Mitsubishi Rayon Company, Limited

Kanagawa Academy of Science and Technology

Nippon Light Metal Company, Ltd.

Takashi Yanagishita

Eiko Okamoto

Hideki Masuda

Satoshi Sakuma

Yoshihiro Uozu

Katsuhiro Kojima

Hiroshi Onomoto

Masashi Ikawa

Hiroaki Kita

Kota Shirai

Yuji Matsubara

Hisakazu Ito

Jitsuo Hirohata

Masayuki Saeki

Seiji Tone

This method for producing anodic porous alumina such that an oxide coating film having a plurality of minute pores is formed at the surface of an aluminum substrate is characterized by containing: a step (a) for immersing the aluminum substrate in an electrolytic liquid resulting from mixing a plurality of acids; a step (b) for imposing a voltage on the aluminum substrate immersed in the electrolytic liquid; a step (c) for holding the aluminum substrate in the state of being immersed in the electrolytic liquid essentially without imposing a voltage on the aluminum substrate; and a step (d) for alternately repeating step (b) and step (c). By means of the present invention, it is possible using a simple device and with few steps to provide a method that easily produces anodic porous alumina such that an oxide coating film having a plurality of minute pores is formed at the surface of an aluminum substrate.

Method for producing anodic porous alumina, method for producing molded article having microscopic pattern on surface, and molded article having microscopic pattern on surface

A mold comprising alumina having a microscopic pattern, in which distances between adjacent recesses or salients therein are not longer than wavelength of visible light, formed by anodic oxidation on a surface of an aluminum pre-mold without a rolling mark, wherein height or depth difference at a crystal grain boundary is 300 nm or less.

Mold, process for producing mold, and process for producing sheet

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Tokyo, Japan

Takashi Yanagishita