Porous aluminum oxide film and method of forming of the same

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428134, B32B 310

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active

050771140

ABSTRACT:
A porous aluminum oxide film has a plurality of pores passing through the film. Each pore has a pair of larger diameter pores and a smaller diameter pore. The smaller diameter pore is disposed in a central portion with respect to the thickness of the film, and the larger diameter pores are disposed upon both ends of the smaller diameter pore.

REFERENCES:
patent: 3671410 (1972-06-01), Stahr
patent: 3850762 (1974-11-01), Smith

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