Device and method for electroplating a workpiece having axial sy

Details Device and method for electroplating a workpiece having axial sy Device and method for electroplating a workpiece having axial sy

1987-07-06

1988-01-19

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

204212, 204238, 204240, 204241, 204224R, 204DIG7, C25D 704, C25D 1700, C25D 1712, C25D 2102

Patent

active

047203307

ABSTRACT:
The invention is a device and method for electroplating a metal workpiece having axial symmetry, such as a circular workpiece. In this invention the workpiece, which is the cathode, is rotated inside an anode structure submerged in the plating solution. Part of the rotating cathode continuously moves through a region of intense current fluxes created by passing DC current between the anode and cathode. The rotating cathode stirs the plating solution, which speeds up the plating rate. At the same time, with only part of the cathode passing continuously through the intense current flux region, the deposition process is periodically slowed down and intensified.

REFERENCES:
patent: 2086841 (1937-07-01), Bagley et al.
patent: 2363973 (1944-11-01), Kennedy et al.
patent: 3583897 (1971-06-01), Fulweiler
patent: 3664944 (1972-05-01), Buckley
patent: 3915832 (1975-10-01), Rackus et al.
patent: 4659447 (1987-04-01), Anzola et al.

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