Patent ID: 6727132
Filing Date: 2004-04-27
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device having an NMOS transistor, and a PMOS transistor comprising:forming a gate insulating film on a semiconductor substrate; forming a semiconductor film containing boron on said gate insulating film; forming a mask to cover an area where said PMOS transistor is formed, introducing phosphorus onto a corresponding portion of said semiconductor film to an area where said NMOS transistor is formed, and performing an ion implantation of arsenic or antimony at such an energy as a projection range into the middle of said semiconductor film to an area where said NMOS transistor is formed; removing said mask and forming a metallic nitride film on said semiconductor film; working a stacked film containing said semiconductor film and said metallic nitride film for forming each gate electrode of said NMOS transistor and said PMOS transistor; and performing an annealing in a nitrogen atmosphere or a hydrogen atmosphere with vapor added thereto wherein said boron is segregated on an interface of said metallic nitride film, and said phosphorus is segregated on an interface of said gate insulating film.