Patent ID: 7576967

Claim:
An electrostatic chuck comprising: a ceramic base having an electrode embedded approximately in parallel with and in vicinity to a holding face for holding a substrate; a temperature control member in contact with a back face of the ceramic base; a terminal inserted through an introduction hole formed in the back face, which is a reverse side of the holding face of the ceramic base, wherein the terminal extends perpendicular to the back face throughout the temperature control member, and is connected to the electrode; and an insulating member made of high thermal conductivity ceramics, and having a thermal conductivity of not smaller than 100 W/m·K, wherein the insulating member is provided around the terminal and insulates the temperature control member from the terminal, wherein the insulating member has a flange portion on an end portion in contact with the ceramic base, the insulating member extending a radial distance beyond the terminal such that it is radially larger in the flange portion than in a remaining portion of the insulating member extending through the temperature control member; wherein a distance between the top surface of terminal and the holding face is shorter than a thickness of the temperature control member; the temperature control member is made of metal; a diameter of the flange portion is longer than the thickness of the ceramic base; and a thickness of the flange portion is not smaller than 0.5 mm and not larger than 2 mm.