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1. 发明授权

US06926974B2 Perpendicular magnetic recording medium and magnetic storage apparatus 失效
公开(公告)号：US06926974B2
公开(公告)日：2005-08-09
申请号：US09861568
申请日：2001-05-22
申请人： Yoshiaki Kawato , Masaaki Futamoto , Kazuhiro Nakamoto
发明人： Yoshiaki Kawato , Masaaki Futamoto , Kazuhiro Nakamoto
IPC分类号： G11B5/667 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/738 , G11B5/70
CPC分类号： G11B5/66
摘要： An improved perpendicular magnetic recording medium and an improved magnetic storage apparatus are provided, which are suitable for high speed and high density magnetic recording. A magnetic under layer of a two-layered perpendicular magnetic recording medium includes three layers: a ferromagnetic layer; a non-magnetic layer; and a ferromagnetic layer, wherein the ferromagnetic layers are antiferromagnetically coupled with each other, thereby preventing a magnetic flux from a magnetic wall in a magnetic under layer from entering a read back head.

2. 发明申请

US20050214587A1 Perpendicular magnetic recording medium and magnetic storage apparatus 失效
标题翻译：垂直磁记录介质和磁存储设备
公开(公告)号：US20050214587A1
公开(公告)日：2005-09-29
申请号：US11103594
申请日：2005-04-12
申请人： Yoshiaki Kawato , Masaaki Futamoto , Kazuhiro Nakamoto
发明人： Yoshiaki Kawato , Masaaki Futamoto , Kazuhiro Nakamoto
IPC分类号： G11B5/667 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/738
CPC分类号： G11B5/66
摘要： An improved perpendicular magnetic recording medium and an improved magnetic storage apparatus are provided, which are suitable for high speed and high density magnetic recording. A magnetic under layer of a two-layered perpendicular magnetic recording medium includes three layers: a ferromagnetic layer; a non-magnetic layer; and a ferromagnetic layer, wherein the ferromagnetic layers are antiferromagnetically coupled with each other, thereby preventing a magnetic flux from a magnetic wall in a magnetic under layer from entering a read back head.
摘要翻译：提供了一种改进的垂直磁记录介质和改进的磁存储装置，其适用于高速和高密度磁记录。双层垂直磁记录介质的磁性底层包括三层：铁磁层; 非磁性层; 和铁磁层，其中所述铁磁层彼此反铁磁耦合，从而防止来自磁性底层中的磁壁的磁通量进入回读头。

3. 发明授权

US07348078B2 Perpendicular magnetic recording medium and magnetic storage apparatus 失效
标题翻译：垂直磁记录介质和磁存储设备
公开(公告)号：US07348078B2
公开(公告)日：2008-03-25
申请号：US11103594
申请日：2005-04-12
申请人： Yoshiaki Kawato , Masaaki Futamoto , Kazuhiro Nakamoto
发明人： Yoshiaki Kawato , Masaaki Futamoto , Kazuhiro Nakamoto
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66
摘要： An improved perpendicular magnetic recording medium and an improved magnetic storage apparatus are provided, which are suitable for high speed and high density magnetic recording. A magnetic under layer of a two-layered perpendicular magnetic recording medium includes three layers: a ferromagnetic layer; a non-magnetic layer; and a ferromagnetic layer, wherein the ferromagnetic layers are antiferromagnetically coupled with each other, thereby preventing a magnetic flux from a magnetic wall in a magnetic under layer from entering a read back head.
摘要翻译：提供了一种改进的垂直磁记录介质和改进的磁存储装置，其适用于高速和高密度磁记录。双层垂直磁记录介质的磁性底层包括三层：铁磁层; 非磁性层; 和铁磁层，其中所述铁磁层彼此反铁磁耦合，从而防止来自磁性底层中的磁壁的磁通量进入回读头。

4. 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。

5. 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。

6. 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。

7. 发明授权

US07145750B2 Perpendicular magnetic recording head and perpendicular magnetic recording and reproducing system 有权
公开(公告)号：US07145750B2
公开(公告)日：2006-12-05
申请号：US10335884
申请日：2003-01-03
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： G11B5/127
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.

8. 发明授权

US06731478B2 Magnetoresistive effect head 失效
标题翻译：磁阻效应头
公开(公告)号：US06731478B2
公开(公告)日：2004-05-04
申请号：US10400622
申请日：2003-03-28
申请人： Kazuhiro Nakamoto , Yoshiaki Kawato
发明人： Kazuhiro Nakamoto , Yoshiaki Kawato
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3932 , G11B5/399 , G11B2005/3996
摘要： A slider includes an air-introducing plane, a groove, an air flow-out end, and a thin-film magnetic head formed on the air flow-out end. The thin-film magnetic head includes a magnetoresistive effect type film which includes a first ferromagnetic film having a direction of magnetization which is changeable, an antiferromagnetic film, a second ferromagnetic film having a direction of magnetization which is fixed, and a non-magnetic conductive film disposed between the first ferromagnetic film and the second ferromagnetic film. The thin-film magnetic head further includes a pair of magnetic domain control films respectively arranged at ends of the magnetoresistive effect type film, and a pair of electrodes directly overlapping both end domains of the magnetoresistive effect type film. A spacing between the electrodes is narrower than a spacing between the magnetic domain control films.
摘要翻译：滑块包括形成在空气流出端的空气引入平面，凹槽，空气流出端和薄膜磁头。薄膜磁头包括磁阻效应型膜，其包括具有可变化的磁化方向的第一铁磁膜，反铁磁膜，具有固定的磁化方向的第二铁磁膜和非磁性导电膜设置在第一铁磁膜和第二铁磁膜之间。薄膜磁头还包括分别布置在磁阻效应型膜的端部的一对磁畴控制膜和直接与磁阻效应型膜的两端畴重叠的一对电极。电极之间的间隔比磁畴控制膜之间的间隔窄。

9. 发明授权

US06545847B2 Magnetoresistive effect head 有权
公开(公告)号：US06545847B2
公开(公告)日：2003-04-08
申请号：US10021094
申请日：2001-12-19
申请人： Kazuhiro Nakamoto , Yoshiaki Kawato
发明人： Kazuhiro Nakamoto , Yoshiaki Kawato
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3932 , G11B5/399 , G11B2005/3996
摘要： A magnetic head includes a magnetoresistive effect type film, which includes a first ferromagnetic film having a direction of magnetization which is changeable, an antiferromagnetic film, a second ferromagnetic film having a direction of magnetization which is fixed, and a non-magnetic conductive film disposed between the first ferromagnetic film and the second ferromagnetic film. The magnetic head further includes a pair of magnetic domain control films respectively arranged at ends of the magnetoresistive effect type film, and a pair of electrodes respectively arranged at the ends of the magnetoresistive effect type film. A spacing between the electrodes is narrower than a spacing between the magnetic domain control films.

10. 发明授权

US07532433B2 Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 失效
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：US07532433B2
公开(公告)日：2009-05-12
申请号：US11802297
申请日：2007-05-22
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余磁化并防止写入后的擦除。

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