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    Magnetic storage medium
    2.
    发明授权
    Magnetic storage medium 失效
    磁存储介质

    公开(公告)号：US06534204B1

    公开(公告)日：2003-03-18

    申请号：US09405725

    申请日：1999-09-24

    申请人： Hideyuki Akimoto ,  Yuki Yoshida ,  Kenji Sato ,  Iwao Okamoto

    发明人： Hideyuki Akimoto ,  Yuki Yoshida ,  Kenji Sato ,  Iwao Okamoto

    IPC分类号： G11B566

    CPC分类号： G11B5/7325 ,  G11B5/66 ,  Y10S428/90

    摘要： There is provided a magnetic storage medium capable of recording information at high recording density and also regenerating the information with a high quality of signal (high S/Nm), and in addition contributing to the elongation of a life span of the recorded information. The magnetic storage medium comprises a non-magnetic substrate, a plurality of magnetic recording layers of ferromagnetism formed on the non-magnetic substrate, and a dividing layer of antiferromagnetism for dividing said plurality of magnetic recording layers from one another through intervening between the magnetic recording layer-to-layer.

    摘要翻译： 提供了能够以高记录密度记录信息并且还以高质量信号（高S / Nm）再生信息的磁存储介质，并且还有助于延长记录信息的使用寿命。 磁存储介质包括非磁性衬底，形成在非磁性衬底上的多个磁性磁记录层，以及用于通过介于磁记录之间的方式将所述多个磁记录层彼此分开的反铁磁分隔层 层到层。

    Glass substrate for magnetic recording medium, and magnetic recording medium
    3.
    发明授权
    Glass substrate for magnetic recording medium, and magnetic recording medium 失效
    用于磁记录介质的玻璃基板和磁记录介质

    公开(公告)号：US06833175B2

    公开(公告)日：2004-12-21

    申请号：US10097152

    申请日：2002-03-13

    申请人： Susumu Yoshida ,  Hideyuki Akimoto ,  Masaya Suzuki

    发明人： Susumu Yoshida ,  Hideyuki Akimoto ,  Masaya Suzuki

    IPC分类号： G11B582

    CPC分类号： G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

    摘要： A glass substrate for a magnetic recording medium has a textured surface having numerous grooves extending in the circumferential direction of the glass substrate. The average roughness of the textured surface is 0.4 nm or less. The number of the grooves is 15 or more per micrometer. The average depth of the grooves is 2 nm or less. The grooves are formed by mechanical texturing using a texturing liquid applied between a texturing tape and the surface of a blank glass substrate rotating. The texturing liquid is an aqueous dispersion of fine diamond abrasive grains.

    摘要翻译： 用于磁记录介质的玻璃基板具有沿着玻璃基板的圆周方向延伸的许多凹槽的织纹表面。 纹理表面的平均粗糙度为0.4nm以下。 槽的数量为每微米15个以上。 槽的平均深度为2nm以下。 通过使用施加在变形带和旋转的坯料玻璃基板的表面之间的纹理液体的机械纹理来形成凹槽。 纹理液是精细金刚石磨粒的水分散体。

    Magnetic recording medium and magnetic recording drive
    5.
    发明授权
    Magnetic recording medium and magnetic recording drive 失效
    磁记录介质和磁记录驱动

    公开(公告)号：US5900323A

    公开(公告)日：1999-05-04

    申请号：US537432

    申请日：1995-10-02

    申请人： Iwao Okamoto ,  Hideyuki Akimoto ,  Masayoshi Shinohara

    发明人： Iwao Okamoto ,  Hideyuki Akimoto ,  Masayoshi Shinohara

    IPC分类号： G11B5/66 ,  G11B5/00 ,  G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73 ,  G11B5/738

    CPC分类号： G11B5/7325 ,  G11B5/00 ,  G11B5/012 ,  G11B5/39 ,  Y10S428/90 ,  Y10T428/12632 ,  Y10T428/12854 ,  Y10T428/12903 ,  Y10T428/265

