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    Optical information recording medium
    3.
    发明公开
    Optical information recording medium 审中-公开
    光学信息记录介质

    公开(公告)号：EP1229530A3

    公开(公告)日：2006-10-18

    申请号：EP02250641.4

    申请日：2002-01-30

    申请人： Ricoh Company, Ltd.

    发明人： Katoh, Masaki ,  Nakamura, Yuki ,  Yamada, Katsuyuki

    IPC分类号： G11B7/24

    CPC分类号： G11B7/243 ,  G11B7/006 ,  G11B7/126 ,  G11B7/2403 ,  G11B7/24067 ,  G11B7/2542 ,  G11B7/258 ,  G11B7/2585 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10S430/146

    摘要： A phase change optical recording medium is disclosed including at least a supporting substrate, and recording layer essentially consisting of AgInSbTe alloy compositions feasible of implementing recording and readout steps utilizing the change in reflectivity. The recording medium is characterized by the relation v 0 ≥ 0.7 v WH , where the critical relative velocity of phase change, v 0 , defined by the value of v, at which the differential coefficient, - dR (v) /dv, reaches a maximum, when the recording medium moves against an optical unit during the recording steps at a relative velocity, v, ranging from minimum and maximum relative velocities warranted for the recording medium, V WL and V WH , respectively. In addition, when the reflectivity is measured with varying erase power P E at the linear relative scanning velocity v 0 , the reflectivity of the recording layer as a function of erase power, R(P E ), preferably has a minimum. The recording layer included in the recording medium is devised to have an activation energy of deterioration of equal to, or larger than 1.6 eV, which is obtained by measuring asymmetry, A, and calculating according to the equations, k = dt/ dA, and k = k 0 x exp(E a /k B T). The recording medium is also characterized by activation energy of displacement of the boundary, ranging from 1.0 eV to 2.4 eV, which is obtained from the rate of decrease in the area, S, of the amorphous regions as recorded marks with time according to Arrhenius' equation.

    摘要翻译： 公开了一种相变光学记录介质，其包括至少一个支撑衬底和基本上由AgInSbTe合金组合物组成的记录层，该记录层可利用反射率的变化实现记录和读出步骤。 记录介质的特征在于关系v 0≥0.7vWH，其中相位变化的临界相对速度v 0由v的值定义，其中微分系数-dR（v）/ dv达到最大时的值v 记录介质在记录步骤期间以相对速度V在记录介质VWL和VWH所保证的最小和最大相对速度范围内分别抵靠光学单元移动。 另外，当以线性相对扫描速度v 0改变擦除功率PE测量反射率时，作为擦除功率R（PE）的函数的记录层的反射率优选地具有最小值。 包括在记录介质中的记录层被设计为具有通过测量不对称性A获得的等于或大于1.6eV的劣化激活能，并且根据等式计算k = dt / dA和 k = k0×exp（Ea / kBT）。 记录介质的特征还在于边界位移的激活能，其范围从1.0eV到2.4eV，这是由非晶区的面积减少速率S获得的，作为记录标记随时间的变化根据Arrhenius' 方程。

    Phase-change type optical information recording medium
    4.
    发明公开
    Phase-change type optical information recording medium 审中-公开
    Optisches Informationsaufzeichnungsmedium v​​om Phasenwechseltyp

    公开(公告)号：EP1182650A2

    公开(公告)日：2002-02-27

    申请号：EP01119462.8

    申请日：2001-08-13

    申请人： Ricoh Company, Ltd.

    发明人： Katoh, Masaki ,  Yamada, Katsuyuki ,  Nakamura, Yuki

    IPC分类号： G11B7/0045

    CPC分类号： G11B7/00454 ,  G11B7/243 ,  G11B7/2534 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/2595 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316

    摘要： The phase-change type optical information recording medium includes a transparent substrate, a first protective layer on the substrate, a recording layer on the first protective layer, a second protective layer on the recording layer, and a reflective layer on the second protective layer. Assuming that minimum recording linear velocity is V 1 and maximum recording linear velocity is V 2 , then a value of ratio I(V 2 ) /I(V 1 ) of a degree of modulation corresponding to the maximum and minimum linear velocities is between 1 and 1.2.

