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1. 发明授权

US06504690B2 Spin-tunnel magneto-resistance type magnetic sensor 有权
标题翻译：旋转磁阻型磁传感器
公开(公告)号：US06504690B2
公开(公告)日：2003-01-07
申请号：US09767847
申请日：2001-01-24
申请人： Matahiro Komuro , Yoshiaki Kawato
发明人： Matahiro Komuro , Yoshiaki Kawato
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G01R33/098 , G11B5/00 , G11B5/3903 , G11B5/3909 , G11B5/3967 , Y10T29/49044
摘要： A magnetic sensor utilizing a spin tunnel magneto-resistance effect (TMR), comprising a tunnel insulating film, a first magnetic layer formed on one of the planes of the tunnel insulating film, a second magnetic layer formed on the other plane of the tunnel insulating film, a third magnetic layer containing an anti-ferromagnetic substance for fixing magnetization of the second magnetic layer, a second insulating film formed on at least one of the first and third magnetic layers and having an opening in a predetermined region, a first electrode electrically connected to one of the first and third magnetic layers only in the opening of the second insulating film, and a second electrode for causing a current to flow between the first electrode and itself through at least the first and second magnetic layers and the first insulating layer.
摘要翻译：一种利用自旋隧道磁阻效应（TMR）的磁传感器，包括隧道绝缘膜，形成在隧道绝缘膜的一个平面上的第一磁性层，形成在隧道绝缘层的另一平面上的第二磁性层膜，含有用于固定第二磁性层的磁化的反铁磁性物质的第三磁性层，形成在第一和第三磁性层中的至少一个上并且在预定区域中具有开口的第二绝缘膜，第一电极电连接到仅在第二绝缘膜的开口中的第一和第三磁性层中的一个上，以及第二电极，用于使电流至少通过第一和第二磁性层和第一绝缘层在第一电极和自身之间流动。

2. 发明授权

US06587318B2 Spin tunnel magneto-resistance effect type magnetic sensor and production method thereof 失效
公开(公告)号：US06587318B2
公开(公告)日：2003-07-01
申请号：US09987135
申请日：2001-11-13
申请人： Matahiro Komuro , Yoshiaki Kawato
发明人： Matahiro Komuro , Yoshiaki Kawato
IPC分类号： G11B5127
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G01R33/098 , G11B5/00 , G11B5/3903 , G11B5/3909 , G11B5/3967 , Y10T29/49044
摘要： A magnetic sensor utilizing a spin tunnel magneto-resistance effect (TMR), comprising a tunnel insulating film, a first magnetic layer formed on one of the planes of the tunnel insulating film, a second magnetic layer formed on the other plane of the tunnel insulating film, a third magnetic layer containing an anti-ferromagnetic substance for fixing magnetization of the second magnetic layer, a second insulating film formed on at least one of the first and third magnetic layers and having an opening in a predetermined region, a first electrode electrically connected to one of the first and third magnetic layers only in the opening of the second insulating film, and a second electrode for causing a current to flow between the first electrode and itself through at least the first and second magnetic layers and the first insulating layer.

3. 发明授权

US06327107B1 Spin tunnel magneto-resistance effect type magnetic sensor and production method thereof 有权
标题翻译：旋转隧道磁阻效应型磁传感器及其制造方法
公开(公告)号：US06327107B1
公开(公告)日：2001-12-04
申请号：US09302228
申请日：1999-04-29
申请人： Matahiro Komuro , Yoshiaki Kawato
发明人： Matahiro Komuro , Yoshiaki Kawato
IPC分类号： G11B502
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G01R33/098 , G11B5/00 , G11B5/3903 , G11B5/3909 , G11B5/3967 , Y10T29/49044
摘要： A magnetic sensor utilizing a spin tunnel magneto-resistance effect (TMR), comprising a tunnel insulating film, a first magnetic layer formed on one of the planes of the tunnel insulating film, a second magnetic layer formed on the other plane of the tunnel insulating film, a third magnetic layer containing an anti-ferromagnetic substance for fixing magnetization of the second magnetic layer, a second insulating film formed on at least one of the first and third magnetic layers and having an opening in a predetermined region, a first electrode electrically connected to one of the first and third magnetic layers only in the opening of the second insulating film, and a second electrode for causing a current to flow between the first electrode and itself through at least the first and second magnetic layers and the first insulating layer.
摘要翻译：一种利用自旋隧道磁阻效应（TMR）的磁传感器，包括隧道绝缘膜，形成在隧道绝缘膜的一个平面上的第一磁性层，形成在隧道绝缘层的另一平面上的第二磁性层膜，含有用于固定第二磁性层的磁化的反铁磁性物质的第三磁性层，形成在第一和第三磁性层中的至少一个上并且在预定区域中具有开口的第二绝缘膜，第一电极电连接到仅在第二绝缘膜的开口中的第一和第三磁性层中的一个上，以及第二电极，用于使电流至少通过第一和第二磁性层和第一绝缘层在第一电极和自身之间流动。

