Patent ID: 6676805
Filing Date: 2004-01-13
Classification: H01L,Y10T

Abstract:
A substrate holding structure for holding a substrate to be processed on a specimen table, and controlling the temperature of said substrate by using a gas between said specimen table and said substrate as a medium, which comprises:a ring-shaped leakage-proof surface having a smooth surface disposed on the surface of said specimen table at a position corresponding to the periphery of said substrate; a plurality of contact holding portions disposed between a position corresponding to the periphery of said substrate and a position corresponding to the center of said substrate; an electrostatic attraction device for attracting said substrate to said specimen table to fix a back surface of said substrate to said ring-shaped leakage-proof surface and said contact holding portions; and a plurality of through holes passing through said contact holding portions and push-up pins for said substrate disposed in the holes, wherein said electrostatic attraction device includes a dielectric substance affixed or formed on an upper surface of said specimen table including said leakage-proof surface and said contact holding portions, and which makes said leakage-proof surface and the surface of said contact holding portion in contact with the back surface of said substrate by electrostatic attraction force, to thereby fix said substrate.