Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1986-11-10
1988-08-09
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204DIG13, 204130, 204151, 106 123, 106 126, 427345, 427437, B01D 1302, C23C 1816
Patent
active
047626011
ABSTRACT:
An electroless copper plating bath is improved so as to facilitate its regeneration in an electrodialysis cell. The bath includes elevated amounts of an added salt, preferably as Na salt. The elevated sodium ion level serves as additional counter-cation to hydroxyl ion which is produced at the cathode of the electrodialysis cell. The excess anion from the added salt increases the rate of out-migration of by-products, such as formate ions and sulfate ions, relative to hydroxyl ions through an anion permselective membrane.
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G. Krulik et al., Galvanotechnik n. 11, V. 76 (1985) pp. 1806-1811.
H. Homma et al. Japan Metal Finishing Technology 34 Jan. 1984 pp. 47-52.
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F. A. Domino, Plating of Plastics, Recent Developments pp. 282-292 Noyes Data Corp., Park Ridge, N.J. 1979.
Davis Stephen C.
Davison John B.
Krulik Gerald
Morton Thiokol Inc.
Nacker Wayne E.
Niebling John F.
Starsiak Jr. John S.
White Gerald K.
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