Patent ID: 9437708
Filing Date: 2016-09-06
CPC Classification: H01L

Claim Text:
1. A method of forming a III-N semiconductor device, comprising: forming a nitride channel layer, the composition of the nitride channel layer being selected from the group consisting of nitrides of gallium, indium, aluminum, and combinations thereof; forming an AlXN layer adjacent the channel layer in the areas adjacent to the channel access regions but not in the area adjacent to the first channel region, wherein X is selected from the group consisting of gallium, indium or their combination; and forming a gate, wherein the nitride channel layer includes a first channel region beneath the gate, and channel access regions on opposite sides of the first channel region; wherein the concentration of Al and thickness of the AlXN layer is selected to induce a 2DEG charge in the channel access regions adjacent the AlXN layer without inducing any substantial 2DEG charge in the first channel region, so that a channel comprising the 2DEG charge is not conductive in the absence of a switching voltage applied to the gate, but is conductive when a switching voltage greater than a device threshold voltage is applied to the gate.