Patent ID: 8021944

Claim:
A method comprising: providing a semiconductor substrate having a silicide forming region and a non-silicide forming region; and then forming a photoresist film over the silicide forming region and the non-silicide forming region; and then forming a photoresist pattern by patterning the photoresist film over the non-silicide forming region and exposing the silicide forming region, wherein a bottom portion of the photoresist pattern has an overhang structure; and then forming a metal film over the photoresist pattern and the semiconductor substrate in the silicide forming region; and then removing the photoresist pattern and the metal film formed over the photoresist pattern in the non-silicide forming region; and then forming a silicide metal film by performing a first annealing process on the metal film formed over the semiconductor substrate, wherein forming the photoresist pattern comprises: exposing the non-silicide forming region over the photoresist film; and then forming the photoresist pattern such that the critical dimension (CD) at the upper portion thereof is greater than the CD at the bottom portion thereof by developing the photoresist film.