公开(公告)号：US20060127703A1

公开(公告)日：2006-06-15

申请号：US11295005

申请日：2005-12-05

申请人： Ikuko Takekuma ,  Reiko Arai ,  Yoko Ogawa ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Tomio Iwasaki

发明人： Ikuko Takekuma ,  Reiko Arai ,  Yoko Ogawa ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Tomio Iwasaki

IPC分类号： G11B5/66 ,  C23C14/00

CPC分类号： C23C14/568 ,  C23C14/025 ,  C23C14/0658 ,  C23C14/0688 ,  C23C14/584 ,  G11B5/65 ,  G11B5/732

摘要： Embodiments of the invention provide a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, a magnetic recording layer and an overcoat layer which are stacked over a substrate in order, the magnetic recording layer has a granular structure which consists of many columnar grains of CoCrPt alloy and a grain boundary layer containing an oxide, the seed layer is made of TaNi alloy or TaTi alloy and the intermediate layer is made of Ru or Ru alloy which contains about 80 at. % Ru or more.

摘要翻译： 本发明的实施方案提供了提供高介质S / N和良好耐腐蚀性的介质。 根据一个实施例，在依次层叠在基板上的至少包括软磁性底层，种子层，中间层，磁记录层和覆盖层的垂直磁记录介质中，磁记录层具有 由CoCrPt合金的许多柱状晶粒和含有氧化物的晶界层组成的粒状结构，种子层由TaNi合金或TaTi合金制成，中间层由含有约80at的Ru或Ru合金制成。 ％Ru或更多。

公开(公告)号：US20060019124A1

公开(公告)日：2006-01-26

申请号：US11186931

申请日：2005-07-22

申请人： Tomio Iwasaki ,  Yuzuru Hosoe

发明人： Tomio Iwasaki ,  Yuzuru Hosoe

IPC分类号： G11B5/66

CPC分类号： G11B5/7325

摘要： A perpendicular magnetic recording medium, comprises: a substrate; a soft-magnetic underground layer formed on one main surface of the substrate; a non-magnetic layer formed on the soft-magnetic underground layer; an intermediate layer formed on the non-magnetic layer; and a perpendicular recording layer formed on the intermediate layer, wherein an addition element is contained within the intermediate layer, for improving flatness of the surface thereof, thereby having high reliability and high functions, as well as, a magnetic recording apparatus having high reliability and high performances.

摘要翻译： 一种垂直磁记录介质，包括：基板; 形成在基板的一个主表面上的软磁地下层; 形成在软磁地下层上的非磁性层; 形成在非磁性层上的中间层; 以及形成在中间层上的垂直记录层，其中在中间层中包含添加元素，用于提高其表面的平坦度，从而具有高可靠性和高功能，以及具有高可靠性和 高性能。

公开(公告)号：US20050227120A1

公开(公告)日：2005-10-13

申请号：US11105045

申请日：2005-04-12

申请人： Takayuki Ichihara ,  Atsushi Nakamura ,  Ichiro Tamai ,  Yuzuru Hosoe

发明人： Takayuki Ichihara ,  Atsushi Nakamura ,  Ichiro Tamai ,  Yuzuru Hosoe

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  G11B5/738 ,  H01F10/16 ,  H01F10/30

CPC分类号： G11B5/667 ,  G11B5/66 ,  G11B5/7325

摘要： Embodiments of the invention provide a perpendicular magnetic recording medium capable of reconciling a high recording density with high thermal stability, and having a high write-ability while maintaining high magnetic anisotropy energy. In one embodiment, a perpendicular magnetic recording medium has a soft-magnetic underlayer, and magnetic recording layers, and the magnetic recording layers comprises a first recording layer containing magnetic grains oriented in a direction normal to a medium plane, and a second recording layer containing magnetic grains tilted in a cross-track direction. There can be provided a perpendicular magnetic recording medium resistant to thermal fluctuation, small in medium noise, and excellent in write-ability.

