Patent ID: 8105937
Filing Date: 2012-01-31
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure comprising: forming a patterned dielectric layer on a substrate; forming a metallic nitride liner directly on patterned surfaces of said patterned dielectric layer; forming a metal liner comprising an elemental metal or an intermetallic alloy directly on said metallic nitride liner; forming a conformal adhesion promoter liner comprising copper nitride directly on said metal liner by chemical vapor deposition (CVD) or atomic layer deposition (ALD); converting an exposed outer portion of said conformal adhesion promoter liner to a conformal Cu-rich conductive layer including copper and nitrogen by an anneal; and forming a Cu seed layer by physical vapor deposition (PVD) directly on said conformal Cu-rich conductive layer, wherein said Cu-rich conductive layer is spaced from said metal liner by a remaining portion of said conformal adhesion promoter liner comprising copper nitride during formation of said Cu seed layer.