Patent ID: 8649159

Claim:
A semiconductor module device, which is provided between a power wiring portion for larger electric current to be supplied to phase coils and a control wiring portion for controlling current supply to the phase coils, comprising: low-voltage side switching elements, which form a part of an inverter circuit and which are provided on a ground side, for switching on and off the current supply to the phase coils; high-voltage side switching elements, which form a part of the inverter circuit and which are provided on a higher voltage side than the low-voltage side switching element, for switching on and off the current supply to the phase coils; inverter input terminals provided in a molded portion at a side thereof facing to the power wiring portion for connecting the high-voltage side switching elements to a power source portion; coil terminals provided in the molded portion at the side thereof facing to the power wiring portion for connecting the high-voltage side switching elements as well as the low-voltage side switching elements to the phase coils; inverter ground terminals provided in the molded portion at the side thereof facing to the power wiring portion for connecting the low-voltage side switching elements to the ground; control terminals provided in the molded portion at another side thereof facing to the control wiring portion, through which control signals for switching on and off the high-voltage side switching elements as well as the low-voltage side switching elements are inputted; a control power input terminal for supplying electric power from the power wiring portion to the control wiring portion; a control ground terminal for connecting the control wiring portion to a ground portion of the power wiring portion; wherein the low-voltage side switching elements, the high-voltage side switching elements, the inverter input terminals, the coil terminals, the inverter ground terminals, the control terminals, the control power input terminal and the control ground terminal are integrally molded in the molded portion.