Method for producing anodized film

摘要

A method for manufacturing an anodized film according to an embodiment of the present invention includes the steps of: (a) providing a multilayer structure that includes a base, a sacrificial layer which is provided on the base and which contains aluminum, and an aluminum layer which is provided on a surface of the sacrificial layer; (b) partially anodizing the aluminum layer to form a porous alumina layer which has a plurality of minute recessed portions; and (c) after step (b), separating the porous alumina layer from the multilayer structure. According to an embodiment of the present invention, a self-supporting anodized film which includes a porous alumina layer can be manufactured more conveniently as compared with the conventional methods.

主权项

1. A method for manufacturing an anodized film, comprising the steps of:
(a) providing a multilayer structure that includes an inorganic or plastic base, a sacrificial layer which is provided on the base and which contains aluminum, and an aluminum layer which is provided on a surface of the sacrificial layer; (b) partially anodizing the aluminum layer to form a porous alumina layer which has a plurality of minute recessed portions; and (d) after step (b), separating the porous alumina layer from the multilayer structure, wherein the anodized film is a self-supporting film which includes the porous alumina layer, and wherein the sacrificial layer contains aluminum and either of oxygen or nitrogen, and the sacrificial layer has a profile such that a content of the aluminum is higher in a portion which is closer to the aluminum layer than in another portion which is closer to the base.