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1. 发明授权

US06327121B1 GMR head, method for its manufacture, and magnetic disc drive utilizing the head 失效
标题翻译： GMR头，其制造方法和利用磁头的磁盘驱动器
公开(公告)号：US06327121B1
公开(公告)日：2001-12-04
申请号：US09191940
申请日：1998-11-13
申请人： Keiichi Nagasawa , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka , Reiko Kondoh
发明人： Keiichi Nagasawa , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka , Reiko Kondoh
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3903 , G11B5/3929 , G11B5/3945 , G11B2005/3996 , Y10S977/934
摘要： The invention provides a GMR head in which an adequate bias point may be set for the free magnetic layer 12 of the GMR head by suppressing the static magnetic field in the free magnetic layer which arises from a pinned magnetic layer 14 of the GMR head. The GMR head comprises a sensor section 10, a magnetic field correction section 20 disposed laterally adjacent to the sensor section 10. The sensor section 10 includes, in addition to the free magnetic layer 12 and the pinned magnetic layer 14, an intermediate layer 13 and an anti-ferromagnetic layer 15 in a specific arrangement. The magnetic field correction section 20 may have the same structure as the sensor section 10. Because the sensor section 10 and the magnetic field correction section 20 are provided independently and disposed laterally adjacent to each other in the direction of height of the GMR head, the magnetic field emerging from the pinned magnetic layer 14 into the free magnetic layer 12 is suppressed by the magnetic field correction section 20. The magnetic field correction section 20 may be easily formed together and simultaneously with the sensor section 10.
摘要翻译：本发明提供一种GMR头，其中可以通过抑制由GMR头的钉扎磁性层14产生的自由磁性层中的静态磁场，为GMR头的自由磁性层12设置适当的偏置点。 GMR头包括传感器部分10，与传感器部分10相邻设置的磁场校正部分20.传感器部分10除了自由磁性层12和固定磁性层14之外还包括中间层13和具有特定布置的反铁磁层15。磁场校正部20可以具有与传感器部10相同的结构。由于传感器部10和磁场校正部20独立地设置并且在GMR头的高度方向上彼此横向相邻设置，通过磁场校正部20抑制从被钉扎磁性层14向自由磁性层12出射的磁场。磁场校正部20可以容易地与传感器部10一起形成。

2. 发明授权

US06355115B1 Spin-valve magnetic head with the pinned layer having different directions for its magnetization axis and its easy axis 失效
标题翻译：旋转磁头磁头，其固定层具有不同的方向，用于其磁化轴和易轴
公开(公告)号：US06355115B1
公开(公告)日：2002-03-12
申请号：US09434094
申请日：1999-11-05
申请人： Keiichi Nagasaka , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka
发明人： Keiichi Nagasaka , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka
IPC分类号： C21D104
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B2005/3996 , Y10T29/49034
摘要： A method is disclosed for fabricating a spin-valve magnetic head including a layered body of a first ferromagnetic layer having a first easy axis of magnetization extending in a first direction, a non-magnetic layer formed on the first ferromagnetic layer, a second ferromagnetic layer provided on the non-magnetic layer, and an anti-ferromagnetic layer provided on the second ferromagnetic layer in exchange coupling therewith. The method includes a first thermal annealing process with the steps of annealing the layered body in a first annealing state and applying a magnetic field to the layered body in a second direction different from the first direction, while maintaining the layered body in the first annealing state. The method further includes a second thermal annealing process with the steps of annealing the layered body, after the first thermal annealing process, in a second annealing state and applying a magnetic field in a third direction different from the second direction while maintaining the layered body in the second annealing state.
摘要翻译：公开了一种用于制造自旋阀磁头的方法，该自旋阀磁头包括具有沿第一方向延伸的第一容易磁化轴的第一铁磁层的层叠体，形成在第一铁磁层上的非磁性层，第二铁磁层设置在非磁性层上，以及设置在第二铁磁层上的与反铁磁层交换耦合的反铁磁层。该方法包括：第一热退火处理，其具有以第一退火状态退火层叠体的步骤，并且在不同于第一方向的第二方向上向层叠体施加磁场，同时将层状体保持在第一退火状态。该方法还包括第二热退火处理，其中在第一热退火处理之后退火分层体处于第二退火状态，并且在不同于第二方向的第三方向施加磁场，同时将层状体保持在第二退火状态。

