RECORDING LAYER FOR OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING MEDIUM, AND SPUTTERING TARGET

• Main Authors: MISHIYAMA KOHEI, TAUCHI HIRONORI
• Format: Patent
• Language: English; Japanese
• Published: 17.06.2021
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PHYSICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

To provide a recording layer for an optical information recording medium with excellent basic characteristics such as degree of modulation and C/N ratio, and excellent power margin, and an optical information recording medium using the recording layer for an optical information recording medium.SOLUTION: A recording layer for an optical information recording medium according to the present invention is a recording layer for an optical information recording medium capable of recording information signals by irradiation with a laser beam, and having metal oxides including Sn oxide or Ta oxide as well as Mn oxide and W oxide, and an atomic number ratio of Mn to the total atomic number of metal elements that make up the metal oxide is 3 atom% or more and 40 atom% or less. The optical information recording medium according to the present invention comprises the recording layer for an optical information recording medium, and a protective layer laminated on the front face and the back face of the recording layer for an optical information recording medium, the protective layer is a dielectric.SELECTED DRAWING: Figure 1 【課題】本発明は、変調度やＣ／Ｎ比といった基本特性に優れると共に、パワーマージンに優れる光情報記録媒体用記録層及びこの光情報記録媒体用記録層を用いた光情報記録媒体の提供を目的とする。【解決手段】本発明の光情報記録媒体用記録層は、レーザ光の照射により情報信号を記録可能な光情報記録媒体用記録層であって、Ｍｎ酸化物とＷ酸化物と共にＳｎ酸化物又はＴａ酸化物を含む金属酸化物を有し、上記金属酸化物を構成する金属元素の合計原子数に対するＭｎの原子数割合が３ａｔｍ％以上４０ａｔｍ％以下である。本発明の光情報記録媒体は、上記光情報記録媒体用記録層と、上記光情報記録媒体用記録層の表面及び裏面に積層される保護層とを備え、上記保護層が誘電体である。【選択図】図１