ANODIC OXIDATION POROUS ALUMINA AND METHOD FOR PRODUCING SAME, AND THROUGH-HOLE ALUMINA MEMBRANE AND METHOD FOR PRODUCING SAME

摘要

A method for producing a through-hole alumina membrane, said method being characterized by comprising: forming an anodic oxidation porous alumina film that has a structure wherein two or more alumina layers having different solubilities are layered by the anodic oxidation of aluminum; immersing the anodic oxidation porous alumina film in an etchant to thereby selectively dissolve and remove an alumina layer having a higher solubility; and thus forming a through-hole membrane wherein small holes penetrate through an alumina layer having a lower solubility. According to this method, a desired through-hole alumina membrane can be easily obtained without using cumbersome steps.