Patent ID: 6281144
Filing Date: 2001-08-28
Classification: C23C,Y10T

Abstract:
A method of backside and edge exclusion of polymer film on a wafer during CVD, comprising the steps of:securing said wafer to a wafer clamp, said wafer clamp comprising a peripheral raised region and a plurality of raised seals, wherein outer edges of said plurality of raised seals and an inner edge of said peripheral raised region form a first channel therebetween, and wherein adjacent raised seals form grooves therebetween said wafer clamp further comprising a raised central region co-planar with said plurality of raised seals, wherein an outer edge of said central region and inner edges of said plurality of raised seals form a second channel therebetween, and wherein a plurality of gas supply grooves extend through said raised central region from a central area of said wafer clamp to said second channel; andinjecting a gas through said gas supply grooves in said wafer clamp, wherein said gas flows outward from said central area, into said second channel, through said grooves and into said first channel, thereby to prevent monomer molecule deposition on the backside of said wafer.