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    Magnetic recording medium
    1.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5547772A

    公开(公告)日：1996-08-20

    申请号：US416331

    申请日：1995-04-04

    申请人： Shinji Saito ,  Hiroshi Ogawa ,  Takeshi Kakuta ,  Hitoshi Noguchi

    发明人： Shinji Saito ,  Hiroshi Ogawa ,  Takeshi Kakuta ,  Hitoshi Noguchi

    IPC分类号： G11B5/706 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/714 ,  G11B5/716 ,  G11B5/66 ,  B32B3/10 ,  B32B5/16

    CPC分类号： G11B5/716 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

    摘要： The present invention is directed to a magnetic recording medium comprising a non-magnetic support having provided thereon a plurality of magnetic layers composed of a lower magnetic layer comprising a ferromagnetic powder and a binder, and an upper magnetic layer comprising a ferromagnetic powder being provided on the lower magnetic layer, wherein the ferromagnetic powder contained in the upper magnetic layer has a length of major axis not longer than 0.30 .mu.m and a crystallite size not larger than 400 .ANG., the upper magnetic layer has a dry thickness of not more than 1.20 .mu.m, and the surface of the upper magnetic layer has a center-line average surface roughness (Ra) not more than 0.015 .mu.m.

    摘要翻译： 本发明涉及一种磁记录介质，其包括非磁性载体，其上设置有由包含铁磁性粉末和粘合剂的下部磁性层构成的多个磁性层，以及包含铁磁性粉末的上部磁性层， 所述下磁性层，其中所述上磁性层中所含的铁磁粉末的长轴长度不大于0.30μm，微晶尺寸不大于400，所述上磁性层的干厚度不大于1.20 上磁性层的表面的中心线平均表面粗糙度（Ra）不大于0.015μm。

    Optical information recording medium including a substrate, a recording layer, a layer of acrylic adhesive, and a cover layer
    2.
    发明授权
    Optical information recording medium including a substrate, a recording layer, a layer of acrylic adhesive, and a cover layer 失效
    光学信息记录介质，包括基底，记录层，丙烯酸粘合剂层和覆盖层

    公开(公告)号：US07051348B2

    公开(公告)日：2006-05-23

    申请号：US10329757

    申请日：2002-12-27

    申请人： Toshio Ishida ,  Shinji Saito ,  Takeshi Kakuta

    发明人： Toshio Ishida ,  Shinji Saito ,  Takeshi Kakuta

    IPC分类号： G11B7/24 ,  G11B23/03

    CPC分类号： B32B3/02 ,  G11B7/24024 ,  G11B7/246 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/256 ,  G11B7/259 ,  G11B7/26

    摘要： The invention provides an optical information recording medium, for use with a laser irradiating a laser beam having a wavelength of 380 to 500 nm through an objective lens with a numerical aperture of at least 0.7, the optical information recording medium comprising, in the following order: a substrate; a recording layer; a layer of acrylic adhesive; and a cover layer. A light reflecting layer may be provided between the substrate and the recording layer. Also a cover layer formed by an acrylic adhesive material may be provided instead of the layer of the acrylic adhesive material and the cover layer.

    摘要翻译： 本发明提供了一种光学信息记录介质，用于通过具有至少0.7的数值孔径的物镜激光照射波长为380-500nm的激光束，所述光学信息记录介质按以下顺序包括 ：底物 记录层; 一层丙烯酸粘合剂; 和覆盖层。 可以在基板和记录层之间设置光反射层。 还可以提供由丙烯酸粘合剂材料形成的覆盖层代替丙烯酸粘合剂材料层和覆盖层。

    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：US06869656B2

    公开(公告)日：2005-03-22

    申请号：US10305978

    申请日：2002-11-29

    申请人： Toshio Ishida ,  Takeshi Kakuta ,  Shinji Saito

    发明人： Toshio Ishida ,  Takeshi Kakuta ,  Shinji Saito

    IPC分类号： G11B7/24 ,  B32B3/02 ,  G11B7/135 ,  G11B7/244 ,  G11B7/248

    CPC分类号： G11B7/248 ,  Y10T428/21

    摘要： An optical information recording medium including a substrate, a recording layer, and a cover layer in this order; wherein information is recorded or reproduced by irradiating a laser beam having an wavelength in the range of 380 to 500 nm on the recording layer through a lens having a numerical aperture NA of 0.7 or more; the recording layer includes an organic substance; and the extinction coefficient k of the recording layer is at least 0.1 and less than 0.3.

