Patent ID: 7306676
Filing Date: 2007-12-11
Classification: C30B,Y10T

Abstract:
1. An apparatus for manufacturing a semiconductor single crystal, the apparatus comprising: a crucible for holding a semiconductor melt; a heater for heating the crucible; a crucible driving unit for rotating and/or vertically moving the crucible; a chamber for housing the crucible and the heater; and a hydrogen mixed gas supplying device for supplying into the chamber a hydrogen mixed gas including an inert gas in admixture with a hydrogen-containing gas that contains hydrogen atoms, wherein the hydrogen mixed gas supplying device comprises: a hydrogen-containing gas supply unit for supplying the hydrogen-containing gas that contains hydrogen atoms; an inert gas supply unit for supplying the inert gas; a hydrogen-containing gas flow rate controller for controlling a flow rate of the hydrogen-containing gas supplied by the hydrogen-containing gas supply unit; an inert gas flow rate controller for controlling a flow rate of the inert gas supplied by the inert gas supply unit; and a buffer tank for mixing together the hydrogen-containing gas and the inert gas that flow respectively from the hydrogen-containing gas flow rate controller and the inert gas flow rate controller so as to form a hydrogen mixed gas and for holding the hydrogen mixed gas.