Patent ID: 7944052

Claim:
A semiconductor device, comprising: a semiconductor chip; an electrode pad provided in the semiconductor chip, the electrode pad comprising Al as a major constituent and further comprising Cu; a coupling member coupled to the electrode pad, the coupling member primarily comprising Cu; a plurality of layers of Cu and Al alloys formed between the electrode pad and the coupling member; and an encapsulating resin comprising a halogen of less than or equal to 1000 ppm, the encapsulating resin encapsulating the semiconductor chip, the electrode pad, and the coupling member, wherein the plurality of layers of Cu and Al alloys comprises: a CuAl 2 layer formed on the electrode pad; a CuAl layer formed on the CuAl 2 layer; and a layer including one of Cu 9 Al 4 and Cu 3 Al 2 formed on the CuAl layer.