Chemistry: electrical and wave energy – Processes and products
Patent
1990-04-17
1991-11-05
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
204 383, 204 561, C25D 1134
Patent
active
050629280
ABSTRACT:
A process for producing color change devices incorporating latent indicia and color change devices incorporating latent indicia produced by the process. The process involves anodizing a color generating metal, having limited surface areas thereof covered by a mask, in the presence of a fluoride as an adhesion-reducing agent in order to produce a color-generating laminate incorporating an anodic film having detachable and non-detachable areas. The improvement of the invention involves forming the mask from a masking material which permits anodization of areas of the surface covered by the mask while preventing the adhesion-reducing agent from exerting a substantial adhesion-reducing effect in the areas of the surface covered by the mask. The anodic film having the detachable and non-detachable areas can then be formed by means of a single anodization step carried out in the presence of the adhesion-reducing agent. It is therefore unnecessary to employ two partial anodization steps as in the past, which simplifies the fabrication procedure and makes the procedure less expensive.
REFERENCES:
patent: 841321 (1927-01-01), Howard
patent: 2360325 (1944-12-01), Higbee
patent: 4082573 (1978-04-01), Williams
patent: 4082873 (1978-04-01), Williams
patent: 4098940 (1978-07-01), Groh et al.
patent: 4322466 (1982-03-01), Tomlinsen
patent: 4424911 (1984-01-01), Resnick
patent: 4480760 (1984-11-01), Schonberger
patent: 4489841 (1984-12-01), Thompson
patent: 4502605 (1985-03-01), Wleszczyan
patent: 4511052 (1985-04-01), Howard
patent: 4516679 (1985-05-01), Simpson et al.
patent: 4519515 (1985-05-01), Schonberger
patent: 4557505 (1985-12-01), Schaefer et al.
patent: 4591062 (1986-05-01), Sandhaus
patent: 4662653 (1987-05-01), Greenaway
patent: 4705300 (1987-11-01), Benning et al.
patent: 4721217 (1988-11-01), Phillips et al.
patent: 4837061 (1989-06-01), Smits et al.
L. Young, 1957, Transactions Faraday Soc. #58, p. 841.
W. E. Hillig et al., in D. A. Virmilysa, 1957, J. Electric Chemical Soc. #104, p. 485.
R. E. Powel et al., 1964, J. Applied Physics #35, p. 435.
Al Aladjem et al., 1060 J. Vacuum Science and Technology #6 p. 635.
The Optical Prop. of Thin Oxide Films on Ti, Charlesby et al., Proc. Royal Soc. 227 (1955) pp. 434-443.
Anodizing Reactive Metals, Seely, Metal Finishing 8/1988.
R. E. Powel et al., 1972, J. Electrochemical Soc. #119, p. 25.
B. Maurel et al., 1972, J. Electrochemical Soc. #119, p. 1715.
The Optical Properties of Thin Oxide Films on Tantalum-Charlesby et al.,-Proc. Royal Society A 227 (1955) 434,443.
Anodizing the Reactive Metals-Seeley-Metal Finishing Aug. 1986.
Metallurgy of the Rarer Metals-6 Tantalum, Niobium G. L. Miller-Butterworth Scientific Publications London 1959.
The Coloration of Refractory Metals-James B. Ward-American Metal Smith.
L. Young, 1957, Transactions Faraday Society 58, 841.
W. E. Hillig Cited in D. A. Vermilyea, 1957, J. Electrochemical Society 104, 485.
R. E. Pawel and T. S. Lundy, 1964, J. Applied Pysics 35, 435.
A. Aladjem and D. G. Brandon, 1965, J. Vacuum Science and Technology 6, 635.
R. E. Pawel, J. P. Pemsler and C. A. Evans, 1972, J. Electrochemical Society 119, 25.
B. Maurel, D. Dieumegard and G. Amsel, 1972, J. Electrochemical Society 119, 1715.
Alcan International Limited
Leader William T.
Niebling John F.
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