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    Magnetic head of magnetoresistance effect type with high resistance to external stress
    1.
    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。

    Magnetic head of magnetoresistance effect type with high resistance to external stress
    2.
    发明授权
    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：US07957109B2

    公开(公告)日：2011-06-07

    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： G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/39

    摘要： A tunnel magnetoresistance effect magnetic head having between magnetic shield layers, an antiferromagnetic layer, a pinned layer which has the direction of magnetization pinned by exchange coupling with the antiferromagnetic layer, an insulating layer, and a free layer whose direction of magnetization rotates relatively to external magnetic fields, wherein the antiferromagnetic layer is of an antiferromagnetic substance composed mainly of IrMn, the pinned layer is made up of a first pinned layer of CoFe alloy in contact with the antiferromagnetic layer and a second pinned layer of CoFeB alloy which is antiferromagnetically coupled with the first pinned layer, and the first and second pinned layers have the amount of magnetization such that the difference M1−M2 is in the range of 0

    摘要翻译： 具有磁屏蔽层之间的隧道磁阻效应磁头，反铁磁层，具有通过与反铁磁层交换耦合固定的磁化方向的被钉扎层，绝缘层和磁化方向相对于外部的自由层 磁场，其中反铁磁层是主要由IrMn组成的反铁磁性物质，被钉扎层由与反铁磁层接触的第一CoFe合金层和与铁磁性合金反铁磁合金的第二被钉扎层组成 第一被钉扎层，并且第一和第二钉扎层具有磁化量，使得差值M1-M2在0

    Magnetic head and method of manufacturing the same
    3.
    发明申请
    Magnetic head and method of manufacturing the same 失效
    磁头及其制造方法

    公开(公告)号：US20060158789A1

    公开(公告)日：2006-07-20

    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： G11B5/33 ,  G11B5/127 ,  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 with a narrow spacing between magnetic shields at air bearing surface
    4.
    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。

    Magnetoresistive head and fabricating method thereof, and read write separation type head
    5.
    发明授权
    Magnetoresistive head and fabricating method thereof, and read write separation type head 有权
    磁阻头及其制造方法，以及读写分离型头

    公开(公告)号：US07675715B2

    公开(公告)日：2010-03-09

    申请号：US11227906

    申请日：2005-09-14

    申请人： Masatoshi Arasawa ,  Izuru Ishii ,  Shuichi Kojima ,  Naoki Koyama ,  Norihiro Ookawa

    发明人： Masatoshi Arasawa ,  Izuru Ishii ,  Shuichi Kojima ,  Naoki Koyama ,  Norihiro Ookawa

    IPC分类号： G11B5/33 ,  G11B5/127

    CPC分类号： G11B5/3163 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3912

    摘要： In one embodiment, a seed layer, an underlayer, and a magnetic domain control layer are laminated on both sides of a magnetoresistive sheet unit. A lower electrode film is thinly formed on an upper portion of the magnetic domain control film. A portion of the lower electrode film near the magnetoresistive sheet unit does not protrude substantially from an upper surface of the magnetoresistive sheet unit. Should the portion protrude, a step from the upper surface of the magnetoresistive sheet unit is about 14 nm or less. This portion and the upper surface of the magnetoresistive sheet unit are formed into a flat surface. An upper electrode film is formed thickly on an upper portion of the lower electrode film on an outside thereof so as to circumvent the flat surface. A protective layer, an upper gap film, and an upper magnetic shield film are also formed.

    摘要翻译： 在一个实施例中，种子层，底层和磁畴控制层层叠在磁阻片单元的两侧。 在磁畴控制膜的上部薄薄地形成下电极膜。 磁阻片单元附近的下电极膜的一部分基本上不从磁阻片单元的上表面凸出。 如果该部分突出，则从磁阻片单元的上表面开始的步长约为14nm或更小。 磁阻片单元的该部分和上表面形成为平坦表面。 在下部电极膜的上部的外侧厚度形成上部电极膜，以便绕着平坦表面。 还形成保护层，上间隙膜和上磁屏蔽膜。

    Magnetoresistive head and fabricating method thereof, and read write separation type head
    6.
    发明申请
    Magnetoresistive head and fabricating method thereof, and read write separation type head 有权
    磁阻头及其制造方法，以及读写分离型头

