Patent ID: 8208260

Claim:
A semiconductor device comprising: a first output unit configured to output a first phase; a second output unit disposed to be stacked on the first output unit and configured to output a second phase different from the first phase; and a controller configured to control the output units, wherein: the output unit further includes a high voltage unit and a low voltage unit which is supplied with power having a voltage lower than that applied to the high voltage unit, the high voltage unit and the low voltage unit are stacked, the first and second output units are provided upright on the controller, each of the first and second output units further includes a radiator plate for conducting heat in a direction different from a direction in which the controller is disposed, the radiator plate is formed of a thermally conductive anisotropic material having a higher thermal conductivity in a first direction perpendicular to the radiator plate than a second direction in which the controller is arranged, the first direction being different from the second direction, and the thermally conductive anisotropic material has aligned carbon fibers buried in aluminum.