公开(公告)号：US20070253051A1

公开(公告)日：2007-11-01

申请号：US10572493

申请日：2004-09-17

申请人： Kunihiko Ishihara ,  Genichi Hatakoshi ,  Keishi Ohashi ,  Katsutaro Ichihara ,  Urara Ichihara

发明人： Kunihiko Ishihara ,  Genichi Hatakoshi ,  Keishi Ohashi ,  Katsutaro Ichihara ,  Urara Ichihara

IPC分类号： G02B26/08

CPC分类号： G03B21/56 ,  Y10T428/12694

摘要： A conductive thin film has first and second surfaces and at least one opening extending through from the first surface to the second surface. At least on one of the first and second surfaces, first and second periodic surface patterns having different period lengths are provided. The period length of the second periodic surface pattern is substantially equal to an odd integral multiple of a half of the period length of the first periodic surface pattern. With this, surface plasmon polaritons excited by the first periodic surface pattern undergo odd-order Bragg reflection by the second periodic surface pattern. As a result, the intensity of the light falling on the first surface and transmitted to the second surface through the opening is increased with high efficiency.

摘要翻译： 导电薄膜具有第一和第二表面以及从第一表面延伸到第二表面的至少一个开口。 至少在第一和第二表面中的一个上，提供具有不同周期长度的第一和第二周期性表面图案。 第二周期性表面图案的周期长度基本上等于第一周期性表面图案的周期长度的一半的奇数整数倍。 由此，由第一周期性表面图案激发的表面等离子体激元由第二周期性表面图案经历奇数阶布拉格反射。 结果，以高效率提高落在第一表面上并通过开口传递到第二表面的光的强度。

公开(公告)号：US20050185339A1

公开(公告)日：2005-08-25

申请号：US10911578

申请日：2004-08-05

申请人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

发明人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

IPC分类号： G11B5/127 ,  G11B5/31 ,  G11B5/147

CPC分类号： G11B5/3109 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3163

摘要： A recording head is a magnetic head in which ends on one side of opposed first and second magnetic cores form a recording gap, said other ends form a magnetic joint, coils insulated by an insulating material are provided between said first and second magnetic cores, magnetic fluxes of said first and second magnetic cores excited by said coils leak from said recording gap so that recording onto a recording medium is carried out. In said recording head, a distance from said end of said recording gap close to said magnetic medium to a contact point of said magnetic joint (hereinafter, yoke length) is not more than 20 μm. A magnetic recording/reproduction apparatus has this head.

摘要翻译： 记录头是磁头，其中在相对的第一和第二磁芯的一侧上的端部形成记录间隙，所述另一端形成磁性接头，在所述第一和第二磁芯之间设置由绝缘材料绝缘的线圈，磁性 由所述线圈激励的所述第一和第二磁芯的磁通从所述记录间隙泄漏，从而进行到记录介质上的记录。 在所述记录头中，从所述记录间隙的接近所述磁介质的端部到所述磁性接头的接触点（以下称为磁轭长度）的距离不大于20微米。 磁记录/再现装置具有该磁头。

公开(公告)号：US20050047010A1

公开(公告)日：2005-03-03

申请号：US10486687

申请日：2002-08-15

申请人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Keishi Ohashi

发明人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Keishi Ohashi

IPC分类号： G02B26/08 ,  B81B3/00 ,  H01F7/06 ,  H01F7/08 ,  H01H50/00 ,  G11B5/17

CPC分类号： H01H50/005 ,  H01F7/08 ,  H01F2007/068

摘要： The present invention provided a thin-film electromagnet including a magnetic yoke and a thin-film coil, characterized in that the magnetic yoke is comprised of a first magnetic yoke and a second magnetic yoke making contact with the first magnetic yoke, the first magnetic yoke is located at a center of a winding of which the thin-film coil is comprised, and the second magnetic yoke is arranged above or below the thin-film coil such that the second magnetic yoke faces the thin-film coil, and overlaps at least a part of the thin-film coil.

摘要翻译： 本发明提供一种包括磁轭和薄膜线圈的薄膜电磁铁，其特征在于，所述磁轭由第一磁轭和与所述第一磁轭接触的第二磁轭构成，所述第一磁轭 位于其中包含薄膜线圈的绕组的中心，并且第二磁轭布置在薄膜线圈的上方或下方，使得第二磁轭面对薄膜线圈，并且至少重叠 薄膜线圈的一部分。

公开(公告)号：US06507466B1

公开(公告)日：2003-01-14

申请号：US09556335

申请日：2000-04-24

申请人： Kazuhiko Hayashi ,  Keishi Ohashi

发明人： Kazuhiko Hayashi ,  Keishi Ohashi

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3106 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/40 ,  G11B2005/0016 ,  G11B2005/3996

摘要： In a magnetoresistive effect head in which a magnetoresistive effect element made from either a ferromagnetic tunnel junction film or a spin valve film is formed as a magnetoresistive sensor, a diode is connected in parallel with a first and a second electrode of the magnetoresistive effect element.

