Method of manufacturing porous anodized alumina film
First Claim
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1. A method of forming a porous anodized alumina film, characterized by comprising the steps of:
- forming a plurality of recesses in a surface of a smooth aluminum plate in a predetermined array at a predetermined interval; and
anodizing the aluminum plate to form a porous anodized alumina film having pores having a predetermined shape and the same interval and array as those of the plurality of recesses.
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Abstract
A plurality of recesses having the same interval and array as those of pores of an alumina film, which are to be formed in anodizing, are formed on a smooth surface of an aluminum plate in advance, and then, the aluminum plate is anodized. With this process, the roundness of the pores of the porous anodized alumina film and the uniformity of pore size are improved, and the pores are regularly arrayed at a predetermined interval. The recesses are formed by pressing a substrate having a plurality of projections on its surface against the aluminum plate surface to be anodized.
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Citations
12 Claims
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1. A method of forming a porous anodized alumina film, characterized by comprising the steps of:
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forming a plurality of recesses in a surface of a smooth aluminum plate in a predetermined array at a predetermined interval; and anodizing the aluminum plate to form a porous anodized alumina film having pores having a predetermined shape and the same interval and array as those of the plurality of recesses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of forming a porous anodized alumina film, characterized by comprising the steps of:
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forming an aluminum film on a substrate having a smooth surface; forming a plurality of recesses on a surface of the aluminum film to have a predetermined interval and array; and anodizing the surface of the aluminum film to form a porous anodized alumina film having pores having a predetermined shape and the same interval and array as those of the plurality of recesses. - View Dependent Claims (12)
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Specification