公开(公告)号：US07042319B2

公开(公告)日：2006-05-09

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： H01H51/22

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 includes 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 the thin-film coil, 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体，其特征在于，磁轭包括与第一磁轭接触的第一磁轭和第二磁轭，第一磁轭位于 在薄膜线圈的绕组的中心处，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，并且与薄膜线圈的至少一部分重叠 薄膜线圈。

公开(公告)号：US07023659B2

公开(公告)日：2006-04-04

申请号：US10815069

申请日：2004-03-31

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

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

IPC分类号： G11B5/147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3143 ,  G11B5/3163 ,  G11B5/3967 ,  G11B5/40 ,  G11B2005/3996 ,  Y10T29/49044

摘要： By inserting a first antistripping layer comprising a first non-magnetic layer 22 and a first conductive layer 23 between a first magnetic layer 16 and a magnetic separation layer 13, adhesion between the first conductive layer 23 and the magnetic separation layer 13 is improved to prevent the first magnetic layer 16 from stripping. In addition, by inserting a second antistripping layer comprising a second non-magnetic layer 24 and a second conductive layer 25 between a second magnetic layer 21 and a magnetic gap layer 17, adhesion between the second conductive layer 24 and the magnetic gap layer 17 is improved to prevent the second magnetic layer 25 from stripping.

公开(公告)号：US20060007606A1

公开(公告)日：2006-01-12

申请号：US11227143

申请日：2005-09-16

申请人： Kazuhiko Hayashi ,  Junichi Fujikata ,  Tsutomu Ishi ,  Shigeru Mori ,  Keishi Ohashi ,  Masafumi Nakada ,  Kiyokazu Nagahara ,  Kunihiko Ishihara ,  Nobuyuki Ishiwata

发明人： Kazuhiko Hayashi ,  Junichi Fujikata ,  Tsutomu Ishi ,  Shigeru Mori ,  Keishi Ohashi ,  Masafumi Nakada ,  Kiyokazu Nagahara ,  Kunihiko Ishihara ,  Nobuyuki Ishiwata

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R31/3171 ,  G01R33/093 ,  G11B5/00 ,  G11B5/39 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3967 ,  H01F10/3268

摘要： A magneto-resistance effect head is provided with a lower conductive layer which is provided with a recessed portion, and a vertical bias layer is provided in the recessed portion. A free layer is provided on the lower conductive layer. On the free layer, layered in the following order are the non-magnetic layer, the fixed layer, the fixing layer, and the upper layer so as not to be placed immediately above the vertical bias layer. The non-magnetic layer, the fixed layer, the fixing layer, and the upper layer are buried in an insulation layer. Furthermore, an upper conductive layer is provided on the upper layer and the insulation layer. In the direction of the magnetic field applied by the vertical bias layer, the free layer is made greater in length than the fixed layer and the free layer is disposed in proximity to the vertical bias layer with the distance between the fixed layer and the vertical bias layer remaining unchanged.

公开(公告)号：US06903908B2

公开(公告)日：2005-06-07

申请号：US09853622

申请日：2001-05-14

申请人： Kazuhiko Hayashi ,  Keishi Ohashi ,  Nobuyuki Ishiwata ,  Masafumi Nakada ,  Eizo Fukami ,  Kiyokazu Nagahara ,  Hiroaki Honjo ,  Junichi Fujikata ,  Kunihiko Ishihara ,  Shigeru Mori

发明人： Kazuhiko Hayashi ,  Keishi Ohashi ,  Nobuyuki Ishiwata ,  Masafumi Nakada ,  Eizo Fukami ,  Kiyokazu Nagahara ,  Hiroaki Honjo ,  Junichi Fujikata ,  Kunihiko Ishihara ,  Shigeru Mori

IPC分类号： G01R33/02 ,  G01R31/317 ,  G01R33/09 ,  G11B5/00 ,  G11B5/39 ,  G11B5/40 ,  H01F10/16 ,  H01F10/32 ,  H01L43/08 ,  H01L43/12 ,  G11B5/11

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R31/3171 ,  G01R33/093 ,  G11B5/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/40 ,  G11B2005/3996

摘要： A magnetoresistive effect sensor uses a shielded-type magnetoresistive effect element using a magnetoresistive effect film formed by a basic configuration of a combination of a free layer, a barrier layer formed on the free layer, and a fixed layer formed on the barrier layer, wherein a sensing current flows substantially perpendicular to the magnetoresistive effect film, and wherein an amorphous material or a microcrystalline material is used in a lower shield.

