| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce breakage of a spacer at screwing for pressure welding by using the spacer comprising a silicon nitride sintered compact of high heat dissipation characteristics and strength. <P>SOLUTION: Related to a spacer for pressure welding structure, a ceramics sintered compact contains silicon nitride as a main component. Its heat conductivity is 60 W/mK or more, destructive toughness value is 6.0 MPam<SP>1/2</SP>or more, and thickness is 0.7 mm or less. The ceramics sintered compact has a through hole. In a method for manufacturing the space for pressure welding structure, after the through hole is formed in a ceramics molded body, the space for pressure welding structure is degreased and sintered. The through hole is formed by performing laser processing for the ceramics molded body. <P>COPYRIGHT: (C)2003,JPO |
