Patent ID: 7547966

Claim:
A power semiconductor module comprising power semiconductor chips; first insulating substrates having metal electrode layers disposed on their surfaces, the metal electrode layers being joined to first principal surfaces of the power semiconductor chips; second insulating substrates having metal electrode layers disposed on their surfaces, the metal electrode layers being joined to second principal surfaces of the power semiconductor chips; a first heat spreader disposed on rear surfaces of the first insulating substrates; a second heat spreader disposed on rear surfaces of the second insulating substrates; and a resin member for sealing the power semiconductor chips, and the first and second insulating substrates therein, wherein the first and second insulating substrates have rear metal layers disposed on their rear surfaces, respectively; one surface of the first heat spreader is joined to the rear metal electrodes of the first insulating substrates by using brazing, to achieve connection between the first heat spreader and the first insulating substrates; one surface of the second heat spreader is joined to the rear metal electrodes of the second insulating substrates by using brazing, to achieve connection between the second heat spreader and the second insulating substrates; and heat radiating fins are provided on the other surface of at least one of the first and second heat spreaders.