Patent ID: 9293561
Filing Date: 2016-03-22
CPC Classification: H01L

Claim Text:
1. A method of forming a III-N device, comprising: forming a first III-N material layer on a buffer layer; forming a second III-N material layer on an opposite side of the first III-N material layer from the buffer layer, wherein the first III-N material layer is a channel layer and a compositional difference between the first III-N material layer and the second III-N material layer induces a 2DEG channel in the first III-N material layer; and forming a dispersion blocking layer between the buffer layer and the channel layer, the dispersion blocking layer being doped with Fe, Mg, Be, C, or Zn; wherein a sheet or a distribution of negative charge at an interface of the channel layer and the dispersion blocking layer confines electrons away from the buffer layer; a band-edge discontinuity at the interface of the channel layer and the dispersion blocking layer results in a conduction band edge directly adjacent to the interface being higher in the dispersion blocking layer than in the channel layer; and a conduction band minimum of the dispersion blocking layer is within the dispersion blocking layer and away from the interface.