| 摘要 |
<p>An electromechanical assembly has a compound sequence of different layers on a substrate of copper, a copper alloy, a copper-plated substrate, nickel or nickel alloy. The covering layer is tin or a tin alloy. The substrate and covering layer are separated by a barrier layer of Fe, Co, Nb, Mo or Ta, an intermediate layer and a reaction layer. The intermediate layer is an element from the Cu or Ni group. The reaction layer between the covering layer and the intermediate layer is Ag or an Ag-alloy, or Pt and Pg and its alloys. Also claimed is a commensurate manufacturing process and subsequent heat treatment.</p> |