    摘要翻译： 相变型光信息记录介质包括透明基板，基板上的第一保护层，第一保护层上的记录层，记录层上的第二保护层和第二保护层上的反射层。 假设最小记录线速度为V1，最大记录线速度为V2，则与最大和最小线速度对应的调制度的比值I（V2）/ I（V1）的值为1至1.2。

    Optical information recording medium
    6.
    发明公开
    Optical information recording medium 审中-公开

    公开(公告)号：EP1286345A3

    公开(公告)日：2005-08-31

    申请号：EP02254631.1

    申请日：2002-07-02

    申请人： Ricoh Company, Ltd.

    发明人： Katoh, Masaki

    IPC分类号： G11B7/24 ,  G11B7/007 ,  G11B27/19 ,  G11B27/24

    CPC分类号： G11B7/243 ,  G11B7/00454 ,  G11B7/24079 ,  G11B7/24082 ,  G11B7/258 ,  G11B7/2585 ,  G11B27/24 ,  G11B2220/216 ,  G11B2220/2537

    摘要： A rewritable optical information recording medium includes a transparent substrate on which a groove is formed, and a recording layer on which frequency-modulated address information is recorded by wobbling the groove. The recording layer is provided on the transparent substrate. In the rewritable optical information recording medium, J(M) / M ≦ 0.17 is satisfied where J(M) is relative jitter with respect to a basic clock T0 and M is a degree of modulation of recorded signal. The relative jitter J(M) is given by J(M) = Tσ (M) / T0 when Tσ (M) is jitter with respect to the degree of modulation M. The jitter Tσ (M) is caused in the demodulated address information which is one modulated according to mark length modulation.

    Phase change optical recording medium
    8.
    发明公开
    Phase change optical recording medium 审中-公开
    Optisches Aufzeichnungsmedium mitPhasenänderung

    公开(公告)号：EP1223577A3

    公开(公告)日：2006-05-24

    申请号：EP02250177.9

    申请日：2002-01-10

    申请人： Ricoh Company, Ltd.

    发明人： Nakamura, Yuki ,  Katoh, Masaki

    IPC分类号： G11B7/26 ,  G11B7/24 ,  G11B7/125

    CPC分类号： G11B7/1267 ,  C23C14/0623 ,  C23C14/3414 ,  G11B7/0045 ,  G11B7/00454 ,  G11B7/0062 ,  G11B7/243 ,  G11B7/2542 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/26 ,  G11B7/268 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316

    摘要： A phase change optical recording medium is disclosed together with the methods for optimally initializing and recording such recording media, feasible for carrying out read/write/erase operations at multiple recording velocities ranging from 4.8 m/sec to 30 m/sec. Preferably, a recording layer included in the recording medium essentially consists of Ag, In, Sb and Te, with the proportion in atom % of a(Ag): b(In): c(Sb): d(Te), with 0.1 ≤ a ≤ 7, 2 ≤ b ≤ 10, 64 ≤ c ≤ 92 and 5 ≤ d ≤ 26, provided that a + b + c + d ≥ 97. The method for initializing the recording medium with a scanning beam spot from a high power semiconductor laser is characterized by the energy density input by the beam spot during one period of through scan is equal to, or less than, 1000 J/m 2 , scanning speed of beam spot is in the range of 3.5 m/sec to 6.5 m/sec, and the intensity of laser emission equal to, or greater than 330 mW. Furthermore, the present method for determining an optimum recording power includes at least the step of calculating a normalized gradient g(P), from the equation g(P)= (m/Δm)/(P/ΔP), where ΔP is an infinitesimal change in the vicinity of recording power P, and Δm is an infinitesimal change in the vicinity of signal amplitude m.

    摘要翻译： 公开了一种相位改变光记录介质以及用于最佳地初始化和记录这种记录介质的方法，可用于以4.8m / sec至30m / sec的多个记录速度进行读/写/擦除操作。 优选地，记录介质中包括的记录层基本上由Ag，In，Sb和Te组成，原子％的比例为（Ag）：b（In）：c（Sb）：d（Te），0.1 ‰¤‰¤‰¤‰¤‰¤¤‰‰‰¤¤‰¤¤‰¤¤¤²²‰²¤¤¤¤¤¤¤¤¤¤¤¤¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ 具有来自大功率半导体激光器的扫描光束点的介质的特征在于通过扫描期间的束斑输入的能量密度等于或小于1000J / m 2，束斑的扫描速度为 3.5m / sec至6.5m / sec的范围，激光发射强度等于或大于330mW。 此外，用于确定最佳记录功率的本方法至少包括从公式g（P）=（m /“m）/（P /”P））计算归一化梯度g（P）的步骤，其中“ P是记录功率P附近的微小变化，“m”是信号幅度m附近的无穷小变化。