Patent ID: 9099433
Filing Date: 2015-08-04
Classification: H01L

Abstract:
1. A method of forming gallium nitride transistor, comprising: providing a substrate with a gallium nitride layer covered by a passivation surface layer; forming a mask with a first mask opening overlying the passivation surface layer; etching the passivation surface layer using the first mask opening in the mask to expose a gate contact surface of the substrate under the first mask opening; forming a conductive gate electrode comprising a contact base portion in contact with the gate contact surface of the substrate and gate electrode sidewall extensions that overlap with the passivation surface layer and are vertically spaced above the passivation surface layer by a vertical gap; forming a first plurality of patterned conductor layers to define source/drain electrode layers in electrical contact with the substrate and to define one or more bottom capacitor plate layers which are electrically isolated from the substrate; forming a conformal Al forming a second plurality of patterned conductor layers after forming the conformal Al