| 摘要 |
An optical recording disc capable of recording/reproducing data constituted of a recording mark array including recording marks and blank areas even when the length of the recording marks or the length of the blank area between adjacent recording marks is shorter than a resolution limit, and capable of increasing the recording capacity greatly. The optical recording disc comprises a substrate (2), a third dielectric layer (3), a light absorption layer (4), a second dielectric layer (5), a decomposition reactive layer (6) principally containing a platinum oxide, a first dielectric layer (7), and a light transmitting layer (8), characterized in that the platinum oxide in the decomposition reactive layer (6) is decomposed into platinum and oxygen when the decomposition reactive layer (6) is irradiated with a laser beam (20) through the light transmitting layer (8), cavities are formed by oxygen gas thus produced, and a recording mark is formed on the decomposition reactive layer (6) by fine platinum particles deposited in the cavities.
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