Patent ID: 6994917

Claim:
A composite material for a heat dissipating substrate on which an electronic component is mounted, wherein the composite material is formed by combining a first member and a second member, wherein the first member is a plate of an expanded metal including a plurality of strands and a plurality of bonding portions that bond the strands together, and the strands and the bonding portions define meshes wherein the expanded metal plate is flat so that the strands and the bonding portions are in the same plane, and wherein sides of each strand, which lie along the thickness direction of the composite material, are not perpendicular to a surface of the composite material, and wherein the linear expansion coefficient of the expanded metal is equal to or less than 8×10 −6 /° C., wherein the second member is a metal plate the thermal conductivity of which is equal to or more than 200 W/(m·K), wherein the meshes of the expanded metal plate is filled with a material of the metal plate, and wherein the volumetric ratio of the expanded metal plate to the composite material is in a range between 20% and 70%, inclusive.