Patent ID: 8604513
Filing Date: 2013-12-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: an SOI substrate having a support substrate, an embedded insulation film and an active layer, which are stacked in this order, wherein the active layer is made of silicon having a first conductive type; a semiconductor element having a first impurity layer and a second impurity layer, which are disposed in a surface portion of the active layer, wherein the second impurity layer surrounds the first impurity layer so that the first impurity layer and the second impurity layer have a first layout; and a plurality of first conductive type regions and a plurality of second conductive type regions, which are disposed in a part of the active layer adjacent to the embedded insulation film, wherein the first conductive type regions and the second conductive type regions are alternately arranged, wherein the first conductive type regions and the second conductive type regions have a second layout, which corresponds to the semiconductor element, wherein the semiconductor element is a PN diode, wherein the first impurity layer is a cathode region having the first conductive type, and the second impurity layer is an anode region having a second conductive type, wherein the PN diode further includes a cathode electrode electrically coupled with the cathode region and an anode electrode electrically coupled with the anode region, wherein the second conductive type regions include a center region, which faces the cathode region, and wherein the first conductive type regions and the second conductive type regions surround the center region.