High temperature resistant silver coated substrates

Abstract

A thin film of tin is plated directly on nickel coating a metal substrate followed by plating silver directly on the thin film of tin. The silver has good adhesion to the substrate even at high temperatures.

1 - 5 . (canceled) 
     
     
         7 . A method comprising:
 a) providing a containing substrate comprising copper or copper alloy;   b) depositing a nickel layer adjacent the copper or copper alloy of the substrate;   c) depositing a tin layer adjacent the nickel layer; and   d) depositing a silver layer adjacent the tin layer, the silver layer is at least twice the thickness of the tin layer.   
     
     
         8 . The method of  claim 7 , wherein the silver is deposited from a cyanide containing bath.