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| Number | Title | Issue Date |
| 7927385 | Processing of fine silicon powder to produce bulk silicon A method for using substantial quantities of silicon powders as charge and processing it to produce a high quality silicon ingots suitable for photovoltaic use is disclosed. In a fused silica crucible, silicon feedstock containing more than about 5% by weight silico... | 04/19/2011 |
| 7540919 | Solidification of crystalline silicon from reusable crucible molds A process for making silicon ingots using a multi-part, reusable, graphite crucible of at least two mold pieces configured for assembly into an open top mold having an interior surface functional as a mold cavity for receiving molten silicon; removing or reducing a ... | 06/02/2009 |
| 7175685 | Dry conversion of high purity ultrafine silicon powder to densified pellet form for silicon melting applications A bulk silicon material for making silicon ingots, consisting of silicon pellets, and a method for making the pellets from an agglomerate-free source of high purity silicon powder by feeding a controlled amount of silicon powder that is free of intentional additives... | 02/13/2007 |
