| 摘要 |
PURPOSE:To obtain high reflectivity, high contrast, and to improve durability, weather resistance by forming a recording layer of an optically reflecting layer made of a thin metal film and a light absorbing layer on a nitrocellulose layer. CONSTITUTION:A nitrocellulose layer is formed on a substrate, an optically reflecting layer and a light absorbing layer are sequentially laminated to form a recording layer. When a light such as a laser light is radiated, the absorbing layer absorbs a recording light to rise at its temperature in case of melting, thereby thermally conducting or directly heating the nitrocellulose layer. Thus, the cellulose layer serves as an initiator to deform the recording layer, thereby causing recording. Thus, the boundary of bits becomes clear by the cellulose layer. Since an optically reflecting layer is provided, an optically recording layer having features of high reflectivity and high contrast is obtained. |
