Patent ID: 7211892

Claim:
A semiconductor device, comprising: an electrode pad, a metal layer formed on said electrode pad, and a metal bump formed on said metal layer, wherein said metal layer contains Au, said metal bump has an average bump height in one electrode pad per unit area of 100 μm or less and is made of solder mainly made of Sn, a concentration of Au of said metal layer dissolved in the solder of said metal bump is 1.3×10 −3 (Vol %) or less, said metal layer contains Pd in addition to Au, and said metal bump is characterized in that compound formed by reacting Pd of said metal layer formed on said electrode pad before connecting said metal bump with said metal bump is not present in a row within a range of 2 to 20 μm from the interface between said metal bump and the electrode pad on which said metal bump is connected.