| 摘要 |
A semiconductor device has a field effect transistor (FET), a mounting member, an output matching circuit board, a relay board, and first and second bonding wire. The FET includes plural cell regions arranged dispersedly and plural drain terminal electrodes connected to each cell region. The output matching circuit board is provided between an output conductive part and the FET, and has a first insulating substrate and a conductive part. A relay board is provided between the output matching circuit board and the FET. The relay board includes a second insulating substrate having a permittivity lower than a permittivity of the second insulating substrate of the output matching circuit board, and which has a relay conductive part on an upper surface of the second insulating substrate. |
