Patent ID: 6339021
Filing Date: 2002-01-15
Classification: H01L

Abstract:
A method of fabricating a nickel silicide film in the manufacture of an integrated circuit comprising:providing a semiconductor substrate having silicon regions to be silicided; depositing a nickel layer overlying said silicon regions to be silicided wherein a native oxide layer forms on said silicon regions underlying said nickel layer; depositing a titanium layer overlying said nickel layer; annealing said substrate whereby titanium atoms from said titanium layer diffuse through said nickel layer and react with said native oxide layer forming a titanium oxide layer whereby said nickel diffuses through said titanium oxide layer into said silicon regions thereby transforming said nickel to nickel silicide where it overlies said silicon regions and wherein said nickel not overlying said silicon regions is unreacted; and removing said unreacted nickel layer to complete formation of said nickel silicide film in the manufacture of said integrated circuit.