Patent ID: 8343837

Claim:
A method, comprising: forming a first gate electrode structure of a first transistor above a semiconductor layer, said first gate electrode structure comprising a first placeholder electrode material formed above a high-k gate insulation layer; forming a second gate electrode structure of a second transistor above the semiconductor layer, said second gate electrode structure comprising a second placeholder electrode material formed above a high-k insulation layer, wherein the second transistor has a different conductivity type as compared to said first transistor; forming drain and source regions of said first and second transistors; removing said first placeholder electrode material concurrently with removing said second placeholder electrode material; forming a metal layer above said first and second gate electrode structures and selectivity removing the metal layer from above said first gate electrode structure so as to adjust a work function of said second gate electrode structure; forming a lanthanum-containing material layer above said first and second transistors after forming and selectively removing said metal layer; and forming a metal-containing electrode material on said lanthanum-containing material layer.