Patent ID: 8163400

Claim:
A plated article which has an alloy thin film formed on a substrate and 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, the alloy thin film is a single layer having both a barrier function and catalytic ability, and a metal thin film formed on the alloy thin film by electroless displacement and reduction plating, wherein the alloy thin film containing the catalytically active metal (A) and the metal (B) capable of displacement plating has a composition comprising 5at% to 40at% of the catalytically active metal (A), the thickness of the alloy thin film ranges from 3 to 20 nm, the catalytically active metal (A) is at least one metal selected from among rhodium, ruthenium and iridium, and the metal (B) capable of displacement plating is at least one metal selected from among iron, nickel, cobalt, tungsten, niobium, tin, magnesium, aluminum, zinc and lead, and the metal thin film formed by electroless displacement and reduction plating is a metal thin film having a thickness no greater than 10 nm and a resistivity no greater than 10 μΩ·cm.