3. 发明授权

US07116533B2 Magnetoresistive sensor 失效
标题翻译：磁阻传感器
公开(公告)号：US07116533B2
公开(公告)日：2006-10-03
申请号：US11327676
申请日：2006-01-06
申请人： Yoshihiko Seyama , Atsushi Tanaka , Keiichi Nagasaka , Yutaka Shimizu , Shin Eguchi , Hitoshi Kanai , Reiko Kondo , Hitoshi Kishi , Junya Ikeda
发明人： Yoshihiko Seyama , Atsushi Tanaka , Keiichi Nagasaka , Yutaka Shimizu , Shin Eguchi , Hitoshi Kanai , Reiko Kondo , Hitoshi Kishi , Junya Ikeda
IPC分类号： G11B5/127
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/3903 , G11B2005/3996 , H01F10/3259 , H01F10/3268 , H01F10/3295
摘要： A magnetoresistive sensor including the following layers, in order: a first conductor layer; a first antiferromagnetic layer; a first pinned ferromagnetic layer; a first nonmagnetic intermediate layer; a free ferromagnetic layer; a second nonmagnetic intermediate layer; a second pinned ferromagnetic layer; a second antiferromagnetic layer; and a second conductor layer. Alternatively, the magnetoresistive sensor may include the following layers, in order: a first conductor layer; a first free ferromagnetic layer; a first nonmagnetic intermediate layer; a first pinned ferromagnetic layer; an antiferromagnetic layer; a second pinned ferromagnetic layer; a second nonmagnetic intermediate layer; a second free ferromagnetic layer; and a second conductor layer.
摘要翻译：一种磁阻传感器，包括以下层：第一导体层; 第一反铁磁层; 第一固定铁磁层; 第一非磁性中间层; 自由铁磁层; 第二非磁性中间层; 第二钉扎铁磁层; 第二反铁磁层; 和第二导体层。或者，磁阻传感器可以依次包括以下层：第一导体层; 第一自由铁磁层; 第一非磁性中间层; 第一固定铁磁层; 反铁磁层; 第二钉扎铁磁层; 第二非磁性中间层; 第二自由铁磁层; 和第二导体层。

4. 发明授权

US06995960B2 Spin valve magnetoresistive sensor having CPP structure 失效
公开(公告)号：US06995960B2
公开(公告)日：2006-02-07
申请号：US09820047
申请日：2001-03-28
申请人： Yoshihiko Seyama , Atsushi Tanaka , Keiichi Nagasaka , Yutaka Shimizu , Shin Eguchi , Hitoshi Kanai , Reiko Kondo , Hitoshi Kishi , Junya Ikeda
发明人： Yoshihiko Seyama , Atsushi Tanaka , Keiichi Nagasaka , Yutaka Shimizu , Shin Eguchi , Hitoshi Kanai , Reiko Kondo , Hitoshi Kishi , Junya Ikeda
IPC分类号： G11B5/127
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/3903 , G11B2005/3996 , H01F10/3259 , H01F10/3268 , H01F10/3295
摘要： Disclosed herein is a spin valve magnetoresistive sensor including a first conductor layer, a free ferromagnetic layer provided on the first conductor layer, a nonmagnetic intermediate layer provided on the free ferromagnetic layer, a pinned ferromagnetic layer provided on the nonmagnetic intermediate layer, an antiferromagnetic layer provided on the pinned ferromagnetic layer, and a second conductor layer provided on the antiferromagnetic layer. At least one of the free ferromagnetic layer and the pinned ferromagnetic layer has a thickness larger than that providing a maximum resistance change rate or resistance change amount in the case of passing a current in an in-plane direction of the at least one layer. That is, the thickness of at least one of the free ferromagnetic layer and the pinned ferromagnetic layer falls in the range of 3 nm to 12 nm.

5. 发明授权

US6034845A Spin-valve magnetic head with the pinned layer having different directions for its magnetization axis and its easy axis 失效
标题翻译：旋转磁头磁头，其固定层具有不同的方向，用于其磁化轴和易轴
公开(公告)号：US6034845A
公开(公告)日：2000-03-07
申请号：US24074
申请日：1998-02-17
申请人： Keiichi Nagasaka , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka
发明人： Keiichi Nagasaka , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka
IPC分类号： G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B2005/3996 , Y10T29/49034
摘要： A spin-valve magnetic head has a first ferromagnetic layer with a first easy axis of magnetization extending in a first direction, and a second ferromagnetic layer provided on, and separated from, the first ferromagnetic layer. The second ferromagnetic layer has a magnetization in a second direction substantially perpendicular to the first direction. The magnetization defines a line in the second direction. An anti-ferromagnetic layer provided on the second ferromagnetic layer is exchange coupled to the second ferromagnetic layer. The second ferromagnetic layer has a second easy axis of magnetization extending in a direction intersecting the line in the second direction.
摘要翻译：自旋阀磁头具有第一铁磁层，其具有在第一方向上延伸的第一容易磁化轴，以及设置在第一铁磁层上并与第一铁磁层分离的第二铁磁层。第二铁磁层在基本上垂直于第一方向的第二方向上具有磁化。磁化在第二个方向上定义一条线。设置在第二铁磁层上的反铁磁层交换耦合到第二铁磁层。第二铁磁层具有在与第二方向上的线交叉的方向上延伸的第二易磁化轴。

