Patent ID: 8241424
Filing Date: 2012-08-14
Classification: C30B,Y10T

Abstract:
1. A single crystal semiconductor manufacturing apparatus, provided with a chamber having therein a crucible in which material for a single crystal semiconductor is melted and upper and lower heaters which are provided around the crucible and heat the material in the crucible, and a pull-up mechanism which immerses a seed crystal into the melted material and pulls up a single crystal, wherein: each of the upper and lower heaters having an upper level and a lower level disposed about a horizontal center line of each said heater, said heaters being disposed about the crucible; said upper level and said lower level of each said heater being asymmetric about said horizontal center line to each other in each of said upper and lower heaters the upper level of the upper heater having a larger current-carrying area than the lower level of the upper heaters and a smaller electric resistance in the lower level of the upper heaters than the upper level of the upper heaters; and the upper level of the lower heater having less heat generation than the lower level of the lower heater.