Patent ID: 9419093
Filing Date: 2016-08-16
CPC Classification: H01L

Claim Text:
1. A method of forming a high electron mobility transistor (HEMT), the method comprising: forming a second III-V compound layer on a first III-V compound layer, wherein a carrier channel is located between the first III-V compound layer and the second III-V compound layer; forming a dielectric cap layer on the second III-V compound layer; forming a source feature and a drain feature on the second III-V compound layer, wherein at least one of the source feature or the drain feature extends into the second III-V compound layer; forming a protection layer on the dielectric cap layer; after forming the protection layer on the dielectric cap layer, depositing a p-type layer on a portion of the second III-V compound layer, a portion of the dielectric cap layer and a portion of the protection layer; and forming a gate electrode on the p-type layer.