6. 发明申请

US20060119989A1 SPIN VALVE MAGNETORESISTIVE SENSOR HAVING CPP STRUCTURE 失效
标题翻译：具有CPP结构的旋转阀磁传感器
公开(公告)号：US20060119989A1
公开(公告)日：2006-06-08
申请号：US11327676
申请日：2006-01-06
申请人： Yoshihiko Seyama , Atsushi Tanaka , Keiichi Nagasaka , Yutaka Shimizu , Shin Eguchi , Hitoshi Kanai , Reiko Kondo , Hitoshi Kishi , Junya Ikeda
发明人： Yoshihiko Seyama , Atsushi Tanaka , Keiichi Nagasaka , Yutaka Shimizu , Shin Eguchi , Hitoshi Kanai , Reiko Kondo , Hitoshi Kishi , Junya Ikeda
IPC分类号： G11B5/127 , G11B5/33
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/3903 , G11B2005/3996 , H01F10/3259 , H01F10/3268 , H01F10/3295
摘要： Disclosed herein is a spin valve magnetoresistive sensor including a first conductor layer, a free ferromagnetic layer provided on the first conductor layer, a nonmagnetic intermediate layer provided on the free ferromagnetic layer, a pinned ferromagnetic layer provided on the nonmagnetic intermediate layer, an antiferromagnetic layer provided on the pinned ferromagnetic layer, and a second conductor layer provided on the antiferromagnetic layer. At least one of the free ferromagnetic layer and the pinned ferromagnetic layer has a thickness larger than that providing a maximum resistance change rate or resistance change amount in the case of passing a current in an in-plane direction of the at least one layer. That is, the thickness of at least one of the free ferromagnetic layer and the pinned ferromagnetic layer falls in the range of 3 nm to 12 nm.
摘要翻译：本文公开了一种自旋阀磁阻传感器，其包括第一导体层，设置在第一导体层上的自由铁磁层，设置在自由铁磁层上的非磁性中间层，设置在非磁性中间层上的钉扎铁磁层，反铁磁层设置在被钉扎的铁磁层上，以及设置在反铁磁层上的第二导体层。自由铁磁层和被钉扎的铁磁层中的至少一个具有大于在通过至少一个层的面内方向的电流的情况下提供最大电阻变化率或电阻变化量的厚度的厚度。也就是说，自由铁磁层和被钉扎铁磁层中的至少一个的厚度落在3nm至12nm的范围内。

7. 发明授权

US06364961B1 Spin-valve magnetic head with the pinned layer having different directions for its magnetization axis and its easy axis 失效
标题翻译：旋转磁头磁头，其固定层具有不同的方向，用于其磁化轴和易轴
公开(公告)号：US06364961B1
公开(公告)日：2002-04-02
申请号：US09434989
申请日：1999-11-05
申请人： Keiichi Nagasaka , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka
发明人： Keiichi Nagasaka , Yutaka Shimizu , Hitoshi Kishi , Atsushi Tanaka
IPC分类号： H01F1032
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B2005/3996 , Y10T29/49034
摘要： A method is disclosed for magnetizing a magnetic system including a ferromagnetic layer magnetized in a first direction and an anti-ferromagnetic layer provided on said ferromagnetic layer in exchange coupling therewith. The method includes a first thermal annealing process including the sub-steps of annealing the magnetic system in a first annealing state, and applying a magnetic field to the magnetic system in a second direction different from the first direction, while maintaining the magnetic system in the first annealing state. A second thermal annealing process includes the sub-steps of annealing the magnetic system after the first thermal annealing process, to a second annealing state, and applying a magnetic field in a third direction different from the second direction while maintaining the magnetic system in the second annealing state.
摘要翻译：公开了一种用于磁化磁性系统的方法，所述磁系统包括沿第一方向被磁化的铁磁层和设置在所述铁磁层上的反铁磁层，以与其交换耦合。该方法包括第一热退火处理，其包括在第一退火状态退火磁系统的子步骤，以及在与第一方向不同的第二方向上向磁系统施加磁场，同时将磁系统保持在第一退火状态。第二热退火处理包括将第一热退火处理后的磁系退火至第二退火状态的子步骤，以及在与第二方向不同的第三方向上施加磁场，同时将磁系统保持在第二退火状态退火状态。

