Patent ID: 7763147

Claim:
A plasma processing chamber configured to generate a plasma, the plasma processing chamber including a substrate support assembly including a substrate support that is capable of supporting a substrate, the substrate support assembly, comprising: a plate having a bottom surface and a top surface, the plate being coupled to the plasma processing chamber, the plate including a plurality of countersunk regions for receiving a corresponding plurality of fasteners that enable coupling of the plate to the plasma processing chamber, and the plate including a lip that surrounds an outer region of the plate near the top surface of the plate, and the substrate support is configured to be connected to the top surface of the plate; and an isolation plate that surrounds the outer region of the plate, the isolation plate including a plurality of nipples and each of the plurality of nipples is configured to mate with and be retained within the plurality of countersunk regions in the plate; wherein the isolation plate is configured to fit in the lip of the plate that surrounds the outer region of the plate; wherein the bottom surface of the plate is directly connected to a base of the plasma processing chamber, the fasteners being in contact with the plasma processing chamber.