Patent ID: 7265962

Claim:
An electrostatic chuck comprising: a substrate; a dielectric layer formed by thermal spraying on an upper face of the substrate; an internal electrode embedded in the dielectric layer; a feeder terminal portion extending from a lower face of the substrate to the internal electrode and having a recess; and an electrode provided in the recess of the feeder terminal portion, wherein the feeder terminal portion has members and the electrode and the members of the feeder terminal portion are fixed to each other by brazing, diffusion bonding, or soldering, the dielectric layer has a substrate side recess formed on a surface of the dielectric layer, the surface being located proximate to the feeder terminal portion, the internal electrode has an exposed portion which is exposed to the feeder terminal portion in the substrate side recess, the substrate has a substrate side electrode provided at the exposed portion of the internal electrode in the substrate side recess so as to be apart from the dielectric layer and to project from the substrate side recess to the electrode of the feeder terminal portion, the feeder terminal portion having the electrode and the substrate having the substrate side electrode are removably fixed to each other by mechanical joining, and in the mechanical joining, the substrate side electrode is fit into the recess of the feeder terminal portion and contacts the electrode of the feeder terminal portion.