The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2017
Filed:
Mar. 22, 2011
Kiyoshi Minoura, Osaka, JP;
Akinobu Isurugi, Osaka, JP;
Ichirou Ihara, Osaka, JP;
Hidekazu Hayashi, Osaka, JP;
Kenichiro Nakamatsu, Osaka, JP;
Kiyoshi Minoura, Osaka, JP;
Akinobu Isurugi, Osaka, JP;
Ichirou Ihara, Osaka, JP;
Hidekazu Hayashi, Osaka, JP;
Kenichiro Nakamatsu, Osaka, JP;
SHARP KABUSHIKI KAISHA, Osaka, JP;
Abstract
A method is provided for manufacturing a mold that has a porous alumina layer over its surface, which is capable of preventing formation of pits (recesses). A moth-eye mold manufacturing method of an embodiment of the present invention is a method for manufacturing a mold which has a porous alumina layer over its surface, including the steps of: providing a mold base which includes an aluminum base and an aluminum film deposited on a surface of the aluminum base, the aluminum film having a purity of not less than 99.99 mass %; anodizing a surface of the aluminum film to form a porous alumina layer which has a plurality of minute recessed portions; and bringing the porous alumina layer into contact with an etching solution to enlarge the plurality of minute recessed portions of the porous alumina layer.