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1. 发明授权

US08223464B2 Differential head having a balanced output and method of manufacturing thereof 有权
标题翻译：具有平衡输出的差压头及其制造方法
公开(公告)号：US08223464B2
公开(公告)日：2012-07-17
申请号：US12615221
申请日：2009-11-09
申请人： Kan Yasui , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Katada , Nobuo Yoshida , Hiroyuki Hoshiya
发明人： Kan Yasui , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Katada , Nobuo Yoshida , Hiroyuki Hoshiya
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/3163 , G11B5/398
摘要： In one embodiment, a differential-type magnetic read head includes a differential-type magneto-resistive-effect film formed on a substrate, and a pair of electrodes for applying current in a direction perpendicular to a film plane of the film. The film includes a first and second stacked film, each having a pinned layer, an intermediate layer, and a free layer, with the second stacked film being formed on the first stacked film. A side face in a track width direction of the film is shaped to have an inflection point at an intermediate position in a thickness direction of the film, and the side face is shaped to be approximately vertical to the substrate in an upward direction of the substrate from the inflection point. Also, the side face is shaped to be gradually increased in track width as approaching the substrate in a downward direction of the substrate from the inflection point.
摘要翻译：在一个实施例中，差分型磁读头包括形成在基板上的差分型磁阻效应膜和用于在垂直于膜的膜平面的方向上施加电流的一对电极。膜包括第一和第二堆叠膜，每个具有钉扎层，中间层和自由层，第二堆叠膜形成在第一堆叠膜上。膜的轨道宽度方向的侧面成形为在膜的厚度方向上的中间位置具有拐点，并且侧面成形为在基板的上方大致垂直于基板从拐点。此外，侧面被成形为在从拐点向基板向下方向接近基板的轨迹宽度上逐渐增加。

2. 发明申请

US20100118448A1 DIFFERENTIAL HEAD HAVING A BALANCED OUTPUT AND METHOD OF MANUFACTURING THEREOF 有权
标题翻译：具有平衡输出的差分头及其制造方法
公开(公告)号：US20100118448A1
公开(公告)日：2010-05-13
申请号：US12615221
申请日：2009-11-09
申请人： Kan Yasui , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Katada , Nobuo Yoshida , Hiroyuki Hoshiya
发明人： Kan Yasui , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Katada , Nobuo Yoshida , Hiroyuki Hoshiya
IPC分类号： G11B5/127
CPC分类号： G11B5/3163 , G11B5/398
摘要： In one embodiment, a differential-type magnetic read head includes a differential-type magneto-resistive-effect film formed on a substrate, and a pair of electrodes for applying current in a direction perpendicular to a film plane of the film. The film includes a first and second stacked film, each having a pinned layer, an intermediate layer, and a free layer, with the second stacked film being formed on the first stacked film. A side face in a track width direction of the film is shaped to have an inflection point at an intermediate position in a thickness direction of the film, and the side face is shaped to be approximately vertical to the substrate in an upward direction of the substrate from the inflection point. Also, the side face is shaped to be gradually increased in track width as approaching the substrate in a downward direction of the substrate from the inflection point.
摘要翻译：在一个实施例中，差分型磁读头包括形成在基板上的差分型磁阻效应膜和用于在垂直于膜的膜平面的方向上施加电流的一对电极。膜包括第一和第二堆叠膜，每个具有钉扎层，中间层和自由层，第二堆叠膜形成在第一堆叠膜上。膜的轨道宽度方向的侧面成形为在膜的厚度方向上的中间位置具有拐点，并且侧面成形为在基板的上方大致垂直于基板从拐点。此外，侧面被成形为在从拐点向基板向下方向接近基板的轨迹宽度上逐渐增加。

