Patent ID: 8294272

Claim:
A power module comprising: a plate-shaped output electrode; a pair of power devices stacked with the output electrode arranged between the pair of power devices, the output electrode being laminated to the pair of power devices in part of a stacked area of the power devices; and an N-electrode laminated to one of the power devices, and a P-electrode laminated to the other power device, the N-electrode and the P-electrode being laminated to surfaces of the power devices that face one another, in a region of the stacked area where the output electrode is not laminated to the power devices, wherein the output electrode is anisotropic such that thermal conductivity in a direction orthogonal to a stacking direction in which the N-electrode and the P-electrode are stacked is greater than thermal conductivity in the stacking direction, and the output electrode extends in the orthogonal direction from the stacked area where the pair of power devices are stacked, and the N-electrode and the P-electrode extend in the orthogonal direction while maintaining an opposing positional relationship.