Patent ID: 7935985
Filing Date: 2011-05-03
Classification: H01L

Abstract:
1. A method for fabricating nitrogen face (N-face) High Electron Mobility Transistor (HEMT) device, comprising: (a) depositing a channel GaN layer on or above an AlGaN barrier layer so that a two dimensional electron gas (2DEG) channel forms in the channel GaN layer; (b) depositing a gate and an insulator between the gate and the channel GaN layer; (c) depositing a plurality of n-type AlGaInN layers on opposite sides of the insulator, the plurality of n-type AlGaInN layers contacting the channel GaN layer; and (d) depositing a source and a drain on the plurality of n-type AlGaInN layers and on opposite sides of the gate; wherein: the AlGaN barrier layer, the channel GaN layer, and the plurality of n-type AlGaInN layers are N-face layers, and the HEMT device is characterized as having one or more ohmic contacts made to the 2DEG without having to go through the AlGaN barrier layer.