Patent ID: 10957773

Abstract:
According to one embodiment, a semiconductor device includes a first electrode, a first semiconductor region, a second semiconductor region, a third semiconductor region, a first ring-shaped region, a second ring-shaped region, a second electrode, a third electrode, a first conductive layer, and a semi-insulating layer. The first ring-shaped region surrounds the second semiconductor region, and is provided between the second and third semiconductor regions. The second ring-shaped region surrounds the first ring-shaped region, and is provided between the first ring-shaped region and the third semiconductor region. The first conductive layer surrounds the second electrode, and is provided on the first ring-shaped region, the second ring-shaped region, and a first region of the first semiconductor region with an insulating layer interposed. The first region is positioned between the first and second ring-shaped regions. The semi-insulating layer contacts the second electrode, the first conductive layer, and the third electrode.