    摘要： A non-magnetic substrate, a Cu layer having a film thickness ranging from 0.5 to 10 nm, a Cr layer having a film thickness of 100 nm or less, a magnetic layer made of CoCrPt alloy in which a percentage content of Cr ranges from 12 atoms % to 20 atoms % and a percentage content of Pt ranges from 4 atoms % to 18 atoms %, a protective layer and a lubricating layer are arranged in that order to form a magnetic recording medium. Because the Cu layer is sufficiently thinned, a medium noise is sufficiently reduced, and a medium S/N ratio is sufficiently heightened. Because the film thickness of the Cr layer is 100 nm or less, the medium noise is reduced. Because the composition of CoCrPt alloy is limited in the magnetic layer, the medium S/N ratio is heightened. In addition, it is preferred that another Cu layer having a film thickness ranging from 0.5 to 10 nm be inserted into the magnetic layer to divide the magnetic layer into two layers. In this case, the medium noise is reduced by 20%, and the medium S/N ratio is heightened. Therefore, even though a magnetoresistive effect type magnetic head is used to record or reproduce information in/from the magnetic recording medium, the medium noise is sufficiently reduced, and the medium R/N ratio is sufficiently heightened.

    摘要翻译： 非磁性基板，膜厚度为0.5〜10nm的Cu层，膜厚度为100nm以下的Cr层，由Cr含量为12的CoCrPt合金制成的磁性层， 原子％至20原子％，Pt的百分含量范围为4原子％至18原子％，保护层和润滑层按顺序排列以形成磁记录介质。 因为Cu层被充分地变薄，所以中等噪声被充分地减小，并且介质S / N比被充分提高。 由于Cr层的膜厚为100nm以下，因此中等噪声降低。 由于CoCrPt合金的组成在磁性层中受到限制，所以介质S / N比提高。 此外，优选将膜厚度范围为0.5〜10nm的另一Cu层插入到磁性层中，以将磁性层分成两层。 在这种情况下，中等噪声降低20％，中等S / N比提高。 因此，即使使用磁阻效应型磁头在磁记录介质中记录信息或从磁记录介质再现信息，也能够充分降低介质噪声，提高介质R / N比。

    Magneto-resistive magnetic read head and storage apparatus using the same magnetic read head
    6.
    发明申请
    Magneto-resistive magnetic read head and storage apparatus using the same magnetic read head 审中-公开
    磁电磁读头和使用相同磁读头的存储装置

    公开(公告)号：US20080102316A1

    公开(公告)日：2008-05-01

    申请号：US11977950

    申请日：2007-10-26

    申请人： Hideyuki Akimoto ,  Jun Masuko ,  Naoki Mukouyama

    发明人： Hideyuki Akimoto ,  Jun Masuko ,  Naoki Mukouyama

    IPC分类号： G11B5/39 ,  G11B5/60

    CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T428/1121

    摘要： A magnetic read head has a first free-magnetic layer, a second free-magnetic layer, a non-magnetic layer provided between the first free-magnetic layer and the second free-magnetic layer, and a bias applying layer for applying a bias magnetic field in the vertical direction to the medium facing plane of the first free-magnetic layer and the second free-magnetic layer. Shape anisotropies of magnetization of the first free-magnetic layer and the second free-magnetic layer are inclined in the opposite direction with each other for the medium facing plane within film surfaces of respective free-magnetic layers. The first free-magnetic layer and the second free-magnetic layer are overlapped at the medium facing plane in the vertical direction at the surfaces of respective free-magnetic layer films, and the bias applying layer is located on the opposite plane to the medium facing plane of the first free-magnetic layer and the second free-magnetic layer.

