| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical recording medium for a near field system which has high intensity of reproduced signals and which is hardly damaged on the surface, and to provide a production method of the medium and an optical recording device equipped with that optical recording medium. SOLUTION: The optical recording medium consists of a substrate 11, reflection film 12 formed on the substrate, recording layer 14 formed on the reflection film, and first protective layer 15 formed on the recording layer 14. In the medium, information is recorded and reproduced by irradiating the recording layer 14 with light from an optical system through the first protective layer 15 side. Further, a surface protective layer 16 is formed on the first protective layer 15. The gap between the surface protective layer 16 and the optical system presents a near field, and the surface protective layer 16 has a specified refractive index and film thickness to mitigate changes in the reproducing signal intensity caused by changes in the gap, and the layer preferably consists of a silicon oxide film having >=100 nm film thickness. The invention also provides a production method of the medium and an optical recording device equipped with that optical recording medium. |