3. 发明授权

US09245548B2 Magnetic head using a synthetic ferri free structure 有权
标题翻译：磁头使用合成无铁结构
公开(公告)号：US09245548B2
公开(公告)日：2016-01-26
申请号：US12011334
申请日：2008-01-25
申请人： Masato Shiimoto , Hiroyuki Katada , Kazuhiro Nakamoto , Hiroyuki Hoshiya
发明人： Masato Shiimoto , Hiroyuki Katada , Kazuhiro Nakamoto , Hiroyuki Hoshiya
IPC分类号： G11B5/39 , B82Y10/00 , B82Y25/00
CPC分类号： G11B5/3906 , B82Y10/00 , B82Y25/00 , G11B2005/3996 , Y10T428/1121
摘要： Embodiments of the present invention help to reduce mag-noise in a magnetoresistive head without deterioration in reproduced output and improve the signal/noise ratio (SNR) of the magnetoresistive head. According to one embodiment, the magnetoresistive head uses a synthetic ferri free layer and it is arranged such that the magnetic field which is applied to an end of a free layer with smaller film thickness and saturation magnetization in the track width direction by a coupling field is larger than the magnetic field which is applied to it by a bias layer.
摘要翻译：本发明的实施例有助于减少磁阻磁头中的磁噪声，而不会使再现输出变差，并提高磁阻磁头的信噪比（SNR）。根据一个实施例，磁阻头使用合成的无自由层，并且其布置成使得通过耦合场施加到具有较小膜厚度和磁道宽度方向上的饱和磁化强度的自由层的端部的磁场是大于通过偏置层施加到其的磁场。

4. 发明授权

US08223463B2 Magnetic read head 有权
标题翻译：磁读头
公开(公告)号：US08223463B2
公开(公告)日：2012-07-17
申请号：US12579854
申请日：2009-10-15
申请人： Hiroyuki Katada , Masato Shiimoto , Hiroyuki Hoshiya
发明人： Hiroyuki Katada , Masato Shiimoto , Hiroyuki Hoshiya
IPC分类号： G11B5/39
CPC分类号： H01L43/08 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01F10/3254 , H01F10/3272
摘要： A magnetoresistive head which has a high head SNR by reducing generated mag-noise without deteriorating an output comprises, according to one embodiment, a magnetoresistive sensor having a laminated structure which includes an antiferromagnetic layer, a magnetization pinned layer, a non-magnetic intermediate layer, a magnetization free layer, and a magnetization stable layer arranged adjacent to the magnetization free layer. The magnetization stable layer comprises non-magnetic coupling layer, a first ferromagnetic stable layer, an antiparallel coupling layer, and a second ferromagnetic stable layer. A magnetization quantity of a first ferromagnetic stable layer and a second ferromagnetic stable layer are substantially equal, and the magnetization of the first ferromagnetic stable layer and the second ferromagnetic stable layer are magnetically coupled in the antiparallel direction from each other. The magnetizations of the first ferromagnetic stable layer and the free layer are coupled in an antiferromagnetic or a ferromagnetic alignment.
摘要翻译：根据一个实施例，通过减少产生的磁场噪声而具有高磁头噪声的磁阻头包括：根据一个实施例，具有层叠结构的磁阻传感器包括反铁磁层，磁化钉扎层，非磁性中间层，无磁化层和邻近无磁化层布置的磁化稳定层。磁化稳定层包括非磁耦合层，第一铁磁稳定层，反平行耦合层和第二铁磁稳定层。第一铁磁稳定层和第二铁磁稳定层的磁化量基本相等，第一铁磁稳定层和第二铁磁稳定层的磁化在反平行方向彼此磁耦合。第一铁磁稳定层和自由层的磁化以反铁磁或铁磁取向耦合。

