Patent ID: 7420283

Claim:
A semiconductor device having a construction comprising: a plurality of power MOS cells disposed on a semiconductor substrate; a plurality of lead wires connecting to a source and a drain of each power MOS cell through a contact hole for retrieving electric potential of each of the source and the drain; a plurality of collecting electrodes connecting in parallel with the lead wires of each of the source and the drain through a via hole for collecting electric potentials; an interlayer protection film formed on the collecting electrode of each of the source and the drain, wherein a plurality of openings is formed in the interlayer protection film in such a manner that a portion between the openings becomes a beam shape; a thick film electrode connecting to the collecting electrode of each of the source and the drain through a first barrier layer in the opening and made of material having a mechanical strength higher than that of a material composing the collecting electrode, wherein a top and whole side surfaces of the thick film electrode are covered with an aluminum film or an aluminum alloy film through a second barrier layer; and a terminal protection film for covering the thick film electrode and having an opening for a bonding connection.