Selective stripping apparatus
US5002649A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Jun 7, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus for electroplating a selected surface of a workpiece, or electrolytically or chemically stripping a plating therefrom, comprises an electrode or center constrictor member having an active surface with a selected shape to combine with the selected surface of the workpiece to define an elongated gap of at least about 0.050 inches therebetween, means for supporting this constrictor member in a fixed position to define the elongated gap; solution circulating means for forcing a stripping solution through the gap in a generally closed path at a velocity to exchange stripping solution in the gap at a rate of at least 25 times per minute. When used for either electroplating or electrolytically stripping, the apparatus is provided with means for applying current flow between the selected workpiece surface and the active surface of the electrode through the gap at a current density of at least 2.0 amperes/in.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.