METHOD AND APPARATUS FOR PRODUCING CRYSTALLINE SILICON

摘要

PROBLEM TO BE SOLVED: To produce crystalline silicon having large crystal grain sizes. SOLUTION: In a method for producing crystalline silicon in which silicon molten liquid 10 in an ingot mold 1 is cooled from the bottom part 1a of the ingot mold 1 and gradually solidified toward the upper direction, the silicon molten liquid 10 at the bottom part is first solidified by cooling the bottom part 1a of the ingot mold 1 in the state that a positive temp. gradient is imparted in the horizontal direction. Then the molten liquid is gradually solidified toward the upper direction.