5. 发明申请

US20100091416A1 MAGNETIC READ HEAD 有权
标题翻译：磁头阅读头
公开(公告)号：US20100091416A1
公开(公告)日：2010-04-15
申请号：US12579854
申请日：2009-10-15
申请人： Hiroyuki Katada , Masato Shiimoto , Hiroyuki Hoshiya
发明人： Hiroyuki Katada , Masato Shiimoto , Hiroyuki Hoshiya
IPC分类号： G11B5/33
CPC分类号： H01L43/08 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01F10/3254 , H01F10/3272
摘要： A magnetoresistive head which has a high head SNR by reducing generated mag-noise without deteriorating an output comprises, according to one embodiment, a magnetoresistive sensor having a laminated structure which includes an antiferromagnetic layer, a magnetization pinned layer, a non-magnetic intermediate layer, a magnetization free layer, and a magnetization stable layer arranged adjacent to the magnetization free layer. The magnetization stable layer comprises non-magnetic coupling layer, a first ferromagnetic stable layer, an antiparallel coupling layer, and a second ferromagnetic stable layer. A magnetization quantity of a first ferromagnetic stable layer and a second ferromagnetic stable layer are substantially equal, and the magnetization of the first ferromagnetic stable layer and the second ferromagnetic stable layer are magnetically coupled in the antiparallel direction from each other. The magnetizations of the first ferromagnetic stable layer and the free layer are coupled in an antiferromagnetic or a ferromagnetic alignment.
摘要翻译：根据一个实施例，通过减少产生的磁场噪声而具有高磁头噪声的磁阻头包括：根据一个实施例，具有层叠结构的磁阻传感器包括反铁磁层，磁化钉扎层，非磁性中间层，无磁化层和邻近无磁化层布置的磁化稳定层。磁化稳定层包括非磁耦合层，第一铁磁稳定层，反平行耦合层和第二铁磁稳定层。第一铁磁稳定层和第二铁磁稳定层的磁化量基本相等，第一铁磁稳定层和第二铁磁稳定层的磁化在反平行方向彼此磁耦合。第一铁磁稳定层和自由层的磁化以反铁磁或铁磁取向耦合。

6. 发明申请

US20080182133A1 Magnetic head 有权
标题翻译：磁头
公开(公告)号：US20080182133A1
公开(公告)日：2008-07-31
申请号：US12011334
申请日：2008-01-25
申请人： Masato Shiimoto , Hiroyuki Katada , Kazuhiro Nakamoto , Hiroyuki Hoshiya
发明人： Masato Shiimoto , Hiroyuki Katada , Kazuhiro Nakamoto , Hiroyuki Hoshiya
IPC分类号： G11B5/39
CPC分类号： G11B5/3906 , B82Y10/00 , B82Y25/00 , G11B2005/3996 , Y10T428/1121
摘要： Embodiments of the present invention help to reduce mag-noise in a magnetoresistive head without deterioration in reproduced output and improve the signal/noise ratio (SNR) of the magnetoresistive head. According to one embodiment, the magnetoresistive head uses a synthetic ferri free layer and it is arranged such that the magnetic field which is applied to an end of a free layer with smaller film thickness and saturation magnetization in the track width direction by a coupling field is larger than the magnetic field which is applied to it by a bias layer.
摘要翻译：本发明的实施例有助于减少磁阻磁头中的磁噪声，而不会使再现输出变差，并提高磁阻磁头的信噪比（SNR）。根据一个实施例，磁阻头使用合成的无自由层，并且其布置成使得通过耦合场施加到具有较小膜厚度和磁道宽度方向上的饱和磁化强度的自由层的端部的磁场是大于通过偏置层施加到其的磁场。