摘要翻译： 本发明的实施方案提供了一种垂直磁记录介质，其能够调和高记录密度和高热稳定性，并且具有高的写入能力，同时保持高的磁各向异性能量。 在一个实施例中，垂直磁记录介质具有软磁性底层和磁记录层，并且磁记录层包括含有沿垂直于介质平面的方向取向的磁性颗粒的第一记录层和含有 磁性晶粒沿横向方向倾斜。 可以提供耐热波动，中等噪声小，写入性优异的垂直磁记录介质。

公开(公告)号：US06544672B1

公开(公告)日：2003-04-08

申请号：US09678382

申请日：2000-10-03

申请人： Masaaki Futamoto ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Yuzuru Hosoe ,  Akira Ishikawa

发明人： Masaaki Futamoto ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Yuzuru Hosoe ,  Akira Ishikawa

IPC分类号： G11B566

CPC分类号： G11B5/656 ,  C22C27/06 ,  G11B5/64 ,  G11B5/66 ,  Y10S428/90

摘要： Disclosed is a magnetic recording medium capable of reducing noise and an error rate of the medium. The medium comprises a nonmagnetic substrate; a magnetic layer formed on the surface of the nonmagnetic substrate directly or through a nonmagnetic underlayer; and a protective layer formed on the magnetic layer; wherein the magnetic recording medium satisfies the following relationships: −0.5≦{Hc(1)−Hc(p)}/Hc(1)≦0.3 Hc(1)≧2 kOe 20 G×&mgr;m≦Br(1)×t≦100 G×&mgr;m where Hc(1) indicates a corecivity of the magnetic layer measured in the longitudinal direction; Hc(p) indicates a coercivity of the magnetic layer measured in the perpendicular direction; Br(1) indicates a remanent magnetization of the magnetic layer measured in the longitudinal direction; and “t” indicates a layer thickness of the magnetic layer.

摘要翻译： 公开了能够降低介质的噪声和错误率的磁记录介质。 介质包括非磁性基底; 直接或通过非磁性底层形成在非磁性基片的表面上的磁性层; 以及形成在所述磁性层上的保护层; 其中所述磁记录介质满足以下关系：其中Hc（1）表示在纵向方向上测量的磁性层的堆积率; Hc（p）表示在垂直方向测量的磁性层的矫顽力; Br（1）表示在纵向测定的磁性层的残留磁化强度; “t”表示磁性层的层厚度。

公开(公告)号：US06221508B1

公开(公告)日：2001-04-24

申请号：US09206869

申请日：1998-12-08

申请人： Tetsuya Kanbe ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshio Takahashi ,  Fumiyoshi Kirino ,  Nagatugu Koiso ,  Satoshi Matsunuma

发明人： Tetsuya Kanbe ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshio Takahashi ,  Fumiyoshi Kirino ,  Nagatugu Koiso ,  Satoshi Matsunuma

IPC分类号： C23C1500

CPC分类号： G11B5/7325 ,  C23C14/185 ,  G11B5/00 ,  G11B5/012 ,  G11B2005/001 ,  G11B2005/0016 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/1107 ,  Y10T428/1121 ,  Y10T428/12507 ,  Y10T428/1266 ,  Y10T428/12667 ,  Y10T428/12674 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/12868 ,  Y10T428/12944 ,  Y10T428/265

摘要： In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section and reproduction section, means for causing the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor means for performing signal inputting to the magnetic head and for effecting reproduction of an output signal from the magnetic head, the reproduction section of said magnetic head is composed of a magnetic head of the magneto-resistance effect type, while said magnetic record medium is structured including a substrate and a magnetic layer formed thereover with one or several underlayers being sandwiched therebetween, wherein at least one of the underlayers is a specific layer that is made of amorphous or microcrystalline materials containing therein Ni as the principal or main component thereof and further containing at least one kind of element as selected from the group consisting of Nb and Ta.

摘要翻译： 在具有磁记录介质的磁存储装置中，用于以预先指定的记录方向驱动该介质的驱动单元，包括记录器部分和再现部分的磁头组件，用于使磁头相对于磁体相对移动的装置 记录介质和记录/重放信号处理器装置，用于对磁头执行信号输入并用于实现来自磁头的输出信号的再现，所述磁头的再现部分由磁阻的磁头组成 所述磁记录介质被构造成包括基板和形成在其上的一个或多个底层之间形成的磁性层，其中至少一个底层是由其中含有Ni的非晶或微晶材料制成的特定层 作为其主要成分或主要成分，还含有至少一种 选自Nb和Ta的元素。

