Optical information recording medium having discernible obverse and reverse sides
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Oct 9, 1996
filing date -
Dec 8, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A laminate type optical information recording medium which is identifiable on the basis of its color, is formed without change to conventional manufacturing steps by laminating two optical information recording media, each of which includes at least a substrate on which information is recorded, a semi-transparent layer for reflecting a reproduction laser beam, a transparent resin layer formed to cover the semi-transparent layer, a reflection layer for reflecting the reproduction laser beam and an adhesive layer formed to cover the reflection layer. The two substrates of the laminate type optical information recording medium have different transmission spectra in a visible region.
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