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    Optical information recording medium and process for recording thereon
    25.
    发明公开
    Optical information recording medium and process for recording thereon 有权
    OptischerAufzeichnungsträgerund Aufzeichnungsverfahren

    公开(公告)号：EP1418575A1

    公开(公告)日：2004-05-12

    申请号：EP03025248.0

    申请日：2003-11-05

    申请人： Ricoh Company Ltd.

    发明人： Kato, Masaki ,  Yamada, Katsuyuki

    IPC分类号： G11B7/24 ,  G11B7/125 ,  G11B7/00

    CPC分类号： G11B7/257 ,  G11B7/00454 ,  G11B7/00456 ,  G11B7/0062 ,  G11B7/243 ,  G11B7/266 ,  G11B7/268 ,  G11B2007/25715 ,  Y10S430/146

    摘要： An optical information recording medium, especially a CD-RW medium, that can undergo direct overwriting at high speed is disclosed. The optical information recording medium includes a transparent substrate, at least a recording layer and a reflective layer on or above the substrate and is capable of performing at least one of recording, erasing and rewriting information by irradiating and scanning with focused light to thereby form and/or erase recording marks on the recording layer. The recording layer contains an alloy and/or an intermetallic compound mainly containing Ga, Ge, Sb, and Te in a compositional ratio represented by the following formula:

            Ga x Ge y (Sb z Te 1-z ) 1-x-y

    wherein x, y, and z each represent an atomic ratio of a positive real number less than 1 and satisfy the following conditions: 0.02≤x≤0.06, 0.01≤y≤0.06, 0.80≤z≤0.86, x≥y, and x+y≤0.1

    摘要翻译： 公开了可以高速直接重写的光信息记录介质，特别是CD-RW介质。 光信息记录介质包括在基板上或上方的至少记录层和反射层的透明基板，能够通过用聚焦光照射和扫描来执行记录，擦除和重写信息中的至少一个，从而形成和 /或擦除记录层上的记录标记。 记录层含有以下式表示的组成比的主要含有Ga，Ge，Sb和Te的合金和/或金属间化合物：GaxGey（SbzTe1-z）1-xy其中x，y和z各自表示 正实数小于1的原子比，满足下列条件：0.02≤x≤0.06,0.01≤y≤0.06,0.80≤z≤0.86，x≥y，x +y≤0.1

    Optical recording medium
    26.
    发明公开
    Optical recording medium 有权
    选择Aufzeichnungsmedium

    公开(公告)号：EP1406254A2

    公开(公告)日：2004-04-07

    申请号：EP03020816.9

    申请日：2003-09-12

    申请人： Ricoh Company Ltd.

    发明人： Deguchi, Hiroshi ,  Yuzurihara, Hajime ,  Hibino, Eiko ,  Miura, Hiroshi ,  Abe, Mikiko ,  Narumi, Shinya ,  Kibe, Takeshi ,  Yamada, Katsuyuki ,  Taniguchi, Satoshi

    IPC分类号： G11B7/24

    CPC分类号： G11B7/0062 ,  G11B7/24 ,  G11B7/243 ,  G11B7/252 ,  G11B7/2534 ,  G11B7/257 ,  G11B7/259 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10T428/21

    摘要： An optical disc having a transition linear velocity of 8-11 m/s when irradiating continuous light with 11±1 mW and a wavelength of 660±10 nm using a pickup head with a numerical aperture (NA) of 0.65, and satisfying the following condition: ΔR = |Rb-Ra| ≤ 3% where Rb is a reflectance of an unrecorded area, and Ra is a reflectance of the top of an eye pattern after ten cycles of recording. In one recording mode therefor, the disc is rotated at a constant angular velocity so as to have a linear velocity of 3-4 m/s on an innermost track and a linear velocity of 8-9 m/s on an outermost track. In another mode, the disc is rotated at a constant angular velocity so as to have a linear velocity of 5-6 m/s on an innermost track and a linear velocity of 13-14 m/ s on an outermost track.

    摘要翻译： 当使用数值孔径（NA）为0.65的拾取头照射11 +/- 1mW和波长为660 +/- 10nm的连续光时，具有8-11m / s的过渡线速度的光盘， 并且满足以下条件：其中Rb是未记录区域的反射率，Ra是10次记录周期之后的眼图的顶部的反射率，其中，ΔDR=RbRaR≤3％。 在一种记录模式中，盘以恒定的角速度旋转，以便在最内轨道上具有3-4m / s的线速度，在最外侧的轨道上具有8-9m / s的线速度。 在另一种模式中，盘以恒定的角速度旋转，以便在最内侧的轨道上具有5-6m / s的线速度，在最外侧轨道上具有13-14m / s的线速度。