    摘要翻译： 依次包括基板，记录层和覆盖层的光学信息记录介质; 其中通过使数值孔径NA为0.7以上的透镜在记录层上照射380〜500nm范围的波长的激光，来记录或再现信息; 记录层包括有机物质; 并且记录层的消光系数k至少为0.1且小于0.3。

    Optical information recording medium
    5.
    发明授权
    Optical information recording medium 失效
    光信息记录介质

    公开(公告)号：US07341820B2

    公开(公告)日：2008-03-11

    申请号：US10305976

    申请日：2002-11-29

    申请人： Toshio Ishida ,  Takeshi Kakuta ,  Shinji Saito

    发明人： Toshio Ishida ,  Takeshi Kakuta ,  Shinji Saito

    IPC分类号： G11B7/24

    CPC分类号： G11B7/257 ,  G11B7/244 ,  G11B7/248 ,  Y10S430/146

    摘要： The present invention is an optical information recording medium comprising a substrate having disposed in an order thereon a recording layer, an interlayer, and a cover layer, wherein recording and reproduction are carried out by the irradiation with a laser light having a wavelength in the range of 380 to 500 nm through a lens having a lens numerical aperture NA of 0.7 or more, wherein the recording layer is a layer of an organic substance and the thickness of the interlayer is within a range of 1 nm to 9 nm.

    摘要翻译： 本发明是一种光学信息记录介质，其包括在其上依次设置有记录层，中间层和覆盖层的基板，其中通过用波长在该范围内的激光进行照射来进行记录和再现 通过透镜数值孔径NA为0.7以上的透镜，其中记录层为有机物质层，中间层的厚度在1nm〜9nm的范围内。

    Magnetic recording medium and magnetic tape cassette mounted with the magnetic recording medium
    6.
    发明授权
    Magnetic recording medium and magnetic tape cassette mounted with the magnetic recording medium 失效
    磁记录介质和安装有磁记录介质的磁带盒

    公开(公告)号：US5436055A

    公开(公告)日：1995-07-25

    申请号：US37396

    申请日：1993-03-26

    申请人： Takeshi Kakuta ,  Shinji Saito ,  Kazuo Kato ,  Noburo Hibino

    发明人： Takeshi Kakuta ,  Shinji Saito ,  Kazuo Kato ,  Noburo Hibino

    IPC分类号： G11B23/087 ,  C09D5/23 ,  C09D7/12 ,  G11B5/73 ,  G11B5/733 ,  G11B5/738 ,  B32B3/10 ,  G11B5/66 ,  G11B15/00

    CPC分类号： G11B5/738 ,  G11B5/733 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259

    摘要： A magnetic recording medium and a magnetic tape cassette are disclosed, comprising a non-magnetic support having formed on one surface only thereof at least two layers including a lower layer and an upper magnetic layer formed thereon, wherein the surface electric resistance (Rs) of the surface of the magnetic layer of said magnetic recording medium is 10.sup.9 .OMEGA./sq or less, the non-magnetic support contains at least three different kinds of particles which vary from each other in at least one property of mean particle diameter and Mohs' hardness, and the opposite surface of the magnetic recording medium comprises the rear surface of the nonmagnetic support having at least 1,000 projections having a height of from 200 nm to 400 nm per 0.1 mm.sup.2, but with the provisos that not more than 1,000 projections are present having a height of from 400 nm to 700 nm per 0.1 mm.sup.2 and not more than 50 projections are present having a height of 700 nm or more per 0.1 mm.sup.2.

    摘要翻译： 公开了一种磁记录介质和磁带盒，其包括非磁性载体，其仅在一个表面上形成有至少两层，包括形成在其上的下层和上磁性层，其中，表面电阻（Rs）为 所述磁记录介质的磁性层的表面为109欧姆/平方厘米或更小，非磁性载体包含至少三种不同的颗粒，它们在平均粒径和莫氏硬度的至少一个性质中彼此不同 磁记录介质的相对表面包括具有至少1,000个突起的非磁性载体的后表面，其具有每0.1mm 2的200nm至400nm的高度，但条件是存在不超过1,000个突起， 存在每0.1mm 2 400nm至700nm以上且不超过50个突起的高度，每0.1mm 2具有700nm以上的高度。

    Optical information recording medium
    7.
    发明授权
    Optical information recording medium 失效
    光信息记录介质

    公开(公告)号：US07129019B2

    公开(公告)日：2006-10-31

    申请号：US10176088

    申请日：2002-06-21

    申请人： Takeshi Kakuta ,  Shinji Saito ,  Toshio Ishida ,  Takako Ozawa ,  Hiroaki Doushita

