Patent ID: 8536687

Claim:
A semiconductor device comprising: (a) a heat sink having a first front surface and a first back surface located on the opposite side to the first front surface; (b) a lead portion having a plurality of leads and a chip placement portion having a second front surface and a second back surface located on the opposite side to the second front surface; (c) a semiconductor chip placed over the second front surface of the chip placement portion; and (d) a sealing body sealing part of the heat sink, part of the lead portion, and the semiconductor chip, wherein the semiconductor chip and the leads comprising the lead portion are electrically coupled with each other, and wherein in the sealing body, the first front surface of the heat sink and the second back surface of the chip placement portion are placed opposite to each other, wherein the semiconductor chip is a chip including a power transistor and having a source pad and a gate pad in the chip front surface and a drain electrode in a chip back surface located on the opposite side to the chip front surface, wherein the lead portion includes a source lead, a gate lead, and a drain lead, wherein the chip placement portion and the drain lead are joined with each other, wherein the second front surface of the chip placement portion and the drain electrode are electrically coupled with each other through a first conductive member, wherein the source pad and the source lead are electrically coupled with each other through a second conductive member, and wherein the gate pad and the gate lead are electrically coupled with each other through a third conductive member.