摘要翻译： 在其中由铁磁隧道结膜或自旋阀膜制成的磁阻效应元件形成为磁阻传感器的磁阻效应头中，二极管与磁阻效应元件的第一和第二电极并联连接。

公开(公告)号：US06452204B1

公开(公告)日：2002-09-17

申请号：US09456881

申请日：1999-12-08

申请人： Nobuyuki Ishiwata ,  Keishi Ohashi ,  Hisanao Tsuge

发明人： Nobuyuki Ishiwata ,  Keishi Ohashi ,  Hisanao Tsuge

IPC分类号： H01L2906

CPC分类号： H01L43/08 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/58 ,  G11B33/14 ,  H01F10/3254

摘要： In a tunneling magnetoresistance transducer including first and second ferromagnetic layers and a tunnel barrier layer made of insulating material sandwiched by the first and second ferromagnetic layers, the resistance of the tunnel barrier layer remains essentially constant independent of the temperature of the transducer.

公开(公告)号：US06134091A

公开(公告)日：2000-10-17

申请号：US174876

申请日：1998-10-16

申请人： Kaoru Toki ,  Haruo Urai ,  Keishi Ohashi

发明人： Kaoru Toki ,  Haruo Urai ,  Keishi Ohashi

IPC分类号： G11B5/39 ,  H01F10/08 ,  H01F10/30 ,  H01F10/32 ,  H01L43/08

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3967 ,  H01F10/3268 ,  G11B2005/3996 ,  G11B5/3932 ,  G11B5/399

摘要： An MR head in which a spin-valve device unit is formed into a horizontal shape and an anti-ferromagnetic layer is not required, is provided. The spin-valve device unit includes a first ferromagnetic layer, one and another permanent magnetic layers arranged on both end portions of the first ferromagnetic layer and creating a magnetic path from one of the end portions of the first ferromagnetic layer toward the other thereof. A second ferromagnetic layer is provided above the first ferromagnetic layer through a non-magnetic conductive layer and a soft magnetic layer is provided above the second ferromagnetic layer through a non-magnetic layer. The both end portions of the second ferromagnetic layer are designed to contact with outer end portions of the permanent magnet layers, respectively. Surfaces of the permanent magnet layers are perpendicular to the surface of a magnetic storage medium and to the magnetization direction thereof.

摘要翻译： 提供其中不需要将自旋阀装置单元形成水平形状和反铁磁层的MR头。 自旋阀装置单元包括第一铁磁层，一个永久磁铁层和另一个永久磁性层，其布置在第一铁磁层的两个端部上，并产生从第一铁磁层的一个端部朝向另一个的磁路。 第二铁磁层通过非磁性导电层设置在第一铁磁层之上，并且软磁层通过非磁性层设置在第二铁磁层之上。 第二铁磁层的两端分别设计成与永磁体层的外端部分接触。 永磁体层的表面垂直于磁存储介质的表面及其磁化方向。

公开(公告)号：US5856898A

公开(公告)日：1999-01-05

申请号：US840276

申请日：1992-02-24

申请人： Keishi Ohashi

发明人： Keishi Ohashi

IPC分类号： G11B5/17 ,  G11B5/31

CPC分类号： G11B5/3163 ,  G11B5/313 ,  G11B5/17

摘要： A thin film magnetic head has individual coils series-connected to one another and formed with three connecting terminals selectively connectable to an external driver to effect magnetic reading and writing operation. The magnetic head has 2n (n being an integer of not less than 1) spiral patterns formed by a selective plating method, n spiral patterns out of the 2n spiral patterns being connected in series so that a first connecting terminal and an intermediate connecting terminal are formed to thus give a first coil, the remaining n spiral patterns out of the 2n spiral patterns being connected in series so that one end thereof is connected to the intermediate connecting terminal and the other end serves as a second connecting terminal to thus give a second coil, wherein the 2n spiral patterns are formed on n layers and each layer has two spiral patterns, one of which is a component of the first coil and the other of which is a component of the second coil.

摘要翻译： 薄膜磁头具有彼此串联连接的单独的线圈，并且形成有可选择地连接到外部驱动器的三个连接端子，以实现磁读取和写入操作。 磁头具有通过选择性电镀法形成的2n（n为1以上的整数）的螺旋图案，2n个螺旋图案中的n个螺旋图案串联连接，使得第一连接端子和中间连接端子 形成为形成第一线圈，2n个螺旋图案中的其余n个螺旋图案被串联连接，使得其一端连接到中间连接端子，另一端用作第二连接端子，从而产生第二线圈 线圈，其中2n个螺旋图案形成在n个层上，每个层具有两个螺旋图案，其中一个是第一线圈的分量，另一个是第二线圈的分量。