Plated material, method of producing same, and electrical/electronic part using same

摘要

To provide a plated material having both high heat-resistance and good insertability/extractability. The plated material comprises an undercoating of any one of metals belonging to group 4, group 5, group 6, group 7, group 8, group 9 or group 10 of the periodic table or an alloy containing any one of those metals as a main component, an intermediate coating of Cu or a Cu alloy, and a top-coating of Sn or an Sn alloy, the undercoating, the intermediate coating and the top-coating being formed on a surface of an electrically conductive base in this order, and the thickness of the top-coating is 1.9 times or more the thickness of the intermediate coating.