HIGHLY HEAT CONDUCTIVE CERAMIC METAL COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a highly heat conductive ceramic metal composite material provided with strength that a porous sintered compact is not ruptured by the pressure at the time of impregnating the material with a molten metal and rigidity capable of sufficiently suppressing the thermal expansion of the whole composite material, and capable of sufficiently securing heat radiating action. SOLUTION: In this composite material for a heat expansion compatible layer to be joined between a ceramic member such as a ceramic substrate for electron device and a metallic member such as a heat sink, a metallic phase composed of a high heat conducting metal having higher heat conductivity than that of the metallic member is distributed isotropically or orientationally in the porous sintered compact obtained by sintering a powdery particle of a high heat conducting ceramic having higher conductivity than that of the ceramic member substantially without providing an interposed phase derived from an inorganic binder or with the interposed phase.