Patent ID: 8136820

Claim:
An electrostatic chuck with a heater, comprising: a base formed of a sintered body containing alumina; an electrostatic chuck electrode provided in an upper portion side in the base; and a resistance heating body embedded in a lower portion side in the base, wherein the base is composed of a dielectric layer from the electrostatic chuck electrode to an upper surface of the base, and of a support member from the electrostatic chuck electrode to a lower surface of the base, a carbon content in the dielectric layer is 100 wt ppm or less, a carbon content in the support member differs between an electrostatic chuck electrode neighborhood in contact with the dielectric layer and a lower region below the electrostatic chuck electrode neighborhood, the carbon content in the electrostatic chuck electrode neighborhood of the support member is 0.13 wt % or less, the carbon content in the lower region of the support member is 0.03 wt % or more and 0.5 wt % or less, the carbon content in the electrostatic chuck electrode neighborhood is smaller than the carbon content in the lower region, and the resistance heating body contains niobium or platinum.