Patent ID: 7195981

Claim:
A method of forming an integrated circuit employable with a power converter, comprising: providing a semiconductor substrate; forming a power switch of a power train of said power converter on said semiconductor substrate; and forming a driver switch of a driver configured to provide a drive signal to said power switch and embodied in a transistor, including: forming a gate over said semiconductor substrate, forming a source/drain by: forming a lightly doped region adjacent a channel region recessed into said semiconductor substrate, and forming a heavily doped region adjacent said lightly doped region, forming an oppositely doped well with respect to said lightly and heavily doped regions under and within said channel region, forming a doped region adjacent said lightly doped region and between said heavily doped region and said oppositely doped well, said doped region having a doping concentration profile different from a doping concentration profile of said lightly doped region and less than a doping concentration profile of said heavily doped region, and forming an oppositely doped buried layer with respect to and under said doped region.