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    Magnetic head with shield layer having discontinuous multi-layer or mixed layer and magnetic recording apparatus utilizing the magnetic head
    3.
    发明授权
    Magnetic head with shield layer having discontinuous multi-layer or mixed layer and magnetic recording apparatus utilizing the magnetic head 失效
    具有具有不连续的多层或混合层的屏蔽层的磁头和利用磁头的磁记录装置

    公开(公告)号：US06456466B1

    公开(公告)日：2002-09-24

    申请号：US09531466

    申请日：2000-03-20

    申请人： Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Takashi Kawabe ,  Hiromasa Takahashi ,  Hisashi Kimura ,  Katsuro Watanabe ,  Chiaki Ishikawa ,  Kaori Totsuka

    发明人： Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Takashi Kawabe ,  Hiromasa Takahashi ,  Hisashi Kimura ,  Katsuro Watanabe ,  Chiaki Ishikawa ,  Kaori Totsuka

    IPC分类号： G11B5127

    CPC分类号： G11B5/3903 ,  G11B5/40

    摘要： The present invention is to realize a magnetic recording and reproducing apparatus in which even if a spacing between shields of a magnetic head is narrowed, a deterioration in characteristic caused by a short-circuiting between a magnetoresistive layer and a magnetic shield layer is prevented to provide a high recording density. The present invention comprises an upper shield layer 15, a lower shield layer 13,and a magnetoresistive layer 14 arranged therebetween. Further, there is provided a constitution in which one or both shield layers has (have) a high resistance layer comprising a mixed layer of ferromagnetic metal and an insulating material, or a discontinuous multi-layer having a plurality of ferromagnetic metal layers and a plurality of insulating material layers laminated alternately, to prevent a deterioration in characteristic caused by a short-circuiting.

    摘要翻译： 本发明是为了实现磁记录和重放装置，其中即使磁头的屏蔽之间的间隔变窄，防止了由磁阻层和磁屏蔽层之间的短路引起的特性劣化，从而提供 高记录密度。 本发明包括上屏蔽层15，下屏蔽层13和布置在其间的磁阻层14。 此外，提供一种或两个屏蔽层具有包含强磁性金属和绝缘材料的混合层的高电阻层或具有多个强磁性金属层和多个绝缘材料的不连续多层的结构 的交替层叠的绝缘材料层，以防止由短路导致的特性劣化。

    Magnetoresistive head and magnetic disk apparatus
    4.
    发明授权
    Magnetoresistive head and magnetic disk apparatus 失效
    磁阻磁头和磁盘装置

    公开(公告)号：US06172859B2

    公开(公告)日：2001-01-09

    申请号：US08683978

    申请日：1996-07-22

    申请人： Katsuro Watanabe ,  Takashi Kawabe ,  Shigeru Tadokoro ,  Hiroshi Kamio ,  Takao Imagawa

    发明人： Katsuro Watanabe ,  Takashi Kawabe ,  Shigeru Tadokoro ,  Hiroshi Kamio ,  Takao Imagawa

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3903 ,  G11B5/3932 ,  G11B5/5526 ,  G11B5/59683 ,  G11B2005/3996

    摘要： A magnetoresistive head in which Barkhausen noise is substantially suppressed and a variation in reproduction is minimized, and a magnetic disk apparatus using the same magnetic head have been provided. The feature of the magnetic head and the magnetic disk apparatus of the invention resides in the provision of the longitudinal bias layer which comprises a hard magnetic thin film formed on an underlayer made of either of a ferromagnetic thin film having a body-centered cubic lattice crystal structure formed of body-centered cells, an amorphous ferromagnetic thin film or antiferromagnetic thin film having a body-centered cubic lattice crystal structure formed of body-centered cells.

