Patent ID: 6153515
Filing Date: 2000-11-28
Classification: H01L

Abstract:
A method of forming a barrier metal layer which prevents film peeling in the contact region between a wiring and an electrode of a circuit device formed on a semiconductor substrate, said method comprising:forming a Ti film over the entire surface of a semiconductor substrate having an insulating film, said insulating film having a contact hole through which part of the semiconductor substrate is exposed;introducing a nitride-containing gas and performing a nitriding treatment on the Ti film, thereby terminating the surface of the Ti film with nitride;reacting un-nitrided Ti that remains on the surface of said treated film with an oxygen-containing gas, thereby causing said un-nitrided Ti to unite with oxygen forming TiO.sub.2 ; andforming a barrier metal layer on the surface of the Ti film terminated with nitride and containing TiO.sub.2.