| 摘要 |
PROBLEM TO BE SOLVED: To suppress quantity of data which is lost when collision of light condensing elements is generated to a minimum by providing a signal recording layer positioned essentially on a surface section facing the light condensing element and having a non-reflection coating film formed on the surface section. SOLUTION: This information recording disk consists of a substrate 1, a reflecting film 2 consisting of aluminum, a second dielectric film 3, a signal recording layer 4 and a first dielectric film 5 formed in this order from the side of the substrate 1. An enhancing condition to the substrate 1 and an enhancing condition at a beam waist are constructed by the films of four layers of the reflecting film 2, the second dielectric film 3, the signal recording layer 4 and the first dielectric film 5. Non-reflecting coating consisting of third, fourth and fifth dielectric films 6, 7 and 8 is formed on the first dielectric film 5. The non-reflecting coating consisting of the third, fourth and fifth dielectric films 6, 7 and 8 makes the first dielectric film 5 non-reflect the beam made incident from a light condensing element (SIL) 10 at an angle to the surface of the information recording disk. |
