Patent ID: 8498093

Claim:
An electrostatic chuck comprising an electrostatic electrode embedded in a MgO ceramic base having a wafer-supporting surface that is parallel to the electrostatic electrode, wherein the electrostatic electrode is composed of any one conductive material selected from the group consisting of the following (1) to (6): (1) a conductive material produced by firing at least one metal selected from the group consisting of Ni, Co, and Fe, (2) a conductive material produced by firing a mixture of at least one metal powder selected from the group consisting of Ni, Co, and Fe powders and at least one carbide powder selected from the group consisting of TiC, TaC, and NbC powders, (3) a conductive material produced by firing a mixture of a MgO powder and at least one metal powder selected from the group consisting of Ni, Co, and Fe powders, (4) a conductive material produced by firing a mixture of a MgO powder, at least one metal powder selected from the group consisting of Ni, Co, and Fe powders, and at least one carbide powder selected from the group consisting of TiC, TaC, and NbC powders, (5) a conductive material produced by firing a mixture of a MgO powder and a Cr 3 C 2 powder, or (6) a conductive material produced by firing a mixture of a MgO powder and at least one carbide powder selected from the group consisting of WC, TiC, TaC, and NbC powders.