Patent ID: 8530281

Claim:
A method of producing a semiconductor module which includes a resin molded package and a coolant path comprising: a first step of preparing a semiconductor sub-assembly of a power semiconductor chip, a first heat spreader, a second heat spreader, and electric terminals, the power semiconductor chip having a first and a second surface opposed to each other and being equipped with a semiconductor power device connecting with the electric terminals; a second step of forming a thermoplastic resin-made mold which defines a shell of the resin molded package; a third step of placing the thermoplastic resin-made mold and the semiconductor sub-assembly in a given molding tool and then forming a thermosetting resin-made mold inside the thermoplastic resin-made mold to make, as the resin molded package, a resin-molded assembly in which a coolant path defining said coolant path is formed, the first heat spreader being disposed in connection with the first surface of the power semiconductor chip, the second heat spreader being disposed in connection with the second surface of the power semiconductor chip, each of the electric terminals having a portion exposed from the resin-molded assembly, material for the thermosetting resin-made mold being higher in glass transition temperature than that for the thermoplastic resin-made mold; and a fourth step of holding the resin molded package through covers to complete the semiconductor module.