Patent ID: 8283747
Filing Date: 2012-10-09
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first conduction type semiconductor layer; a second conduction type element forming region formed above the first conduction type semiconductor layer and formed with at least one semiconductor element formed on a surface region of the second conduction type element forming region; a first conduction type element-isolation region that insulates and segregates the second conduction type element forming region from the exterior; a second conduction type buried region formed at the interface of the first conduction type semiconductor layer and the second conduction type element forming region, separated from the first conduction type element-isolation region; and a second conduction type high concentration region buried in a surface of the second conduction type element forming region and also formed to surround the semiconductor element and separated from the first conduction type element-isolation region; wherein when viewed from a direction orthogonal to a surface plane of the first conduction type semiconductor layer, an end portion at the first conduction type element-isolation region side of the second conduction type high concentration region extends into a region between the second conduction type buried region and the first conduction type element-isolation region.