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    Magnetic transfer master carrier and magnetic transfer method
    21.
    发明授权
    Magnetic transfer master carrier and magnetic transfer method 失效
    磁传输主载体和磁转移方法

    公开(公告)号：US07974028B2

    公开(公告)日：2011-07-05

    申请号：US12411751

    申请日：2009-03-26

    申请人： Yoichi Nishida ,  Hideyuki Kubota ,  Makoto Nagao ,  Ryuji Sugita ,  Takashi Komine

    发明人： Yoichi Nishida ,  Hideyuki Kubota ,  Makoto Nagao ,  Ryuji Sugita ,  Takashi Komine

    IPC分类号： G11B5/86

    CPC分类号： G11B5/865 ,  B82Y10/00 ,  G11B5/66 ,  G11B5/743 ,  G11B5/855

    摘要： A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween.

    摘要翻译： 本发明的磁转移主载体包括在其表面上具有凸起部分的基体材料，凸起部分是与要记录在垂直磁记录介质上的信息图形相对应的，以及至少沉积在顶部的磁性层 凸部的表面，其中当向磁传递主载体施加磁场时，磁层吸收磁通量以形成磁场的图案，其中磁层包括至少两个垂直的磁各向异性层 和反铁磁耦合感应层，其被设置成夹在所有垂直磁各向异性层的两个相邻层之间，并且在它们之间引起反铁磁耦合。

    MASTER CARRIER FOR MAGNETIC TRANSFER, MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM
    23.
    发明申请
    MASTER CARRIER FOR MAGNETIC TRANSFER, MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM 审中-公开
    磁性传输主磁带，磁性传输方法和磁记录介质

    公开(公告)号：US20090073593A1

    公开(公告)日：2009-03-19

    申请号：US12208037

    申请日：2008-09-10

    申请人： Naoto FUJIWARA ,  Makoto Nagao ,  Ryuji Sugita

    发明人： Naoto FUJIWARA ,  Makoto Nagao ,  Ryuji Sugita

    IPC分类号： G11B5/86

    CPC分类号： G11B5/865 ,  G11B5/656 ,  G11B5/667

    摘要： A master carrier for magnetic transfer includes a transfer portion on which a magnetic layer corresponding to magnetic information for transfer is formed, and a non-transfer portion forming a concave shape relatively low with respect to the transfer portion having the magnetic layer, wherein the magnetic layer of the transfer portion has perpendicular magnetic anisotropy, with residual magnetization Mr of 500 emu/cc or less, and saturation magnetization Ms of 900 emu/cc or more. CoPt can be used as a material of the magnetic layer, and use of Co4Pt1 (at %) is especially preferable. Thereby, a master carrier for magnetic transfer which can generate a high magnetic field capable of transfer of a short bit to a high density medium is provided.

    摘要翻译： 用于磁转移的主载体包括其上形成有与用于传送的磁信息相对应的磁性层的转印部分和形成相对于具有磁性层的转印部分相对较低的凹形的非转印部分，其中磁性 转印部分的层具有垂直的磁各向异性，剩余磁化强度Mr为500emu / cc以下，饱和磁化强度Ms为900emu / cc以上。 CoPt可以用作磁性层的材料，特别优选使用Co4Pt1（at％）。 因此，提供了能够产生能够将短位传递到高密度介质的高磁场的用于磁转移的主载波。

    Process for producing magnetic recording medium with limited coercivity squareness ratio
    24.
    发明申请
    Process for producing magnetic recording medium with limited coercivity squareness ratio 审中-公开
    具有有限矫顽力矩形度的磁记录介质的制造方法

    公开(公告)号：US20050277000A1

    公开(公告)日：2005-12-15

    申请号：US11152156

    申请日：2005-06-15

    申请人： Makoto Nagao ,  Ryuji Sugita ,  Tadashi Yasunaga

    发明人： Makoto Nagao ,  Ryuji Sugita ,  Tadashi Yasunaga

    IPC分类号： G11B5/62 ,  G11B5/72 ,  G11B5/82 ,  G11B5/855 ,  G11B5/86 ,  G11B5/147 ,  B05D3/00

    CPC分类号： G11B5/865 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B2005/0021

    摘要： A magnetic recording medium containing a magnetic recording layer with a coercivity squareness ratio of 0.4 to 0.9 is produced by magnetic transfer, for which a magnetic field is applied to an unrecorded magnetic recording medium while maintaining a patterned side of the patterned master medium in close contact with the magnetic recording layer for magnetic transfer. At least portions of the patterned side are made of a soft-magnetic material, and the pattern formed on the patterned side has a bit length of 60 nm or smaller. It is possible to arrange the magnetic recording layer to have a coercive force of 398 kA/m or greater, reduce the bit length to 55 nm or smaller, and heat the magnetic recording layer to 100° C. or higher during application of the magnetic field.

