Patent ID: 7226561
Filing Date: 2007-06-05
Classification: C04B,H01L

Abstract:
1. A method of producing a silicon carbide sintered body jig using a reaction sintering method, comprising: (a) dispersing a silicon carbide powder and a phenol resin in a solvent, to produce a mixed powder in the form of slurry, (b) pouring the resulted mixed powder into a mold and drying this to obtain a green body, (c) temporarily-sintering the resulted green body under a vacuum atmosphere or inert gas atmosphere at 1500° C. to 2000° C., to obtain a temporarily-sintered body, (d) temporarily-molding said temporarily-sintered body, to obtain a temporarily-molded body, (d-2) impregnating the resulted temporarily-molded body of step (d) with a phenol resin as a carbon source and temporarily-sintering the resulted carbon source impregnated temporarily molded body under a vacuum atmosphere or inert gas atmosphere at 600 to 2000° C., (e) impregnating a melted metal silicon into the impregnated temporarily-molded body of step (d-2) by a capillary phenomenon and reacting free carbon in said temporarily-molded body with silicon sucked into said temporarily-molded body by a capillary phenomenon, to obtain a silicon carbide sintered body, and (f) subjecting the resulted silicon carbide sintered body to precise processing, to obtain a silicon carbide sintered body jig.