| 摘要 |
PURPOSE:To provide an optical recording medium which eliminates the need for separately providing a reflective layer comprising an inorganic compound, by using a specified anthraquinone dye in a recording layer and controlling the film thickness of the recording layer to an appropriate value. CONSTITUTION:A transparent base and a recording layer having a film thickness of 50-400nm and comprising an anthraquinone dye of general formula (1), wherein each of R<1> and R<2>, which may be the same or different, is subst. or unsubst. alkyl, subst. or unsubst. aryl, subst. or unsubst. alkenyl or cycloalkyl, and each of Y<1> and Y<2>, which may be the same or different, is hydroxyl or hydrogen, are provided, in an optical recording medium for recording and reproducing signals by reflected light. Because the recording layer itself has a fairy high reflectance, focus control of a laser beam and track control of a signal- writing position in recording or reading signals can be performed without requiring a conventional reflective layer constituted of a thin metallic film or an inorganic compound. |