公开(公告)号：US6080476A

公开(公告)日：2000-06-27

申请号：US048167

申请日：1998-03-25

申请人： Tetsuya Kanbe ,  Yoshio Takahashi ,  Akira Ishikawa ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Yoshifumi Matsuda ,  Kiwamu Tanahashi ,  Tomoo Yamamoto

发明人： Tetsuya Kanbe ,  Yoshio Takahashi ,  Akira Ishikawa ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Yoshifumi Matsuda ,  Kiwamu Tanahashi ,  Tomoo Yamamoto

IPC分类号： G11B5/66 ,  G11B5/39 ,  G11B5/64 ,  G11B5/65 ,  H01F10/16

CPC分类号： G11B5/65 ,  G11B5/64 ,  G11B5/653 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/26 ,  Y10T428/265

摘要： It is an object of the present invention to provide a magnetic recording medium which has a magnetic layer deposited on a substrate through a single-layer underlayer or a multilayer-underlayer, the magnetic layer includes magnetic crystal grains having an acicular structure or amorphous magnetic particles, an average grain size of the magnetic grain and a grain-size dispersion normalized by the average grain size are less than 16 nm and less than 0.5, respectively, a value Ku.multidot.v/kT which results from dividing a product of a magnetic anisotropy constant Ku and a volume v of the magnetic grain by a product of a Boltzmann constant k and an absolute temperature T is selected to be greater than 60, and a film thickness of the magnetic layer falls within twice of the average grain size. Thus, there can be realized a magnetic recording system in which a media noise can be reduced, a high S/N and a low bit error rate can be obtained and which has a high recording density of 2 gigabits per one square inches and an MTBF (mean time between failure) of higher than 300000 hours.

摘要翻译： 本发明的目的是提供一种通过单层底层或多层下层沉积在基板上的磁性层的磁记录介质，该磁性层包括具有针状结构的磁性晶粒或非晶磁性颗粒 磁性晶粒的平均晶粒尺寸和平均晶粒尺寸归一化的晶粒尺寸分散度分别小于16nm且小于0.5时，分别由磁各向异性常数Ku的乘积产生的Kuxv / kT值 并且通过玻尔兹曼常数k和绝对温度T的乘积将磁性粒子的体积v选择为大于60，并且磁性层的膜厚度落在平均晶粒尺寸的两倍内。 因此，可以实现可以降低媒体噪声的磁记录系统，可以获得高S / N和低误码率，并且其具有高达2吉比特每平方英寸的高记录密度和MTBF （故障之间的平均时间）高于30万小时。

公开(公告)号：US6057021A

公开(公告)日：2000-05-02

申请号：US944472

申请日：1997-10-06

申请人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

发明人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/60

CPC分类号： G11B5/7325 ,  G11B5/64 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

摘要： In a magnetic recording medium having a non-magnetic disk substrate and a magnetic film formed on the surface of the non-magnetic disk substrate, a surface average roughness factor Ra(r) on the surface of the medium being from 0.3 nm to 3 nm, an orientation ratio of coercivity being from 0.1 to 0.7, and an in-plane magnetic anisotropic energy being from 3.times.10.sup.4 J/m.sup.3 to 5.times.10.sup.5 J/m.sup.3. By using such a medium, it is possible to provide a magnetic recording apparatus in which the magnetic head is capable of flying in a low position and high-density recording is achieved.

摘要翻译： 在具有非磁盘基板和形成在非磁盘基板的表面上的磁性膜的磁记录介质中，介质表面的表面平均粗糙度Ra（r）为0.3nm〜3nm 矫顽力的取向比为0.1〜0.7，面内磁各向异性能为3×104J / m3〜5×105J / m3。 通过使用这种介质，可以提供磁头能够在低位置飞行的磁记录装置，并且实现高密度记录。

公开(公告)号：US5759681A

公开(公告)日：1998-06-02

申请号：US595303

申请日：1996-02-01

申请人： Yuzuru Hosoe ,  Kazuetsu Yoshida ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Akira Ishikawa ,  Masaaki Futamoto ,  Hiroyuki Kataoka ,  Yoshihiro Shiroishi

发明人： Yuzuru Hosoe ,  Kazuetsu Yoshida ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Akira Ishikawa ,  Masaaki Futamoto ,  Hiroyuki Kataoka ,  Yoshihiro Shiroishi

