Patent ID: 7598171
Filing Date: 2009-10-06
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: introducing first impurities of a first conductivity type into a main surface of a semiconductor substrate to form a first impurity region; introducing second impurities of a second conductivity type into the main surface of said semiconductor substrate to form a second impurity region, the second conductivity type being different from the first conductivity type; forming a first nickel silicide film on said first impurity region and forming a second nickel silicide film on said second impurity region; forming an insulating film on each of said first and second nickel silicide films; forming an interlayer insulating film on said insulating film; forming contact holes over each of the first and second nickel silicide films to etch the insulating film and the interlayer insulating film; removing an oxide film formed under said contact holes and formed on each of said first and second nickel silicide films by using a mixed gas having an NF forming a first conducting film on said first nickel silicide film and forming a second conducting film on said second nickel silicide film, with said oxide film removed.