    摘要翻译： 磁读头具有第一自由磁性层，第二自由磁性层，设置在第一自由磁性层和第二自由磁性层之间的非磁性层，以及用于施加偏磁的偏置施加层 在与第一自由磁性层和第二自由磁性层的介质面相对的平面上的垂直方向。 第一自由磁性层和第二自由磁性层的磁化的形状各向异性在相应的自由磁性层的膜表面内相对于介质面向平面彼此相反的方向倾斜。 第一自由磁性层和第二自由磁性层在各个自由磁性层膜的表面处在垂直方向的中间面向平面处重叠，并且偏置施加层位于与介质面对的相反平面 第一自由磁性层和第二自由磁性层的平面。

    Magnetic head
    7.
    发明申请
    Magnetic head 审中-公开
    磁头

    公开(公告)号：US20050135006A1

    公开(公告)日：2005-06-23

    申请号：US11063115

    申请日：2005-02-22

    申请人： Ikuya Tagawa ,  Hideyuki Akimoto ,  Tomoko Kutsuzawa ,  Syuji Nishida

    发明人： Ikuya Tagawa ,  Hideyuki Akimoto ,  Tomoko Kutsuzawa ,  Syuji Nishida

    IPC分类号： G11B5/127

    CPC分类号： G11B5/127

    摘要： A magnetic head increases the magnetic field strength just below a write gap 14 and thereby improves the recording resolution of a medium. To do so, an upper magnetic pole 10 and a lower magnetic pole 12 are disposed facing one another with the write gap 14 in between, with an end surface of the lower magnetic pole 12 being I-shaped and an end surface of the upper magnetic pole being T-shaped due to the upper magnetic pole 10 being formed of a first upper magnetic pole 10a that is disposed facing the lower magnetic pole 12 and is formed in an I shape that is shorter than the lower magnetic pole 12 and a second upper magnetic pole 10b that is joined to the first upper magnetic pole 10a and is formed wider than the first upper magnetic pole 10a.

    摘要翻译： 磁头使写入间隙14正下方的磁场强度增加，从而提高介质的记录分辨率。 为此，上磁极10和下磁极12彼此面对地设置有写间隙14，其中下磁极12的端面为I形，上磁极的端面 由于上磁极10由与第一上磁极10a形成的T形形成为T形，所述第一上磁极10a设置成面对下磁极12并形成为比下磁极12短的I形， 上磁极10b，其连接到第一上磁极10a并形成为比第一上磁极10a更宽。

    Magnetic head and method of producing the same
    8.
    发明申请
    Magnetic head and method of producing the same 审中-公开
    磁头及其制造方法

    公开(公告)号：US20080171232A1

    公开(公告)日：2008-07-17

    申请号：US11977205

    申请日：2007-10-24

    申请人： Tomoka Aoki ,  Junichi Hashimoto ,  Mitsuru Otagiri ,  Hideyuki Akimoto

    发明人： Tomoka Aoki ,  Junichi Hashimoto ,  Mitsuru Otagiri ,  Hideyuki Akimoto

    IPC分类号： G11B5/39 ,  C25D5/10

    CPC分类号： C25D5/10 ,  G11B5/112 ,  G11B5/3106 ,  G11B5/3967 ,  G11B5/40 ,  Y10T428/1121

    摘要： In the magnetic head, a lower shielding layer and an upper shielding layer of a read-head and a lower magnetic pole of a write-head are electrically connected to a substrate so as to prevent damage of an MR element caused by static electricity and so as not to badly influence reading characteristics of a read-head. The magnetic head comprises: a read-head having a lower shielding layer and an upper shielding layer, which are electrically connected to a substrate via a shunt resistance; and a write-head having a lower magnetic pole, which is electrically connected to the substrate via the shunt resistance, wherein the lower shielding layer and the upper shielding layer are electrically connected to the substrate via a conductive layer, and the lower magnetic pole is electrically connected to the substrate via a conductive layer, which is formed as a base layer of the lower magnetic pole.

