| 摘要 |
PROBLEM TO BE SOLVED: To provide a rewritable three-layer recording medium compatibly achieving high transmissivity of a translucent information layer in a light incident surface side and not causing film peeling after high-temperature and high-humidity storage.SOLUTION: The rewritable three-layer optical recording medium is a three-layer structure including an Llayer provided on a substrate, and translucent Llayer and Llayer. Each of the Llayer, the Llayer and the Llayer has a recording film composed of a phase-change material. The Llayer 20 comprises, disposed in order from the light incident side, a first dielectric layer 22, an Lrecording film 21, a second dielectric layer 24, a reflection film 26, and a third dielectric layer 28. The first dielectric layer 22 has an outer first interface layer 22A, the second dielectric layer 24 is two-layer structure including an inner first interface layer 24A and an inner second interface layer 24B, and the third dielectric layer 28 is three-layer structure including a first dielectric film 28A, a second dielectric film 28B and a third dielectric film 28C. The outer first interface layer 22A and the inner first interface layer 24A include 40-80 mol% of CrOrespectively, and the inner first interface layer 24A has film thickness of 1-7 nm. |
