Patent ID: 7943496
Filing Date: 2011-05-17
Classification: H01L

Abstract:
1. A method of manufacturing a GaN-based field effect transistor, comprising the steps of: performing an epitaxial growth of a channel layer that is formed of a GaN-based semiconductor on to a substrate; performing an epitaxial growth of an electron supplying layer which is formed of a GaN-based semiconductor on to said channel layer, that has a larger band gap energy than that of said channel layer; forming a recess part that has a bottom face to be as a surface of said channel layer, by etching and removing a part of said electron supplying layer, and then by exposing said surface; forming a source electrode and a drain electrode on to said electron supplying layer; forming a first insulating film on to a surface at an inner side of said recess part, on to said electron supplying layer, on to said source electrode and on to said drain electrode, respectively; performing an alloying process in order to perform an annealing for said source electrode and for said drain electrode; removing said first insulating film after performing said alloying process; forming a second insulating film on to a surface at said inner side of said recess part, on to said electron supplying layer, on to said source electrode and on to said drain electrode, respectively; and forming a gate electrode on to said second insulating film at said recess part.