公开(公告)号：US20050052794A1

公开(公告)日：2005-03-10

申请号：US10968979

申请日：2004-10-21

申请人： Masatoshi Yoshikawa ,  Masayuki Takagishi ,  Yuzo Kamiguchi ,  Hiromi Yuasa

发明人： Masatoshi Yoshikawa ,  Masayuki Takagishi ,  Yuzo Kamiguchi ,  Hiromi Yuasa

IPC分类号： G11B5/39 ,  G11B5/33 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3929 ,  G11B5/3954 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetoresistive head has a magnetoresistive film including first and second magnetization free layers, an intermediate layer sandwiched between the first and second magnetization free layers, an underlayer and a protective layer, which are stacked in the order of the underlayer, the first magnetization free layer, the intermediate layer, the second magnetization free layer and the protective layer and arranged to be substantially perpendicular to the air-bearing surface, and a first electrode connected with the underlayer and a second electrode connected with the protective layer, the electrodes allowing a current to flow in a direction substantially perpendicular to the plane. Each magnetization direction of the first and second magnetization free layers is allowed to vary independently in response to a signal magnetic flux from a medium. The first and second magnetization free layers produce a magnetoresistance effect in accordance with the magnetization directions thereof.

公开(公告)号：US06757143B2

公开(公告)日：2004-06-29

申请号：US10105342

申请日：2002-03-26

申请人： Tomomi Tunayama ,  Masayuki Takagishi ,  Kohichi Tateyama ,  Yuichi Ohsawa ,  Susumu Hashimoto ,  Michiko Hara ,  Akio Hori

发明人： Tomomi Tunayama ,  Masayuki Takagishi ,  Kohichi Tateyama ,  Yuichi Ohsawa ,  Susumu Hashimoto ,  Michiko Hara ,  Akio Hori

IPC分类号： G11B5127

CPC分类号： H01L27/228 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3903 ,  G11B2005/3996 ,  H01F10/3268 ,  H01L27/224 ,  H01L43/08 ,  Y10T29/49044

摘要： In a magnetoresistive effect element, at least one of electrodes for supplying a current perpendicularly to the film plane of a magnetoresistive effect film is narrower than the distance between bias-applying films. The sensitivity of the magnetoresistive effect film is lower in regions thereof near the bias-applying films due to an intensive bias magnetic field from the bias-applying films. However, the electrodes are disposed in an inner region having a high sensitivity avoiding those regions with a lower sensitivity to ensure a high sensitivity. The electrodes disposed on and under the magnetoresistive effect film are pillar-shaped to concentrate the sense current such that the sense current can be concentrically supplied exclusively to the region with the high sensitivity.

摘要翻译： 在磁阻效应元件中，用于向垂直于磁阻效应膜的膜平面供给电流的电极中的至少一个比偏置施加膜之间的距离窄。 由于来自偏置施加膜的强偏压磁场，磁阻效应膜的敏感性在偏置施加膜附近的区域中较低。 然而，电极设置在具有高灵敏度的内部区域中，避免了具有较低灵敏度的那些区域，以确保高灵敏度。 设置在磁阻效应膜上和下方的电极是柱状的，以集中感测电流，使得感测电流可以同心地提供给具有高灵敏度的区域。

公开(公告)号：US06266216B1

公开(公告)日：2001-07-24

申请号：US08965811

申请日：1997-11-07

申请人： Fuminori Hikami ,  Kenji Komaki ,  Masayuki Takagishi

发明人： Fuminori Hikami ,  Kenji Komaki ,  Masayuki Takagishi

IPC分类号： G11B531

CPC分类号： G11B5/3967 ,  G11B5/09

摘要： An inductive/MR composite type thin-film magnetic head. In one embodiment, the inductive/MR composite type thin-film magnetic head is equipped with an inductive head used for writing. The inductive head includes an insulating film and a conductive coil that are laminated between upper and lower magnetic films. The inductive/MR composite type thin-film magnetic head also includes a magnetic resistance (MR) head used for read-out. The inductive/MR composite type thin-film magnetic head is characterized by the fact that a distance L between [i] the upper and lower magnetic poles, which face each other across a magnetic gap at the tip ends of the aforementioned upper and lower magnetic films and [ii] the point where the aforementioned upper and lower magnetic films are joined together has the relationship of L

