Patent ID: 8207582

Claim:
A semiconductor device comprising: at least one dual gate structure comprising: a first gate stack comprising: a first conductive gate structure at least substantially comprised of a first material; a first high-K dielectric structure positioned between the first conductive gate structure and a semiconductor substrate; and a conductive structure at least substantially comprised of a second material having a work function different than a work function of the first conductive gate structure, wherein the first conductive gate structure is positioned between the conductive structure and the first high-K dielectric structure; and a second gate stack comprising: a dielectric structure at least substantially comprised of an oxide of the first material, the dielectric structure having a thickness at least substantially identical to a thickness of the first conductive gate structure; a second high-K dielectric structure positioned between the dielectric structure and the semiconductor substrate; and a second conductive gate structure, wherein the dielectric structure is positioned between the second conductive gate structure and the second high-K dielectric structure; and wherein the second conductive gate structure of the second gate stack consists essentially of the same material as the conductive structure of the first gate stack, and wherein the second conductive gate structure of the second gate stack has a thickness at least substantially identical to a thickness of the conductive structure of the first gate stack.