Patent ID: 7932152

Claim:
A method of forming an integrated circuit structure comprising: providing a substrate having a primary region and a secondary region, wherein the primary region of the substrate has a double gate (DG) portion and a single gate (SG) portion, and said secondary region corresponds to an extended gate (EG) portion of the substrate; forming a first layer of a first thickness over said substrate; removing a portion of said first layer to expose a first portion of said substrate; exposing the structure to an oxidizing medium to form a second layer comprising an oxide material over said first portion of said substrate, said second layer having a second thickness, and to convert at least a portion of said first layer to a third layer comprising an oxynitride material, said third layer having a third thickness; and forming a fourth layer over said SG portion and over said EG portion of the substrate and not over said DG portion of the substrate.