Patent ID: 7727832
Filing Date: 2010-06-01
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: forming a p-type semiconductor region and an n-type semiconductor region insulated from each other in a substrate; forming a first and second gate insulating films on the p-type and n-type semiconductor regions, respectively; forming a first and second gate electrodes on the first and second gate insulating films respectively, the first gate electrode including a first nickel silicide having a composition of Ni/Si<31/12, and the second gate electrode including a second nickel silicide having a composition of Ni/Si≧31/12; forming an aluminum layer on the first and second gate electrodes; and diffusing the aluminum through the first gate electrode and diffusing the aluminum in the second gate electrode by performing heat treatment, to segregate the aluminum at an interface between the first gate electrode and the first gate insulating film.