ECL uses a unique hot bonding process to produce bimetal or trimetal overlays from which clad contact buttons are produced. Two common techniques are available at ECL to produce clad button contacts. The clad overlay strip is processed in progressive dies to produce the finished button contact, or contact blanks are subsequently formed to their final sizes in a separate operation. Because ECL utilizes both techniques to produce buttons our customers can be assured of sound advice on the design of this style of contact. Fine silver, silver copper alloys, silver-nickel and the silver metal oxide materials can all be supplied in the clad metal contact form. Button contacts are also produced by the "melt & coin" method. Fine silver and some of the silver alloys can be processed so that they adhere to the contact substrate. Subsequently they are coined to the final dimensions to provide a very simple and economical button contact.