4. 发明授权

US06325900B1 Spin tunnel magneto-resistance effect type magnetic sensor and production method thereof 有权
公开(公告)号：US06325900B1
公开(公告)日：2001-12-04
申请号：US09650734
申请日：2000-08-30
申请人： Matahiro Komuro , Yoshiaki Kawato
发明人： Matahiro Komuro , Yoshiaki Kawato
IPC分类号： C23C1434
摘要： A magnetic sensor utilizing a spin tunnel magneto-resistance effect (TMR), comprising a tunnel insulating film, a first magnetic layer formed on one of the planes of the tunnel insulating film, a second magnetic layer formed on the other plane of the tunnel insulating film, a third magnetic layer containing an anti-ferromagnetic substance for fixing magnetization of the second magnetic layer, a second insulating film formed on at least one of the first and third magnetic layers and having an opening in a predetermined region, a first electrode electrically connected to one of the first and third magnetic layers only in the opening of the second insulating film, and a second electrode for causing a current to flow between the first electrode and itself through at least the first and second magnetic layers and the first insulating layer.

5. 发明授权

US07813079B2 Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 有权
标题翻译：薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器
公开(公告)号：US07813079B2
公开(公告)日：2010-10-12
申请号：US12255306
申请日：2008-10-21
申请人： Yoshiaki Kawato , Kazuhiro Nakamoto , Hiroyuki Hoshiya , Yasuyuki Okada , Masafumi Mochizuki
发明人： Yoshiaki Kawato , Kazuhiro Nakamoto , Hiroyuki Hoshiya , Yasuyuki Okada , Masafumi Mochizuki
IPC分类号： G11B5/147 , G11B5/127
CPC分类号： G11B5/3906 , G11B5/1278
摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a closed magnetic domain structure in the pole.
摘要翻译：具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生高磁记录场，同时还进行修改以抑制在写入操作之后立即发生的剩余磁场。提供用于向主极提供磁通量的返回路径和用于激励主极和返回路径的导电线圈。主极的极宽为200nm以下，由高饱和磁通密度层和低饱和磁通密度层构成的磁性层叠体。低饱和磁通密度层和高饱和磁通密度通过利用磁极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。

6. 发明申请

US20090059425A1 THIN FILM PERPENDICULAR MAGNETIC RECORDING HEAD, THEIR FABRICATION PROCESS AND MAGNETIC DISK DRIVE USING IT 有权
标题翻译：薄膜电磁记录头，其制造工艺和使用其的磁性磁盘驱动器
公开(公告)号：US20090059425A1
公开(公告)日：2009-03-05
申请号：US12255306
申请日：2008-10-21
申请人： Yoshiaki Kawato , Kazuhiro Nakamoto , Hiroyuki Hoshiya , Yasuyuki Okada , Masafumi Mochizuki
发明人： Yoshiaki Kawato , Kazuhiro Nakamoto , Hiroyuki Hoshiya , Yasuyuki Okada , Masafumi Mochizuki
IPC分类号： G11B5/33
CPC分类号： G11B5/3906 , G11B5/1278
摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a closed magnetic domain structure in the pole.
摘要翻译：具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生高磁记录场，同时还进行修改以抑制在写入操作之后立即发生的剩余磁场。提供用于向主极提供磁通量的返回路径和用于激励主极和返回路径的导电线圈。主极的极宽为200nm以下，由高饱和磁通密度层和低饱和磁通密度层构成的磁性层叠体。低饱和磁通密度层和高饱和磁通密度通过利用磁极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。

7. 发明授权

US07426091B2 Magnetic head 失效
标题翻译：磁头
公开(公告)号：US07426091B2
公开(公告)日：2008-09-16
申请号：US11393684
申请日：2006-03-31
申请人： Yasuyuki Okada , Hiroyuki Hoshiya , Yoshiaki Kawato
发明人： Yasuyuki Okada , Hiroyuki Hoshiya , Yoshiaki Kawato
IPC分类号： G11B5/147
CPC分类号： G11B5/1278
摘要： The disclosed invention provides a magnetic head of high stability in which “erase after write” is prevented. Here is provided a magnetic head comprising a thin-film magnetic head for perpendicular magnetic recording, the thin-film magnetic head including a main pole with its tip facing a magnetic recording medium and coils for exciting the main pole, wherein the tip of or at least a part of the main pole consists of a soft magnetic multilayer containing laminations, each of which comprises a first ferromagnetic film, a second ferromagnetic film, and an antiparallel coupling layer formed between the first ferromagnetic film and the second ferromagnetic film, wherein the antiparallel coupling layer causes antiferromagnetic interlayer coupling of the first ferromagnetic film and the second ferromagnetic film.
摘要翻译：所公开的发明提供了一种高稳定性的磁头，其中防止“写入后擦除”。这里提供了一种磁头，其包括用于垂直磁记录的薄膜磁头，该薄膜磁头包括一个主极，其顶端面向磁记录介质和用于激励主极的线圈，其中尖端或主极的至少一部分由包含叠层的软磁性多层组成，每层包含第一铁磁膜，第二铁磁膜和形成在第一铁磁膜和第二铁磁膜之间的反并联耦合层，其中反平行耦合层引起第一铁磁膜和第二铁磁膜的反铁磁层间耦合。

