Fay, Sharpe, Beall, Fagan, Minnich & McKee
Multilayer plating method and multilayer plated film
 A primary plated film is formed on the surface of underlayer metal. Next, the heating process is performed and diffusion layers of the underlayer metal and primary plated film are formed. A mechanical abrasion is performed to the surface of the primary plated film, thereby exposing the diffusion layers. Thereafter, a secondary plated film is formed on the exposed diffusion layers. With this multilayer plating method, even in the case of the dissimilar metals, a uniform multilayer plated film of a good adhesive property is derived. 
Hitachi, Ltd.
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Y10T H05K H01L H01L Y10T H05K B23K H01L Y10T C23C
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Masao Tetsuya
Sekibata Watanabe