7. 发明授权

US08570689B2 Differential magnetoresistive effect head and magnetic recording/reading device 有权
标题翻译：差分磁阻效应头和磁记录/读取装置
公开(公告)号：US08570689B2
公开(公告)日：2013-10-29
申请号：US12628577
申请日：2009-12-01
申请人： Yo Sato , Katsumi Hoshino , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Hoshiya
发明人： Yo Sato , Katsumi Hoshino , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Hoshiya
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/3948 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01F10/3254 , H01F10/3268 , H01L43/08
摘要： According to one embodiment, a differential magnetoresistive effect element comprises a first magnetoresistive effect element having a first pinning layer, a first intermediate layer, and a first free layer. The differential magnetoresistive effect element also comprises a second magnetoresistive effect element stacked via a spacer layer above the first magnetoresistive effect element, the second magnetoresistive effect element having a second pinning layer, a second intermediate layer, and a second free layer. The first magnetoresistive effect element and the second magnetoresistive effect element show in-opposite-phase resistance change in response to a magnetic field in the same direction, and tp2>tp1 is satisfied when a thickness of the first pinning layer is tp1, and a thickness of the second pinning layer is tp2. In another embodiment, the first and second magnetoresistive effect elements may be CPP-GMR elements. Other elements, heads, and magnetic recording/reading devices are described according to other embodiments.
摘要翻译：根据一个实施例，差分磁阻效应元件包括具有第一钉扎层，第一中间层和第一自由层的第一磁阻效应元件。差分磁阻效应元件还包括通过第一磁阻效应元件上方的间隔层层叠的第二磁阻效应元件，第二磁阻效应元件具有第二钉扎层，第二中间层和第二自由层。第一磁阻效应元件和第二磁阻效应元件响应于相同方向上的磁场显示出相位相位的电阻变化，并且当第一钉扎层的厚度为tp1时，tp2> tp1满足，并且厚度的第二钉扎层是tp2。在另一个实施例中，第一和第二磁阻效应元件可以是CPP-GMR元件。根据其他实施例描述其它元件，磁头和磁记录/读取装置。

8. 发明申请

US20100142101A1 DIFFERENTIAL MAGNETORESISTIVE EFFECT HEAD AND MAGNETIC RECORDING/READING DEVICE 有权
标题翻译：差分磁阻效应头和磁记录/读取装置
公开(公告)号：US20100142101A1
公开(公告)日：2010-06-10
申请号：US12628577
申请日：2009-12-01
申请人： Yo Sato , Katsumi Hoshino , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Hoshiya
发明人： Yo Sato , Katsumi Hoshino , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Hoshiya
IPC分类号： G11B5/33
CPC分类号： G11B5/3948 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01F10/3254 , H01F10/3268 , H01L43/08
摘要： According to one embodiment, a differential magnetoresistive effect element comprises a first magnetoresistive effect element having a first pinning layer, a first intermediate layer, and a first free layer. The differential magnetoresistive effect element also comprises a second magnetoresistive effect element stacked via a spacer layer above the first magnetoresistive effect element, the second magnetoresistive effect element having a second pinning layer, a second intermediate layer, and a second free layer. The first magnetoresistive effect element and the second magnetoresistive effect element show in-opposite-phase resistance change in response to a magnetic field in the same direction, and tp2>tp1 is satisfied when a thickness of the first pinning layer is tp1, and a thickness of the second pinning layer is tp2. In another embodiment, the first and second magnetoresistive effect elements may be CPP-GMR elements. Other elements, heads, and magnetic recording/reading devices are described according to other embodiments.
摘要翻译：根据一个实施例，差分磁阻效应元件包括具有第一钉扎层，第一中间层和第一自由层的第一磁阻效应元件。差分磁阻效应元件还包括通过第一磁阻效应元件上方的间隔层层叠的第二磁阻效应元件，第二磁阻效应元件具有第二钉扎层，第二中间层和第二自由层。第一磁阻效应元件和第二磁阻效应元件响应于相同方向上的磁场显示出相位相位的电阻变化，并且当第一钉扎层的厚度为tp1时，tp2> tp1满足，并且厚度的第二钉扎层是tp2。在另一个实施例中，第一和第二磁阻效应元件可以是CPP-GMR元件。根据其他实施例描述其它元件，磁头和磁记录/读取装置。

