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31. 发明授权

US07583478B2 Thin-film magnetic head, head gimbal assembly, head arm assembly and magnetic disk drive 有权
标题翻译：薄膜磁头，头万向架组件，头臂组件和磁盘驱动器
公开(公告)号：US07583478B2
公开(公告)日：2009-09-01
申请号：US11482090
申请日：2006-07-07
申请人： Takahiko Machita , Kei Hirata , Koji Shimazawa
发明人： Takahiko Machita , Kei Hirata , Koji Shimazawa
IPC分类号： G11B5/33
CPC分类号： G11B5/3932 , B82Y10/00 , B82Y25/00 , G11B5/1278 , G11B5/3912 , G11B2005/3996
摘要： A thin-film magnetic head comprises: a magnetoresistive element: first and second read shield layers disposed to sandwich the magnetoresistive element; and bias field applying layers for applying a bias magnetic field to the magnetoresistive element. Each of the first and second read shield layers has: a first end face located in a medium facing surface; a second end face opposite to the first end face; a first width changing portion that continuously decreases in width as the distance from the first end face decreases; and a second width changing portion that continuously decreases in width as the distance from the second end face decreases.
摘要翻译：薄膜磁头包括：磁阻元件：设置成夹着磁阻元件的第一和第二读屏蔽层; 以及用于向磁阻元件施加偏置磁场的偏置场施加层。第一和第二读取屏蔽层中的每一个具有：位于介质面对表面中的第一端面; 与第一端面相对的第二端面; 第一宽度改变部分，随着距离第一端面的距离减小，其宽度连续减小; 以及随着与第二端面的距离的减小，宽度连续减小的第二宽度改变部分。

32. 发明申请

US20070109691A1 Thin-film magnetic head, head gimbal assembly, head arm assembly and magnetic disk drive 有权
标题翻译：薄膜磁头，头万向架组件，头臂组件和磁盘驱动器
公开(公告)号：US20070109691A1
公开(公告)日：2007-05-17
申请号：US11482090
申请日：2006-07-07
申请人： Takahiko Machita , Kei Hirata , Koji Shimazawa
发明人： Takahiko Machita , Kei Hirata , Koji Shimazawa
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/3932 , B82Y10/00 , B82Y25/00 , G11B5/1278 , G11B5/3912 , G11B2005/3996
摘要： A thin-film magnetic head comprises: a magnetoresistive element: first and second read shield layers disposed to sandwich the magnetoresistive element; and bias field applying layers for applying a bias magnetic field to the magnetoresistive element. Each of the first and second read shield layers has: a first end face located in a medium facing surface; a second end face opposite to the first end face; a first width changing portion that continuously decreases in width as the distance from the first end face decreases; and a second width changing portion that continuously decreases in width as the distance from the second end face decreases.
摘要翻译：薄膜磁头包括：磁阻元件：设置成夹着磁阻元件的第一和第二读屏蔽层; 以及用于向磁阻元件施加偏置磁场的偏置场施加层。第一和第二读取屏蔽层中的每一个具有：位于介质面对表面中的第一端面; 与第一端面相对的第二端面; 第一宽度改变部分，随着距离第一端面的距离减小，其宽度连续减小; 以及随着与第二端面的距离的减小，宽度连续减小的第二宽度改变部分。