摘要翻译： 磁阻效应传感器使用屏蔽型磁阻效应元件，其使用由自由层，形成在自由层上的阻挡层和形成在阻挡层上的固定层的组合的基本结构形成的磁阻效应膜，其中 感测电流基本上垂直于磁阻效应膜流动，并且其中在下屏蔽中使用无定形材料或微晶材料。

公开(公告)号：US06718621B1

公开(公告)日：2004-04-13

申请号：US09566971

申请日：2000-05-09

申请人： Kazuhiko Hayashi ,  Keishi Ohashi ,  Nobuyuki Ishiwata ,  Masafumi Nakada ,  Eizo Fukami ,  Kiyokazu Nagahara ,  Hiroaki Honjo ,  Shinsaku Saitoh

发明人： Kazuhiko Hayashi ,  Keishi Ohashi ,  Nobuyuki Ishiwata ,  Masafumi Nakada ,  Eizo Fukami ,  Kiyokazu Nagahara ,  Hiroaki Honjo ,  Shinsaku Saitoh

IPC分类号： G11B5127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3169 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/40 ,  Y10T29/49034 ,  Y10T29/49036 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048

摘要： In a production process of an MR head using the tunnel junction film basically consisting of a free layer, a barrier layer, and a pinned layer, the resistance between the free layer and the pined layer reduced beforehand and increased afterward up to a resistance value necessary when actually used. While the resistance between the free layer and the pinned layer is low, current can easily flow, suppressing charge up, thus preventing insulation destruction of the barrier layer. This significantly increases a production yield of a recording/reproduction head using a ferromagnetic tunnel junction element.

摘要翻译： 在使用基本上由自由层，阻挡层和钉扎层组成的隧道结膜的MR头的制造过程中，自由层和填充层之间的电阻预先减小并且随后增加到必要的电阻值 当实际使用。 虽然自由层和被钉扎层之间的电阻低，但是电流可以容易地流动，从而抑制充电，从而防止阻挡层的绝缘破坏。 这显着地增加了使用铁磁隧道连接元件的记录/再现头的产量。

公开(公告)号：US06392851B1

公开(公告)日：2002-05-21

申请号：US09400543

申请日：1999-09-21

申请人： Nobuyuki Ishiwata ,  Tsutomu Ishi

发明人： Nobuyuki Ishiwata ,  Tsutomu Ishi

IPC分类号： G11B5187

CPC分类号： G11B5/3903 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3967

摘要： Disclosed is a magnetroresistance effect type complex head including: (1) a magnetroresistance effect head including: a magnetroresistance effect element 15 which includes a central region 12 for detecting a magnetic field from a record medium and a pair of terminal portions 13, 14 for supplying a bias magnetic field and a current to the central region; a pair of magnetic separators 11, 16 confronting each other, sandwiching the magnetroresistance effect element, and each including an insulator; and a first and second magnetic shield films 10, 17 confronting each other, and sandwitching the magnetroresistance effect element and the pair of magnetic separators; (2) an inductive head including: a first magnetic pole film 17 which is also used as the second magnetic shield; a magnetic gap 18 piled up on the first magnetic pole; a second magnetic pole film 19 piled up on the magnetic gap; and a coil pattern for generating a magnetic flux which flows through the first and second magnetic pole films; (3) a pair of pits 20 recessed in a direction perpendicular to an air bearing surface and disposed on both lateral sides of the second magnetic pole film to determine a width of the second magnetic pole film; and (4) a pattern 8 for determining a position of the pair of recesses.

