Patent ID: 9425267
Filing Date: 2016-08-23
CPC Classification: H01L

Claim Text:
1. A transistor device, comprising: a substrate; a passivation surface layer covering the substrate with a gate electrode opening formed therein; a conductive gate electrode located in the gate electrode opening to be in contact with the substrate; a first dielectric layer over the conductive gate electrode; a charged dielectric layer over at least a portion of the first dielectric layer and overlapping at least a portion of the conductive gate electrode, the charged dielectric layer including open bonds to provide a fixed charge density in the charged dielectric layer; a field plate overlapping at least a portion of the charged dielectric layer; and a circuit, the circuit coupled to the field plate, the circuit configured to drive the field plate to cause the field plate to inject charge into the charged dielectric layer until the charged dielectric layer has sheet charge density of at least 5E10