    发明人： Takeshi Kakuta ,  Shinji Saito ,  Toshio Ishida ,  Takako Ozawa ,  Hiroaki Doushita

    IPC分类号： G11B7/24

    CPC分类号： G11B7/26 ,  G11B7/24 ,  G11B7/24079 ,  G11B7/246 ,  G11B7/2467 ,  G11B7/2472 ,  G11B7/2478 ,  G11B7/248 ,  G11B7/2532 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2535 ,  G11B7/259 ,  Y10S430/146

    摘要： The present invention provides an optical information recording medium that includes a substrate including a groove with a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm and having successively disposed thereon a light reflecting layer, a recording layer containing a dye in which information is recorded by irradiation with a laser beam having a wavelength of no greater than 450 nm, an adhesive layer, and a cover layer with a thickness of 0.01 to 0.5 mm. A surface of the optical information recording medium on a side disposed with the cover layer has a center surface average roughness (SRa1) of no greater than 3.0 nm when measured over a large surface area and a center surface average roughness (SRa2) of no greater than 3.0 nm when measured over a minute surface area.

    摘要翻译： 本发明提供一种光信息记录介质，其包括：基板，其具有轨道间距为200〜400nm，槽深为20〜150nm的槽，并且依次配置有光反射层，含有染料的记录层 其中通过用波长不大于450nm的激光束照射信息，粘合剂层和厚度为0.01至0.5mm的覆盖层来记录信息。 在覆盖层的一侧的光信息记录介质的表面在大面积测定时的中心面平均粗糙度（SRa 1）为3.0nm以下，中心面平均粗糙度（SRa 2）为 在一分钟的表面积下测量时不大于3.0nm。

    Magnetic disk
    9.
    发明授权
    Magnetic disk 失效

    公开(公告)号：US06576322B2

    公开(公告)日：2003-06-10

    申请号：US09997871

    申请日：2001-11-29

    申请人： Shinji Saito ,  Takeshi Kakuta

    发明人： Shinji Saito ,  Takeshi Kakuta

    IPC分类号： G11B5708

    CPC分类号： B82Y15/00 ,  G11B5/70 ,  Y10T428/24355 ,  Y10T428/24975 ,  Y10T428/25

    摘要： A magnetic disk comprises a support, a substantially non-magnetic lower layer, and a magnetic layer containing at least one of a ferromagnetic metal powder and a hexagonal ferrite powder and a binder, wherein the magnetic layer has a thickness of 0.02 &mgr;m to 0.5 &mgr;m, a surface having a ten-point mean height Rz measured by a non-contact surface roughness profiler of 20 nm to 50 nm, and a number of projections having a height of at least 20 nm measured by AFM of 1×105/mm2 to 2×106/mm2.

    Optical recording medium and cover sheet for optical recording media
    10.
    发明申请
    Optical recording medium and cover sheet for optical recording media 审中-公开
    用于光学记录介质的光学记录介质和封面

    公开(公告)号：US20060046015A1

    公开(公告)日：2006-03-02

    申请号：US11210781

    申请日：2005-08-25

    申请人： Hiroaki Takano ,  Takeshi Kakuta

    发明人： Hiroaki Takano ,  Takeshi Kakuta

    IPC分类号： B32B3/02

    CPC分类号： G11B7/24056 ,  G11B7/24018 ,  G11B7/243 ,  G11B7/246 ,  G11B7/254

    摘要： Provided are a cover sheet for optical recording media comprising a transparent disk-shaped sheet having a central hole and a hardcoat layer formed thereon wherein the hardcoat layer has a linear crack groove in the circumferential direction in the area close to the outer circumferential edge thereof; and an optical recording medium comprising a disk-shaped substrate having a central hole and at least a recording layer, a transparent sheet, and a hardcoat layer formed in that order thereon wherein the hardcoat layer has a linear crack groove in the circumferential direction in the area close to the outer circumferential edge thereof.

    摘要翻译： 提供一种用于光学记录介质的覆盖片，其包括具有形成在其上的中心孔和硬涂层的透明盘状片，其中硬涂层在靠近其外周边缘的区域中具有在周向上的线性裂纹槽; 以及包括具有中心孔和至少记录层，透明片和依次形成的硬涂层的盘状基底的光学记录介质，其中硬涂层在圆周方向上具有线性裂纹槽 靠近其外圆周边缘的区域。