摘要翻译： 电感/ MR复合型薄膜磁头。 在一个实施例中，电感/ MR复合型薄膜磁头配备有用于书写的感应头。 感应头包括层叠在上下磁性膜之间的绝缘膜和导电线圈。 感应/ MR复合型薄膜磁头还包括用于读出的磁阻（MR）头。 电感/ MR复合型薄膜磁头的特征在于，上述上磁极和下磁极之间的上磁极和下磁极之间的距离L彼此相对地跨越上述上下磁头的前端的磁隙 薄膜，[ii]上述上下磁性膜结合在一起的点相对于上述薄膜磁头的期望数据传输速率X（Mbit / sec）具有L <8400 / X的关系 。 在一个实施方案中，L小于或等于60微米。

公开(公告)号：US5969911A

公开(公告)日：1999-10-19

申请号：US35778

申请日：1998-03-04

申请人： Fuminori Hikami ,  Masayuki Takagishi

发明人： Fuminori Hikami ,  Masayuki Takagishi

IPC分类号： G11B5/11 ,  G11B5/31 ,  G11B5/39 ,  G11B5/127 ,  G11B5/10 ,  G11B5/147

CPC分类号： G11B5/3967 ,  G11B5/313

摘要： An inductive/MR composite type thin film magnetic head which realizes high speed, high density recording while at the same time preventing the occurrence of read-out error by reducing NLTS. In one embodiment an inductive/MR composite type thin-film magnetic head is equipped with [a] an inductive head used for writing in which a magnetic gap layer, a conductive coil and insulating layers are laminated between upper and lower magnetic films, and [b] a magnetic resistance (MR) head used for read-out consisting of an MR element sandwiched between an upper shield which also serves as the aforementioned lower magnetic film, and a lower shield, the aforementioned conductive coil is formed in the shape of a solenoid which is wrapped around the aforementioned upper magnetic film by forming a lower coil part consisting of numerous segments on the surface of the first insulating layer, and then forming an upper coil part consisting of numerous segments from a point above a second insulating layer, upper magnetic film and third insulating layer laminated on the surface of the lower coil part, so that the respective end portions of the segments of the upper coil part are alternately connected with the respective end portions of the segments of the lower coil part.

摘要翻译： 一种电感/ MR复合型薄膜磁头，实现高速，高密度记录，同时通过减少NLTS来防止读出错误的发生。 在一个实施例中，电感/ MR复合型薄膜磁头配备有[a]用于写入的感应头，其中磁隙层，导电线圈和绝缘层层叠在上磁膜和下磁膜之间， b]用于读出的磁阻头（MR）头，其由夹在上面的上部屏蔽件之间的MR元件和下部屏蔽件组成，上述导电线圈形成为 螺线管，其通过在第一绝缘层的表面上形成由多个段组成的下线圈部分，然后由第二绝缘层上方的点形成由多个段组成的上线圈部分，缠绕在上述上磁膜上， 磁性膜和第三绝缘层层压在下线圈部分的表面上，使得上部线圈部分的段的各个端部交替地为c 与下线圈部分的各段的相应端部连接。

公开(公告)号：US08553359B2

公开(公告)日：2013-10-08

申请号：US12853690

申请日：2010-08-10

申请人： Kenichiro Yamada ,  Katsuhiko Koui ,  Mariko Kitazaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Soichi Oikawa ,  Akihiko Takeo

发明人： Kenichiro Yamada ,  Katsuhiko Koui ,  Mariko Kitazaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Soichi Oikawa ,  Akihiko Takeo

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  B82Y10/00 ,  G11B5/11 ,  G11B5/315 ,  G11B5/743

摘要： A magnetic recording head includes a magnetic pole, a spin torque oscillator, a first shield and a second shield. The magnetic pole has an air-bearing surface. The spin torque oscillator is provided so that a first side of the spin torque oscillator faces the magnetic pole in a first direction parallel to the air-bearing surface. The first shield includes a granular magnetic material, and is provided so that two portions of the first shield sandwich the spin torque oscillator in a second direction which is parallel to the air-bearing surface and perpendicular to the first direction. The second shield is provided on a second side of the spin torque oscillator opposite to the first side.

