Patent ID: 9397231
Filing Date: 2016-07-19
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: an epitaxial layer of a first conductive type; an anode electrode and a cathode electrode on the epitaxial layer; a first drift layer of the first conductive type at the epitaxial layer; a Schottky contact area at a region of contact between the anode electrode and the first drift layer; an impurity region of a second conductive type different from the first conductive type at the epitaxial layer; and an insular impurity region formed below the Schottky contact area and the below the anode electrode, the insular impurity region directly adjacent the impurity region, wherein a conductive type of the insular impurity region is the same as the first conductive type, and wherein the cathode electrode comprises first and second cathode electrodes, the first cathode electrode has a dot shape, the anode electrode is constructed and arranged to surround the first cathode electrode, and the second cathode electrode is constructed and arranged to surround the anode electrode.