Patent ID: 7872285
Filing Date: 2011-01-18
Classification: H01L

Abstract:
1. A vertical gallium nitride semiconductor device furnished with: a gallium nitride support base of n a gallium nitride epitaxial film of n a laminar region, of not greater than 1 μm thickness, including the interface between said gallium nitride support base and said gallium nitride epitaxial film, where either said gallium nitride support base or said gallium nitride epitaxial film has at least either silicon or germanium as donor impurities at a concentration, along an axis from said gallium nitride support base to said gallium nitride epitaxial film, of not less than 1×10 a gate insulating film provided on said gallium nitride epitaxial film; a gate electrode provided on said gate insulating film; a p-type conductivity region provided on said gallium nitride epitaxial film; an n a source electrode provided on said n a drain electrode provided on a back side of said gallium nitride support base.