Recovery method of silicon slurry

Details Recovery method of silicon slurry Recovery method of silicon slurry

2007-12-21

2011-10-11

Mayes, Melvin (Department: 1732)

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

Reexamination Certificate

active

08034313

ABSTRACT:
In slicing a crystal bar into silicon wafers, an average about 40% of silicon would be loss due to the widths of slicing wires themselves. The fact that the silicon slurry is discarded as sludge or discarded after recovering silicon carbide particles causes a large waste of cost. If the silicon slurry (40% of silicon) could be recovered as the raw material for growing silicon crystal bars, the production cost would be lowered. The recovery method of silicon slurry according to the present invention could effectively obtain silicon raw material after removing impurities, which could recover the raw material used in solar crystals, further capable of increasing the silicon crystal production and lowering the cost.

REFERENCES:
patent: 6780665 (2004-08-01), Billiet et al.

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