Patent ID: 9525054
Filing Date: 2016-12-20
CPC Classification: H01L

Claim Text:
1. A High Electron Mobility Transistor (HEMT) comprising: a first III-V compound layer comprising gallium nitride; a second III-V compound layer over the first III-V compound layer, wherein the second III-V compound layer comprises indium gallium nitride; a third III-V compound layer over the second III-V compound layer, wherein the third III-V compound layer comprises aluminum gallium nitride, wherein the first III-V compound layer, the second III-V compound layer, and the third III-V compound layer are configured so that a Two-Dimensional Electron Gas (2DEG) is formed in the second III-V compound layer and close to an interface between the second III-V compound layer and the third III-V compound layer; a dielectric passivation layer disposed over the third III-V compound layer, with a bottom surface of the dielectric passivation layer contacting a first portion of a planar upmost top surface of the third III-V compound layer; a gate dielectric comprising: a gate electrode over and contacting the gate dielectric; and a source region and a drain region over the third III-V compound layer and on opposite sides of the gate electrode, wherein the source region and the drain region penetrate through the dielectric passivation layer and the third III-V compound layer, wherein the dielectric passivation layer laterally surrounds each of the source region and the drain region, the gate dielectric and the dielectric passivation layer both extend from a first side to an opposite second side of one of the source region and the drain region, and the gate dielectric extends continuously from the source region to the drain region.