Patent ID: 8178940

Claim:
In a Schottky barrier diode comprising a Schottky electrode formed on the surface of a silicon carbide epitaxial film grown from the surface of a silicon carbide single-crystal substrate, and a pad electrode formed on the Schottky electrode for being electrically connected to the outside, the improvement comprising an intermediate metal film between the Schottky electrode and the pad electrode, wherein a Schottky barrier height between the intermediate metal film and the silicon carbide epitaxial film is equivalent to or higher than a Schottky barrier height between the Schottky electrode and the silicon carbide epitaxial film and a Schottky barrier height between the pad electrode and the silicon carbide epitaxial film is lower than the Schottk barrier height between the Schottky electrode and the silicon carbide epitaxial film and wherein the Schottky electrode is made of W, the intermediate metal film is made of Ni and the pad electrode is made of Mo or Ti.