    摘要翻译： 通过磁转移产生含有矫顽力矩形比为0.4〜0.9的磁记录层的磁记录介质，对未记录的磁记录介质施加磁场，同时保持图案化主介质的图案侧紧密接触 与磁记录层进行磁转移。 图案化侧的至少一部分由软磁性材料制成，并且在图案化侧上形成的图案具有60nm或更小的位长度。 可以使磁记录层具有398kA / m以上的矫顽力，将位长度减小到55nm以下，并且在施加磁性时将磁记录层加热到100℃以上 领域。

    Magnetic recording media fabrication method
    27.
    发明授权
    Magnetic recording media fabrication method 失效
    磁记录介质制造方法

    公开(公告)号：US5691008A

    公开(公告)日：1997-11-25

    申请号：US542420

    申请日：1995-10-12

    申请人： Kiyokazu Thoma ,  Kazunari Yoshimoto ,  Ryuji Sugita ,  Tatsuaki Ishida

    发明人： Kiyokazu Thoma ,  Kazunari Yoshimoto ,  Ryuji Sugita ,  Tatsuaki Ishida

    IPC分类号： G11B5/64 ,  G11B5/84 ,  G11B5/85 ,  C23C14/14

    CPC分类号： G11B5/656 ,  G11B5/64 ,  G11B5/84 ,  G11B5/85 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/265

    摘要： A magnetic recording medium fabrication device includes a cooling drum around which a substrate runs while being cooled thereby, an ion gun arranged upstream to a vapor deposition station for kicking out particles absorbed on the plane of the substrate, a cooling body arranged between the cooling drum and ion gun for absorbing kicked out particles and a vapor deposition means for depositing a magnetic layer on the substrate at the vapor deposition station. The magnetic particles forming the magnetic layer that have residual magnetization vectors within .+-.10.degree. of the easy axis direction including the magnetic anisotropy of the medium are greater than or equal to 70% and less than or equal to 90% of the total amount of magnetic particles.

    摘要翻译： 一种磁记录介质制造装置，包括：冷却滚筒，基板在该冷却滚筒的同时冷却，在该冷却滚筒的同时被冷却;离子枪，布置在气相沉积站的上游，用于汲取在基板的平面上吸收的颗粒;冷却体， 用于吸收被剔除的颗粒的离子枪和用于在气相沉积站上在基底上沉积磁性层的气相沉积装置。 形成磁性层的磁性粒子在容易轴方向的+/- 10°以内的残留磁化强度包括介质的磁各向异性大于或等于总量的70％且小于或等于90％ 的磁性颗粒。

    Method and apparatus for producing magnetic recording medium
    28.
    发明授权
    Method and apparatus for producing magnetic recording medium 失效
    制造磁记录介质的方法和装置

    公开(公告)号：US5472506A

    公开(公告)日：1995-12-05

    申请号：US367998

    申请日：1995-01-03

    申请人： Kiyokazu Tohma ,  Ryuji Sugita ,  Tatsuaki Ishida ,  Yasuaki Ban

    发明人： Kiyokazu Tohma ,  Ryuji Sugita ,  Tatsuaki Ishida ,  Yasuaki Ban

    IPC分类号： G11B5/85 ,  C23C14/00

    CPC分类号： G11B5/85

    摘要： A magnetic recording medium having good high density recording characteristics is produced by forming a magnetic layer on a substrate which is traveling around a peripheral surface of a cylindrical can by an oblique vapor deposition method to form a magnetic layer comprising cobalt, an axis of easy magnetization of which inclined from a line normal to the layer plane. A residual gas pressure in an initial region of the formation of the magnetic layer is kept as low as possible, in particular, the residual gas pressure in the initial region of the formation of the magnetic layer is lower than in the other part of the production apparatus.

    摘要翻译： 具有良好高密度记录特性的磁记录介质通过在通过倾斜气相沉积法绕圆筒形罐的周面行进的基板上形成磁性层来形成包含钴的磁性层，易磁化轴 其从垂直于层平面的线倾斜。 形成磁性层的初始区域中的残留气体压力尽可能地保持低，特别是形成磁性层的初始区域中的残余气体压力低于制造的其它部分 仪器。