Patent ID: 7161121

Claim:
An electrostatic chuck for controlling a radial temperature profile across a substrate when exposed to a plasma, comprising: a support member having a bottom surface and a top surface, the top surface of the support member configured to support the substrate; a base plate positioned beneath the support member and in a spaced apart relationship from the support member, the base plate including a plurality of annular grooves, each of the plurality of annular grooves defined by an inner wall, an outer wall, and a bottom surface; and a plurality of thermally insulating annular zone partitions respectively disposed within the plurality of annular grooves of the base plate, each of the plurality of annular zone partitions having a top surface connected in a sealed manner to the bottom surface of the support member, each of the plurality of annular zone partitions having a bottom surface connected in a sealed manner to the bottom surface of the annular groove within which the annular zone partition is disposed, wherein a plurality of independently controllable gas volumes is defined by the spaced apart relationship between the base plate and the support member and the plurality of annular zone partitions connected between the base plate and the support member.