Patent ID: 8471417

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 elements, 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; wherein the low-voltage side switching elements, the high-voltage side switching elements, the inverter input terminals, the coil terminals, the inverter ground terminals and the control terminals are integrally molded in the molded portion, wherein multiple terminal groups are formed, in each of which the inverter input terminal, the coil terminal and the inverter ground terminal are arranged in this order and neighboring to one another, wherein the multiple terminal groups include a first terminal group, a second terminal group and a third terminal group, and each of the terminal groups corresponds to the respective phase coils, wherein in each of the first and the third terminal groups, the inverter input terminal, the coil terminal and the inverter ground terminal are arranged in this order from one longitudinal side of the molded portion, and wherein in the second terminal group neighboring to the first and the third terminal groups, the inverter ground terminal, the coil terminal and the inverter input terminal are arranged in this order from the longitudinal side of the molded portion.