Patent ID: 7608917

Claim:
A power semiconductor module comprising: a power semiconductor device having a main electrode and a control electrode formed on a circuit face and a rear electrode formed on a face opposite to the circuit face; a ceramic substrate with printed circuit having metal electrodes formed on both faces of the ceramic substrate, the metal electrode being joined to the rear electrode of the power semiconductor device; a lead having metal electrodes formed on both faces of a ceramic substrate, the metal electrode being joined to the main electrode and the control electrode of the power semiconductor device; and a mold resin having a coefficient of thermal expansion of 10 ppm/K or less for sealing the ceramic substrate with printed circuit, the power semiconductor device and the lead so as to expose metal electrodes on a side of the ceramic substrate with printed circuit that is not joined to the power semiconductor device and metal electrodes on a side of the lead that is not joined to the power semiconductor device to outside.