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    • 7. 发明申请
    • Optical recording medium
    • 光记录介质
    • US20070261068A1
    • 2007-11-08
    • US11236840
    • 2005-09-28
    • Masafumi YoshihiroOsamu IshizakiToshinori SugiyamaYoshiyuki NagatakiHironori Ota
    • Masafumi YoshihiroOsamu IshizakiToshinori SugiyamaYoshiyuki NagatakiHironori Ota
    • G11B7/24
    • G11B7/24038G11B7/00454G11B7/00455G11B7/00736G11B7/1267
    • An optical recording medium having two information sections (L0 and L1 layers) is provided by holding relationships: R1≧R3+r R2≦R4−r wherein R1, R2, R3, and R4 represent distances from the center of the medium at radial positions: R of an innermost circumferential track of a test area disposed on an inner circumferential side of the L1 layer; R of an outermost circumferential track of a test area disposed on an outer circumferential side of the L1 layer; R of an innermost circumferential guide groove of an information-recording area of the L0 layer; and R of an outermost circumferential guide groove of the information-recording area of the L0 layer respectively, and r represents a radius of a light beam on the L0 layer when the light beam is collected on the L1 layer.
    • 通过保持关系提供具有两个信息部分(L0和L1层)的光学记录介质:<?in-line-formula description =“In-line formula”end =“lead”?> R1> = R3 + r < in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line-formula description =“In-line Formulas”end =“lead”?> R2 <= R4-r < in-line-formula description =“In-line Formulas”end =“tail”?>其中R 1,R 2,R 3和R 4表示在径向位置处介质中心的距离:R 设置在L1层的内周侧的测试区域的轨迹; R设置在L1层的外周侧的测试区域的最外圆周轨迹; R为L0层的信息记录区域的最内圆周引导槽; 和R是L0层的信息记录区域的最外周向引导槽的R,r表示在L1层上收集光束时的L0层上的光束的半径。
    • 9. 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。