Patent ID: 8963234
Filing Date: 2015-02-24
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate made of a compound semiconductor and having a recess, which opens at one main surface thereof and has side wall surfaces; a gate insulating film disposed on and in contact with each of said side wall surfaces; and a gate electrode disposed on and in contact with said gate insulating film, said substrate including said recess having a closed shape when viewed in a plan view, said side wall surfaces providing an outwardly projecting shape in every direction when viewed from an arbitrary location in said recess, wherein said side wall surface of said recess includes a first plane having a plane orientation of {0-33-8}, wherein said side wall surface of said recess microscopically includes said first plane, and said side wall surface microscopically further includes a second plane having a plane orientation of {0-11-1} , and wherein said first plane and said second plane of said side wall surface of said recess includes a combined plane having a plane orientation of {0-11-2}.