摘要翻译： 磁记录头包括磁极，自旋转矩振荡器，第一屏蔽和第二屏蔽。 磁极具有空气轴承表面。 旋转扭矩振荡器被设置成使得旋转扭矩振荡器的第一侧在平行于空气轴承表面的第一方向上面对磁极。 第一屏蔽包括颗粒状磁性材料，并且被设置成使得第一屏蔽的两个部分在平行于空气轴承表面并垂直于第一方向的第二方向上夹住旋转扭矩振荡器。 第二屏蔽设置在与第一侧相反的自旋扭矩振荡器的第二侧上。

公开(公告)号：US08233230B2

公开(公告)日：2012-07-31

申请号：US12693201

申请日：2010-01-25

申请人： Koji Yano ,  Kazuhito Shimomura ,  Akihiko Takeo ,  Masayuki Takagishi ,  Kenichiro Yamada

发明人： Koji Yano ,  Kazuhito Shimomura ,  Akihiko Takeo ,  Masayuki Takagishi ,  Kenichiro Yamada

IPC分类号： G11B21/02

CPC分类号： G11B5/02 ,  G11B5/314 ,  G11B2005/001 ,  G11B2005/0024

摘要： According to one embodiment, a disk drive has a magnetic disk and a magnetic head having a spin-torque oscillator. The disk drive further has a head amplifier IC configured to supply a write signal and a drive signal to the magnetic head. The write signal corresponds to write data. The drive signal is supplied to generate a high-frequency magnetic field. The head amplifier IC continuously supplies a drive signal of normal level to the spin-torque oscillator, and supplies a drive signal of high level higher than the normal level, only for a prescribed time after the polarity inversion of the write signal.

摘要翻译： 根据一个实施例，盘驱动器具有磁盘和具有自旋扭矩振荡器的磁头。 磁盘驱动器还具有被配置为向磁头提供写信号和驱动信号的磁头放大器IC。 写入信号对应于写入数据。 提供驱动信号以产生高频磁场。 头放大器IC连续向自旋转矩振荡器提供正常电平的驱动信号，并且在写入信号的极性反转之后的规定时间内提供高于正常电平的高电平的驱动信号。

公开(公告)号：US20080106826A1

公开(公告)日：2008-05-08

申请号：US11965177

申请日：2007-12-27

申请人： Tomomi Funayama ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Kohichi Tateyama

发明人： Tomomi Funayama ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Kohichi Tateyama

IPC分类号： G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3906 ,  G11B5/398 ,  G11B5/3983 ,  G11B2005/3996 ,  H01F10/3259 ,  H01F10/3263 ,  H01L43/08

摘要： A magnetoresistance effect element of the dual spin valve type using a current-perpendicular-to-the-plane (CPP) system where a sensing current flows perpendicular to the stacked faces of a plurality of conductive layers, the magnetoresistance effect element comprises a first unit which includes a free layer and a first pinning layer, a second unit which includes the free layer shared with the first unit and a second pinning layer, a first current control layer which is provided in the first unit and limits the flow quantity of the sensing current, and a second current control layer which is provided in the second unit and limits the flow quantity of the sensing current.

