| 摘要 |
PURPOSE:To improve the sensitivity of a laser recordig material and the shape of a bit formed at the time of recording, by providing a thin film layer comprising a specific tin-copper alloy on the surface of a substrate. CONSTITUTION:A laser recording material 1 is obtained by providing metal thin film layer 3 comprising a tin-copper alloy containing 1-40atomic% copper on the surface of a substrate 2. As the substrate, either one of ones conventionally used as the substrate as the laser recording material can be used. With respect to the method for providing the metal thin film 3 on the surface of the substrate 2, a known vapor deposition method or a sputtering method can be utilized. |
