Patent ID: 9650302
Date: 2017-05-16
CPC Classifications: B28B,B32B,C04B,H01L

Claim:
1. A method for producing an electrostatic chuck obtained by conducting hot-press firing of a stacked calcined body in which a pair of ceramic calcined bodies are stacked so as to sandwich an electrostatic electrode having a predetermined shape or a precursor thereof, the method comprising the steps of: (a) pouring a ceramic slurry containing a ceramic powder, a solvent, a dispersant, and a gelling agent into a first molding die in which the electrostatic electrode or the precursor thereof is removably attached to an inner surface of the first molding die, gelatinizing the ceramic slurry by causing a chemical reaction of the gelling agent, and then removing the first molding die to prepare an embedded-electrode-containing ceramic molded body in which the electrostatic electrode or the precursor thereof is embedded in a first ceramic molded body; (b) preparing a second ceramic molded body; and (c) preparing the stacked calcined body using the embedded-electrode-containing ceramic molded body and the second ceramic molded body, and conducting hot-press firing of the stacked calcined body, wherein, in step (b), the second ceramic molded body is prepared by preparing a molding die for integration, removably attaching a surface of the embedded-electrode-containing ceramic molded body, the surface being opposite to an electrode forming surface, to an inner surface of the molding die for integration, then pouring a ceramic slurry containing a ceramic powder, a solvent, a dispersant, and a gelling agent into the molding die for integration, and gelatinizing the ceramic slurry by causing a chemical reaction of the gelling agent, and in step (c), the stacked calcined body is prepared by taking out, from the molding die for integration, a stacked composite body in which the embedded-electrode-containing ceramic molded body and the second ceramic molded body are stacked, and calcining the stacked composite body; and wherein the first ceramic molded body and the second ceramic molded body are made from the same ceramic slurry.