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23 条记录 (耗时 0.013 秒)

    Magneto-optical recording medium
    2.
    发明申请
    Magneto-optical recording medium 失效
    磁光记录介质

    公开(公告)号：US20050030837A1

    公开(公告)日：2005-02-10

    申请号：US10488386

    申请日：2003-07-04

    申请人： Takeshi Miki ,  Goro Fujita

    发明人： Takeshi Miki ,  Goro Fujita

    IPC分类号： G11B7/007 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B11/10584 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/10578

    摘要： A magneto-optical recording medium in which the inside of grooves formed along recording tracks is a signal recording area in groove recording, and the domain wall displacement detection method is employed; and a curvature radius R1, in the cross section perpendicular to the recording tracks, of a shoulder portion of a land separating the grooves that is adjacent to the groove is 30 nm or less and a curvature radius R2, in the cross section perpendicular to the recording tracks, of the inside edge portion of the groove for the recording that is adjacent to the land is 20 nm or more, so that a wide recording power margin can be obtained, the jitter can be improved, and the error rate can also be improved.

    摘要翻译： 一种磁光记录介质，其中沿着记录轨道形成的凹槽的内部是沟槽记录中的信号记录区域，并且采用畴壁位移检测方法; 并且在垂直于记录轨道的横截面中的与凹槽相邻的凹槽的肩部的肩部的曲率半径R1在与该凹槽相邻的横截面中为30nm以下且曲率半径R2为 用于与岸台相邻的记录的槽的内边缘部分的记录轨迹为20nm以上，从而可以获得宽的记录功率余量，可以提高抖动，并且错误率也可以是 改进。

    Information recording medium
    3.
    发明授权
    Information recording medium 失效
    信息记录媒体

    公开(公告)号：US5216665A

    公开(公告)日：1993-06-01

    申请号：US458365

    申请日：1989-12-28

    申请人： Hiroyuki Imataki

    发明人： Hiroyuki Imataki

    IPC分类号： G11B7/0025 ,  G11B7/005 ,  G11B7/007 ,  G11B7/24 ,  G11B7/24012 ,  G11B7/24076 ,  G11B7/24079

    CPC分类号： G11B7/24076 ,  G11B7/0025 ,  G11B7/0051 ,  G11B7/24 ,  G11B7/24079 ,  G11B7/24012

    摘要： An optical recording medium is formed by applying a coating liquid to form a light-reflecting layer on a substrate having a surface provided with a pre-format pattern comprising a concavity and a convexity. The concavity is designed to have a sectional shape of a trapezoid having a pair of parallel opposite sides, a shorter one of which constitutes the bottom of the concavity, and a pair of sloping sides. Each sloping side forms a (solid part) angle .theta. of not larger than 35 degrees with respect to the extension of the substrate surface. The concavity has a depth d larger than .lambda./4n wherein .lambda. is the wavelength of an optical radiation beam with which the optical recording medium is illuminated for recording and/or reproduction and n is the refractive index of the substrate.

    Optical card
    5.
    发明授权
    Optical card 失效
    光卡

    公开(公告)号：US5979772A

    公开(公告)日：1999-11-09

    申请号：US930058

    申请日：1997-11-20

    申请人： Jiro Takei ,  Yoshihiro Azuma

    发明人： Jiro Takei ,  Yoshihiro Azuma

    IPC分类号： G11B7/0033 ,  G11B7/007 ,  G11B7/24 ,  G11B7/24076 ,  G11B7/26

    CPC分类号： G11B7/24076 ,  G11B7/24 ,  G11B7/26 ,  G11B7/0033 ,  G11B7/00745

    摘要： This invention relates to an optical card having a preformat portion comprising a low reflectance area having an excellent contrast to high reflectance area. An optical card original plate whose portions corresponding to preformat portions 4, 5 of an optical card 1 each have a stereostructure of an inverted pyramidal shape is prepared. An optical card is duplicated from this optical card original plate. The stereostructure in an inverted pyramidal shape can be formed by the anisotropic etching of a single crystal substrate. An original plate free from defects and surface roughnesses and ensuring a sufficiently low reflectance is obtained. An optical card produced from this original plate has a preformat portion comprising a low reflectance area with a satisfactory contrast to a high reflectance area. A replica duplicated using a molding resin from the original plate can be used as a resin original plate. Furthermore, a replica duplicated from this resin original plate by use of a molding resin can be used as a stamper for production of an optical card.

