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    Recording/reproducing separated type magnetic head having differential bias type magnetic domain control structure
    1.
    发明授权
    Recording/reproducing separated type magnetic head having differential bias type magnetic domain control structure 失效
    具有差分偏置型磁畴控制结构的记录/再现分离式磁头

    公开(公告)号：US07154714B2

    公开(公告)日：2006-12-26

    申请号：US10464574

    申请日：2003-06-19

    申请人： Hiroshi Fukui ,  Shigekazu Otomo ,  Shuichi Kojima ,  Kouji Kataoka

    发明人： Hiroshi Fukui ,  Shigekazu Otomo ,  Shuichi Kojima ,  Kouji Kataoka

    IPC分类号： G11B5/39

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3967 ,  G11B2005/3996

    摘要： A recording/reproducing separated type magnetic head comprising a first magnetic domain control layer for arranging the magnetizing direction of a free layer included in a magneto-resistive element to a predetermined direction, and a second magnetic domain control layer for generating a magnetic field in the direction opposite thereto to constitute a differential type bias structure. The recording/reproducing separated type magnetic head decreases an excessively strengthened longitudinal bias magnetic field in a central portion at a narrow track width while avoiding decrease of the fixed magnetic field at the end of the magneto-resistive element in the direction of the track width.

    摘要翻译： 一种记录/再现分离型磁头，包括用于将包括在磁阻元件中的自由层的磁化方向排列到预定方向的第一磁畴控制层，以及用于在第一磁畴控制层中产生磁场的第二磁畴控制层 相反的方向构成差分型偏压结构。 记录/再现分离型磁头减小了在窄轨道宽度的中心部分中的过度增强的纵向偏置磁场，同时避免了磁阻元件末端在磁道宽度方向上的固定磁场的减小。

    METHOD OF CALCULATING ION IMPLANTATION DISTRIBUTION AND PROGRAM IMPLEMENTING THE CALCULATION METHOD
    2.
    发明申请
    METHOD OF CALCULATING ION IMPLANTATION DISTRIBUTION AND PROGRAM IMPLEMENTING THE CALCULATION METHOD 审中-公开
    计算离子植入分布方法和程序实现计算方法

    公开(公告)号：US20090306913A1

    公开(公告)日：2009-12-10

    申请号：US12543965

    申请日：2009-08-19

    申请人： Kunihiro Suzuki ,  Shuichi Kojima

    发明人： Kunihiro Suzuki ,  Shuichi Kojima

    IPC分类号： G06F19/00 ,  G01N23/00

    CPC分类号： H01L22/20 ,  H01L21/265 ,  H01L22/12

    摘要： A method of calculating an ion concentration distribution is provided. The method includes: setting meshes at regular intervals d along a beam axis of a beam implanted at a tilt angle α; making mesh intervals on a surface d/sinα; generating meshes parallel and perpendicular to the beam axis in a simulator; and calculating an ion concentration distribution by using the meshes.

    摘要翻译： 提供了计算离子浓度分布的方法。 该方法包括：以沿倾斜角度α注入的光束的光束轴以规则的间隔d设置网格; 在表面d / sinalpha上形成网格间隔; 在模拟器中产生平行且垂直于光束轴的网格; 以及通过使用所述网格计算离子浓度分布。

    Motor drive unit
    3.
    发明授权
    Motor drive unit 失效
    电机驱动单元

    公开(公告)号：US07466086B2

    公开(公告)日：2008-12-16

    申请号：US11485025

    申请日：2006-07-12

    申请人： Mitsuyuki Kiuchi ,  Sadayuki Tamae ,  Hisashi Hagiwara ,  Masahiro Suzuki ,  Shuichi Kojima

    发明人： Mitsuyuki Kiuchi ,  Sadayuki Tamae ,  Hisashi Hagiwara ,  Masahiro Suzuki ,  Shuichi Kojima

    IPC分类号： H02P5/00

    CPC分类号： H02P21/06 ,  H02P5/74 ,  H02P5/747

    摘要： A motor drive unit comprises a DC power source, a plurality of inverter circuits for converting the a power of this DC power source to an AC power, current detectors for detecting an output current of at least one of those plurality of inverter circuits and a controller for performing PWM control of those plurality of inverter circuits. This controller is constructed in a way to synchronize a PWM period of the plurality of inverter circuits, so as to drive a plurality of motors at once by means of those plurality of inverter circuits respectively.

