发明名称 |
Optical cards and processes for preparing the same |
摘要 |
An optical card comprising a card substrate and a light reflective layer provided on said card substrate, said light reflective layer comprising an optical reflective metallic thin film having a light information pattern formed therein is prepared by forming said optical information pattern by photoetching. According to this optical card, it is possible to readily carry out high density recording. |
申请公布号 |
US4754128(A) |
申请公布日期 |
1988.06.28 |
申请号 |
US19860827714 |
申请日期 |
1986.02.18 |
申请人 |
DAI NIPPON INSATSU KABUSHIKI KAISHA |
发明人 |
TAKEDA, MITSURU;KURAMOCHI, WATARU |
分类号 |
B42D15/10;G06K19/06;G11B7/0033;G11B7/24;G11B7/26;(IPC1-7):G06K19/02 |
主分类号 |
B42D15/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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