Patent ID: 6648967
Filing Date: 2003-11-18
Classification: C30B,Y10S,Y10T

Abstract:
A crystal-pulling apparatus for pulling and growing a monocrystalline silicon ingot comprising a quartz crucible placed in a chamber and containing a silicon melt from which a monocrystalline silicon ingot will be pulled, a graphite crucible container to support the quartz crucible by surrounding the outer circumferential surface and an external base surface of the crucible, and a heater which is provided around the outer circumferential surface of the crucible container to heat the silicon melt, wherein:a spacer having a top surface whose area is smaller than the base area of the quartz crucible and having a melting point higher than that of silicon, is inserted between the base of the quartz crucible and the base of the crucible container while the monocrystalline silicon ingot is pulled.