Patent ID: 7759699
Filing Date: 2010-07-20
Classification: H01L

Abstract:
1. A power semiconductor device comprising: a substrate; a nitrogen polar active heterojunction having a two dimensional electron gas that includes a first III-nitride semiconductor body having one band gap, and a second III-nitride semiconductor body having another band gap over said first III-nitride semiconductor body; a gate arrangement coupled to at least said second III-nitride semiconductor body; a gate barrier interposed between said gate arrangement and said second III-nitride semiconductor body to provide an added potential to pull a conduction band above a Fermi level thereof to interrupt said two dimensional electron gas when said gate arrangement is not biased; and a first power electrode and a second power electrode coupled to at least said second III-nitride semiconductor body; wherein said another band gap of said second III-nitride semiconductor body is smaller than said one band gap of said first III-nitride semiconductor body.