Mold, method of manufacturing the same, article having fine uneven structure on surface, and method of manufacturing the same
AssigneeMitsubishi Rayon Co., Ltd.
InventorsKatsuhiro Kojima, Tadashi Nakamura
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Abstract
A mold in which a fine uneven structure is formed on the surface by anodizing a surface of an aluminum base material having a purity of equal to or more than 99.5% by mass, wherein a 60-degree gloss of the surface on the side where a fine uneven structure is formed is equal to or more than 750%.
Claims1
A mold in which a fine uneven structure is formed on a surface by anodizing a surface of an aluminum base material having a purity of equal to or more than 99.5% by mass, wherein the fine uneven structure is such that a plurality of convex portions are formed on the surface of the mold, the convex portions having shapes in which the cross-sectional areas of the convex portions in a direction perpendicular to the height direction continuously increase from the outermost surface to the depth direction, wherein:
- (1) an average interval between the convex portions is 20 to 400 nm,
- (2) a height of the convex portions is 80 to 500 nm, and
- (3) an aspect ratios of convex portions is 0.5 to 5.0 in terms of a ratio of height of the convex portions to the average interval between the convex portions, and
- wherein a 60-degree gloss of the surface on the side where the fine uneven structure is formed is equal to or more than 750%.
Dependencies are inferred from the claim text.