Silicon feedstock for solar cells

Details Silicon feedstock for solar cells Silicon feedstock for solar cells

2011-04-26

2011-04-26

Ward, Jessica L (Department: 1735)

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

C423S349000

Reexamination Certificate

active

07931883

ABSTRACT:
The silicon feedstock for solar cells is made from metallurgical grade silicon by the successive steps of treating the silicon with a calcium-silicate slag, solidifying the treated silicon, leaching the solid silicon with acid, remelting the leached silicon, resolidifying the remelted silicon into an ingot, removing the upper part of the ingot and then crushing and sizing.

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