Semiconductor single crystal production device and producing method therefor

A semiconductor single crystal production device including a chamber in which a crucible for melting a raw material of a semiconductor single crystal, a round-cylindrical heater that is provided around the crucible and that heats the raw-material in the crucible and round-cylindrical heat insulating cylinder that is provided outside the round-cylindrical heater so as to surround the periphery of the heater and that insulate a radiant heat are disposed, the semiconductor single crystal production device having a pulling-up mechanism for immersing a seed crystal into the melted raw material and pulling up a single crystal, characterized in that:

• a round-cylindrical heat shield made of an insulating material is provided at the inner circumferential surface of the insulating cylinder,
• a plurality of exhaust pipes respectively composed of round-cylindrical members are intermittently provided between the heater and the heat shield along a peripheral direction of the heater, and
• upper ends of the plurality of exhaust pipes are positioned above the upper end of the heater, and lower ends of plurality of exhaust pipes are respectively positioned to communicate with a plurality of exhaust ports formed in a heat insulating bottom in the chamber.