Mold and process for production of mold

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United States of America Patent

PATENT NO 9405043
APP PUB NO 20130094089A1
SERIAL NO

13643632

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Abstract

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A mold manufacturing method of an embodiment of the present invention includes the steps of: (a) providing a mold base; (b) partially anodizing the aluminum layer to form a porous alumina layer, the porous alumina layer having a porous layer which defines a plurality of minute recessed portions and a barrier layer which is provided at a bottom of each of the plurality of minute recessed portions; and (c) after step (b), performing etching, thereby enlarging the plurality of minute recessed portions of the porous alumina layer, wherein in step (c) the etching is performed such that an average depth of the plurality of minute recessed portions increases but does not exceed a 1/7 of an average thickness of the barrier layer before the etching.

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Patent Owner(s)

Patent OwnerAddress
SHARP KABUSHIKI KAISHASAKAI CITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Hidekazu Osaka, JP 98 670
Isurugi, Akinobu Osaka, JP 21 142
Minoura, Kiyoshi Osaka, JP 233 1329
Nakamatsu, Kenichiro Osaka, JP 28 70

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