Patent ID: 8159068

Claim:
A semiconductor device comprising: a semiconductor layer composed of one of GaAs-based semiconductor, InP-based semiconductor, and GaN-based semiconductor; a first silicon nitride film that is provided on the semiconductor layer, and of which an end portion is in contact with a surface of the semiconductor layer; a protective film that is composed of one of polyimide and benzocyclobutene, and is provided on the semiconductor layer and the first silicon nitride film, the protective film covering the end portion of the first silicon nitride film; and a first metallic layer that is composed of one of titanium, tantalum and platinum, and is continuously provided from a first portion located between the semiconductor layer and the protective film to a second portion located between the end portion of the first silicon nitride film and the protective film, the first metallic layer being partially in contact with the surface of the semiconductor layer and a surface of the end portion of the first silicon nitride film.