Patent ID: 9266188
Filing Date: 2016-02-23
CPC Classification: B23K,B32B,C21D,C22C,C22F,Y10T

Claim Text:
1. An aluminum copper clad material comprising: an aluminum layer; a copper layer; and an Al—Cu intermetallic compound layer; wherein the aluminum layer and the copper layer are diffusion-bonded via the Al—Cu intermetallic compound layer; the copper layer satisfies Dcs≦0.5×Dcc, where Dcc represents an average crystal grain size of crystal grains in a central portion in a thickness direction of the copper layer, and Dcs represents an average crystal grain size of an interface adjacent portion in the copper layer that is about 0.5 μm apart from an interface between the copper layer and the intermetallic compound layer; and the intermetallic compound layer has an average thickness of about 0.5 μm to about 10 μm and includes broken up and dispersed aluminum oxide.