| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk and manufacturing method of the optical disk with which an SN ratio at reproduction can be improved. <P>SOLUTION: On the optical disk 1, a reflective layer protective layer 11 is formed on the surface of a label side substrate 10 and further on the surface, a reflective layer 12 is formed by evaporating an aluminum and the like. In the reflective layer 12, a groove 12S is formed. The wall surface 12SR of the groove tilts against an incidence direction (the same direction as the incidence direction of a recording light L<SB>R</SB>) of reproduced light. Also, an information recording layer 13 constituted of materials decomposed by heat due to irradiation of the recording light L<SB>R</SB>is provided inside the groove. <P>COPYRIGHT: (C)2007,JPO&INPIT |
