Patent ID: 7816214
Filing Date: 2010-10-19
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure, the method comprising: providing a substrate; forming a first well region of a first conductivity type overlying the substrate using a first photo resist, wherein the first photo resist has a first edge in a first vertical plane; removing the first photo resist; forming a second well region of a second conductivity type opposite the first conductivity type overlying the substrate using a second photo resist, with a cushion region is formed adjoining the first well region and the second well region, wherein the first edge of the first photo resist is substantially directly over the cushion region, and the second photo resist has a second edge substantially directly over the cushion region, and wherein the second edge is in a second vertical plane parallel to, and spaced apart from, the first vertical plane; forming an insulation region in a portion of the first well region and extending from a top surface of the first well region into the first well region; forming a gate dielectric extending from over the first well region to over the second well region, wherein the gate dielectric has a portion over the insulation region; and forming a gate electrode on the gate dielectric.