Patent ID: 7659144

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: (a) preparing first and second wiring substrates, each having first and second principal surfaces provided on opposite sides across a thickness thereof; (b) mounting a semiconductor chip for a first power transistor and a semiconductor chip for a first control circuit over the first principal surface of the first wiring substrate; (c) mounting a semiconductor chip for a second power transistor and a semiconductor chip for a second control circuit over the first principal surface of the second wiring substrate; (d) forming a first sealing body for sealing the semiconductor chip for the first power transistor and the semiconductor chip for the first control circuit; and (e) forming a second sealing body for sealing the semiconductor chip for the second power transistor and the semiconductor chip for the second control circuit, wherein an arrangement of external terminals, to be electrically connected to the semiconductor chip for the first control circuit, of the first wiring substrate and an arrangement of external terminals, to be electrically connected to the semiconductor chip for the second control circuit, of the second wiring substrate are identical, and wherein an arrangement of external terminals, to be electrically connected to the semiconductor chip for the first power transistor, of the first wiring substrate and an arrangement of external terminals, to be electrically connected to the semiconductor chip for the second power transistor, of the second wiring substrate are not identical.