Patent ID: 8467193

Claim:
An electronic control unit comprising: a plate member made of metal; a resin board fixed to the plate member; a semi-conductor module mounted on a first surface of the resin board, which is formed on a side opposite to the plate member; a control portion for controlling switching operation of the semi-conductor module; a capacitor mounted on the first surface for smoothing electric current flowing through the semi-conductor module; a first ground pattern provided on, the first surface for electrically connecting a ground terminal of the semi-conductor module with a ground terminal of the capacitor; a fixing member which is made of metal, extending through the first ground pattern and the resin board, and fixed to the plate member, in order not only to fix the resin board to the plate member but also to electrically connect the first ground pattern to the plate member; and a connector provided on the first surface of the resin board at such an area opposing to the semi-conductor module so that the first ground pattern is interposed between the semi-conductor module and the connector, a wire harness being connected to the connector for supplying electric current to the semi-conductor module.