Chemistry: electrical and wave energy – Processes and products
Patent
1982-03-04
1983-02-15
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 38B, C25D 106
Patent
active
043740022
ABSTRACT:
The invention is a novel method for producing mirror surfaces which are extremely smooth and which have high optical reflectivity. The method includes electrolessly depositing an amorphous layer of nickel on an article and then diamond-machining the resulting nickel surface to increase its smoothness and reflectivity. The machined nickel surface then is passivated with respect to the formation of bonds with electrodeposited nickel. Nickel then is electrodeposited on the passivated surface to form a layer of electroplated nickel whose inside surface is a replica of the passivated surface. The electroplated nickel layer then is separated from the passivated surface. The mandrel then may be re-passivated and provided with a layer of electrodeposited nickel, which is then recovered from the mandrel providing a second replica. The mandrel can be so re-used to provide many such replicas. As compared with producing each mirror-finished article by plating and diamond-machining, the new method is faster and less expensive.
REFERENCES:
patent: 3428533 (1969-02-01), Pichel
patent: 3647642 (1972-03-01), Olson
patent: 3666529 (1972-05-01), Wright et al.
Jostan et al., Electroforming of Extremely Smooth Metallic Substrates for Application in Microelectronics, Plating, pp. 399-404, 4/69.
A. K. Graham, Electroplating Engineering Handbook (2nd Edition), pp. 464-479, Reinhold Publishing Corp., New York.
Metal Finishing Guidebook and Directory, 1980, pp. 480-488, Metals and Plastics Publications, Inc., Hackensack, New Jersey.
Arnold Jones B.
Steger Philip J.
Wright Ralph R.
Besha Richard G.
Hamel Stephen D.
Kaplan G. L.
Lewis Fred O.
Nguyen N.
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