    摘要翻译： 电动机驱动单元包括直流电源，将该直流电源的功率转换为交流电的多个逆变器电路，用于检测这些多个逆变器电路中的至少一个的输出电流的电流检测器和控制器 用于执行那些多个逆变器电路的PWM控制。 该控制器以使多个逆变器电路的PWM周期同步的方式构成，以分别通过那些多个反相器电路一次驱动多个电动机。

    Magnetic head with magnetic domain control structure having anti-ferromagnetic layer and plural magnetic layers
    4.
    发明授权
    Magnetic head with magnetic domain control structure having anti-ferromagnetic layer and plural magnetic layers 失效
    具有磁畴控制结构的磁头具有反铁磁层和多个磁性层

    公开(公告)号：US07230803B2

    公开(公告)日：2007-06-12

    申请号：US10771312

    申请日：2004-02-05

    申请人： Akira Morinaga ,  Koichi Nishioka ,  Takayoshi Ohtsu ,  Norifumi Miyamoto ,  Shuichi Kojima

    发明人： Akira Morinaga ,  Koichi Nishioka ,  Takayoshi Ohtsu ,  Norifumi Miyamoto ,  Shuichi Kojima

    IPC分类号： G11B5/39

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

    摘要： A magneto-resistive effect head including: an antiferromagnetic layer; a pinned layer which is formed on the antiferromagnetic layer and whose magnetizing direction has been fixed; a spacer formed on the pinned layer; a free layer formed on the spacer; and magnetic domain control layers having antiferromagnetic flims and magnet layers for performing a magnetic domain control of the free layer; wherein the each of the antiferromagnetjc films is formed on the free layer; wherein the each of magnet layers has at least two magnetic films coupled anti-ferromagnetically through at least one nonmagnetic film; a pair of lead layers for supplying a current to the stack of layers; and wherein seed layers are formed between the antiferromagnetic films and the lead layers.

    摘要翻译： 磁阻效应头包括：反铁磁层; 形成在反铁磁层上并且其磁化方向已被固定的钉扎层; 形成在被钉扎层上的间隔物; 形成在间隔物上的自由层; 以及磁畴控制层，其具有用于对自由层进行磁畴控制的反铁磁性薄膜和磁铁层; 其中每个反铁磁膜形成在自由层上; 其中每个磁体层具有至少两个通过至少一个非磁性膜反铁磁耦合的磁膜; 一对用于向层叠层提供电流的引线层; 并且其中在反铁磁膜和引线层之间形成种子层。

    Spin-valve giant magnetoresistive head and method of manufacturing the same
    5.
    发明授权
    Spin-valve giant magnetoresistive head and method of manufacturing the same 失效
    旋转阀巨磁阻头及其制造方法

    公开(公告)号：US06717778B2

    公开(公告)日：2004-04-06

    申请号：US09931255

    申请日：2001-08-17

    申请人： Masatoshi Arasawa ,  Haruko Tanaka ,  Makoto Morijiri ,  Koichi Nishioka ,  Shuichi Kojima ,  Masayasu Kagawa

    发明人： Masatoshi Arasawa ,  Haruko Tanaka ,  Makoto Morijiri ,  Koichi Nishioka ,  Shuichi Kojima ,  Masayasu Kagawa

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3166 ,  G11B5/3903 ,  G11B5/3906 ,  G11B5/398 ,  G11B2005/3996 ,  Y10T29/49021 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

    摘要： Multiple thin films of spin-valve GMR sensor are formed in a trapezoidal cross-sectional shape by laminating an antiferromagnetic layer, a pinned magnetic layer, a nonmagnetic conductive layer, a free magnetic layer and a nonmagnetic protective layer on a lower insulated gap layer. The amount of etching of the lower insulated gap layer produced in the process of patterning the spin-valve giant magnetoresistive layers into the multiple thin films of spin-valve GMR sensor is 10 nm or less. Further, the angle &thgr; which the tangent line of each side face of the multiple thin films to the middle line of the free magnetic layer in its thickness direction forms with respect to the middle line of the free magnetic layer becomes 45 degrees or more. This structure makes it possible to provide such a spin-valve giant magnetoresistive head that it meets the requirements for securing constant breakdown voltage and preventing instability of MR output voltage waveform.

