| 摘要 |
PURPOSE:To provide high reflectivity and to enhance recording sensitivity by containing a substance mainly absorbing laser beam and a substance mainly deteriorated and decomposed by heating in a recording layer. CONSTITUTION:In a recording layer, an org. dye material is used as a recording material and two kinds of substances are also used in a mixed state. The first substance (component 1) is one mainly absorbing laser beam and, concretely, there are a cyannine dye, a metal complex dye, a phthalocyanine dye and a naphthalocyanine dye. The second substance (component 2) absorbs almost no laser wavelength and is deteriorated and decomposed with a sudden temp. rise due to laser irradiation to generate gas. As a substance usable in the component 2, a cyanine dye (absorbing no laser wavelength) and a cumarine dye are designated. Herein, the mixing ratio of two kinds of the substances compounded with the recording layer is regulated to easily set reflectivity to 70% or more. |
