FOERFARANDE OCH ANORDNING FOER ATT TILLVERKA EN KISELKRISTALL.

摘要

The inside of a crucible (1) in which a nolten raw material (4) is placed is partitioned off with a partition ring (11) so that a pulled single crystal (5) is surrounded and the molten raw material may be moved and granular silicon (16) is supplied to the outside of the partition ring, thereby to form the whole surface of outside molten liquid as a granular silicon soluble region so as to maintain the molten liquid surface on the inside of the partition ring at almost a constant level, and also to set the temperature of the molten liquid on the outside of the partition ring higher than the temperature of the inside thereof at least by 10 DEG C or higher by covering the partition ring and the molten liquid surface on the outside thereof with a heat keeping board (20).