Patent ID: 8394508

Claim:
A plated article comprising an alloy thin film formed on a substrate, the alloy thin film containing a catalytically active metal (A) for electroless plating and a metal (B) capable of undergoing displacement plating with a metal ion contained in an electroless plating solution, and a metal thin film formed on the alloy thin film by electroless displacement and reduction plating, wherein the alloy thin film has a composition comprising 5 at. % to 40 at. % of the catalytically active metal (A), the metal thin film has a thickness of no greater than 10 nm and a resistivity of no greater than 10 μΩ·cm, an oxygen concentration at an interface between the alloy thin film and the metal thin film is no greater than 1 at. % as analyzed by Auger electron spectroscopy and the catalytically active metal (A) is at least one metal selected from the group consisting of Pd, Pt, Ag and Au, the metal (B) capable of undergoing displacement plating is at least one of W and Nb, the metal thin film is Cu and the catalytically active metal (A) is present in the alloy thin film in an amount of from 10-30 at. %.