33. 发明授权

US07843668B2 Magnetoresistive element including two ferromagnetic layers 有权
标题翻译：磁阻元件包括两个铁磁层
公开(公告)号：US07843668B2
公开(公告)日：2010-11-30
申请号：US12005274
申请日：2007-12-27
申请人： Takahiko Machita , Kei Hirata , Koji Shimazawa , Daisuke Miyauchi
发明人： Takahiko Machita , Kei Hirata , Koji Shimazawa , Daisuke Miyauchi
IPC分类号： G11B5/33
CPC分类号： G01R33/093 , B82Y25/00 , G01R33/098 , G11B5/3912 , G11B5/3932 , H01L43/12
摘要： A magnetoresistive element includes a first and a second shield, and an MR stack disposed between the shields. The MR stack includes a first and a second ferromagnetic layer, and a nonmagnetic spacer layer disposed between the ferromagnetic layers. The first and second ferromagnetic layers have magnetizations that are in directions antiparallel to each other when no external magnetic field is applied to the layers, and that change directions in response to an external magnetic field. An insulating layer is formed to touch a rear end face of the MR stack and the first shield, and a bias magnetic field applying layer is formed above the insulating layer with a buffer layer disposed in between. The bias magnetic field applying layer includes a hard magnetic layer and a high saturation magnetization layer. The high saturation magnetization layer is located between the rear end face and the hard magnetic layer, but not located between the first shield and the hard magnetic layer.
摘要翻译：磁阻元件包括第一和第二屏蔽以及设置在屏蔽之间的MR堆叠。 MR堆叠包括第一和第二铁磁层，以及设置在铁磁层之间的非磁性间隔层。当没有外部磁场施加到层上时，第一和第二铁磁层具有在彼此反平行的方向上的磁化，并且响应于外部磁场改变方向。形成绝缘层以接触MR堆叠和第一屏蔽的后端面，并且在绝缘层上形成有偏置磁场施加层，其间设置有缓冲层。偏置磁场施加层包括硬磁性层和高饱和磁化层。高饱和磁化层位于后端面和硬磁性层之间，但不位于第一屏蔽和硬磁性层之间。

34. 发明申请

US20060262457A1 Magnetic field sensor provided with an upper shield layer having portions with different magnetostriction 失效
公开(公告)号：US20060262457A1
公开(公告)日：2006-11-23
申请号：US11411107
申请日：2006-04-26
申请人： Kei Hirata , Takahiko Machita , Koji Shimazawa , Kiyoshi Noguchi
发明人： Kei Hirata , Takahiko Machita , Koji Shimazawa , Kiyoshi Noguchi
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/3912 , B82Y10/00 , G11B5/3909 , G11B5/3929 , G11B2005/3996
摘要： A magnetic field sensor comprises: a magnetic field detecting element that detects magnitude of an external magnetic field based on electric resistance of the magnetic field detecting element to sense current, the electric resistance being varied in accordance with the external magnetic field; an upper shield layer that is formed to cover the magnetic field detecting element; and a protective layer that is formed above the upper shield layer with respect to a direction of stacking. The upper shield layer includes a first portion at least part of which covers a top surface of the magnetic field detecting element, and a second portion that covers the first portion, and, the first portion has a larger absolute value of magnetostriction than the second portion.

35. 发明授权

US07558027B2 Magnetic field sensor provided with an upper shield layer having portions with different magnetostriction 失效
标题翻译：磁场传感器设置有具有不同磁致伸缩部分的上屏蔽层
公开(公告)号：US07558027B2
公开(公告)日：2009-07-07
申请号：US11411107
申请日：2006-04-26
申请人： Kei Hirata , Takahiko Machita , Koji Shimazawa , Kiyoshi Noguchi
发明人： Kei Hirata , Takahiko Machita , Koji Shimazawa , Kiyoshi Noguchi
IPC分类号： G11B5/127
CPC分类号： G11B5/3912 , B82Y10/00 , G11B5/3909 , G11B5/3929 , G11B2005/3996
摘要： A magnetic field sensor comprises: a magnetic field detecting element that detects magnitude of an external magnetic field based on electric resistance of the magnetic field detecting element to sense current, the electric resistance being varied in accordance with the external magnetic field; an upper shield layer that is formed to cover the magnetic field detecting element; and a protective layer that is formed above the upper shield layer with respect to a direction of stacking. The upper shield layer includes a first portion at least part of which covers a top surface of the magnetic field detecting element, and a second portion that covers the first portion, and, the first portion has a larger absolute value of magnetostriction than the second portion.
摘要翻译：磁场传感器包括：磁场检测元件，其基于磁场检测元件的电阻来检测外部磁场的大小以感测电流，电阻根据外部磁场而变化; 形成为覆盖所述磁场检测元件的上屏蔽层; 以及相对于堆叠方向形成在上屏蔽层上方的保护层。上屏蔽层包括其至少一部分覆盖磁场检测元件的顶表面的第一部分和覆盖第一部分的第二部分，并且第一部分具有比第二部分更大的磁致伸缩绝对值。

