公开(公告)号：US20110188298A1

公开(公告)日：2011-08-04

申请号：US13062764

申请日：2009-10-16

申请人： Tetsuhiro Suzuki ,  Shunsuke Fukami ,  Kiyokazu Nagahara ,  Norikazu Ohshima ,  Nobuyuki Ishiwata

发明人： Tetsuhiro Suzuki ,  Shunsuke Fukami ,  Kiyokazu Nagahara ,  Norikazu Ohshima ,  Nobuyuki Ishiwata

IPC分类号： G11C11/00 ,  H01L29/82

CPC分类号： H01L43/08 ,  G11C11/161 ,  G11C11/1659 ,  G11C11/1675 ,  G11C19/0808 ,  H01L27/228

摘要： A magnetoresistance element is provided with: a magnetization recording layer that is a ferromagnetic layer. The magnetization recording layer includes: a magnetization reversal region having a reversible magnetization; a first magnetization fixed region connected to a first boundary of the magnetization reversal region and having a magnetization direction fixed in a first direction; and a second magnetization fixed region connected to a second boundary of the magnetization reversal region and having a magnetization direction fixed in a second direction. At least one magnetization reversal facilitation structure which is a structure in which a magnetization is reversed more easily than the remaining portion is provided for a portion of the second magnetization fixed region.

摘要翻译： 磁阻元件具有：作为铁磁层的磁化记录层。 磁化记录层包括：具有可逆磁化强度的磁化反转区域; 第一磁化固定区域，其连接到所述磁化反转区域的第一边界并且具有沿第一方向固定的磁化方向; 以及连接到所述磁化反转区域的第二边界并且具有沿第二方向固定的磁化方向的第二磁化固定区域。 对于第二磁化固定区域的一部分，提供了至少一个磁化反转促进结构，其是磁化反转比剩余部分更容易的结构。

公开(公告)号：US20110129691A1

公开(公告)日：2011-06-02

申请号：US12864056

申请日：2009-01-13

申请人： Nobuyuki Ishiwata ,  Tetsuhiro Suzuki ,  Norikazu Ohshima ,  Kiyokazu Nagahara ,  Shunsuke Fukami

发明人： Nobuyuki Ishiwata ,  Tetsuhiro Suzuki ,  Norikazu Ohshima ,  Kiyokazu Nagahara ,  Shunsuke Fukami

IPC分类号： G11B5/66

CPC分类号： G11C19/0841 ,  B82Y25/00 ,  G11B5/64 ,  G11C11/161 ,  G11C11/1655 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/1675 ,  G11C11/5607 ,  G11C27/00 ,  G11C2211/5615 ,  H01F10/3254 ,  H01F10/3286 ,  H01L27/228 ,  H01L43/08 ,  Y10T428/11 ,  Y10T428/1136 ,  Y10T428/1143

摘要： A domain wall motion element has a magnetic recording layer 10 that is formed of a ferromagnetic film and has a domain wall DW. The magnetic recording layer 10 has: a pair of end regions 11-1 and 11-2 whose magnetization directions are fixed; and a center region 12 sandwiched between the pair of end regions 11-1 and 11-2, in which the domain wall. DW moves. A first trapping site TS1 by which the domain wall DW is trapped is formed at a boundary between the end region 11-1, 11-2 and the center region 12. Furthermore, at least one second trapping site TS2 by which the domain wall DW is trapped is formed within the center region 12.

摘要翻译： 畴壁运动元件具有由铁磁膜形成并具有畴壁DW的磁记录层10。 磁记录层10具有：其磁化方向固定的一对端区11-1和11-2; 以及夹在所述一对端部区域11-1和11-2之间的中心区域12，其中所述畴壁。 DW移动。 在端区域11-1,11-2和中心区域12之间的边界处形成有第一陷阱位置TS1，其中畴壁DW被捕获。此外，至少一个第二陷阱位置TS2，其中域壁DW 被捕获在中心区域12内形成。

公开(公告)号：US20060274456A1

公开(公告)日：2006-12-07

申请号：US11477402

申请日：2006-06-30

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： G11B5/33

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：US20060268467A1

公开(公告)日：2006-11-30

申请号：US11477410

申请日：2006-06-30

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

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

IPC分类号： 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：US20060119982A1

公开(公告)日：2006-06-08

申请号：US11329919

申请日：2006-01-10

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.

摘要翻译： 通过在第一磁性层16和磁分离层13之间插入包括第一非磁性层22和第一导电层23的第一抗锯齿层，改善了第一导电层23和磁性分离层13之间的粘附，以防止 来自剥离的第一磁性层16。 此外，通过在第二磁性层21和磁隙层17之间插入包括第二非磁性层24和第二导电层25的第二抗锯齿层，第二导电层24和磁隙层17之间的粘附是 改进以防止第二磁性层25剥离。

公开(公告)号：US06804088B1

公开(公告)日：2004-10-12

申请号：US09743521

申请日：2001-01-11

申请人： Yoshihiro Nonaka ,  Haruo Urai ,  Nobuyuki Ishiwata ,  Kiyotaka Shimabayashi ,  Tetsuhiro Suzuki ,  Shinsaku Saitho ,  Hiroaki Tachibana ,  Tamaki Toba

发明人： Yoshihiro Nonaka ,  Haruo Urai ,  Nobuyuki Ishiwata ,  Kiyotaka Shimabayashi ,  Tetsuhiro Suzuki ,  Shinsaku Saitho ,  Hiroaki Tachibana ,  Tamaki Toba

IPC分类号： G11B5147

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

摘要： A thin film magnetic head includes a recording pole layer that is divided into a tip portion, a wide rear portion, a flare portion, and a yoke portion as viewed from the air bearing surface (ABS). The tip portion and the wide rear portion directly contact a write gap layer. Part of the wide rear portion has a greater width that the tip portion. The wide rear portion is provided between the tip portion and the flare portion to reduce magnetic reluctance. Accordingly, it is possible to improve the pattern accuracy of the tip portion width by providing the flare portion, which reflects a large quantity of light, far from the ABS, while preventing an increase of the magnetic reluctance.

