Patent ID: 8513739

Claim:
An integrated circuit structure comprising: a substrate; a first field effect transistor on said substrate and comprising: a first semiconductor body, having a conduction band energy and a valence band energy; and a first gate structure adjacent to said first semiconductor body, said first gate structure comprising a first gate dielectric layer, and said first gate structure having a first effective work-function that is between said conduction band energy and said valence band energy; and a second field effect transistor on said substrate, said second field effect transistor having a same conductivity type as said first field effect transistor and comprising: a second semiconductor body; and a second gate structure adjacent to said second semiconductor body, said second gate structure comprising a second gate dielectric layer comprising a different gate dielectric material and having a different charge content than said first gate dielectric layer such that said second gate structure has a second effective work-function different from said first effective-work function and said first field effect transistor and said second field effect transistor have different threshold voltages.