36. 发明授权

US08000063B2 Magneto-resistive element, thin film magnetic head, magnetic head device, and magnetic recording/reproducing apparatus 有权
标题翻译：磁阻元件，薄膜磁头，磁头装置和磁记录/重放装置
公开(公告)号：US08000063B2
公开(公告)日：2011-08-16
申请号：US11623493
申请日：2007-01-16
申请人： Atsushi Yamaguchi , Kei Hirata , Satoshi Miura , Yoshihiro Tsuchiya , Kiyoshi Noguchi
发明人： Atsushi Yamaguchi , Kei Hirata , Satoshi Miura , Yoshihiro Tsuchiya , Kiyoshi Noguchi
IPC分类号： G11B5/39
CPC分类号： G11B5/3967 , G11B5/11 , G11B5/3912
摘要： A magneto-resistive element includes a lower magnetic shield film and a magneto-resistive film disposed above the lower magnetic shield film. The lower magnetic shield film includes a lower shield layer and an upper shield layer. The upper shield layer is amorphous or microcrystalline, made of a NiFe or CoFe composition containing B or P, and deposited on the lower shield layer. The lower shield layer is a magnetic conductive layer which is amorphous or microcrystalline with a crystal grain size equal to or less than 20 nm.
摘要翻译：磁阻元件包括下磁屏蔽膜和设置在下磁屏蔽膜上方的磁阻膜。下磁屏蔽膜包括下屏蔽层和上屏蔽层。上屏蔽层是无定形或微晶的，由含有B或P的NiFe或CoFe组合物制成并沉积在下屏蔽层上。下屏蔽层是晶体尺寸等于或小于20nm的非晶或微晶的导电层。

37. 发明申请

US20070242391A1 MAGNETO-RESISTIVE ELEMENT, THIN FILM MAGNETIC HEAD, MAGNETIC HEAD DEVICE, AND MAGNETIC RECORDING/REPRODUCING APPARATUS 有权
标题翻译：磁电元件，薄膜磁头，磁头装置和磁记录/再现装置
公开(公告)号：US20070242391A1
公开(公告)日：2007-10-18
申请号：US11623493
申请日：2007-01-16
申请人： Atsushi YAMAGUCHI , Kei Hirata , Satoshi Miura , Yoshihiro Tsuchiya , Kiyoshi Noguchi
发明人： Atsushi YAMAGUCHI , Kei Hirata , Satoshi Miura , Yoshihiro Tsuchiya , Kiyoshi Noguchi
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/3967 , G11B5/11 , G11B5/3912
摘要： A magneto-resistive element includes a lower magnetic shield film and a magneto-resistive film disposed above the lower magnetic shield film. The lower magnetic shield film includes a lower shield layer and an upper shield layer. The upper shield layer is amorphous or microcrystalline, made of a NiFe or CoFe composition containing B or P, and deposited on the lower shield layer. The lower shield layer is a magnetic conductive layer which is amorphous or microcrystalline with a crystal grain size equal to or less than 20 nm.
摘要翻译：磁阻元件包括下磁屏蔽膜和设置在下磁屏蔽膜上方的磁阻膜。下磁屏蔽膜包括下屏蔽层和上屏蔽层。上屏蔽层是无定形或微晶的，由含有B或P的NiFe或CoFe组合物制成并沉积在下屏蔽层上。下屏蔽层是晶体尺寸等于或小于20nm的非晶或微晶的导电层。

38. 发明授权

US08582239B2 Microwave assisted magnetic recording head and magnetic recording method therewith 有权
标题翻译：微波辅助磁记录头及其磁记录方法
公开(公告)号：US08582239B2
公开(公告)日：2013-11-12
申请号：US13527735
申请日：2012-06-20
申请人： Yoshikazu Soeno , Kei Hirata , Tsutomu Aoyama , Isamu Sato
发明人： Yoshikazu Soeno , Kei Hirata , Tsutomu Aoyama , Isamu Sato
IPC分类号： G11B5/31 , G11B5/02
CPC分类号： G11B5/314 , G11B5/3967 , G11B2005/0024
摘要： A microwave assisted magnetic head includes a main magnetic pole; a trailing shield, a main coil for causing the main magnetic pole to generate a perpendicular recording field, at least one secondary coil for generating an in-plane alternate-current (AC) magnetic field with a frequency in a microwave band from a magnetic recording gap between the main magnetic pole and the trailing shield, nonmagnetic films formed on magnetic recording gap facing surfaces that are defined by the main magnetic pole and the trailing shield, the main magnetic pole and the trailing shield being configured with first soft magnetic films, and second soft magnetic films formed further on the surfaces of the nonmagnetic films. The second soft magnetic films have larger anisotropy fields than the first soft magnetic films have.
摘要翻译：微波辅助磁头包括主磁极; 后屏蔽，用于使主磁极产生垂直记录场的主线圈，至少一个次级线圈，用于产生来自磁记录的微波频带中的频率的平面内交流（AC）磁场主磁极和后屏蔽之间的间隙，由主磁极和后屏蔽限定的磁记录间隙面对表面上形成的非磁性膜，主磁极和后屏蔽构成第一软磁膜，以及第二软磁膜进一步形成在非磁性膜的表面上。第二软磁膜具有比第一软磁膜具有更大的各向异性场。

