Patent ID: 9109301
Filing Date: 2015-08-18
Classification: C30B

Abstract:
1. A crystalline silicon formation apparatus, comprising: a crucible, for containing a silicon material; an external crucible, covered onto a body of the crucible; a heater, installed around the crucible; a plurality of quick cooling device, installed at a position of the external crucible at the center of the bottom of the crucible to provide a plurality of cooling points, such that a quick cooling method is applied to the bottom of the crucible through the plurality of quick cooling device to control orientation of a polycrystalline silicon grain, and the crystal grain forms twin boundary; and a temperature preserving device covered around the periphery of the bottom of the crucible, such that the crucible has a higher heat dissipation flux at a position near to the center of the bottom of the crucible than that of lateral sides of the crucible, such that a crystal growing liquid material contained in the crucible is solidified to form solid/liquid interface protruded slightly upward from the middle.