Patent ID: 7846831

Claim:
A method of manufacturing a semiconductor device having a bump, comprising: providing a substrate; forming a semiconductor chip on the substrate; forming a first electrode pad area on the semiconductor chip, the first electrode pad area having a plurality of electrode pads, a top electrode pad among the plurality of electrode pads comprising a first metal; forming a second electrode pad area on the semiconductor chip, the second electrode pad area having a plurality of electrode pads, a top electrode pad among the plurality of electrode pads comprising a second metal; and electroless plating of the first and second electrode pad areas, thereby forming a bump on the first electrode pad area, and not forming a bump on the second electrode pad area, wherein the bump directly contacts the top electrode pad of the first electrode pad area, the first metal has an ionization tendency higher than that of the bump, and the second metal has an ionization tendency lower than that of the bump.