| 摘要 |
<p>It is an object of the present invention to provide an optical recording disk which can record data therein and reproduce data therefrom even in the case where the lengths of a recording mark and a blank region between neighboring recording marks which constitute the data are shorter than the resolution limit and whose storage capacity can be markedly increased. An optical recording disc according to the present invention is constituted by laminating a substrate 2, a reflective layer 3, a third dielectric layer 4, a light absorption layer 5, a second dielectric layer 6, a metal recording layer 7, a first dielectric layer 8 and a light transmission layer 9 in this order, and is constituted so that when a laser beam L is projected onto the optical recording disc from the side of the light transmission layer 9, the metal recording layer 7 is deformed and/or is changed in quality to form a state-changed region 7a in the metal recording layer 7 and the second dielectric layer 6 and the light absorption layer 5 are deformed and/or are changed in quality to form state-changed regions in the second dielectric layer 6 and the light absorption layer 5, whereby a recording mark is formed in the metal recording layer 7, the second dielectric layer 6 and the light absorption layer 5.</p> |
