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    • 2. 发明授权
    • Optical recording medium
    • 光记录介质
    • US07478413B2
    • 2009-01-13
    • US10920380
    • 2004-08-18
    • Jun KanehiraOsamu Ishizaki
    • Jun KanehiraOsamu Ishizaki
    • G11B7/24
    • G11B7/24097G11B7/266G11B23/0035
    • An optical recording medium includes a plane ring-shaped substrate in which a center hole is opened at the center thereof, a recording-retrieving function layer and a cover layer each having an outer diameter approximately equal to that of the substrate and an inner diameter larger than an outer diameter of the center hole, are stacked on the substrate, and as a separate entity from the cover layer, a clamp portion which is for holding and fixing the substrate and which has an outer diameter smaller than inner diameters of the recording-retrieving function layer and the cover layer, is provided around the center hole in a region where the cover layer is not formed.
    • 光记录介质包括其中心孔在其中心开口的平面环形基底,记录检索功能层和覆盖层,每个外围具有与基底相近的外径,内径较大 与中心孔的外径相比,堆叠在基板上,并且作为与覆盖层分离的实体,具有用于保持和固定基板的夹紧部分,该夹持部分的外径小于记录层的内径, 提取功能层和覆盖层,设置在未形成覆盖层的区域中的中心孔周围。
    • 4. 发明申请
    • Information-recording medium
    • 信息记录介质
    • US20080260985A1
    • 2008-10-23
    • US12068531
    • 2008-02-07
    • Hiroshi ShiraiKazuyoshi AdachiOsamu IshizakiTsuyoshi Onuma
    • Hiroshi ShiraiKazuyoshi AdachiOsamu IshizakiTsuyoshi Onuma
    • G11B7/24
    • G11B7/24038G11B2007/24312G11B2007/24314G11B2007/24316
    • An information-recording medium includes first and second recording layers each of which is formed of a phase-change material containing Bi, Ge, and Te, wherein the first recording layer is arranged nearer to a light-incident side of the laser beam than the second recording layer; a composition of Bi, Ge, and Te contained in the second recording layer is within a composition range surrounded by composition points B2, C2, D2, D6, C6, and B6 on a triangular composition diagram of Bi, Ge, and Te; and a difference (α−δ) between a composition α of Bi in the first recording layer and a composition δ of Bi in the second recording layer is −1.0 to 3.0 at. %. Thus, there is provided a two-layered information-recording medium with high recording-data reliability and excellent repeated-data recording durability.
    • 信息记录介质包括第一和第二记录层,每个记录层由包含Bi,Ge和Te的相变材料形成,其中第一记录层被布置成比激光束的光入射侧更靠近激光束的光入射侧 第二记录层; 包含在第二记录层中的Bi,Ge和Te的组成在组成点B 2,C 2,D 2,D 6,C 6和B 6的组成范围内,Bi的三角形组成图上, Ge,Te; 并且第一记录层中Bi的组成α和第二记录层中Bi的组成δ之差(α-δ)为-1.0至3.0at。 %。 因此,提供了具有高记录数据可靠性和优异的重复数据记录耐久性的双层信息记录介质。