    公开(公告)号：US20060056112A1

    公开(公告)日：2006-03-16

    申请号：US11227906

    申请日：2005-09-14

    申请人： Masatoshi Arasawa ,  Izuru Ishii ,  Shuichi Kojima ,  Naoki Koyama ,  Norihiro Ookawa

    发明人： Masatoshi Arasawa ,  Izuru Ishii ,  Shuichi Kojima ,  Naoki Koyama ,  Norihiro Ookawa

    IPC分类号： G11B5/33 ,  G11B5/127

    CPC分类号： G11B5/3163 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3912

    摘要： Making a geometric track width small does not decrease a read track width, resulting only in an output being reduced. In one embodiment, a seed layer, an underlayer, and a magnetic domain control layer are laminated on both sides of a magnetoresistive sheet unit. A lower electrode film is thinly formed on an upper portion of the magnetic domain control film. A portion of the lower electrode film near the magnetoresistive sheet unit does not protrude substantially from an upper surface of the magnetoresistive sheet unit. Should the portion protrude, a step from the upper surface of the magnetoresistive sheet unit is about 14 nm or less. This portion and the upper surface of the magnetoresistive sheet unit are formed into a flat surface. An upper electrode film is formed thickly on an upper portion of the lower electrode film on an outside thereof so as to circumvent the flat surface. A protective layer, an upper gap film, and an upper magnetic shield film are also formed.

    摘要翻译： 使几何轨道宽度较小不会减小读取磁道宽度，从而仅减少输出。 在一个实施例中，种子层，底层和磁畴控制层层叠在磁阻片单元的两侧。 在磁畴控制膜的上部薄薄地形成下电极膜。 磁阻片单元附近的下电极膜的一部分基本上不从磁阻片单元的上表面凸出。 如果该部分突出，则从磁阻片单元的上表面开始的步长约为14nm或更小。 磁阻片单元的该部分和上表面形成为平坦表面。 在下部电极膜的上部的外侧厚度形成上部电极膜，以便绕着平坦表面。 还形成保护层，上间隙膜和上磁屏蔽膜。

    CONDUCTIVE RUBBER ROLLER AND TRANSFER ROLLER
    7.
    发明申请
    CONDUCTIVE RUBBER ROLLER AND TRANSFER ROLLER 审中-公开
    导电橡胶辊和转辊

    公开(公告)号：US20090162109A1

    公开(公告)日：2009-06-25

    申请号：US12326667

    申请日：2008-12-02

    申请人： Naoki Koyama ,  Erika Umeki ,  Satoshi Fukuzawa

    发明人： Naoki Koyama ,  Erika Umeki ,  Satoshi Fukuzawa

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0818 ,  G03G15/1685

    摘要： A conductive rubber roller and transfer roller whose resistance value is easily controlled and which lowers contamination of a charged member and has excellent electric variability and compressive permanent set is provided at low cost. There is provided a conductive rubber roller for use in an electrophotographic process, wherein a rubber component of the conductive rubber roller has at least acrylonitrile butadiene rubber whose acrylonitrile content is 15% by mass to 25% by mass (both inclusive) and weight average molecular weight (Mw) is 500,000 to 1,000,000 (both inclusive), and epichlorohydrin type rubber whose ethylene oxide content is not less than 70% by mole to less than 90% by mole; and the acrylonitrile butadiene rubber is contained in an amount of 5 parts by mass to 80 parts by mass (both inclusive) in 100 parts by mass of the rubber component.

    摘要翻译： 以低成本提供电阻值易于控制并且降低带电部件的污染并且具有优异的电变异性和压缩永久变形的导电橡胶辊和转印辊。 提供一种用于电子照相方法的导电橡胶辊，其中导电橡胶辊的橡胶组分至少具有丙烯腈含量为15质量％至25质量％（包括二端）的丙烯腈 - 丁二烯橡胶和重均分子量 重量（Mw）为500,000至1,000,000（包括两端）和环氧乙烷含量不小于70摩尔％至小于90摩尔％的表氯醇型橡胶; 丙烯腈 - 丁二烯橡胶的含量相对于橡胶成分100质量份为5质量份〜80质量份。