Patent ID: 7542317

Claim:
A semiconductor device comprising: a cooling metal plate; a plurality of high voltage side switching elements that are electrically connected parallel to each other and fixed in a line on one surface of the cooling metal plate, each of said plurality of high voltage side switching elements having an attached high voltage side interconnect conductor; a plurality of low voltage side switching elements that are electrically connected parallel to each other and fixed in a line on one surface of the cooling metal plate, each of said plurality of low voltage side switching elements having an attached low voltage side interconnect conductor; a positive polarity side terminal and a negative polarity side terminal for receiving DC electric power; an output terminal for outputting AC electric power; and a multilayered conductor that has a positive side conductive plate and a negative side conductive plate which are disposed to oppose each other with an insulator interposed; wherein the positive side conductive plate and the negative side conductive plate are electrically connected to the positive polarity side terminal and the negative polarity side terminal, respectively; the plurality of high voltage side switching elements are laid out in a line along the multilayered conductor; one of said high voltage side interconnect conductors is connected to the positive side conductive plate; the remaining high voltage side interconnect conductors are connected to the output terminal; the plurality of low voltage side switching elements are laid out in a line along the multilayered conductor; one of said low voltage side interconnect conductors is connected to the output terminal, respectively; and the remaining low voltage side interconnect conductors are connected to the negative side conductive plate, respectively.