Patent ID: 7723846

Claim:
A power semiconductor module for mounting on a control circuit board of a main apparatus, the power semiconductor module comprising: at least one power semiconductor chip; leads having outer lead portions for connecting to the control circuit board of the main apparatus and inner lead portions connected to the at least one semiconductor chip; a terminal casing housing part of the leads; and an insulating circuit board housed in the terminal casing, wherein one major surface of the insulating circuit board forms a radiator plane, wherein the at least one semiconductor chip is mounted on another major surface, on a side opposite to the radiator plane, of the insulating circuit board, wherein the inner lead portions are connected to the at least one semiconductor chip on the another major surface, on the side opposite to the radiator plane, of the insulating circuit board, wherein the terminal casing comprises a main body and a pair of fastener mounting plates extending in the opposite directions from the main body thereof to facilitate mounting of a cooling fin such that the radiator plane of the insulating circuit board is brought into contact with the cooling fin, wherein each of the fastener mounting plates includes a fastener insertion hole, through which a fastener is insertable, wherein the terminal casing is filled with a thermosetting resin that hardens for insulating sealing, and wherein the radiator plane of the insulating circuit board protrudes outwardly beyond a contact plane formed by the fastener mounting plates to enable the radiator plane of the insulating circuit board to make contact with the cooling fin.