    摘要翻译： 在磁头中，写头的读头和下磁极的下屏蔽层和上屏蔽层电连接到基板，以防止由静电导致的MR元件的损坏等 不会严重影响阅读器的阅读特性。 磁头包括：具有下屏蔽层和上屏蔽层的读头，其通过分流电电连接到基板; 以及具有下磁极的写头，其经由分流电阻电连接到所述衬底，其中所述下屏蔽层和所述上屏蔽层经由导电层电连接到所述衬底，并且所述下磁极为 通过形成为下磁极的基底层的导电层与基板电连接。

    Magnetic sensor and magnetic disk storage unit
    9.
    发明申请
    Magnetic sensor and magnetic disk storage unit 审中-公开
    磁传感器和磁盘存储单元

    公开(公告)号：US20070217086A1

    公开(公告)日：2007-09-20

    申请号：US11488495

    申请日：2006-07-18

    申请人： Masato Matsubara ,  Hideyuki Akimoto

    发明人： Masato Matsubara ,  Hideyuki Akimoto

    IPC分类号： G11B5/127 ,  G11B5/33

    CPC分类号： G11B5/3903 ,  G01R33/09

    摘要： The magnetic sensor is capable of improving variations of output power and asymmetric diversity of output signals of a magnetoresistance effect element. The magnetic sensor comprises hard films sandwiching the magnetoresistance effect element, and the hard films apply bias magnetic fields to the magnetoresistance effect element. Each of the hard films includes: a wide section, whose thickness in a height-direction is higher than that of the magnetoresistance effect film; and a link section, whose thickness in the height-direction is gradually reduced toward the magnetoresistance effect element, being extended from the wide section to a side face of the magnetoresistance effect element.

    摘要翻译： 磁传感器能够改善输出功率的变化和磁阻效应元件的输出信号的非对称分集。 磁传感器包括夹着磁阻效应元件的硬膜，硬膜对磁阻效应元件施加偏磁场。 每个硬膜包括：宽高的部分，其高度方向的厚度高于磁阻效应膜的厚度; 并且其高度方向的厚度朝着磁阻效应元件逐渐减小，从磁阻效应元件的宽截面延伸到侧面。

    Perpendicular magnetic head
    10.
    发明申请
    Perpendicular magnetic head 审中-公开
    垂直磁头

    公开(公告)号：US20070211380A1

    公开(公告)日：2007-09-13

    申请号：US11483318

    申请日：2006-07-07

    申请人： Hideyuki Akimoto ,  Mitsuru Otagiri ,  Hiroshi Shirataki

    发明人： Hideyuki Akimoto ,  Mitsuru Otagiri ,  Hiroshi Shirataki

    IPC分类号： G11B5/147

    CPC分类号： G11B5/1278 ,  G11B5/1872 ,  G11B5/3116 ,  G11B5/3146

    摘要： The perpendicular magnetic head is capable of solving the problems of side track erasing and pole erasing. The perpendicular magnetic head of the present invention comprises a write-head, which includes a main magnetic pole emitting magnetic fluxes toward a recording medium. An end face of a pole end is formed into a T-shape. A longitudinal pole section of the pole end is made of a low Bs magnetic thin film, whose end face is formed into a rectangle. A transverse pole section of the pole end is made of a high Bs magnetic thin film, whose end face is formed into a rectangle. The low Bs magnetic thin film and the high Bs magnetic thin film are determined by the formula: (area of the end face of the low Bs magnetic thin film)×(saturation magnetic flux density of the low Bs magnetic thin film)>(area of the end face of the high Bs magnetic thin film)×(saturation magnetic flux density of the high Bs magnetic thin film).

    摘要翻译： 垂直磁头能够解决侧轨擦除和磁极擦除的问题。 本发明的垂直磁头包括一个写入头，它包括一个朝着记录介质发射磁通的主磁极。 极端的端面形成为T字形。 极端的纵极部由低Bs磁性薄膜制成，其端面形成为矩形。 极端的横极部由高Bs磁性薄膜制成，其端面形成为矩形。 低Bs磁性薄膜和高Bs磁性薄膜由以下公式确定：（低Bs磁性薄膜的端面的面积）×（低Bs磁性薄膜的饱和磁通密度）>（面积 的高Bs磁性薄膜的端面）x（高Bs磁性薄膜的饱和磁通密度）。