Patent ID: 8304658
Filing Date: 2012-11-06
Classification: C23C,C25D,C25F

Abstract:
1. A process for the preparation of a layer system comprising on a substrate (i) a Ni layer having a thickness ≦3.0 μm, (ii) a Ni—P layer having a thickness ≦1.0 μm, (iii) a Au layer ≦1.0 μm comprising the following steps: (i) electropolishing the surface of said substrate, (ii) plating a Ni layer onto the electropolished surface obtained in step (i) above such that the thickness of said Ni layer is ≦3.0 μm, (iii) plating a Ni—P layer onto the Ni layer obtained in step (ii) above such that the thickness of said Ni—P layer is ≦1.0 μm, (iv) plating an Au layer onto the Ni—P layer obtained in step (iii) above such that the thickness of said Au layer is ≦1.0 μm.