| 摘要 |
PURPOSE:To greatly enhance the sensitivity by forming a dye layer containing a dye and a polymer and having a specific film thickness on a substrate and specifying the ratio of the polymer contained in the dye layer and the absolute of the temp. gradient of the surface tension of the polymer. CONSTITUTION:A dye layer containing a dye and a polymer and having a film thickness of 1400Angstrom or more is formed on a substrate and the ratio of the polymer contained in the dye layer is 20-50% on a wt. basis and the absolute value of the temp. gradient of the surface tension of the polymer is 0.07dyne/ cm.K or more. Herein, as the org. dye material contained in the dye layer, concretely, a cyanine dye, a metal complex dye, a phthalocyanine dye, a naphthalocyanine dye or the like are designated. As the polymer to be added, the temp. gradient of the surface tension thereof is important and a polymer wherein the absolute value thereof is 0.07dyne/cm.K or more is selectively used. That is, by using the polymer high in the absolute value of the temp. gradient of surface tension as a binder, moving force becomes large and the sensitivity of an optical recording medium is estimated to be enhanced. |