摘要翻译： 使用电流垂直于平面（CPP）系统的双自旋阀类型的磁阻效应元件，其中感测电流垂直于多个导电层的堆叠面流动，磁阻效应元件包括第一单元 其包括自由层和第一钉扎层，第二单元，其包括与第一单元共享的自由层和第二钉扎层，第一电流控制层，设置在第一单元中并限制感测的流量 电流和第二电流控制层，其设置在第二单元中并限制感测电流的流量。

公开(公告)号：US20080106825A1

公开(公告)日：2008-05-08

申请号：US11965123

申请日：2007-12-27

申请人： Tomomi Funayama ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Kohichi Tateyama

发明人： Tomomi Funayama ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Kohichi Tateyama

IPC分类号： G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3906 ,  G11B5/398 ,  G11B5/3983 ,  G11B2005/3996 ,  H01F10/3259 ,  H01F10/3263 ,  H01L43/08

摘要： A magnetoresistance effect element of the dual spin valve type using a current-perpendicular-to-the-plane (CPP) system where a sensing current flows perpendicular to the stacked faces of a plurality of conductive layers, the magnetoresistance effect element comprises a first unit which includes a free layer and a first pinning layer, a second unit which includes the free layer shared with the first unit and a second pinning layer, a first current control layer which is provided in the first unit and limits the flow quantity of the sensing current, and a second current control layer which is provided in the second unit and limits the flow quantity of the sensing current.

摘要翻译： 使用电流垂直于平面（CPP）系统的双自旋阀类型的磁阻效应元件，其中感测电流垂直于多个导电层的堆叠面流动，磁阻效应元件包括第一单元 其包括自由层和第一钉扎层，第二单元，其包括与第一单元共享的自由层和第二钉扎层，第一电流控制层，设置在第一单元中并限制感测的流量 电流和第二电流控制层，其设置在第二单元中并限制感测电流的流量。

公开(公告)号：US07277262B2

公开(公告)日：2007-10-02

申请号：US10932338

申请日：2004-09-02

申请人： Masayuki Takagishi ,  Tomomi Funayama ,  Yoichiro Tanaka

发明人： Masayuki Takagishi ,  Tomomi Funayama ,  Yoichiro Tanaka

IPC分类号： G11B5/39

CPC分类号： G11B5/3912

摘要： A magnetic recording/reproducing apparatus has a magnetoresistive head having a magnetoresistive film through which a current is flowed in a direction substantially perpendicular to a film plane and a pair of magnetic shields disposed to sandwich the magnetoresistive film, and a preamplifier which supplies a sense current to the magnetoresistive head in constant-current driving.

摘要翻译： 磁记录/再现装置具有磁阻头，该磁阻头具有磁阻膜，电流沿着基本上垂直于膜平面的方向流动，一对磁屏蔽设置成夹在磁阻膜上，前置放大器提供感测电流 到恒流驱动中的磁阻头。

公开(公告)号：US07016169B2

公开(公告)日：2006-03-21

申请号：US10968958

申请日：2004-10-21

申请人： Masatoshi Yoshikawa ,  Masayuki Takagishi ,  Yuzo Kamiguchi ,  Hiromi Yuasa

发明人： Masatoshi Yoshikawa ,  Masayuki Takagishi ,  Yuzo Kamiguchi ,  Hiromi Yuasa

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3929 ,  G11B5/3954 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetoresistive head has a magnetoresistive film including first and second magnetization free layers, an intermediate layer sandwiched between the first and second magnetization free layers, an underlayer and a protective layer, a first electrode, a second electrode, a pair of first antiferromagnetic films, and a pair of second antiferromagnetic films. The first electrode is connected with the underlayer and the second electrode is connected with the protective layer, the electrodes allowing a current to flow in a direction substantially perpendicular to the plane of the magnetoresistive film. The pair of first antiferromagnetic films imparts a magnetic bias to the first magnetization free layer in a predetermined direction, and the pair of second antiferromagnetic films imparts a magnetic bias to the second magnetization free layer in a predetermined direction.

摘要翻译： 磁阻头具有包括第一和第二磁化自由层的磁阻膜，夹在第一和第二磁化自由层之间的中间层，底层和保护层，第一电极，第二电极，一对第一反铁磁膜， 和一对第二反铁磁膜。 第一电极与底层连接，第二电极与保护层连接，电极允许电流在基本垂直于磁阻膜的平面的方向上流动。 一对第一反铁磁膜在预定方向上向第一磁化自由层施加磁偏压，并且该对第二反铁磁膜在预定方向上给予第二磁化自由层的磁偏置。