Patent ID: 8168485

Claim:
A method of making a semiconductor device comprising: forming a p-type semiconductor region to an n-type semiconductor substrate of silicon carbide (SiC) in such a manner that the p-type semiconductor region is partially exposed to a top surface of the semiconductor substrate; forming a Schottky electrode of titanium (Ti) or molybdenum (Mo) in such a manner that the Schottky electrode is in Schottky contact with an n-type semiconductor region of the semiconductor substrate, the n-type semiconductor region being exposed to the top surface of the semiconductor substrate; forming an ohmic electrode of nickel (Ni) in such a manner that the ohmic electrode is in ohmic contact with the exposed p-type semiconductor region; and annealing the ohmic electrode at 400° C. or more, wherein the forming of the Schottky electrode is performed earlier than the forming of the ohmic, and the forming of the ohmic electrode includes covering at least a portion of the Schottky electrode from above with the ohmic electrode.