Patent ID: 7150850

Claim:
A method of producing a sintered silicon carbide jig used for producing semiconductors, comprising: (a) sintering either a mixture of a silicon carbide powder and a nonmetal-based sintering aid or a molded body prepared from a mixture of a silicon carbide powder and a nonmetal-based sintering aid, by a hot press method to obtain a first sintered body, (b) subjecting the first sintered body to working-treatment to obtain a second sintered body, (c) subjecting the second sintered body to heat treatment under an argon atmosphere at 2000 to 2400° C., to outward-diffusing impurities in the second sintered body to remove the impurities to obtain a third sintered body, (d) subjecting the third sintered body to surface working treatment to obtain a sintered silicon carbide jig, and (e) washing the sintered silicon carbide jig.