Patent ID: 7161807

Claim:
A heat spreader module, comprising: a base; a heat spreader member joined on said base, said heat spreader member comprising a composite material including carbon and one of copper and a copper alloy; and an insulating substrate arranged on said heat spreader member, wherein said base, said heat spreader member, and said insulating substrate are joined with a hard solder material having a melting point of not less than 600° C., wherein said base includes a copper alloy which has a proof stress of not less than 45 MPa and a coefficient of thermal conductivity of not less than 270 W/mK when subjected to a heat treatment between 600° and 900° C. for 10 minutes, and wherein the copper alloy of said base is any one of: (a) a copper alloy comprising 0.1 to 1.5 mass % Cr and the balance being Cu; (b) a copper alloy comprising 0.1 to 0.5 mass % Zr and the balance being Cu; (c) a copper alloy comprising 0.05 to 0.3 mass % Zr, 0.3 to 1.2 mass % Cr, and the balance being Cu; (d) a copper alloy comprising 0.01 to 1.5 mass % Ag and the balance being Cu; (e) a copper alloy comprising 1.4 to 3.0 mass % Fe, 0.05 to 0.2 mass % Zn, 0.01 to 0.1 mass % P, and the balance being Cu; and (f) alumina-dispersed copper.