摘要翻译： 公开了一种磁阻效应型复合磁头，其包括：（1）磁阻效应磁头，包括：磁阻效应元件15，其包括用于检测来自记录介质的磁场的中心区域12和用于供给的一对端子部分13,14 偏置磁场和到中心区域的电流; 相互面对的一对磁性分离器11,16，夹持磁阻效应元件，并且各自包括绝缘体; 以及彼此面对的第一和第二磁屏蔽膜10,17，以及对磁阻效应元件和一对磁选机进行开锁; （2）感应头，包括：还用作第二磁屏蔽的第一磁极膜17; 堆积在第一磁极上的磁隙18; 堆叠在磁隙上的第二磁极膜19; 以及用于产生流过第一和第二磁极膜的磁通的线圈图案; （3）在与空气轴承面垂直的方向上凹陷的一对凹坑20，设置在第二磁极膜的两侧，确定第二磁极膜的宽度; 和（4）用于确定该对凹部的位置的图案8。

公开(公告)号：US06267824B1

公开(公告)日：2001-07-31

申请号：US09314129

申请日：1999-05-19

申请人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

发明人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC分类号： C21D104

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/39 ,  G11B5/3903 ,  G11B5/3967 ,  G11B2005/3996

摘要： In a magnetoresistive effect composite head, magnetic shields oppose each other on a slider main body made of a ceramic material through a predetermined gap, and a magnetoresistive effect element is sandwiched and stacked between the magnetic shields with a magnetic spacer layer made of an insulator. A recording head portion uses one of the magnetic shields as a first magnetic pole, and has a second magnetic pole formed on a surface of the first magnetic pole opposite to the magnetoresistive effect element through a magnetic gap, to record information on a recording medium by means of a magnetic field generated in the magnetic gap. The magnetoresistive effect element includes a central region made of a spin-valve element to sense a medium field, and end regions for supplying a bias field and a current to the central region. The second magnetic pole is constituted by a stacked film of first and second magnetic films having different saturation magnetizations. The first and second magnetic films are close to and far from the magnetic gap, respectively. The saturation magnetization of the first magnetic film is set to a value larger than that of the second magnetic film. A method of manufacturing the above head is also disclosed.

摘要翻译： 在磁阻效应复合头中，磁屏蔽通过预定间隙在由陶瓷材料制成的滑动器主体上彼此相对，并且磁阻效应元件被夹在磁屏蔽之间并由绝缘体制成的磁隔离层叠置在磁屏蔽之间。 记录头部分使用磁屏蔽之一作为第一磁极，并且具有通过磁隙形成在与磁阻效应元件相对的第一磁极的表面上的第二磁极，以通过磁记录介质将信息记录在记录介质上 在磁隙中产生的磁场的装置。 磁阻效应元件包括由感应中间场的自旋阀元件制成的中心区域和用于向中心区域提供偏置场和电流的端部区域。 第二磁极由具有不同饱和磁化的第一和第二磁性膜的叠层膜构成。 第一和第二磁性膜分别靠近和远离磁隙。 将第一磁性膜的饱和磁化强度设定为大于第二磁性膜的饱和磁化强度。 还公开了制造上述头的方法。

公开(公告)号：US5641557A

公开(公告)日：1997-06-24

申请号：US520739

申请日：1995-08-29

申请人： Nobuyuki Ishiwata

发明人： Nobuyuki Ishiwata

IPC分类号： G01R33/09 ,  G11B5/31 ,  G11B5/39 ,  H01F10/08 ,  H01F41/32 ,  H01L43/08 ,  H01L43/12 ,  B32B9/00

CPC分类号： H01L43/08 ,  G11B5/3903 ,  G11B5/3932 ,  G11B5/399 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  Y10T428/24917

摘要： A surface structure of a magnetoresistive film involved in a magnetosensitive portion surrounded by a peripheral portion including at least an electrode film and a magnetic film underlying the electrode film for applying a unidirectional magnetic field onto the magnetosensitive portion, side edges of the magnetoresistive film are covered by the magnetic film so as to keep the side edges separate from the electrode film, an insulation film is provided on at least a peripheral area of a top surface of the magnetoresistive film so that a part of the electrode film extends on the insulating film thereby the top surface of the magnetoresistive film is separated by the insulating film from the electrode film so as to keep an effective area of the magnetoresistive film in an actual area thereof.

