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Optical information recording medium
| Details |
Inventors: Kobayashi, Setsuo; Iwasaki, Kishiro; Nakamura, Mariko; Sasaki, Hiroshi; Ito, Yutaka;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Bowers, Jr.; Charles L.
Assistant Examiner: Chea; Thorl
Attorney, Agent or Firm: Antonelli, Terry, Stout & Kraus
An optical information recording medium comprising a substrate and formed thereon an information recording layer comprising at least two organic dyes having different chemical structures and continuous playback ability of 10.sup.5 times or more at a playback laser power of 0.5 to 1.5 mW, is excellent in readout light stability (durability) and reflectance. |
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DETAILED DESCRIPTION It is an object of the present invention to provide an optical information recording medium excellent in durability and reflectance of an information recording medium layer, and can be produced by spin coating, spray coating or dip coating an organic recording medium layer on a substrate.
It is other objects of the present invention to provide a process for producing such an optical information recording medium and applications of such an optical information recording medium.
The present invention provides an optical information recording medium comprising a substrate and an information recording layer formed on the substrate, said information recording layer comprising one or more organic dyes having continuous playback ability of 10.
sup.
5 times or more at a playback laser power of 0.
5 to 1.
5 mW.
The present invention further provides an optical information recording medium comprising a substrate, and an information recording layer formed on the substrate, said information recording layer comprising two or more organic dyes having different chemical structures and continuous readout ability of 10.
sup.
5 times or more at a readout laser power of 0.
5 to 1.
5 mW.
The present invention also provide a process for producing an optical information recording medium, which comprises forming an information recording layer containing two or more organic dyes having different chemical structures and continuous readout ability of 10.
sup.
5 times or more at a readout laser power of 0.
5 to 1.
5 mW on a substrate by spin coating, spray coating or dip coating.
The present invention further provide a playback (or readout) apparatus using such an optical information recording medium, and a readout method using such a readout apparatus.
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Manufacturing Materials 
