Process of electroforming screen material

Details Process of electroforming screen material Process of electroforming screen material

1982-09-30

1984-03-13

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 24, 204DIG9, C25D 108, C25D 700

Patent

active

044365918

ABSTRACT:
A screen skeleton as a cathode is subjected to a pulsed current for depositing metal from an electrolytic bath onto the metal regions of the screen skeleton, said electrolytic bath containing a brightener of the second class. This process involves growth of metal substantially perpendicular to the screen skeleton surfaces thus maintaining the size of the openings of the screen skeleton.
Small pulse current durations are advantageous. Preferably a pulsed current is used comprising pulse current and non-pulse current durations; more preferably the pulse current durations are subdivided into small pulse current and non-current pulse periods.

REFERENCES:
patent: 2226381 (1940-12-01), Norris
patent: 2226384 (1940-12-01), Norris
patent: 2678909 (1954-05-01), Jernstedt
patent: 2706170 (1955-04-01), Marchese
Modern Electroplating, Edited by F. A. Towenheim, Third Edition, 1974, pp. 296-305.
IBM Technical Disclosure Bulletin, vol. 16, No. 3, Aug. 1973, pp. 979, 980.
Metal Finishing, vol. 77, May 1979, pp. 33-38, Tai Ping Sun et al., Plating with pulsed and periodic reverse current.

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