8. 发明授权

US07450351B2 Magnetoresistive element having current-perpendicular-to-plane structure, magnetic head, and magnetic memory apparatus thereof 失效
标题翻译：具有电流 - 垂直于平面结构的磁阻元件，磁头及其磁存储装置
公开(公告)号：US07450351B2
公开(公告)日：2008-11-11
申请号：US11156870
申请日：2005-06-20
申请人： Hirotaka Oshima , Keiichi Nagasaka , Arata Jogo , Yutaka Shimizu , Atsushi Tanaka
发明人： Hirotaka Oshima , Keiichi Nagasaka , Arata Jogo , Yutaka Shimizu , Atsushi Tanaka
IPC分类号： G11B5/33
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/3903 , H01F10/14 , H01F10/30 , H01F10/3272 , H01L43/08 , H01L43/10
摘要： A magnetoresistive element of a CPP type configuration including a fixed magnetic layer, a first non-magnetic layer, a free magnetic layer, and a second non-magnetic layer is disclosed. The magnetoresistive element includes a first interface layer situated between the free magnetic layer and the first non-magnetic layer, and a second interface layer situated between the free magnetic layer and the second non-magnetic layer. The first interface layer and the second interface layer include a material mainly having CoNiFe.
摘要翻译：公开了一种包括固定磁性层，第一非磁性层，自由磁性层和第二非磁性层的CPP型结构的磁阻元件。磁阻元件包括位于自由磁性层和第一非磁性层之间的第一界面层和位于自由磁性层和第二非磁性层之间的第二界面层。第一界面层和第二界面层包括主要具有CoNiFe的材料。

9. 发明授权

US07180713B2 Magnetoresistive element 失效
标题翻译：磁阻元件
公开(公告)号：US07180713B2
公开(公告)日：2007-02-20
申请号：US10271428
申请日：2002-10-16
申请人： Keiichi Nagasaka , Yoshihiko Seyama , Takahiko Sugawara , Yutaka Shimizu , Atsushi Tanaka
发明人： Keiichi Nagasaka , Yoshihiko Seyama , Takahiko Sugawara , Yutaka Shimizu , Atsushi Tanaka
IPC分类号： G11B5/33
CPC分类号： H01L43/08 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3903 , G11B5/3909 , H01F10/3254 , H01F10/3259 , H01F10/3263 , H01F10/3268
摘要： A magnetoresistive element that detects a change of magnetoresistance by giving a sense current in the thickness direction of a magnetoresistive effect film including at least a base layer, a free layer, a non-magnetic layer, a pinned layer, a pinning layer, and a protection layer, includes a granular structure layer that includes conductive particles and an insulating matrix material in the form of a thin film containing the conductive particles in a dispersed state and having a smaller thickness than the particle diameter of the conductive particles, the granular structure layer being interposed between at least two adjacent layers among the base layer, the free layer, the non-magnetic layer, the pinned layer, the pinning layer, and the protection layer.
摘要翻译：一种磁阻元件，其通过在至少包括基底层，自由层，非磁性层，被钉扎层，钉扎层和至少一层的磁阻效应膜的厚度方向上提供感测电流来检测磁阻的变化。保护层包括粒状结构层，其包含导电粒子和绝缘基质材料，其为含有分散状态的导电性粒子且厚度小于导电性粒子粒径的薄膜，粒状结构层介于基层，自由层，非磁性层，钉扎层，钉扎层和保护层中的至少两个相邻层之间。

10. 发明授权

US06770386B1 Magnetic recording medium and its manufacturing method 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US06770386B1
公开(公告)日：2004-08-03
申请号：US09654487
申请日：2000-09-01
申请人： Yoshiaki Hara , Takahiko Sugawara , Yutaka Shimizu , Takuya Uzumaki , Atsushi Tanaka
发明人： Yoshiaki Hara , Takahiko Sugawara , Yutaka Shimizu , Takuya Uzumaki , Atsushi Tanaka
IPC分类号： G11B566
CPC分类号： G11B5/82 , G11B5/012 , G11B5/74 , G11B2005/0021 , Y10S428/90 , Y10T428/2495
摘要： A magnetic recording medium with a high recording density has a first ferromagnetic layer, a non-magnetic layer, and a second ferromagnetic layer successively deposited as the recording layer on a non-magnetic substrate. The recording layer is heated in concentric circular shapes to divide it into regions in which the magnetic interactions between the ferromagnetic layers exhibit ferromagnetism and regions that exhibit anti-ferromagnetism. The ferromagnetic regions are used for recording tracks, and the anti-ferromagnetic regions function as guard bands. In this manner track density is increased without roughening the surface of the recording medium.
摘要翻译：具有高记录密度的磁记录介质具有在非磁性基片上作为记录层连续沉积的第一铁磁层，非磁性层和第二铁磁层。记录层被加热成同心圆形以将其分成铁磁层之间的磁相互作用显示出铁磁性的区域和表现出抗铁磁性的区域。铁磁区域用于记录轨道，反铁磁区域用作保护带。以这种方式，轨道密度增加而不会使记录介质的表面变粗糙。

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