Patent ID: 9054071
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A method of forming a semiconductor device, comprising the steps of: providing a semiconductor substrate, in which a first field plate area is defined over said substrate, a second field plate area is defined over said substrate adjacent to said first field plate area, and a third field plate area is defined over said semiconductor substrate adjacent to said second field plate area; forming a first dielectric layer over said semiconductor substrate; patterning said first dielectric layer so as to remove at least a portion of said first dielectric layer in at least one of said first field plate area, said second field plate area and said third field plate area; forming a second dielectric layer over said first dielectric layer and over said semiconductor substrate; forming a stepped field plate disposed over said first dielectric layer and said second dielectric layer in said first field plate area, said second field plate area and said third field plate area, so that: