| abstract |
The connection reliability of connecting terminals with displacement gold plating films is improved by connecting terminals comprising a conductive layer, an electroless nickel plating film, a first palladium plating film which is a displacement or electroless palladium plating film with a purity of 99% by mass or greater, a second palladium plating film which is an electroless palladium plating film with a purity of at least 90% by mass and less than 99% by mass, and a displacement gold plating film, wherein the electroless nickel plating film, the first palladium plating film, the second palladium plating film and the displacement gold plating film are laminated in that order on one side of the conductive layer, and the displacement gold plating film is situated on the uppermost surface layer on the opposite side from the conductive layer. |