Semiconductor device and method for fabricating the same

摘要

A semiconductor device includes: a first element region and a second element region formed on a substrate to be adjacent to each other with an isolation region interposed therebetween; a first gate insulating film formed on the first element region; a second gate insulating film formed on the second element region; and a gate electrode continuously formed on the first gate insulating film, the isolation region and the second gate insulating film. The gate electrode includes a first silicided region formed to come into contact with the first gate insulating film, a second silicided region which is formed to come into contact with the second gate insulating film and is of a different composition from the first silicided region, and a conductive anti-diffusion region composed of a non-silicided region formed in a part of the gate electrode located on the isolation region and between the first element region and the second element region.