    摘要翻译： 巴克豪森噪声基本上被抑制并且再现变化最小化的磁阻头，并且已经提供了使用相同磁头的磁盘装置。 本发明的磁头和磁盘装置的特征在于提供纵向偏置层，其包括形成在由具有体心立方晶格晶体的铁磁性薄膜制成的底层上的硬磁薄膜 以身体为中心的细胞构成的结构，由身体中心细胞形成的体心立方晶格结构的非晶铁磁性薄膜或反铁磁性薄膜。

    Magnetoresistive sensor and magnetic storage apparatus
    6.
    发明授权
    Magnetoresistive sensor and magnetic storage apparatus 失效
    磁阻传感器和磁存储设备

    公开(公告)号：US06693774B2

    公开(公告)日：2004-02-17

    申请号：US09803032

    申请日：2001-03-12

    申请人： Katsuro Watanabe ,  Hiromasa Takahashi ,  Nobuo Yoshida ,  Takashi Kawabe ,  Kazuhiro Nakamoto

    发明人： Katsuro Watanabe ,  Hiromasa Takahashi ,  Nobuo Yoshida ,  Takashi Kawabe ,  Kazuhiro Nakamoto

    IPC分类号： G11B5127

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/40 ,  G11B2005/3996

    摘要： A magnetoresistive sensor which, despite a narrow reproducing shield gap, affords high resolution and high reproducing output because of its structure and is able to minimize the amount of sense current leaking into the shield layer through the gap layer. A magnetic storage apparatus suitable for high-density recording is provided with a magnetic head having said magnetoresistive sensor. The structure is characterized in that at least either of the lower shield layer or upper shield layer is partly or entirely a magnetic layer which is a composite film composed of ferromagnetic metal and oxide, and an insulation protective film is arranged between the electrode film or longitudinal bias film and the magnetic film which is a composite film composed of ferromagnetic metal and oxide.

    摘要翻译： 尽管具有窄的再现屏蔽间隙，磁阻传感器由于其结构而提供高分辨率和高再现输出，并且能够使通过间隙层泄漏到屏蔽层中的感测电流的量最小化。 适用于高密度记录的磁存储装置设置有具有所述磁阻传感器的磁头。 该结构的特征在于，下屏蔽层或上屏蔽层中的至少一个部分或全部是作为由铁磁性金属和氧化物构成的复合膜的磁性层，绝缘保护膜设置在电极膜或纵向 偏置膜和由铁磁性金属和氧化物构成的复合膜的磁性膜。

    Magnetoresistive head with a CPP structure having suppressed side reading
    8.
    发明授权
    Magnetoresistive head with a CPP structure having suppressed side reading 有权
    具有抑制侧读的CPP结构的磁阻头

    公开(公告)号：US09230574B2

    公开(公告)日：2016-01-05

    申请号：US12631295

    申请日：2009-12-04

    申请人： Nobuo Yoshida ,  Katsuro Watanabe ,  Masahiro Ousugi ,  Atsushi Kato

    发明人： Nobuo Yoshida ,  Katsuro Watanabe ,  Masahiro Ousugi ,  Atsushi Kato

    IPC分类号： G11B5/39 ,  B82Y10/00 ,  B82Y25/00

    CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T29/49032

    摘要： According to one embodiment, a CPP structure magnetoresistive head includes a magnetoresistive sensor film between a lower shield layer and an upper shield layer and a longitudinal biasing layer disposed at each side of the magnetoresistive sensor film via a read track width defining insulator film. In the stripe height direction, the length of the longitudinal biasing layer is longer than the length of a second ferromagnetic layer in which its magnetization rotates in response to the external magnetic field. The second ferromagnetic layer is one of the layers comprising the magnetoresistive sensor film. At a stripe height, the surface of each longitudinal biasing layer has a step to change the thickness thereof across the step so that the air bearing surface section thereof has a larger thickness than any other section. Other structures using a magnetoresistive head and methods of production thereof are described as well.

