Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Cyrus Zahedi0
Ragnar Tronstad0
Kenneth Friestad0
Christian Dethloff0
Erik Enebakk0
Date of Patent
April 26, 2011
Patent Application Number
12108254
Date Filed
April 23, 2008
Patent Primary Examiner
Patent 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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