Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1990-07-09
1993-07-20
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204DIG7, 204212, 204400, G01N 2742
Patent
active
052289761
ABSTRACT:
The invention provides, in electroplating quality control methods for manufacturing, better similarity and relevance between a Hull Cell quality control test and a particular plating operation. The invention is a simple and yet functional instrument which can be used to identify the performance of the plating bath prior to manufacturing operation under similar hydrodynamic conditions. The instrument is a rotating cylinder with a flexible Cu test panel attached to its surface. Like a Hull Cell, a range of current density can be simultaneously applied. Unlike a Hull Cell, the rotating speed of the cylinder and hence the solution agitation is practically unlimited. The operator can identify the operating window for the particular process and apply them to the production line. The instrument has also demonstrated usefulness in developing proprietary electroplating chemistries.
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Abys Joseph A.
Kadija Igor V.
Alber Oleg E.
AT&T Bell Laboratories
Tung T.
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