    摘要翻译： 通过在下绝缘间隙层上层叠反铁磁层，钉扎磁性层，非磁性导电层，自由磁性层和非磁性保护层，形成梯形截面形状的多个自旋阀GMR传感器薄膜。 在将自旋阀巨磁阻层图案化成自旋阀GMR传感器的多个薄膜的过程中产生的下绝缘间隙层的蚀刻量为10nm以下。 此外，相对于自由磁性层的中间线，多个薄膜的每个侧面的切线与自由磁性层的中间线在其厚度方向上形成的角度θ成为45度以上。 这种结构使得可以提供这样的自旋阀巨磁阻头，其满足确保恒定击穿电压的要求并防止MR输出电压波形的不稳定性。

    Magnetic head with a narrow spacing between magnetic shields at air bearing surface
    7.
    发明授权
    Magnetic head with a narrow spacing between magnetic shields at air bearing surface 失效
    磁头在空气轴承表面的磁屏蔽之间具有窄的间距

    公开(公告)号：US07586715B2

    公开(公告)日：2009-09-08

    申请号：US11336185

    申请日：2006-01-20

    申请人： Naoki Koyama ,  Kouji Okazaki ,  Izuru Ishii ,  Shuichi Kojima ,  Shigeru Tadokoro

    发明人： Naoki Koyama ,  Kouji Okazaki ,  Izuru Ishii ,  Shuichi Kojima ,  Shigeru Tadokoro

    IPC分类号： G11B5/39

    CPC分类号： G11B5/398 ,  G11B5/3912 ,  G11B2005/0005 ,  G11B2005/0016

    摘要： Even if the track and gap widths are made narrow in a read head, a narrow track head has so far been unable to afford satisfactory off-track characteristics because of a wide shield spacing over electrodes. The invention provides a magnetic head wherein, in the height direction of a magnetoresistive element, the spacing between an upper magnetic shield and a lower magnetic shield at an air bearing surface is narrower than the spacing between the upper and lower magnetic shields formed over a thickest portion of each of electrodes in contact with associated magnetic domain control layers.

    摘要翻译： 即使轨道和间隙宽度在读取头中变窄，由于在电极上的屏蔽间隔较宽，所以窄轨道头部迄今为止不能提供令人满意的离轨特性。 本发明提供一种磁头，其中在磁阻元件的高度方向上，在空气支承表面上的上磁屏蔽和下磁屏蔽之间的间隔比形成在最厚的上磁屏蔽之间的间隔窄 每个电极的部分与相关的磁畴控制层接触。

    Magnetic head of magnetoresistance effect type with high resistance to external stress
    8.
    发明申请
    Magnetic head of magnetoresistance effect type with high resistance to external stress 有权
    具有高耐外部应力的磁阻效应型磁头

    公开(公告)号：US20080074803A1

    公开(公告)日：2008-03-27

    申请号：US11900533

    申请日：2007-09-11

    申请人： Naoki Koyama ,  Koichi Nishioka ,  Kouji Okazaki ,  Shuichi Kojima ,  Azusa Hori ,  Satoshi Shigematsu ,  Yukimasa Okada

    发明人： Naoki Koyama ,  Koichi Nishioka ,  Kouji Okazaki ,  Shuichi Kojima ,  Azusa Hori ,  Satoshi Shigematsu ,  Yukimasa Okada

    IPC分类号： G11B5/33

    CPC分类号： G11B5/39

    摘要： Embodiments of the present invention prevent a pinned layer from suffering magnetization reversal by external stress in a magnetic head of magnetoresistance effect type which has a synthetic ferri-magnetic pinned layer structure with an antiferromagnetic layer of IrMnCr. According to one embodiment, a read element of a magnetoresistive head is made up of a antiferromagnetic layer, a first pinned layer, an antiferromagnetically coupled layer 4, a second pinned layer, and a free layer, which are stacked one over another. The first and second pinned layers and have a composition of Co75Fe25 and Co95Fe5, respectively, and a thickness of 18 Å (3.5 nm·T) and 21 Å (3.9 nm·T), respectively, so as to reduce the difference in anisotropic energy between the first pinned layer in contact with the antiferromagnetic layer and the second pinned layer in contact with the nonmagnetic conductive layer. In this way it is possible to reduce the difference |λ1−λ2| in magnetostriction constant between the first and second pinned layers and below 5.0×10−6. Thus it is possible to protect the pinned layer from external stress and magnetic field which rotate the direction of magnetization.

    摘要翻译： 本发明的实施例通过具有IrMnCr反铁磁性层的合成铁磁性固定层结构的磁阻效应型磁头防止被钉扎层受到外部应力的磁化反转。 根据一个实施例，磁阻头的读取元件由反铁磁层，第一被钉扎层，反铁磁耦合层4，第二钉扎层和自由层叠加而成。 第一和第二被钉扎层分别具有Co Fe 25 和 ，并且分别具有18（3.5nm.T）和21（3.9nm.T）的厚度，以便减少与反铁磁层接触的第一被钉扎层与第二被钉扎层之间的各向异性能的差异 与非磁性导电层接触。 以这种方式，可以减小| lambda1-lambda2 |的差异 在第一和第二被钉扎层之间的磁致伸缩常数以及5.0×10 -6以下。 因此，可以保护被钉扎层免受旋转磁化方向的外部应力和磁场。