摘要翻译： 薄膜磁头包括从空气轴承表面（ABS）观察时分为尖端部分，宽后部部分，扩口部分和轭部分的记录极层。 尖端部分和宽后部直接接触写间隙层。 宽后部的一部分具有较大的尖端部分的宽度。 宽的后部设置在尖端部分和扩口部分之间以减小磁阻。 因此，通过在防止磁阻增加的同时设置反射大量光的喇叭部，能够提高尖端部宽度的图案精度。

公开(公告)号：US06780530B2

公开(公告)日：2004-08-24

申请号：US10428836

申请日：2003-05-05

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

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

IPC分类号： B32B900

CPC分类号： B82Y25/00 ,  C22C30/00 ,  G11B5/3109 ,  G11B5/3967 ,  H01F10/007 ,  H01F10/16 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/115

摘要： A magnetic material includes a main component expressed by a general formula CoNiFeX, wherein X is at least one element selected from the group consisting of Cr, Ti, V, Ru, Rh, Pd, Os, Ir and Pt, and wherein weight percentages a, b, c and d of Co, Ni, Fe and X contents, respectively, in the main component are such that 40%≦a≦10%, 5%≦b≦20%, 10%≦c≦30%, and 0%

摘要翻译： 磁性材料包括由通式CoNiFeX表示的主要成分，其中X是选自Cr，Ti，V，Ru，Rh，Pd，Os，Ir和Pt中的至少一种元素，其中重量百分数a 主成分中Co，Ni，Fe，X含量的b，c，d分别为40％<= a <= 10％，5％<= b <= 20％，10％<= c <= 30％，0％

公开(公告)号：US06671140B1

公开(公告)日：2003-12-30

申请号：US09576775

申请日：2000-05-23

申请人： Nobuyuki Ishiwata

发明人： Nobuyuki Ishiwata

IPC分类号： G11B5139

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/0002 ,  G11B2005/0005

摘要： A first magnetic layer (3) is laminated on a magnetic yoke film (2) forming a closed magnetic circuit containing a magnetic gap so as to be magnetically coupled to the magnetic yoke film (2), and a magnetic separation layer (4), a second magnetic layer (5) and an antiferromagnetic layer (6) are laminated on the first magnetic layer (3). Further, a pair of electrodes (1, 7) are formed so that the laminate comprising the above layers is sandwiched between the electrodes. A permanent magnet film 8 is disposed to apply a bias magnetic field to the first magnetic layer (3). The magnetic separation layer (4) is formed of an insulator. Tunnel current is made to flow between the electrodes (1, 7) through the magnetic separation layer (4), and magnetic signals in the magnetic yoke film (2) are detected by using the antiferromagnetic tunnel magnetoresistance effect that the tunnel current is varied in accordance with variation of the difference in the magnetization direction between the first magnetic layer (3) and the second magnetic layer (5).

摘要翻译： 第一磁性层（3）层压在磁轭膜（2）上，形成包含磁隙的闭合磁路以与磁轭膜（2）磁耦合，以及磁分离层（4）， 在第一磁性层（3）上层叠第二磁性层（5）和反铁磁性层（6）。 此外，形成一对电极（1,7），使得包含上述层的层压体夹在电极之间。 设置永磁体膜8以向第一磁性层（3）施加偏置磁场。 磁分离层（4）由绝缘体形成。 使隧道电流通过磁分离层（4）在电极（1,7）之间流动，并且通过使用隧道电流变化的反铁磁隧道磁阻效应来检测磁轭膜（2）中的磁信号 根据第一磁性层（3）和第二磁性层（5）之间的磁化方向的差异的变化。

公开(公告)号：US6125009A

公开(公告)日：2000-09-26

申请号：US979179

申请日：1997-11-26

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： G11B5/31 ,  G11B5/39

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

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：US6026559A

公开(公告)日：2000-02-22

申请号：US225000

申请日：1999-01-04

申请人： Nobuyuki Ishiwata

发明人： Nobuyuki Ishiwata

IPC分类号： G03G15/06 ,  G03G15/10 ,  G11B5/012 ,  G11B5/31 ,  G11B5/39 ,  G11B5/42

CPC分类号： G11B5/3967 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A fabrication process for a complex magnetic head having a reproducing MR head and a recording ID head comprises the steps of forming the MR head, forming an insulator film on the MR head, forming a photoresist frame on the insulator film, forming a top magnetic pole inside the photoresist frame by plating, trimming the top magnetic pole for defining the end width of the ID head while leaving the photoresist frame, and removing the photoresist frame. The photoresist frame protects the underlying films against the trimming and also protects the top magnetic pole film against an etching solution.

摘要翻译： 具有再现MR磁头和记录ID磁头的复磁头的制造方法包括以下步骤：形成MR磁头，在MR磁头上形成绝缘体膜，在绝缘膜上形成光致抗蚀剂框架，形成顶部磁极 通过电镀在光致抗蚀剂框架内部，修剪顶部磁极以限定ID头的端部宽度，同时留下光致抗蚀剂框架，并且去除光致抗蚀剂框架。 光致抗蚀剂框架保护下面的膜免受修剪，并且还保护顶部磁极膜抵抗蚀刻溶液。