Patent ID: 8337997

Claim:
A composite material for an electrical/electronic part, which is used as a material for use in an electrical/electronic part, comprising: a metal base material having at least a surface formed of Cu or a Cu alloy; and an insulating film provided on at least a part of the metal base material; wherein a metal layer having Cu diffused in Ni or a Ni alloy is interposed between the metal base material and the insulating film, wherein the metal layer is subjected to a heat treatment at 150° C. to 400° C. for 5 to 30 seconds; wherein the ratio of the number of Cu atoms to the number of Ni atoms (Cu/Ni) obtained by analyzing an outermost surface of the metal layer by Auger electron spectroscopy is from 0.005 to 0.483; wherein the metal layer has a thickness of 0.001 to 0.05 μm; and wherein the insulating film is composed of a polyamide-imide.