Semiconductor Device and Inverter Provided With Semiconductor Device

A semiconductor device provided in an inverter, the semiconductor device comprising:

• a positive electrode wiring board provided with a positive electrode terminal;
• a negative electrode wiring board provided with a negative electrode terminal;
• and
• an alternating-current wiring board provided with an alternating-current terminal, on an insulation layer of a substrate included in the semiconductor device,
• wherein the positive electrode wiring board has a plurality of upper arm semiconductor elements electrically connected in parallel,
• the alternating-current wiring board has a plurality of lower arm semiconductor elements electrically connected in parallel,
• the plurality of upper arm semiconductor elements and the alternating-current wiring board being electrically connected to each other by first wiring members, respectively, and
• the plurality of lower arm semiconductor elements and the negative electrode wiring board being electrically connected to each other by second wiring members, respectively,
• the alternating-current wiring board has a first region to which the first wiring members are connected, a second region in which the plurality of lower arm semiconductor elements are provided, and a connection region that connects the first region and the second region,
• the connection region being provided at a position opposite to the positive electrode terminal and the negative electrode terminal with a region in between where the first wiring member connects the positive electrode wiring board and the first region and a region in between where the second wiring member connects the negative electrode wiring board and the second region, and
• the positive electrode wiring board, the negative electrode wiring board, the first region, and the second region are arranged on the insulation layer in the order of the positive electrode wiring board, the negative electrode wiring board, the first region, and the second region.