Patent ID: 8216418

Claim:
An electrode assembly comprising a thermal control plate, a silicon-based showerhead electrode, and a thermally conductive gasket, wherein: the thermal control plate comprises a frontside, a backside, and a plurality of process gas passages; the silicon-based showerhead electrode comprises a frontside, a backside, and a plurality of showerhead passages; the thermal control plate and the silicon-based showerhead electrode are engaged such that the frontside of the thermal control plate faces the backside of the silicon-based showerhead electrode; the plurality of process gas passages of the thermal control plate and the plurality of showerhead passages of the silicon-based showerhead electrode cooperate to permit passage of a process gas through the electrode assembly; the respective profiles of the frontside of the thermal control plate and the backside of the silicon-based showerhead electrode cooperate to define a thermal interface; the thermally conductive gasket is positioned along the thermal interface between the frontside of the thermal control plate and the backside of the silicon-based showerhead electrode; the thermally conductive gasket is in direct communication with silicon-based material of the silicon-based showerhead electrode; and the thermally conductive gasket comprises a composite of aluminum foil coated with a thermally and electrically conductive rubber.