Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – With mechanical abrasion or grinding
Reexamination Certificate
2004-11-01
2008-09-09
Wilkins, III, Harry D (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
With mechanical abrasion or grinding
C205S663000, C205S668000, C205S093000
Reexamination Certificate
active
07422677
ABSTRACT:
This invention provides a membrane-mediated electropolishing process for polishing and/or planarizing metal work pieces. The work piece is wetted with a low-conductivity fluid. The wetted work piece is contacted with a first side of a charge-selective ion-conducting membrane, wherein the second side contacts a conductive electrolyte solution in electrical contact with a cathode. Current flow between the cathode and the work piece electropolishes metal from the work piece. This process can be used for both pure metals and alloys, and provides several significant advantages over conventional electropolishing processes. This invention also provides an apparatus useful in the membrane-mediated electropolishing process.
REFERENCES:
patent: 4176215 (1979-11-01), Molnar et al.
patent: 4545889 (1985-10-01), Franx
patent: 4909912 (1990-03-01), Oda et al.
patent: 4983264 (1991-01-01), Miyake et al.
patent: 6375823 (2002-04-01), Matsuda et al.
patent: 6527920 (2003-03-01), Mayer et al.
patent: 6646083 (2003-11-01), Hirano et al.
patent: 6653226 (2003-11-01), Reid
patent: 1 293 481 (2003-03-01), None
patent: 516898 (1940-01-01), None
patent: WO 03/030223 (2003-04-01), None
patent: WO 03/046263 (2003-06-01), None
patent: WO 03/064734 (2003-08-01), None
patent: WO 03/092891 (2003-11-01), None
patent: WO 03/098676 (2003-11-01), None
D. E. Ward, “D. Electropolishing”, Electroplating Engineering Handbook, 4thEdition, 1984, pp. 100-120.
S. H. Glarum et al., “The Anodic Dissolution of Copper Into Phosphoric Acid”, J. Electrochem. Soc., 1985, vol. 132:2872-2878.
C. Wagner, “Contribution to the Theory of Electropolishing”, J. Electrochem. Soc., 1954, vol. 101:225-228.
Legras et al., “Sorption and Diffusion Behaviors of Water in Nafion 117 Membranes With Different Counter Ions”, Desalination, 2002, vol. 147:351-357.
Jackson, Jr. Charles E.
Mazur Stephen
E.I. du Pont de Nemours and Company
Wilkins, III Harry D
LandOfFree
Membrane-mediated electropolishing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Membrane-mediated electropolishing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane-mediated electropolishing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3991520