Advanced Silicon Materials LLC

Halvor Kamrud

David W Keck

Edward W Osborne

To avoid problems associated with the formation of unwanted cracks and spalls during the growth of a polycrystalline silicon rod, a flaw is induced in a filament on which silicon will be deposited to produce a rod. The flaw causes the grown rod to have a cleavage plane such that the rod will break in a controlled manner at a desired location. The flaw can be placed at a location selected such that breakage at the cleavage plane will produce long rods and thereby improve the yield of the rod growing process. Such a flaw will also have the effect of minimizing useable rod length losses due to spalling.

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Butte, MT, United States of America

Halvor Kamrud