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    Protecting film for optical recording medium and optical recording medium
    2.
    发明申请
    Protecting film for optical recording medium and optical recording medium 审中-公开
    保护胶片用于光记录介质和光记录介质

    公开(公告)号：US20050007944A1

    公开(公告)日：2005-01-13

    申请号：US10902051

    申请日：2004-07-30

    申请人： Akihiko Uchiyama ,  Takashi Kushida ,  Masakazu Tsujikura

    发明人： Akihiko Uchiyama ,  Takashi Kushida ,  Masakazu Tsujikura

    IPC分类号： G11B7/24056 ,  G11B7/244 ,  G11B7/253 ,  G11B7/254 ,  G11B7/2542 ,  G11B7/24 ,  G11B11/00

    CPC分类号： G11B7/24056 ,  G11B7/244 ,  G11B7/253 ,  G11B7/254 ,  G11B7/2542

    摘要： An optical recording medium protecting film which is a protecting film comprising a single transparent film made of a thermoplastic resin, having a retardation of no greater than 15 nm at a wavelength of 550 nm and a K value of no greater than 40 nm at 550 nm, having a glass transition temperature of 120° C. or higher and a water absorption of no greater than 1 wt %. |R(550)|≦15 nm  (1) |K(550)|≦40 nm  (2) (the K value being calculated by K=[nz−(nx+ny)/2]×d {where nx, ny and nz are the three-dimensional refractive indexes of the transparent film in the x-axis, y-axis and z-axis directions, respectively, and d is the thickness of the transparent film}). Also, an optical recording medium having a data recording layer and the above-mentioned protecting film on a substrate, wherein light is incident from the protecting film side.

    摘要翻译： 作为保护膜的光记录介质保护膜，其包含由热塑性树脂制成的单一透明膜，在550nm波长处具有不大于15nm的延迟并且在550nm处具有不大于40nm的K值 ，玻璃化转变温度为120℃以上，吸水率为1重量％以下。 | R（550）| <= 15nm（1）| K（550）| <= 40nm（2）（K值由K = [nz-（nx + ny）/ 2] xd {其中nx，ny nz分别是x轴，y轴和z轴方向上的透明膜的三维折射率，d是透明膜的厚度}}。 另外，在基板上具有数据记录层和上述保护膜的光记录介质，其中光从保护膜侧入射。

    Optical information recording medium
    10.
    发明申请
    Optical information recording medium 有权
    光信息记录介质

    公开(公告)号：US20050132395A1

    公开(公告)日：2005-06-16

    申请号：US10980267

    申请日：2004-11-04

    申请人： Kazuya Hisada ,  Eiji Ohno ,  Keiji Nishikiori

    发明人： Kazuya Hisada ,  Eiji Ohno ,  Keiji Nishikiori

    IPC分类号： G11B7/005 ,  G11B7/24056 ,  G11B7/24097 ,  G11B7/2534 ,  G11B7/2545 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B11/10 ,  G11B13/00 ,  G11B23/03 ,  G11B7/24

    CPC分类号： G11B7/24056 ,  G11B7/24097 ,  G11B7/2534 ,  G11B7/2545 ,  G11B7/2585 ,  G11B7/259

    摘要： The object of the present invention is to provide an optical information recording medium which has tolerance to warping. To achieve the object above, an optical information recording medium 100 of the present invention includes at least one information recording layer 103 on a main surface of a substrate 101 and a light-transmitting layer 106. The substrate 101 includes a clamp area 105 and an information recording area 104 in accordance with the information recording layer 103. In the light-transmitting layer 106, the average thickness of a second area 106b corresponding to the clamp area 105 is thinner than the average thickness of a first area 106a corresponding to the information recording area 104.

    摘要翻译： 本发明的目的是提供一种具有扭曲公差的光学信息记录介质。 为了实现上述目的，本发明的光信息记录介质100包括在基板101的主表面上的至少一个信息记录层103和透光层106。 基板101包括根据信息记录层103的夹持区域105和信息记录区域104。 在透光层106中，对应于夹持区域105的第二区域106b的平均厚度比对应于信息记录区域104的第一区域106a的平均厚度薄。