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    • 21. 发明授权
    • Optical recording medium and method of producing the same
    • 光记录介质及其制造方法
    • US07964337B2
    • 2011-06-21
    • US12348754
    • 2009-01-05
    • Shin MasuharaJun Nakano
    • Shin MasuharaJun Nakano
    • G03C5/00
    • G11B23/40G11B7/24094G11B7/261
    • An optical recording medium wherein characters can be easily recognized on an optical disk irradiated with a light through a light transmitting layer and a method of producing the same are provided. In an optical disk of a type that an optical recording layer is irradiated with a light through a light transmitting protective layer, dealing with a larger capacity, wherein one main surface of a medium substrate 15 is divided to a signal portion SG and a character portion CA, a signal portion uneven shape (15p) is formed on the signal portion SG and a character portion uneven shape (15p) is formed on the character portion CA, and depths of the signal portion uneven shape and the character portion uneven shape are 25 nm or less. Here, it is configured that characters are recorded to be able to be read as normal characters when looking from the medium substrate 15 side (Y-direction) by outlines of a region formed with the character portion uneven shape on the character portion CA.
    • 提供了通过透光层照射光的光盘上容易识别字符的光记录介质及其制造方法。 在通过透光保护层照射光记录层的类型的光盘中,处理较大的容量,其中介质基板15的一个主表面被划分成信号部分SG和字符部分 CA,在信号部分SG上形成信号部分不均匀形状(15p),并且在字符部分CA上形成字符部分不均匀形状(15p),信号部分不均匀形状和字符部分不均匀形状的深度为25 nm以下。 这里,通过在字符部分CA上形成有字符部分不均匀形状的区域的轮廓,从介质基板15侧(Y方向)观察时,构成为能够作为普通字符读取字符。
    • 27. 发明申请
    • Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same
    • 具有高密度轨道间距的光记录介质和用于记录和重放的光盘驱动器
    • US20050163033A1
    • 2005-07-28
    • US11081555
    • 2005-03-17
    • Isao IchimuraKiyoshi OsatoJun NakanoShin Masuhara
    • Isao IchimuraKiyoshi OsatoJun NakanoShin Masuhara
    • G11B7/007G11B7/24
    • G11B7/24G11B7/007G11B7/00718G11B7/24079G11B7/24082
    • The present invention provides an optical recording medium and an optical disk device realizing prevention of crosswrite and uniformity of playback signals and capable of easily securing compatibility with a read only disk. It provides an optical recording medium on which light LB condensed by a lens (12, 14) having a numerical aperture of 0.85±0.1 and a wavelength of 405±5 nm is focused for recording or playback, having a substrate 1 formed with a groove 2 in its surface, an optical recording layer 3 formed on the substrate and having topography corresponding to the groove, and a light transmission type protection layer 4 formed on the optical recording layer; used when light for recording or playback is focused from the protection layer side to the optical recording layer; using as a recording area only the optical recording layer of one of a side far from the emitting side of the light for recording or playback, that is, a portion corresponding to a recessed portion of the topography, and a side close to it, that is, a portion corresponding to a projecting portion; having a track pitch of 0.32±0.01 μm; and having a depth D2 of a recessed portion with respect to a projecting portion in the range of 19 to 24 nm.
    • 本发明提供了一种光学记录介质和光盘装置,其实现了防止重放信号的横向和均匀性并且能够容易地确保与只读盘的兼容性。 它提供了一种光学记录介质,其上聚焦有数字孔径为0.85±0.1和波长为405±5nm的透镜(12,14)的光LB用于记录或重放,其具有形成有凹槽 2,形成在基板上并且具有与凹槽对应的形貌的光学记录层3和形成在光学记录层上的透光型保护层4; 用于记录或重放的光从保护层侧聚焦到光学记录层; 仅使用远离用于记录或重放的光的发射侧的一侧的光记录层,即与形貌的凹陷部相对应的部分和靠近它的一侧的光记录层, 是对应于突出部分的部分; 轨道间距为0.32±0.01 mum; 相对于突出部的凹部的深度D 2在19〜24nm的范围内。