RADIATOR AND ITS PRODUCING PROCESS, SUBSTRATE FOR POWER MODULE, AND POWER MODULE

摘要

PROBLEM TO BE SOLVED: To reduce the weight while enhancing machinability and to attain a sufficient strength while preventing warp. SOLUTION: The radiator 16 is formed by impregnating a low density molding 17 formed of a material having characteristics of low thermal expansion coefficient with a metal high heat conduction material 18. The low thermal expansion material composing the low density molding 17 is an iron-nickel based alloy, e.g. Invar alloy. The high heat conduction material 18 is formed of a material having a high thermal conductivity, e.g. Cu or its alloy, or Al or its alloy. COPYRIGHT: (C)2004,JPO&NCIPI