Patent ID: 8373245

Claim:
A semiconductor device comprising: a base substrate; a semiconductor layer disposed on the base substrate, the semiconductor layer comprising a lower layer adjacent to the base substrate, an upper layer having a lower impurity concentration than that of the lower layer, a second semiconductor layer which is disposed on the upper layer and has a higher impurity concentration than that of the upper layer, and protrusions protruded upward provided on the upper layer, the second semiconductor layer being disposed on the protrusions; an ohmic electrode part which has ohmic electrode lines disposed in a first direction, on the semiconductor layer; and a Schottky electrode part which is disposed to be spaced apart from the ohmic electrode lines on the semiconductor layer and includes Schottky electrode lines disposed in the first direction, wherein the Schottky electrode lines and the ohmic electrode lines are alternately disposed in parallel and the ohmic electrode part further includes first ohmic electrodes covered by the Schottky electrode lines on the semiconductor layer.