摘要翻译： 涉及磁阻敏感部分的表面结构，包括由至少包括电极膜的周边部分和用于在磁敏部分上施加单向磁场的电磁膜下面的磁性膜所包围的磁阻部分，覆盖磁阻膜的侧边缘 通过磁性膜将侧边缘与电极膜分离，在磁阻膜的顶面的至少周边区域设置绝缘膜，使得电极膜的一部分在绝缘膜上延伸，由此 磁阻膜的顶面由绝缘膜与电极膜隔开，以便将磁阻膜的有效面积保持在实际的面积上。

公开(公告)号：US5454920A

公开(公告)日：1995-10-03

申请号：US614

申请日：1993-01-05

申请人： Nobuyuki Ishiwata

发明人： Nobuyuki Ishiwata

IPC分类号： C23C14/34 ,  C23C14/54 ,  G11B7/085 ,  H01F10/14 ,  H01F41/18

CPC分类号： H01F10/145 ,  G11B7/08529

摘要： When depositing an alloy film on a substrate by sputtering, a thickness of the deposited alloy film is measured and accumulated with respect to one alloy target. A sputtering power or a sputtering gas pressure is calculated in accordance with a predetermined equation defining a desired saturation magnetostriction using the accumulated thickness. Thus, the sputtering power or sputtering gas pressure is controlled to obtain the desired saturation magnetostriction.

摘要翻译： 当通过溅射在基板上沉积合金膜时，相对于一个合金靶测量和累积沉积的合金膜的厚度。 根据使用积累的厚度限定期望的饱和磁致伸缩的预定方程来计算溅射功率或溅射气体压力。 因此，控制溅射功率或溅射气体压力以获得期望的饱和磁致伸缩。

公开(公告)号：US5404259A

公开(公告)日：1995-04-04

申请号：US966354

申请日：1992-10-26

申请人： Nobuyuki Ishiwata ,  Toshiyuki Okumura ,  Haruo Urai ,  Mitsuo Tamura ,  Masataka Konno

发明人： Nobuyuki Ishiwata ,  Toshiyuki Okumura ,  Haruo Urai ,  Mitsuo Tamura ,  Masataka Konno

IPC分类号： C01G53/00 ,  C04B35/46 ,  G11B5/10 ,  G11B5/105 ,  G11B5/127 ,  G11B5/255 ,  G11B5/147

CPC分类号： G11B5/10 ,  G11B5/105 ,  Y10S428/90

摘要： In order to improve a wear resistance and recording and reproducing properties of a magnetic head which has a magnetic core having a magnetic gap and a penetrated hole, a pair of reinforcing members holding the magnetic core therebetween, each having an opening corresponding to the penetrated hole, and a winding wound onto the magnetic core and the reinforcing members through the penetrated hole and the opening, each of the reinforcing member is a non-magnetic substrate which is made of a ceramic material essentially consisting of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, and 30-80 weight % NiO and having an average grain size of 2 .mu.m or less. Alternatively, another ceramic is used which essentially consists of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, 30-80 weight % NiO, and 0.2-1 weight % Al.sub.2 O.sub.3, and having an average grain size of 2 .mu.m or less, excluding zero.

摘要翻译： 为了提高具有具有磁隙和贯通孔的磁芯的磁头的耐磨性和记录再现特性，一对保持其间的磁芯的加强构件各自具有对应于穿透孔的开口 以及通过穿透孔和开口缠绕在磁芯和加强构件上的绕组，每个加强构件是非磁性基底，其由陶瓷材料制成，该陶瓷材料基本上由2-30重量％的CaO，2 -50重量％的TiO 2和30〜80重量％的NiO，平均粒径为2μm以下。 或者，使用另外的陶瓷，其基本上由2-30重量％的CaO，2-50重量％的TiO 2，30-80重量％的NiO和0.2-1重量％的Al 2 O 3组成，平均粒径为2微米， 少，不包括零。