Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Involving measuring – analyzing – or testing
Patent
1999-02-17
2000-10-31
Gorgos, Kathryn
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Involving measuring, analyzing, or testing
205 96, 205134, 205137, 204212, 204DIG7, C25D 2112
Patent
active
061397113
ABSTRACT:
An apparatus for measuring the throwing power of electroplating solutions which provides a nearly linear current density distribution across the panel. The apparatus includes a cylindrical body adapted for rotation about a longitudinal axis thereof, a cylindrical cathode arranged coaxially about a central portion of the cylindrical body, an anode coaxially positioned at a lower end portion of the cylindrical body, a conical shield coaxially arranged around an upper end portion of the cathode; and an annular disk-baffle coaxially arranged around a lower end portion of the cathode. The conical shield and the disk-baffle provide a substantially linear current distribution over the cathode. In another aspect, the invention includes a method for measuring the throwing power of an electrolyte comprising using the instrument of the invention to analyze the variation in the appearance of an electrodeposit over a wide range of current densities along test panel by providing a nearly linear current density distribution across the panel in order to determine optimal electroplating conditions.
REFERENCES:
patent: 5413692 (1995-05-01), Abys et al.
Abys Joseph Anthony
Holmbom Lars Goran
Maisano Joseph John
Gorgos Kathryn
Lucent Technologies - Inc.
Parsons Thomas H.
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