8. 发明申请

US20080212239A1 MAGNETIC HEAD AND MAGNETIC DISK SYSTEM HAVING THE SAME 失效
标题翻译：具有相同的磁头和磁盘系统
公开(公告)号：US20080212239A1
公开(公告)日：2008-09-04
申请号：US12014128
申请日：2008-01-15
申请人： Yoshiaki Kawato , Chiseki Haginoya , Kaori Suzuki
发明人： Yoshiaki Kawato , Chiseki Haginoya , Kaori Suzuki
IPC分类号： G11B5/33
CPC分类号： G11B5/315 , G11B5/11 , G11B5/1278 , G11B5/3116 , G11B5/313 , G11B5/3912 , G11B5/3967
摘要： A read sensor is disposed near a main pole, thereby reducing the distance between the read sensor and a write sensor. In this case, however, a magnetic field generated from the main pole affects magnetization of a free layer and a pinned layer of a magnetoresistive film, thereby causing the magnetizing directions to rotate, a magnetic barrier to be generated, and the read property to be degraded. According to the present invention, a main pole and a yoke configure a magnetic circuit together with a sub-pole and a soft magnetic under layer of the magnetic disk and an exciting coil magnetizes the magnetic circuit, thereby a recording magnetic field is applied to a recording layer to record information bits on the layer. And in order to sharpen the magnetic field distribution generated by the main pole, a trailing shield made of a ferromagnetic material is disposed at the trailing side of the main pole adjacently. And a read sensor (magnetoresistive element) for reading bit information is provided between the trailing shield and the main pole.
摘要翻译：读取传感器设置在主极附近，从而减小读取传感器和写入传感器之间的距离。然而，在这种情况下，从主极产生的磁场影响自由层和磁阻膜的固定层的磁化，从而使磁化方向旋转，产生磁阻，读取性能为退化根据本发明，主极和磁轭与磁盘的子极和软磁层一起构成磁路，励磁线圈对磁路进行磁化，由此将记录磁场施加到记录层在层上记录信息位。为了锐化由主极产生的磁场分布，由铁磁材料制成的后挡板相邻地设置在主极的后侧。并且在后屏蔽和主极之间提供用于读取位信息的读取传感器（磁阻元件）。

9. 发明授权

US07405905B2 Perpendicular magnetic recording and reproducing head 失效
标题翻译：垂直磁记录和再现头
公开(公告)号：US07405905B2
公开(公告)日：2008-07-29
申请号：US11517468
申请日：2006-09-08
申请人： Hisashi Kimura , Kazuhiro Nakamoto , Yoshiaki Kawato , Nobuo Yoshida
发明人： Hisashi Kimura , Kazuhiro Nakamoto , Yoshiaki Kawato , Nobuo Yoshida
IPC分类号： G11B5/147
CPC分类号： G11B5/3967 , G11B5/09 , G11B5/1278 , G11B5/187 , G11B5/313 , G11B2005/0029
摘要： There is provided a perpendicular magnetic recording and reproducing system in which the overwrite erase ratio of a perpendicular magnetic head has been improved to prevent the deterioration of an overwrite property. In the perpendicular magnetic head, a third magnetic pole composed of a soft magnetic layer is formed on the leading side of a recording magnetic pole via a non-magnetic layer, thereby reducing magnetic interference from magnetization on a medium with the recording magnetic pole and preventing the deterioration of the overwrite property.
摘要翻译：提供了一种垂直磁记录和再现系统，其中改进了垂直磁头的重写擦除比以防止覆盖性能的劣化。在垂直磁头中，通过非磁性层在记录磁极的前端形成由软磁性层构成的第三磁极，从而减少了具有记录磁极的介质上的磁化的磁干扰，并防止覆盖属性的恶化。

10. 发明申请

US20060164759A1 Magnetic head 失效
公开(公告)号：US20060164759A1
公开(公告)日：2006-07-27
申请号：US11393684
申请日：2006-03-31
申请人： Yasuyuki Okada , Hiroyuki Hoshiya , Yoshiaki Kawato
发明人： Yasuyuki Okada , Hiroyuki Hoshiya , Yoshiaki Kawato
IPC分类号： G11B5/147
CPC分类号： G11B5/1278
摘要： The disclosed invention provides a magnetic head of high stability in which “erase after write” is prevented. Here is provided a magnetic head comprising a thin-film magnetic head for perpendicular magnetic recording, the thin-film magnetic head including a main pole with its tip facing a magnetic recording medium and coils for exciting the main pole, wherein the tip of or at least a part of the main pole consists of a soft magnetic multilayer containing laminations, each of which comprises a first ferromagnetic film, a second ferromagnetic film, and an antiparallel coupling layer formed between the first ferromagnetic film and the second ferromagnetic film, wherein the antiparallel coupling layer causes antiferromagnetic interlayer coupling of the first ferromagnetic film and the second ferromagnetic film.

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