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US 4,376,018 AGranted
Electrodeposition of nickel
AssigneeBell Telephone Laboratories, Incorporated
InventorPaul A. Kohl
Life of this patent
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Abstract
Nickel is electroplated from a bath comprising such additives as phenolphthalein, lactones, lactams, cyclic sulfate esters, cyclic imides and cyclic oxazolinones. These additives permit high plating rates, smooth bright finishes, freedom from dendritic growth and constant plating thicknesses over wide areas.
Claims6
A process for electroplating a metallic substance consisting essentially of nickel comprising the step of passing current through an anode, an aqueous plating solution and a cathode CHARACTERIZED IN THAT the plating bath comprises a heterocyclic additive consisting essentially of phenolphthalein.
Dependencies are inferred from the claim text.