Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1984-05-18
1986-01-14
Kaplan, G. L.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
200262, 204 49, C25D 312
Patent
active
045645655
ABSTRACT:
An electrical contact surface, suitable for use in producing electrical connectors, and having low surface contact resistance, is produced by the electrolytic deposition of nickel in crystalline form on a substrate. A plating bath is prepared containing nickel anions selected from the group consisting essentially of TiF.sub.6 --, ZrF.sub.6 --, HfF.sub.6 --, and TaF.sub.7 --. The nickel is preferably in the form of nickel chloride in an amount between about 0.1-2 molar, while the anion additives are in an amount between about one gram per liter and the solubility limit of the particular anion. The bath temperature, pH, and current density conditions are controlled to effect the deposition, and the electrical contact surface produced has a matte finish with nodules densely arranged on the surface. The contact resistance is less than that of a standard copper surface coated with 500 microinches of gold.
REFERENCES:
W. A. Wesley et al., The Electrochemical Soc., Preprint 75-16, pp. 179-201, (1939).
J. K. Dennis et al., "Nickel and Chromium Plating", pp. 151-153 & 319, (1972).
Burlington Industries Inc.
Kaplan G. L.
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