Patent ID: 7179700

Claim:
A method, comprising: providing a substrate having a semiconductor region; forming a first gate, first source/drain contact regions adjacent to the first gate that are in the semiconductor region and of a first conductivity type, a second gate, and second source/drain contact regions adjacent to the second gate that are in the semiconductor region and of a second conductivity type, wherein the second source/drain contact regions are characterized by having a first work function; forming a conductive layer over the first gate, the second gate, the first source/drain contact regions, and the second source/drain contact regions, forming a first mask that covers the first source/drain contact regions and is open over the second source drain contact regions; after forming the conductive layer over the first gate, performing an implant of a first material directed toward the substrate while the mask covers the first source/drain contact regions and is open over the second source drain contact region so that the implant is into a portion of the conductive layer that is over the second source/drain contact regions for causing a work function change toward the first work function, wherein the material is a not a semiconductor dopant; and removing the mask.