    摘要翻译： PCT No.PCT / JP97 / 00935 Sec。 371日期：1997年11月20日 102（e）1997年11月20日日期PCT 1997年3月21日PCT公布。 第WO97 / 36293号公报 日期1997年10月2日本发明涉及一种光卡，其具有包括与高反射率区域具有优异对比度的低反射率区域的预格式化部分。 准备与光卡1的预格式化部分4,5相对应的光卡原版，各自具有倒锥形的立体结构。 光卡从该光卡原版复制。 倒立金字塔形状的立体结构可以通过单晶基板的各向异性蚀刻形成。 获得没有缺陷和表面粗糙度并确保足够低反射率的原版。 由该原版产生的光卡具有包含低反射率区域的预格式化部分，与高反射率区域具有令人满意的对比度。 使用原版的成型树脂复制的复制品可以用作树脂原版。 此外，可以使用通过使用模制树脂从该树脂原版复制的复制品作为制造光卡的压模。

    Information recording medium and method for recording and reproducing thereof
    6.
    发明授权
    Information recording medium and method for recording and reproducing thereof 失效
    信息记录介质及其记录和再现方法

    公开(公告)号：US5682375A

    公开(公告)日：1997-10-28

    申请号：US505912

    申请日：1995-07-24

    申请人： Hiroyuki Imataki

    发明人： Hiroyuki Imataki

    IPC分类号： G11B7/0033 ,  G11B7/007 ,  G11B7/013 ,  G11B7/24076 ,  G11B7/24079 ,  G11B7/24085 ,  G11B7/26 ,  G11B7/24

    CPC分类号： G11B7/26 ,  G11B7/0033 ,  G11B7/007 ,  G11B7/24076 ,  G11B7/24079 ,  G11B7/24085

    摘要： Disclosed herein is an information recording medium to be illuminated with an optical radiation beam, comprising a substrate having a surface provided with a preformat comprising a servo track and forming a sectional shape, in transverse to the track, which comprises a concavity provided between two convexities, each having a flat top, and a light reflecting layer being formed by application of a coating liquid over the surface of the substrate, wherein the concavity has the sectional shape of an open trapezoid having a rectangular part, the trapezoidal part has a pair of parallel opposite sides and a pair of sloping sides constituting walls of the trapezoidal part, one of the parallel sides constituting the bottom of the trapezoidal part being shorter than the opposite side, and the rectangular part is adjacent to the side constituting the bottom of the trapezoidal part.

    摘要翻译： 本文公开了一种用光辐射束照明的信息记录介质，包括具有设置有包括伺服轨道并形成横截面的截面形状的预定格式的表面的基板，其包括设置在两个凸部之间的凹部 每个具有平坦的顶部，并且通过在基板的表面上施加涂布液形成光反射层，其中凹部具有矩形部分的开放梯形的截面形状，梯形部分具有一对 平行的相对侧和构成梯形部分的壁的一对倾斜侧，构成梯形部分的底部的平行侧中的一个比相对侧短，并且矩形部分与构成梯形的底部的一侧相邻 部分。

    Optical data recording medium and manufacturing method thereof
    8.
    发明授权
    Optical data recording medium and manufacturing method thereof 失效
    光学数据记录介质及其制造方法

    公开(公告)号：US5904969A

    公开(公告)日：1999-05-18

    申请号：US677583

    申请日：1996-07-05

    申请人： Hisamitsu Kamezaki ,  Yoshiaki Minagawa ,  Kazuya Fukunaga

    发明人： Hisamitsu Kamezaki ,  Yoshiaki Minagawa ,  Kazuya Fukunaga

    IPC分类号： G11B7/007 ,  G11B7/24 ,  G11B7/24076 ,  G11B7/26 ,  B32B3/00

    CPC分类号： G11B7/24 ,  G11B7/24076 ,  G11B7/261 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

    摘要： A desired writable optical data recording medium has a transparent substrate 1 where a side wall of a recess is connected to a land surface by a curved surface. A data recording portion of a dye material may be placed only in recesses of a pre-formatted pattern on a transparent substrate, and a reflective layer may be formed on the data recording portion and on the exposed land area between neighboring recesses. The medium can show reflectivity of not less than 65% on reproduction and reduce the cost for manufacturing thereof.

    摘要翻译： 期望的可写入光学数据记录介质具有透明基板1，其中凹部的侧壁通过曲面连接到台面。 染料材料的数据记录部分可以仅放置在透明基板上的预格式图案的凹部中，并且反射层可以形成在数据记录部分和相邻凹部之间的暴露的区域上。 该介质可以显示不少于65％的反射率，并且降低其制造成本。