Patent ID: 7928480

Claim:
A semiconductor device, comprising: a semiconductor layer; a non-ohmic first electrode formed on the semiconductor layer; and an ohmic second electrode formed on the semiconductor layer apart from the first electrode, wherein the second electrode has a linear edge that faces the first electrode and is in contact with the semiconductor layer and, the linear edge of the second electrode extends in an X-axis direction, a direction of thickness of the semiconductor layer extends in a Z-axis direction and is orthogonal to the X-axis direction, and a direction orthogonal to the Z-axis and X-axis directions is a Y-axis direction, a section of the entire first electrode taken along a plane extending in the Y-axis direction and the Z-axis direction has a shape of a polygon, and a first corner of the first electrode polygon adjacent the second electrode is at the semiconductor layer and said first corner of said first electrode comprises converging first and second linear edges, wherein the first linear edge extends parallel to the Y-axis direction and the first corner of the first electrode has an obtuse interior angle of which an outward extension line of a bisector crosses the semiconductor layer and the first electrode has a second corner and a third corner, the third corner between the first corner and the second corner and the third corner has an obtuse interior angle of which an outward extension line of a bisector crosses the semiconductor layer.