof
Elemental silicon
C423S348000, C423S350000, C264S013000, C264S014000, C075S340000, C075S341000, C428S402000, C428S613000, C117S077000
Reexamination Certificate
active
07871590
ABSTRACT:
A solidified mass for a high-purity multicrystal silicon material that is preferably applicable to producing crystal type silicon ingots for photo voltaics, and a process for producing the solidified mass are provided. The mass of silicon solidified from molten state is a solidified mass produced by dropping molten silicon into a receiving vessel and allowing the vessel to receive the molten silicon, said solidified mass containing bubbles and having (i) an apparent density of not less than 1.5 g/cm3and not more than 2.2 g/cm3and (ii) a compressive strength of not less than 5 MPa and not more than 50 MPa. The process for producing a mass of silicon solidified from molten state includes the steps of dropping molten silicon into a receiving vessel and allowing the vessel to receive the molten silicon, wherein the surface temperature of the vessel for receiving the molten silicon is not lower than 0° C. and not higher than 1000° C., and the receiving vessel is allowed to receive the molten silicon at a rate of 1×10−3to 5×10−1g/sec·cm2.
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Nakashima Junichirou
Sugimura Shigeki
Wakamatsu Satoru
Brunsman David M.
Johnson Kevin M
The Webb Law Firm
Tokuyama Corporation
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