Patent ID: 8637965

Claim:
A semiconductor device comprising: a tab including a chip supporting surface, and a back surface opposite to the chip supporting surface; a plurality of suspension leads supporting the tab; a plurality of leads arranged between the suspension leads; a semiconductor chip mounted over the chip supporting surface of the tab, the semiconductor chip including a main surface, and a rear surface opposite to the main surface; a plurality of wires electrically connecting a plurality of pads of the semiconductor chip with the plurality of leads, respectively; a seal portion sealing the semiconductor chip and the plurality of wires such that a first part of each of the leads is exposed from the seal portion, and such that second and third parts of each of the leads are covered with the seal portion; a first plating film formed on the first part of each of the leads, and a second plating film formed on the second part of each of the leads; wherein each of the leads is comprised of copper; wherein the first plating film is comprised of Pb-free solder containing Sn as a major element; wherein the second plating film is comprised of silver; wherein the plurality of wires are connected with the plurality of leads, respectively, via the second plating film; and wherein a part of the rear surface of the semiconductor chip and the third part of each of the leads are contacted with the seal portion.