Patent ID: 7589400

Claim:
An inverter on board of a vehicle for converting a direct current supplied from a direct current power source to an alternating current for driving a motor on board of said vehicle, wherein: said inverter has a plurality of arms for conducting and cutting off the current and said each arm has a plurality of switching devices and a first and a second wiring layer for connecting said switching devices, the plurality of switching devices in said each arm are constituted so that they are connected in parallel electrically, said first and second wiring layers of said each arm are respectively formed on an insulating substrate and one face of said switching devices is fixed to said first wiring layer, said second wiring layer and the other faces of said switching devices are electrically connected by a laminal conductor, said laminal conductor is arranged ranging over said plurality of switching devices, and has first connecting portions fixed to the other faces of said switching devices and second connecting portion fixed to the second wiring layer, and said laminal conductor is equipped with slits which divide said first connecting portions for each of said switching devices.