Patent ID: 6905984
Filing Date: 2005-06-14
Classification: H01L,Y10S

Abstract:
1. A method of clamping and processing a substrate, comprising: placing the substrate on a clamping plate having a plurality of protrusions extending a first distance from a top surface thereof, wherein the plurality of protrusions have a surface roughness of approximately 100 Angstroms or less, and wherein the plurality of protrusions generally contact the substrate, therein defining a protrusion contact area; applying a voltage between a plurality of poles of the clamping plate, wherein an electrostatic force associated with the plurality of poles generally attracts the substrate to the top surface of the clamping plate; and controlling the voltage such that a contact pressure between the substrate and the plurality of protrusions is controlled, therein controlling a thermal transfer between the substrate and the clamping plate.