Method of and device for compensating variations of branch curre

Details Method of and device for compensating variations of branch curre Method of and device for compensating variations of branch curre

1988-09-07

1991-06-18

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

204228, C25D 2112, C25D 518

Patent

active

050247328

ABSTRACT:
A method for compensating variations of branch currents in an electrolytic bath and hence for improving the uniformity of metal layers deposited on articles, provides a compensating passive resistor having a resistance value exceeding the resistance of respective electroplating branch circuits, in series with each branch circuit. The total electroplating current is adjusted to the nominal branch currents whereby the magnitudes of the latter is determined predominantly by the compensating passive resistors.

REFERENCES:
patent: 3470082 (1969-09-01), Raymond et al.
patent: 3592754 (1971-07-01), Aihara
patent: 4461690 (1984-07-01), Rolff et al.
patent: 4490230 (1984-12-01), Fletcher
patent: 4786384 (1988-12-01), Gerhardt et al.

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