Patent ID: 7964500

Claim:
A method of manufacturing a semiconductor integrated circuit device comprising the steps of: (a) forming a pre-metal insulating film over a device surface of a semiconductor wafer via an etch stop insulating film; (b) opening a contact hole passing through the pre-metal insulating film and the etch stop insulating film; (c) performing a heat treatment for the upper surface of a nickel-based metal silicide film at the bottom of the contact hole in a first non-plasma reducing vapor phase atmosphere containing a gas having a nitrogen-hydrogen bond as one of main gas components; (d) after the step (c), forming a titanium-based barrier metal film at the upper surface of the pre-metal insulating film and the inner surface of the contact hole; (e) forming a plug metal layer over the upper surface of the pre-metal insulating film and the titanium-based barrier metal film of the inner surface of the contact hole; and (f) removing the titanium-based barrier metal film and the plug metal layer outside the contact hole.