Patent ID: 6785115
Filing Date: 2004-08-31
Classification: C23C,G03F,H01L,Y10T

Abstract:
An electrostatic chuck having an insulation layer including a mount plane on which a wafer is mounted, an inner electrode provided in the insulation layer, and projecting portions protruding from the mount plane which include contact planes that contact said wafer;wherein a backside gas flows in a space defined by said mount plane, said projecting portions, and the wafer such that the wafer is attracted to said mount plane so as to maintain temperature uniformity of the wafer; and wherein a total area of said contact planes of said projecting portions is in a range of 5% to 10% of an area of said inner electrode, and a height of each said projecting portion is in a range of 5 &mgr;m to 10 &mgr;m.