Optical cards and processes for preparing the same
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United States of America Patent
Stats
-
Jun 28, 1988
Grant Date -
N/A
app pub date -
Feb 18, 1986
filing date -
Feb 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
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Cited Art Landscape
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