Patent ID: 8860189
Filing Date: 2014-10-14
Classification: H01L

Abstract:
1. A PIN diode comprising: a semiconductor substrate that includes an N-type first semiconductor layer, and an N-type second semiconductor layer having lower impurity concentration than impurity concentration of the first semiconductor layer; a cathode electrode that is formed on an outer surface of the first semiconductor layer; a main anode region, a separated anode region, and an anode connecting region that are formed by selectively diffusing a P-type impurity from an outer surface of the second semiconductor layer; and an anode electrode that is formed on said main anode region, wherein: said main anode region has a substantially rectangular outer edge of which four sides are respectively adapted to be linear parts and four vertices are respectively adapted to be substantially arc-like curved parts; said separated anode region is annularly formed along the outer edge of said main anode region; and said anode connecting region is adapted to have a shape that is formed by protruding any one of an inner edge of said separated anode region and any of said linear parts to bring the any one into point contact with the other one, the inner edge and the linear parts facing each other.