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    Optical information recording medium having protective layer
    2.
    发明授权
    Optical information recording medium having protective layer 失效
    具有保护层的光学信息记录介质

    公开(公告)号：US4920359A

    公开(公告)日：1990-04-24

    申请号：US376213

    申请日：1989-07-03

    申请人： Yuji Arai ,  Emiko Hamada ,  Yuaki Shin ,  Takashi Ishiguro

    发明人： Yuji Arai ,  Emiko Hamada ,  Yuaki Shin ,  Takashi Ishiguro

    IPC分类号： B41M5/26 ,  G11B7/24 ,  G11B7/254 ,  G11B7/257

    CPC分类号： G11B7/2575 ,  G11B7/2542 ,  G11B2007/24312 ,  G11B2007/24316 ,  G11B7/246 ,  G11B7/2472 ,  G11B7/248 ,  G11B7/249 ,  G11B7/252 ,  G11B7/2534 ,  Y10S430/146 ,  Y10S430/151

    摘要： An optical information recording medium comprising a substrate, an optical recording layer formed over the surface of the substrate, and a protective layer covering the optical recording layer. The protective layer incorporates an antireflection means, such as a laser beam absorbing means, a laser beam scattering means or a laser beam transmitting means, for preventing the reflection of a laser beam applied to the optical recording layer.An optical information recording medium of a second embodiment of the present invention, comprises a substrate, an optical recording layer formed over the surface of the substrate, a protective layer covering the optical recording layer, and a buffer layer interposed between the optical recording layer and the protective layer. At least one of the protective layer or the buffer layer incorporates at least one antireflection means, such as a laser beam absorbing means, a laser beam scattering means and a laser beam transmitting means, for preventing the reflection of a laser beam. The buffer layer facilitates precisely forming recording bits in the optical recording layer by locally deforming the optical recording layer by a laser beam.

    Optical information recording medium
    4.
    发明授权
    Optical information recording medium 失效
    光信息记录介质

    公开(公告)号：US5090009A

    公开(公告)日：1992-02-18

    申请号：US340528

    申请日：1989-04-14

    申请人： Emiko Hamada ,  Yuji Arai ,  Yuaki Shin ,  Takashi Ishiguro

    发明人： Emiko Hamada ,  Yuji Arai ,  Yuaki Shin ,  Takashi Ishiguro

    IPC分类号： G11B7/0045 ,  G11B7/24

    CPC分类号： G11B7/24 ,  G11B7/00452

    摘要： An optical information recording medium comprising a light transmitting substrate, a light absorptive layer overlaying the substrate to absorb a laser beam and a light reflective layer overlaying the light absorptive layer, wherein an optical parameter represented by .rho.=n.sub.abs d.sub.abs /.lambda. where n.sub.abs is the real part of the complex refractive index of the light absorptive layer, d.sub.abs is the thickness of the light absorptive layer and .lambda. is the wavelength of a reading laser beam, is 0.05.ltoreq..rho..ltoreq.0.6, and the imaginary part k.sub.abs of the complex refractive index of the light absorptive layer is at most 0.3.