Patent ID: 9082836
Filing Date: 2015-07-14
Classification: H01L

Abstract:
1. A field effect transistor comprising: a stacked body including a channel layer and an electron supply layer, and made of a nitride semiconductor; a source electrode provided on a surface of the stacked body; a drain electrode provided on the surface of the stacked body; a gate electrode provided on the surface of the electron supply layer between the source electrode and the drain electrode and having a field plate portion, the gate electrode constituting a Schottky barrier to the electron supply layer; a dielectric layer provided so as to cover an intersection line of a first side surface of the gate electrode on the drain electrode side and the surface of the electron supply layer and having a relative permittivity higher than a relative permittivity of the surface of the electron supply layer; and a silicon nitride layer provided so as to cover a region between the source electrode and the gate electrode and a region between the dielectric layer and the drain electrode on the surface of the stacked body, the field plate portion provided above the dielectric layer to protrude from the first side surface of the gate electrode toward the drain electrode side.