Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Kanagawa Academy of Science and Technology

Kanagawa Institute of Industrial Science and Technology

Jitsuo Hirohata

Hideki Masuda

Eiko Okamoto

Hiroshi Onomoto

Masashi Ikawa

Yuji Matsubara

Takashi Yanagishita

The present invention relates to a method of manufacturing a mold having an oxide film with a plurality of pores formed on a surface of an aluminum substrate, the method including (a) a process of applying a voltage to a machined aluminum substrate and anodizing a surface of the aluminum substrate to form an oxide film; and (b) a process of removing at least a part of the oxide film formed in the process (a), wherein a voltage (V[V]) immediately before the process (a) is terminated and a time (t[sec]) required to reach the voltage (V[V]) after starting the application of voltage satisfy the following Equation (i) in the process (a).0.010&#x3c;&#x2003;&#x2003;(i)

Method of manufacturing mold, and molded article having fine relief structure on surface and method of manufacturing the same

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

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Otake, Japan

Jitsuo Hirohata