Title:
【発明の名称】光情報記録媒体
Document Type and Number:
Japanese Patent JP3020219
Kind Code:
B2
Abstract:
PURPOSE:To obtain an optical data recording medium having high reliability and stable quality by adding an equilibrium mixture of an asymmetric dithiolate metal complex and a symmetric dithiolate metal complex to at least one of the undercoat layer, protective layer and recording layer of the optical data recording medium. CONSTITUTION:In an optical data recording medium obtained by providing a recording layer containing an org. dye based on a polymethine compound on a substrate, an equilibrium mixture of an asymmetric dithiolate metal complex and a symmetric ditholate metal complex is added. The change of the composition of a coating solution with the elapse of time is eliminated and a recording film having stable quality can be prepared and the optical data recording medium excellent in heat stability and light stability can be obtained. As a solvent used in order to form an equilibrium state, acetonitrile, acetone, ethyl acetate, 1,2-dichloroethane and the like are designated. The desirable mol ratio of the symmetric dithiolate metal complex and the asymmetric dithiolate metal complex is 6:4-2:8. When the ratio of the asymmetric dithiolate metal complex is less than 40% and larger than 80%, compositional stability is deteriorated.
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| JPS6472343 | OPTICAL RECORDING MEDIUM |
| JPS6352134 | OPTICAL RECORDING METHOD |
Inventors:
Issei Nagai
Application Number:
JP32406690A
Publication Date:
March 15, 2000
Filing Date:
November 27, 1990
Export Citation:
Assignee:
株式会社リコー
International Classes:
B41M5/26; G03C1/735; G11B7/244; G11B7/247; G11B7/249; (IPC1-7): B41M5/26; G11B7/24
Domestic Patent References:
| JP61210539A | ||||
| JP5983695A | ||||
| JP258575A |
Attorney, Agent or Firm:
Toshiaki Ikeura