Patent ID: 9111957
Filing Date: 2015-08-18
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure, the method comprising: forming and patterning a first photo resist over a substrate; forming a first well region of a first conductivity type overlying the substrate using the first photo resist, wherein the first photo resist covers a selected region over the substrate; removing the first photo resist; forming and patterning a second photo resist over the substrate; forming a second well region of a second conductivity type opposite the first conductivity type overlying the substrate using the second photo resist, wherein the second photo resist covers the selected region, and wherein the first well region and the second well region are horizontally spaced apart from each other by the selected region; 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 an edge directly over the insulation region; and forming a gate electrode on the gate dielectric.