Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1993-03-25
1994-03-29
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204402, 204412, 204434, G01N 2726
Patent
active
052981320
ABSTRACT:
A method for monitoring the status of a plating bath purification treatment cycle. The method involves applying a swept dc measurement signal to a pretreated electrode which is in contact with the plating solution, and monitoring the resultant response current signal. The electrode potential corresponding to the peak current density in the cathodic sweep of the response current signal provides an accurate indication of the status of the purification treatment cycle. The method tracks the progress of the purification process thereby ensuring the optimal termination points for the treatment process. The method can be used in conjunction with voltammetric plating bath analysis methods and equipment, as part of an overall plating bath monitoring and control system.
REFERENCES:
patent: 4631116 (1986-12-01), Ludwig
Eliash Bruce M.
Ludwig Frank A.
Phan Nguyet H.
Reddy Vilambi N. R. K.
Bell Bruce F.
Denson-Low W. K.
Hughes Aircraft Company
Lachman M. E.
Niebling John
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