Method of nodularizing a metal surface

C - Chemistry – Metallurgy – 25 – D

Patent

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204/15, 204/36

C25D 3/38 (2006.01) C25D 5/16 (2006.01) C25D 7/06 (2006.01) H05K 3/38 (2006.01) H05K 3/02 (2006.01)

Patent

CA 1044636

Abstract of the Disclosure A method of nodularizing a metal surface, e.g., a copper, copper alloy or nickel surface, by electroplating the surface with copper from a copper sulfate plating solution containing nitrate ions. The nodules formed are generally spherical and are firmly attached to the underlying metal surface and assist in mechanically locking it to another mem- ber, for example, the resinous substrate used in forming a printed circuit board.

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