Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Local application of electrolyte
Patent
1997-06-30
1999-02-02
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Local application of electrolyte
205686, 205672, 204212, 204224M, C25F 302, C25F 700
Patent
active
058659846
ABSTRACT:
Disclosed is an electrochemical etching apparatus including a fixture for holding a workpiece; a nozzle, positioned opposite the fixture and facing the workpiece, for impinging an etchant onto the workpiece; and an electrode for applying a voltage between the electrode and the workpiece; wherein, in operation, one of the fixture and nozzle are rotated and the nozzle is moved radially outwardly so that the workpiece is spirally etched. Also disclosed is a method of spirally etching a workpiece.
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Corbin, Jr. William E.
Datta Madhav
Dinan Thomas E.
Kern Frederick W.
Blecker Ira D.
International Business Machines - Corporation
Valentine Donald R.
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