Patent ID: 6676753
Filing Date: 2004-01-13
Classification: C30B,H01L,Y10S,Y10T

Abstract:
A Czochralski puller for growing monocrystalline silicon ingots, comprising:a chamber enclosure; a crucible in the chamber enclosure that holds molten silicon; a seed holder in the chamber enclosure, adjacent the crucible to hold a seed crystal; a heater in the chamber enclosure, surrounding the crucible; a ring-shaped heat shield housing in the chamber enclosure, including inner and outer heat shield housing walls that are separated from one another, and a heat shield housing top and a heat shield housing bottom which connect the inner and outer heat shield housing walls, the heat shield housing top sloping upwards from the inner heat shield housing wall to the outer heat shield housing wall, and the heat shield housing bottom including a first portion adjacent the inner heat shield housing wall that slopes downwards from the inner heat shield housing wall towards the outer heat shield housing wall and a second portion adjacent the outer heat shield housing wall that slopes downwards from the outer heat shield housing wall towards the inner heat shield housing wall; and a support member that supports the heat shield housing within the crucible.