Patent ID: 7576018
Filing Date: 2009-08-18
Classification: H01L,Y10S

Abstract:
1. A method of locally deforming a substrate, comprising: supporting a substrate on a substrate support in a vacuum chamber for processing; providing backside gas through inlet ports of each of a plurality of groups of ports, each group lying in a different one of a respective plurality of areas across the substrate support, to a space between the substrate support and the substrate, each of said areas of the substrate support having at least one backside gas inlet port connected to a supply of backside gas and at least one outlet port connected to a vacuum exhaust system; separately controlling the pressure of the backside gas at different ones of the areas of the plurality to control separately the local pressure on the backside of the substrate overlying different ones of said areas on the substrate support, by separately dynamically controlling at least one valve affecting gas how to at least one of said areas while separately dynamically controlling at least one other valve affecting gas flow from the remaining plurality of ports of each of said areas surrounding said port to which gas is introduced.