| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical recording medium that has a satisfactory initial recording characteristic and can preserve recorded information in an excellent state over a long time. <P>SOLUTION: This optical recording medium is provided with a substrate 40, a protective layer 30, a first recording layer 21 including elements selected from a group composed of Si, Ge, Sn, Mg, In, Zn, Bi and Al as main components and a second recording layer 22 located near the first recording layer and including Cu as a main component between the substrate and the protective layer. When the optical recording medium is irradiated with laser beams L10, the elements included in the first recording layer as the main components are mixed with the element included in the second recording layer as the main component to form a region with changed reflectance, thereby recording information. <P>COPYRIGHT: (C)2004,JPO |
