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    PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING LOW MEDIUM NOISE AND SYSTEMS USING THE SAME
    34.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING LOW MEDIUM NOISE AND SYSTEMS USING THE SAME 有权
    具有低介质噪声和系统的全磁性记录介质

    公开(公告)号：US20120154948A1

    公开(公告)日：2012-06-21

    申请号：US12975197

    申请日：2010-12-21

    申请人： Ichiro Tamai ,  Yotsuo Yahisa ,  Akemi Hirotsune ,  Kiwamu Tanahashi

    发明人： Ichiro Tamai ,  Yotsuo Yahisa ,  Akemi Hirotsune ,  Kiwamu Tanahashi

    IPC分类号： G11B5/667 ,  G11B5/62 ,  G11B21/02

    CPC分类号： G11B5/65 ,  G11B5/667 ,  G11B5/732 ,  G11B5/7325

    摘要： In one embodiment, a perpendicular magnetic recording medium includes a substrate, a soft-magnetic underlayer above the substrate, a seed layer above the soft-magnetic underlayer, a first intermediate layer above the seed layer, a second intermediate layer above the first intermediate layer, a recording layer above the second intermediate layer, and a protective layer above the recording layer. The second intermediate layer includes an Ru alloy having an element selected from a group consisting of: Ti in a range from about 20 at. % to about 50 at. %, Nb in a range from about 20 at. % to about 50 at. %, Al in a range from about 20 at. % to about 40 at. %, Ta in a range from about 30 at. % to about 50 at. %, and Si in a range about 20 at. % to about 40 at. %. Other magnetic media and systems using this media are described according to more embodiments.

    摘要翻译： 在一个实施例中，垂直磁记录介质包括基底，在基底上方的软磁性底层，软磁性底层上方的晶种层，种子层上方的第一中间层，第一中间层上方的第二中间层 ，第二中间层上方的记录层和记录层上方的保护层。 第二中间层包括具有选自以下的元素的Ru合金：Ti为约20at。 ％至约50。 ％，Nb在约20英寸的范围内。 ％至约50。 ％，Al在约20英寸的范围内。 ％至约40 at。 ％，Ta在约30 at范围内。 ％至约50。 ％，Si在约20at。 ％至约40 at。 ％。 根据更多实施例描述使用该介质的其它磁性介质和系统。

    Method for manufacturing a magnetic medium
    35.
    发明授权
    Method for manufacturing a magnetic medium 有权
    磁介质的制造方法

    公开(公告)号：US07249405B2

    公开(公告)日：2007-07-31

    申请号：US11062652

    申请日：2005-02-23

    申请人： Yoshio Takahashi ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama

    发明人： Yoshio Takahashi ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama

    IPC分类号： G11B5/127 ,  H04R31/00

    CPC分类号： G11B5/732 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/8404 ,  Y10T29/49021 ,  Y10T29/49025 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49078 ,  Y10T29/49224 ,  Y10T428/12465 ,  Y10T428/12757 ,  Y10T428/24355 ,  Y10T428/31

    摘要： Disclosed is a magnetic recording medium and a method for manufacturing the same to provide a magnetic recording medium reducing medium noise and having excellent thermal stability. The magnetic recording medium includes a substantially amorphous seed layer and a polycrystal underlayer made of crystal grains having a substantially columnar structure, the polycrystal underlayer contacting thereto. In a boundary between the seed layer and the underlayer, fine grooves having a period up to as large as the magnetic layer crystal grain diameter are formed in the disc circumferential direction. Accordingly, the magnetic recording medium is allowed to have a grain shape with a value obtained by dividing the average grain diameter for the disc circumferential direction by the average grain diameter for the disc radial direction of no less than 0.5 and no more than 0.9, thus achieving simultaneously reduction of the medium noise and thermal stability.

    摘要翻译： 公开了一种磁记录介质及其制造方法，以提供磁记录介质降低介质噪声并具有优异的热稳定性。 磁记录介质包括基本上无定形的种子层和由具有基本上柱状结构的晶粒制成的多晶底层，多晶底层与其接触。 在种子层和底层之间的边界处，在盘周向形成有具有与磁性层晶粒直径一样大的周期的细槽。 因此，使磁记录介质具有通过将盘圆周方向的平均粒径除以盘径向的平均粒径为不小于0.5且不大于0.9而获得的值的晶粒形状，因此 实现中等噪声和热稳定性的同时降低。

    Magnetic recording medium, process for producing the same and magnetic recording system
    38.
    发明授权
    Magnetic recording medium, process for producing the same and magnetic recording system 失效
    磁记录介质，制造过程及磁记录系统

    公开(公告)号：US5815343A

    公开(公告)日：1998-09-29

    申请号：US967346

    申请日：1997-10-27

    申请人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

    发明人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

    IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/62 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/78 ,  G11B5/82 ,  G11B17/00

    CPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

    摘要： A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.

