Patent ID: 9478708
Filing Date: 2016-10-25
CPC Classification: H01L

Claim Text:
1. A method of forming a semiconductor structure, the method comprising: depositing a nitride layer on a semiconductor substrate; forming a trench through the nitride layer and into the semiconductor substrate; forming a gallium-nitride layer in the trench and above the semiconductor substrate and the nitride layer; forming a photoresist layer over a portion of the trench, wherein a covered portion of the gallium nitride layer is located below the photoresist layer, and wherein an uncovered portion of the gallium-nitride layer is located at least in the trench; removing the uncovered portion of the gallium-nitride layer and the photoresist layer; depositing an insulating layer between the covered portion of the gallium-nitride layer and the semiconductor substrate, wherein a portion of the insulating layer is located above the gallium nitride layer.