IPC分类号： G11B5/127 ,  G11B5/39 ,  G11B5/66

CPC分类号： G11B5/1278 ,  G11B5/3967 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magnetic recording system includes an intermediate layer arranged between adjacent ones of a plurality of magnetic layers constituting a magnetic recording medium, the magnetic recording medium driven by a drive section in the recording direction, and a magnetic head including a write section and a read-back section set in relative motion with respect to the magnetic recording medium. Signals are applied to the magnetic head and the output signals from the magnetic head are read back by a read/write signal processing device. The read-back section of the magnetic head includes a magnetoresistive magnetic head. The magnetic layers of the magnetic recording medium include crystal grains having different crystal orientations and existing in overlapped positions in the direction perpendicular to the medium surface. High-density information read/write operation thus is made possible with an improved reliability.

摘要翻译： 磁记录系统包括布置在构成磁记录介质的多个磁性层的相邻磁记录层之间的中间层，由记录方向上的驱动部分驱动的磁记录介质，以及包括写入区和读出区的磁头， 相对于磁记录介质相对运动地设置。 信号被施加到磁头，并且来自磁头的输出信号由读/写信号处理装置读回。 磁头的回读部分包括磁阻磁头。 磁记录介质的磁性层包括具有不同晶体取向并且在与介质表面垂直的方向上重叠位置的晶粒。 因此，高密度信息读/写操作可以提高可靠性。

公开(公告)号：US5750230A

公开(公告)日：1998-05-12

申请号：US155515

申请日：1993-11-22

申请人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

发明人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84

CPC分类号： G11B5/7325 ,  G11B5/64 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

摘要： In a magnetic recording medium having a nonmagnetic disk substrate and a magnetic film formed on the surface of the non-magnetic disk substrate, a surface average roughness factor Ra(r) on the surface of the medium being from 0.3 nm to 3 nm, an orientation ratio of coercivity being from 0.1 to 0.7, and an in-plane magnetic anisotropic energy being from 3.times.10.sup.4 J/m.sup.3 to 5.times.10.sup.5 J/m.sup.3. By using such a medium, it is possible to provide a magnetic recording apparatus in which the magnetic head is capable of flying in a low position and high-density recording is achieved.

摘要翻译： 在具有非磁性盘基片和形成在非磁盘基片的表面上的磁性膜的磁记录介质中，介质表面的表面平均粗糙系数Ra（r）为0.3nm至3nm， 矫顽力取向比为0.1〜0.7，面内磁各向异性能为3×104J / m3〜5×105J / m3。 通过使用这种介质，可以提供磁头能够在低位置飞行的磁记录装置，并且实现高密度记录。

公开(公告)号：US07641989B2

公开(公告)日：2010-01-05

申请号：US11295005

申请日：2005-12-05

申请人： Ikuko Takekuma ,  Reiko Arai ,  Yoko Ogawa ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Tomio Iwasaki

发明人： Ikuko Takekuma ,  Reiko Arai ,  Yoko Ogawa ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Tomio Iwasaki

IPC分类号： G11B5/66

CPC分类号： C23C14/568 ,  C23C14/025 ,  C23C14/0658 ,  C23C14/0688 ,  C23C14/584 ,  G11B5/65 ,  G11B5/732

摘要： Embodiments of the invention provide a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, a magnetic recording layer and an overcoat layer which are stacked over a substrate in order, the magnetic recording layer has a granular structure which consists of many columnar grains of CoCrPt alloy and a grain boundary layer containing an oxide, the seed layer is made of TaNi alloy or TaTi alloy and the intermediate layer is made of Ru or Ru alloy which contains about 80 at. % Ru or more.

摘要翻译： 本发明的实施方案提供了提供高介质S / N和良好耐腐蚀性的介质。 根据一个实施例，在依次层叠在基板上的至少包括软磁性底层，种子层，中间层，磁记录层和覆盖层的垂直磁记录介质中，磁记录层具有 由CoCrPt合金的许多柱状晶粒和含有氧化物的晶界层组成的粒状结构，种子层由TaNi合金或TaTi合金制成，中间层由含有约80at的Ru或Ru合金制成。 ％Ru或更多。