    摘要翻译： 磁记录介质包括非磁性衬底和设置在非磁性衬底上的磁性层。 在记录方向上确定的磁性层的剩余磁通密度Br1和磁性层的厚度δ的乘积Br1δ的值不小于5Gm且不大于180Gm; 在平行于基板平面并垂直于记录方向Br1 / Br2的方向上确定的Br1与剩余通量密度Br2的比值不小于1.3且不大于3; 非磁性基板的表面具有主要在记录方向上延伸的织构槽; 并且在垂直于基板平面并垂直于记录方向的方向上确定的磁性层的表面的平均粗糙度Ra不小于0.3nm且不大于1.9nm。 或者，在记录方向上确定的磁性层的剩余磁通密度Br和磁性层的厚度δ的乘积Br delta的值不小于5Gm且不大于80Gm; 并且磁记录介质的各向异性磁场Hk的值不小于7kOe且不大于20kOe。

    Perpendicular magnetic recording medium and magnetic storage apparatus using the same
    39.
    发明授权
    Perpendicular magnetic recording medium and magnetic storage apparatus using the same 有权
    垂直磁记录介质及使用其的磁存储装置

    公开(公告)号：US08703307B2

    公开(公告)日：2014-04-22

    申请号：US12903135

    申请日：2010-10-12

    申请人： Akemi Hirotsune ,  Yotsuo Yahisa ,  Ichiro Tamai

    发明人： Akemi Hirotsune ,  Yotsuo Yahisa ,  Ichiro Tamai

    IPC分类号： G11B5/66

    CPC分类号： G11B5/82 ,  G11B5/732 ,  G11B5/7325

    摘要： According to one embodiment, a perpendicular magnetic recording medium includes a soft magnetic underlayer formed above a substrate, a lower seed layer formed above the soft magnetic underlayer, at least one upper seed layer formed above the lower seed layer, an interlayer formed above the at least one upper seed layer, a perpendicular recording layer formed above the interlayer, and a protective layer formed above the perpendicular recording layer, wherein the at least one upper seed layer comprises Ni or a Ni based alloy including N, and wherein the lower seed layer includes Ni and at least one element selected from a group consisting of: W and Cr. Other embodiments are described herein regarding perpendicular magnetic recording systems and methods of producing perpendicular magnetic media.

    摘要翻译： 根据一个实施例，垂直磁记录介质包括形成在基底上方的软磁性底层，形成在软磁性底层上方的下部种子层，形成在下部种子层上方的至少一个上部种子层， 至少一个上部种子层，形成在中间层上方的垂直记录层和形成在垂直记录层上方的保护层，其中至少一个上部种子层包含Ni或包含N的Ni基合金，并且其中下部种子层 包括Ni和选自由W和Cr组成的组中的至少一种元素。 本文描述了关于垂直磁记录系统和产生垂直磁性介质的方法的其它实施例。

    PERPENDICULAR MAGNETIC RECORDING MEDIUM (PMRM) AND SYSTEMS THEREOF
    40.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM (PMRM) AND SYSTEMS THEREOF 审中-公开
    全能磁记录介质（PMRM）及其系统

    公开(公告)号：US20120099220A1

    公开(公告)日：2012-04-26

    申请号：US12909783

    申请日：2010-10-21

    申请人： Ichiro Tamai ,  Yotsuo Yahisa ,  Akemi Hirotsune

    发明人： Ichiro Tamai ,  Yotsuo Yahisa ,  Akemi Hirotsune

    IPC分类号： G11B21/02 ,  B05D5/12 ,  G11B5/706

    CPC分类号： G11B5/7325 ,  G11B5/7379

    摘要： In one embodiment, a perpendicular magnetic recording medium includes a crystalline seed layer having a pseudo-hcp structure with stacking faults formed above a soft magnetic underlayer, a first interlayer comprising Ru and one of W, Ta, Mo, and Nb formed above the crystalline seed layer, a second interlayer formed above the first interlayer, and a magnetic recording layer formed above the second interlayer. The first interlayer has a W concentration between about 32 at % and 50 at %, Mo in a concentration between about 36 at % and 52 at %, Ta in a concentration between about 20 at % and 30 at %, or Nb in a concentration between about 7 at % and 30 at %. In another embodiment, a system includes a recording medium as described above, a magnetic head for reading from and/or writing to the medium, a head slider for supporting the head, and a control unit coupled to the head.

    摘要翻译： 在一个实施例中，垂直磁记录介质包括具有形成在软磁性底层上方的堆垛层错的伪hcp结构的结晶种子层，包含Ru和在晶体上形成的W，Ta，Mo和Nb中的一个的第一中间层 晶种层，形成在第一中间层上方的第二中间层和形成在第二中间层上方的磁记录层。 第一中间层具有约32at％至50at％的W浓度，浓度在约36at％至52at％之间的Mo，浓度在约20at％至30at％之间的Ta或浓度为Nb 在约7at％和30at％之间。 在另一个实施例中，系统包括如上所述的记录介质，用于从介质读取和/或写入介质的磁头，用于支撑磁头的磁头滑块以及耦合到磁头的控制单元。