9. 发明授权

US07733614B2 Magneto-resistive head having a stable response property without longitudinal biasing and method for manufacturing the same 失效
标题翻译：具有稳定的响应特性而不具有纵向偏置的磁阻头及其制造方法
公开(公告)号：US07733614B2
公开(公告)日：2010-06-08
申请号：US11698251
申请日：2007-01-24
申请人： Kenichi Meguro , Hiroyuki Katada , Katsumi Hoshino , Hiroyuki Hoshiya
发明人： Kenichi Meguro , Hiroyuki Katada , Katsumi Hoshino , Hiroyuki Hoshiya
IPC分类号： G11B5/127
CPC分类号： G11B5/399 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01L43/08 , H01L43/12
摘要： Embodiments in accordance with the present invention provide a method of manufacturing a magneto-resistive head which can realize high sensitivity and good linear response characteristics with low noise even if a track width becomes narrower. A uniaxial anisotropy unaffected by annealing which is due to the orientation of the crystal grain growth direction, is induced in a magnetic layer. The free magnetic layer has the synthetic antiferromagnetic construction: first magnetic layer/interlayer antiferromagnetic coupling layer/second magnetic layer, the magnitude of the antiferromagnetic coupling is adjusted, and linear response characteristics are obtained even if a longitudinal biasing field applying mechanism is not provided.
摘要翻译：根据本发明的实施例提供一种制造磁阻头的方法，即使轨道宽度变窄，其也可以实现具有低噪声的高灵敏度和良好的线性响应特性。在磁性层中诱发不受退火影响的单轴各向异性，这是由于晶粒生长方向的取向引起的。自由磁性层具有合成的反铁磁结构：第一磁性层/层间反铁磁耦合层/第二磁性层，调整反铁磁耦合的大小，并且即使没有提供纵向偏置场施加机构也可获得线性响应特性。

10. 发明申请

US20090034135A1 Differential magnetoresistive magnetic head 有权
标题翻译：差分磁阻磁头
公开(公告)号：US20090034135A1
公开(公告)日：2009-02-05
申请号：US12218860
申请日：2008-07-17
申请人： Hiroyuki Hoshiya , Kenichi Meguro , Katsumi Hoshino , Yo Sato , Hiroyuki Katada , Kazuhiro Nakamoto
发明人： Hiroyuki Hoshiya , Kenichi Meguro , Katsumi Hoshino , Yo Sato , Hiroyuki Katada , Kazuhiro Nakamoto
IPC分类号： G11B5/33
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3929 , G11B2005/3996
摘要： Embodiments of the present invention help to provide a single element type differential magnetoresistive magnetic head capable of achieving high resolution and high manufacturing stability. According to one embodiment, a magnetoresistive layered film is formed by stacking an underlayer film, an antiferromagnetic film, a ferromagnetic pinned layer, a non-magnetic intermediate layer, a soft magnetic free layer, a long distance antiparallel coupling layered film, and a differential soft magnetic free layer. The long distance antiparallel coupling layered film exchange-couples the soft magnetic free layer and the differential soft magnetic free layer in an antiparallel state with a distance of about 3 nanometers through 20 nanometers. By manufacturing the single element type differential magnetoresistive magnetic head using the magnetoresistive layered film, it becomes possible to achieve the high resolution and the high manufacturing stability without spoiling the GMR effect.
摘要翻译：本发明的实施例有助于提供能够实现高分辨率和高制造稳定性的单元型差分磁阻磁头。根据一个实施例，通过堆叠下层膜，反铁磁性膜，铁磁性钉扎层，非磁性中间层，软磁性自由层，长距离反向平行耦合层叠膜和差动层叠膜形成磁阻层叠膜软磁自由层。长距离反平行耦合分层膜将软磁自由层和差分软磁自由层以约3纳米至20纳米的距离反平行状态进行交换耦合。通过使用磁阻层叠膜制造单元型差分磁阻磁头，可以实现高分辨率和高制造稳定性而不破坏GMR效应。

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