    摘要翻译： 根据一个实施例，CPP结构磁阻头包括在下屏蔽层和上屏蔽层之间的磁阻传感器膜和经由读磁道宽度限定绝缘膜设置在磁阻传感器膜的每一侧的纵向偏置层。 在条带高度方向上，纵向偏置层的长度长于其磁化响应于外部磁场而旋转的第二铁磁层的长度。 第二铁磁层是包括磁阻传感器膜的层之一。 在条带高度处，每个纵向偏置层的表面具有改变其横跨该台阶的厚度的步骤，使得其空气轴承表面部分具有比任何其它部分更大的厚度。 还描述了使用磁阻头的其它结构及其生产方法。

    Thin film magnetic head having an angled insulating film
    9.
    发明授权
    Thin film magnetic head having an angled insulating film 失效
    薄膜磁头具有成角度的绝缘膜

    公开(公告)号：US08184406B2

    公开(公告)日：2012-05-22

    申请号：US11786458

    申请日：2007-04-10

    申请人： Nubuo Yoshida ,  Katsuro Watanabe ,  Takayoshi Ohtsu

    发明人： Nubuo Yoshida ,  Katsuro Watanabe ,  Takayoshi Ohtsu

    IPC分类号： G11B5/147 ,  G11B5/127

    CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3163 ,  G11B5/3929 ,  G11B2005/3996 ,  H01F41/34 ,  Y10T29/49021

    摘要： Embodiments in accordance with the present invention provide a thin film magnetic head for preventing a short-circuit failure during formation of a track portion or a stripe-height portion and improving a yield. In one embodiment, a stripe-height direction is first formed, and then a track-width direction is formed. A third insulating film having a smoothly shaped wall surface is formed on a first insulating film during stripe-height formation. During formation of the third insulating film, an optimized lift-off pattern is used to smooth an edge shape.

    摘要翻译： 根据本发明的实施例提供了一种薄膜磁头，用于防止在形成轨道部分或条纹高度部分期间发生短路故障并提高产量。 在一个实施例中，首先形成条纹高度方向，然后形成轨道宽度方向。 在条纹高度形成期间，在第一绝缘膜上形成具有平滑形状的壁表面的第三绝缘膜。 在第三绝缘膜的形成期间，使用优化的剥离图案来平滑边缘形状。

    Magnetoresistive head with larger longitudinal biasing
    10.
    发明申请
    Magnetoresistive head with larger longitudinal biasing 审中-公开
    磁阻头具有较大的纵向偏置

    公开(公告)号：US20080212238A1

    公开(公告)日：2008-09-04

    申请号：US12012341

    申请日：2008-01-31

    申请人： Katsuro Watanabe ,  Satoru Okamoto ,  Masahiro Osugi ,  Koji Okazaki

    发明人： Katsuro Watanabe ,  Satoru Okamoto ,  Masahiro Osugi ,  Koji Okazaki

    IPC分类号： G11B5/33

    CPC分类号： G11B5/59633 ,  G11B5/59666

    摘要： Embodiments of the present invention help to efficiently apply a longitudinal biasing with appropriate strength from a longitudinal biasing layer to a free layer even in a small read gap length. According to one embodiment, in the track width direction of the magnetoresistive film, the longitudinal biasing layer excluding its portion close to the magnetoresistive film is made approximately uniform in thickness. An edge toward the magnetoresistive film of the longitudinal biasing layer is positioned more outwardly in the track width direction than an edge in the track width direction of the free layer. A portion closest to the substrate of the interface between the longitudinal biasing layer and the insulator on the track-width sides is positioned lower than the interface between the magnetoresistive film and the lower magnetic shield layer.

    摘要翻译： 本发明的实施例有助于即使在小的读取间隙长度中也可以将具有适当强度的纵向偏置从纵向偏置层施加到自由层。 根据一个实施例，在磁阻膜的磁道宽度方向上，除了靠近磁阻膜的部分之外的纵向偏置层的厚度大致均匀。 朝向纵向偏置层的磁阻膜的边缘比沿自由层的轨道宽度方向的边缘更靠外侧位于轨道宽度方向上。 在纵向偏置层和轨道宽度侧的绝缘体之间的界面最靠近的部分位于低于磁阻膜和下部磁屏蔽层之间的界面的位置。