Bilayer oxide film and process for producing same

Details Bilayer oxide film and process for producing same Bilayer oxide film and process for producing same

1990-02-08

1993-01-12

Niebling, John

Stock material or miscellaneous articles

Composite

Of inorganic material

156150, 156151, 156230, 156234, 156238, 156239, 205138, 205139, 205171, 205173, 205189, 205190, 205202, 205229, 205819, 428699, 428701, C25D 1104, C25D 1126, B32B 900

Patent

active

051789671

ABSTRACT:
A bilayer oxide film which comprises a preferably porous layer containing aluminum oxide and a non-porous layer comprising an oxide of a valve metal, e.g. tantalum. The layers are integral. The film is produced by forming a coating of aluminium or an anodizable aluminum alloy on a valve metal (or alloy), anodizing the resulting structure in an electrolyte (preferably one capable of converting the aluminum (or alloy) to a porous oxide film) in the presence of an adhesion-reducing agent (e.g. fluoride ions) that makes the resulting anodized bilayer film easily detachable from the remaining valve metal. The bilayer film is then detached from the valve metal, e.g. by adhering a flexible plastic film to the bilayer and using the film to peel off the bilayer from the valve metal. The resulting bilayer can be used for a variety of purposes, e.g. as a vapor or oxygen barrier useful for packaging, or as a coating containing magnetic particles used to make a magnetic recording medium.

REFERENCES:
patent: Re29739 (1978-08-01), Kessler
patent: 3953625 (1976-04-01), Quaintance et al.
patent: 4190315 (1980-02-01), Brettle et al.
patent: 4430387 (1984-02-01), Nakagawa et al.
patent: 4631112 (1986-12-01), Usui et al.
patent: 4714528 (1987-12-01), Takeuchi et al.
patent: 4717457 (1988-01-01), van der Werf et al.
patent: 4921823 (1990-05-01), Furneaux et al.
W. L. Baun, J. of Materials Science, 15 (1980), pp. 2749-2753.
L. Young, Anodic Oxide Films, Transactions Faraday Society, 58, 1957, pp. 841-847.
R. E. Pawel et al., A Submicron Sectioning Technique . . . , J. Applied Physics, vol. 35, No. 2, Feb. 1964, pp. 435-438.
R. E. Pawel et al., Impurity Distributions in Anodic Films on Tantalum, J. Electrochem. Soc., vol. 119, No. 1, Jan. 1972, pp. 24-29.
Y. Hirayama et al., "Porous Anodic Oxide Films for Perpendicular Magnetic Media", Extended Abstracts, vol. 86-1, No. 1, May 1986, p. 65, Abstract No. 50.

Affiliated with

Also associated with

Rating

Bilayer oxide film and process for producing same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bilayer oxide film and process for producing same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bilayer oxide film and process for producing same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1219167