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1. 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。

2. 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。

3. 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。

4. 发明授权

US08085499B2 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：US08085499B2
公开(公告)日：2011-12-27
申请号：US12888621
申请日：2010-09-23
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. 发明授权

US07221538B2 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：US07221538B2
公开(公告)日：2007-05-22
申请号：US10644022
申请日：2003-08-20
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 , G11B5/39
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 exceeding 10 kOe while suppressing remanent magnetic fields occurring immediately after write operations. The perpendicular magnetic head comprises a main pole, a return path for supplying a magnetic flux to that main pole, and a 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 has a thickness within 0.5 to 5 nanometers, and The high saturation flux density layer has a thickness from 10 to 50.
摘要翻译：具有能够记录密度高达100吉比特/平方英寸的窄主磁极的薄膜垂直磁头，并且在写入操作之后立即产生高磁记录场超过10kOe，同时抑制残留的磁场。垂直磁头包括主极，用于向该主极提供磁通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。低饱和磁通密度层的厚度为0.5〜5纳米，高饱和磁通密度层的厚度为10〜50。

6. 发明申请

US20070217066A1 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：US20070217066A1
公开(公告)日：2007-09-20
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： G11B5/127
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 exceeding 10 kOe (oersted), while also modified to suppress remanent magnetic fields occurring immediately after writing operation. In a perpendicular magnetic head comprising a main pole, a return path for supplying a magnetic flux to that 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 has a thickness within 0.5 to 5 nanometers, the high saturation flux density layer has a thickness from 10 to 50 nanometers for suppressing remanent magnetization and preventing 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，并产生超过10kOe（奥斯特）的高磁记录场，同时还被修改以抑制写入后立即发生的残留磁场操作。在包括主极，用于向该主极提供磁通的返回路径和用于激励主极返回路径的导电线圈的垂直磁头中，主极的极宽为200纳米以下，以及由高饱和磁通密度层和低饱和磁通密度层组成的磁性层，低饱和磁通密度层的厚度在0.5〜5纳米之间，高饱和磁通密度层的厚度为10〜50纳米，通过利用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

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.

9. 发明授权

US07057853B2 Magnetic head 失效
标题翻译：磁头
公开(公告)号：US07057853B2
公开(公告)日：2006-06-06
申请号：US10610792
申请日：2003-07-02
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。

10. 发明授权

US07400137B1 Magnetic encoder having a stable output property with unsaturated magnetic sensor 有权
标题翻译：具有不饱和磁传感器稳定输出特性的磁编码器
公开(公告)号：US07400137B1
公开(公告)日：2008-07-15
申请号：US11834062
申请日：2007-08-06
申请人： Kenichi Meguro , Hiroyuki Hoshiya , Kazuhiro Nakamoto , Yasuyuki Okada , Yasunori Abe
发明人： Kenichi Meguro , Hiroyuki Hoshiya , Kazuhiro Nakamoto , Yasuyuki Okada , Yasunori Abe
IPC分类号： G01R33/09 , H01L43/08 , G01B7/14 , G01B7/30
CPC分类号： G01R33/093 , B82Y25/00
摘要： The present invention provides a magnetic sensor suitable for high resolution and having high reliability by achieving stable output even at the occurrence of variations in a gap between a magnetic medium and the magnetic sensor, and a magnetic encoder using the magnetic sensor. The present invention uses a magnetoresistive element having magnetoresistive properties that satisfy the inequation, H10−50
摘要翻译：本发明提供一种适用于高分辨率的磁传感器，即使在磁介质和磁传感器之间的间隙发生变化的情况下也能实现稳定的输出，并具有高的可靠性，以及使用该磁传感器的磁编码器。本发明使用具有满足H10-50

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