39. 发明授权

US08559123B2 Magnetic recording device, magnetic recording method and magnetic recording medium for shingle write scheme 失效
标题翻译：磁记录装置，磁记录方法和瓦片写入方案的磁记录介质
公开(公告)号：US08559123B2
公开(公告)日：2013-10-15
申请号：US12801540
申请日：2010-06-14
申请人： Kei Hirata , Norikazu Ota , Noboru Yamanaka
发明人： Kei Hirata , Norikazu Ota , Noboru Yamanaka
IPC分类号： G11B5/09
CPC分类号： G11B5/1278 , B82Y10/00 , G11B5/743
摘要： This magnetic recording device is provided with a magnetic write head having a magnetic pole, and a magnetic recording medium having a plurality of data recording blocks. Each of the data recording blocks is formed with a plurality of write tracks, and separated, in a write track width direction, from neighboring one of the data recording blocks with a writing exudation suppression section in between. With this configuration, a magnetic mutual interference of the adjacent data recording blocks at the time of a data rewriting process is avoided even when a mutual interval of the data recording blocks is narrowed, and a good recording state is maintained in each of the data recording blocks. Therefore, it is possible to achieve an improvement in a recording density, while realizing the good and brief data rewriting process for each of the data recording blocks.
摘要翻译：该磁记录装置设置有具有磁极的磁写头和具有多个数据记录块的磁记录介质。每个数据记录块形成有多个写入磁道，并且在写入磁道宽度方向上与相邻的一个数据记录块之间具有写入渗出抑制部分。利用这种配置，即使当数据记录块的相互间隔变窄时也避免了在数据重写处理时相邻的数据记录块的磁互相干扰，并且在每个数据记录中保持良好的记录状态块。因此，可以实现对每个数据记录块的良好且简短的数据重写处理的记录密度的提高。

40. 发明授权

US08254215B1 Thermally-assisted magnetic recording head 有权
标题翻译：热辅助磁记录头
公开(公告)号：US08254215B1
公开(公告)日：2012-08-28
申请号：US13282943
申请日：2011-10-27
申请人： Kosuke Tanaka , Susumu Aoki , Kei Hirata , Makoto Isogai
发明人： Kosuke Tanaka , Susumu Aoki , Kei Hirata , Makoto Isogai
IPC分类号： G11B11/00
CPC分类号： G11B5/3116 , G11B5/314 , G11B5/3163 , G11B5/6088 , G11B2005/0021
摘要： A thermally-assisted magnetic recording head includes a main pole, a waveguide, and a plasmon generator. The main pole has a front end face including first and second ends that are opposite in a track width direction. An arbitrary cross section of the main pole that passes through an arbitrary point on the front end face and is perpendicular to a medium facing surface and to the track width direction has a length in a direction perpendicular to the medium facing surface. When the arbitrary point on the front end face is located at a center of the front end face in the track width direction, the length of the arbitrary cross section is smaller than that when the arbitrary point is located at the first end and that when the arbitrary point is located at the second end.
摘要翻译：热辅助磁记录头包括主极，波导和等离子体发生器。主极具有包括在轨道宽度方向上相对的第一端和第二端的前端面。主极的任意横截面，其通过前端面上的任意点并且垂直于介质相对表面和轨道宽度方向，具有与面向介质的表面垂直的方向的长度。当前端面上的任意点位于轨道宽度方向上的前端面的中心时，任意横截面的长度小于任意点位于第一端的长度，而当任意点位于第二端。

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