Patent ID: 9478604
Filing Date: 2016-10-25
CPC Classification: H01L

Claim Text:
1. A Schottky barrier diode, comprising: a silicon carbide semiconductor substrate having a silicon surface and a carbon surface; an ohmic metal layer joined to the carbon surface of the silicon carbide semiconductor substrate in an ohmic contact; a Schottky metal layer joined to the silicon surface of the silicon carbide semiconductor substrate in a Schottky contact and composed of the same material as that composing the ohmic metal layer; and a multi-layer metal structure including the Schottky metal layer and another metal layer formed on a surface of the Schottky metal layer, the another metal layer being composed of a metal material different from that of the Schottky metal layer, wherein the Schottky metal layer is composed of molybdenum, and the another metal layer is composed of any one of aluminum, an aluminum-silicon alloy, and an aluminum-silicon-copper alloy.