High density disc
    7.
    发明公开
    High density disc 审中-公开
    Platte hoher Speicherdichte

    公开(公告)号:EP1274074A2

    公开(公告)日:2003-01-08

    申请号:EP02254640.2

    申请日:2002-07-02

    IPC分类号: G11B7/007 G11B7/24

    CPC分类号: G11B7/007 G11B23/0035

    摘要: A high density disc having a data area (130) which is set to maintain compatibility with existing drives while providing a superior recording/reproducing feature. The high density disc has a center hole (100), a clamping area (110), a data area (130) where user data is recorded, a lead-in area (120) located at the inner side of the data area, and a lead-out area (140) located at the outer side of the data area. In the high density disc the diameter of the center hole (100) is 10 mm or more, and the inner diameter of the clamping area (110) is characteristically within a range of 20-26 mm. Also, the inner diameter of the data area (130) is characteristically within a range of 35-40 mm. Therefore, while a conventional disc drive is still used, the size of the high density disc decreases and a recording capacity can be increased.

    摘要翻译: 具有数据区域(130)的高密度盘,其被设置为与现有驱动器保持兼容性,同时提供优异的记录/再现特征。 高密度盘具有中心孔(100),夹持区域(110),记录用户数据的数据区域(130),位于数据区域内侧的导入区域(120),以及 位于数据区域的外侧的导出区域(140)。 在高密度盘中,中心孔(100)的直径为10mm以上,夹紧区域(110)的内径特征在20-26mm的范围内。 此外,数据区域(130)的内​​径特征在35-40mm的范围内。 因此,虽然仍然使用常规的盘驱动器,但是高密度盘的尺寸减小,并且可以提高记录容量。

    Phase change optical disc
    8.
    发明公开
    Phase change optical disc 审中-公开
    相变光盘

    公开(公告)号:EP1071087A2

    公开(公告)日:2001-01-24

    申请号:EP00306118.1

    申请日:2000-07-18

    IPC分类号: G11B7/24

    摘要: A phase change optical disc is provided. The phase change optical disc has a multilayer structure in which on a transparent substrate (21) are sequentially laminated a first dielectric layer (22), a phase control layer (23), on which the two areas where a phase difference occurs due to irradiation with the reproduction beam, thus altering the optical path of the reproduction beam, are defined in a laser spot, a second dielectric layer (24), a phase change recording layer (25), which reversibly converts between a crystal phase and an amorphous phase by irradiation with a recording beam, a third dielectric layer (26), a reflective layer (27), and a protective layer (29). The information of a record mark can be reproduced due to the phase difference between adjacent areas on the phase control layer, thereby reducing the size of the effective spot of the reproduction beam. Accordingly, the mixing of the signals between adjacent marks or adjacent tracks is decreased, thereby realizing a high density optical disc and improving the resolution power of a reproduction signal.

    摘要翻译: 提供相变光盘。 相变光盘具有多层结构,其中在透明基板(21)上依次层叠第一介电层(22),相位控制层(23),在该相位控制层(23)上由于照射而出现相位差的两个区域 在激光点,第二电介质层(24),相变记录层(25)中限定了再现光束,从而改变再现光束的光路,所述相变记录层在晶体相和非晶相之间可逆地转换 通过照射记录光束,形成第三介电层(26),反射层(27)和保护层(29)。 记录标记的信息可以由于相位控制层上的相邻区域之间的相位差而被再现,从而减小再现光束的有效点的尺寸。 因此,相邻标记或相邻轨道之间的信号混合被减少,由此实现高密度光盘并提高再现信号的分辨率。