Patent ID: 9590048
Date: 2017-03-07
CPC Classifications: H01L

Claim:
1. A high electron mobility transistor (HEMT) electronic device, comprising: a semiconductor layer having a surface, wherein the semiconductor layer comprises a gallium nitride layer, an aluminum gallium nitride layer above the gallium nitride layer, and a gallium nitride cap layer on the aluminum gallium nitride layer; a gate and a first current electrode on the surface, wherein the gate is arranged laterally between a source and a drain of the HEMT; and a dielectric layer on the surface of the semiconductor layer and extending laterally between the gate and the first current electrode and comprising charged ions having a predetermined charge profile which shapes an electric field distribution between the gate and the first current electrode so as to make the electric field distribution more uniform between the gate and the first current electrode, wherein the dielectric layer comprises a first region positioned on the aluminum gallium nitride layer between the source and the gate, a second region positioned on the aluminum gallium nitride layer between the gate and the drain, an insulating layer on the gallium nitride cap layer which extends between the source and the gate and between the gate and the drain, and a passivation layer arranged on the insulating layer which extends between the source and the gate and between the gate and the drain, wherein the charged ions are disposed in at least the second region of the dielectric layer extending between the gate and the drain.