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1. 发明授权

US08264916B1 Microwave assisted magnetic head and magnetic disk device 有权
标题翻译：微波辅助磁头和磁盘装置
公开(公告)号：US08264916B1
公开(公告)日：2012-09-11
申请号：US13045603
申请日：2011-03-11
申请人： Tsutomu Aoyama , Tetsuya Roppongi , Yoshikazu Soeno , Kiyoshi Noguchi , Isamu Sato
发明人： Tsutomu Aoyama , Tetsuya Roppongi , Yoshikazu Soeno , Kiyoshi Noguchi , Isamu Sato
IPC分类号： G11B11/00 , G11B27/36
CPC分类号： G11B5/314 , G11B5/1278 , G11B2005/0024
摘要： A microwave assisted magnetic head of the present invention includes: at least two or more auxiliary coils that are arranged in a periphery of a writing main pole; and microwave current supply means that applies microwave currents to the at least two or more auxiliary coils. The at least two or more auxiliary coils respectively include linear body parts linearly arranged on an ABS side, two of the linear body parts of the at least two or more auxiliary coils are arranged in a substantially orthogonal positional relationship, and the microwave current supply means is configured such that the microwave current supply means changes phase differences of the microwave currents applied respectively to the at least two or more auxiliary coils. Therefore, the microwave current can be easily controlled, and thus, a circularly polarized magnetic field with high magnetization inversion efficiency can be generated as an assistance magnetic field.
摘要翻译：本发明的微波辅助磁头包括：布置在书写主极的周边中的至少两个或更多个辅助线圈; 以及微波电流供给装置，其向所述至少两个或更多个辅助线圈施加微波电流。所述至少两个以上的辅助线圈分别包括直线状配置在ABS侧的线状体部，所述至少两个以上的辅助线圈的线状体部的两个以大致正交的位置关系配置，微波电流供给装置被配置为使得微波电流提供装置改变分别施加到至少两个或更多个辅助线圈的微波电流的相位差。因此，可以容易地控制微波电流，因此可以产生具有高磁化反转效率的圆极化磁场作为辅助磁场。

2. 发明申请

US20120230167A1 MICROWAVE ASSISTED MAGNETIC HEAD AND MAGNETIC DISK DEVICE 有权
标题翻译： MICROWAVE辅助磁头和磁性磁盘设备
公开(公告)号：US20120230167A1
公开(公告)日：2012-09-13
申请号：US13045603
申请日：2011-03-11
申请人： Tsutomu AOYAMA , Tetsuya Roppongi , Yoshikazu Soeno , Kiyoshi Noguchi , Isamu Sato
发明人： Tsutomu AOYAMA , Tetsuya Roppongi , Yoshikazu Soeno , Kiyoshi Noguchi , Isamu Sato
IPC分类号： G11B13/04
CPC分类号： G11B5/314 , G11B5/1278 , G11B2005/0024
摘要： A microwave assisted magnetic head of the present invention includes: at least two or more auxiliary coils that are arranged in a periphery of a writing main pole; and microwave current supply means that applies microwave currents to the at least two or more auxiliary coils. The at least two or more auxiliary coils respectively include linear body parts linearly arranged on an ABS side, two of the linear body parts of the at least two or more auxiliary coils are arranged in a substantially orthogonal positional relationship, and the microwave current supply means is configured such that the microwave current supply means changes phase differences of the microwave currents applied respectively to the at least two or more auxiliary coils. Therefore, the microwave current can be easily controlled, and thus, a circularly polarized magnetic field with high magnetization inversion efficiency can be generated as an assistance magnetic field.
摘要翻译：本发明的微波辅助磁头包括：布置在书写主极的周边中的至少两个或更多个辅助线圈; 以及微波电流供给装置，其向所述至少两个或更多个辅助线圈施加微波电流。所述至少两个以上的辅助线圈分别包括直线状配置在ABS侧的线状体部，所述至少两个以上的辅助线圈的线状体部的两个以大致正交的位置关系配置，微波电流供给装置被配置为使得微波电流提供装置改变分别施加到至少两个或更多个辅助线圈的微波电流的相位差。因此，可以容易地控制微波电流，因此可以产生具有高磁化反转效率的圆极化磁场作为辅助磁场。

3. 发明授权

US07791838B2 Magnetic head apparatus and magnetic recording and reproducing apparatus 有权
标题翻译：磁头装置和磁记录和再现装置
公开(公告)号：US07791838B2
公开(公告)日：2010-09-07
申请号：US11790643
申请日：2007-04-26
申请人： Isamu Sato , Yoshikazu Soeno , Koichi Terunuma , Tetsuya Roppongi , Hiroshi Ikeda
发明人： Isamu Sato , Yoshikazu Soeno , Koichi Terunuma , Tetsuya Roppongi , Hiroshi Ikeda
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/02 , G11B5/17 , G11B5/3123 , G11B5/65 , G11B2005/0005 , G11B2005/0029
摘要： A magnetic head apparatus is provided which is capable of recording data in a recoding layer having high coercive force with high accuracy without heating. A magnetic recording and reproducing apparatus is also provided which has the magnetic head apparatus. A recording head has: a main magnetic pole; a recording-side front-end shield (a return magnetic pole); a recording-side rear-end shield (a return magnetic pole); a main coil for generating a perpendicular recording magnetic field at the main magnetic pole; and an auxiliary coil for generating a longitudinal alternating current magnetic field having a frequency in the microwave band at the main magnetic pole.
摘要翻译：提供一种能够在没有加热的情况下以高精度在高矫顽力的记录层中记录数据的磁头装置。还提供一种具有磁头装置的磁记录和重放装置。记录头具有：主磁极; 记录侧前端屏蔽（返回磁极）; 记录侧后端屏蔽（返回磁极）; 用于在主磁极处产生垂直记录磁场的主线圈; 以及用于产生在主磁极处具有微波频带的频率的纵向交流磁场的辅助线圈。

4. 发明申请

US20070253106A1 Magnetic head apparatus and magnetic recording and reproducing apparatus 有权
标题翻译：磁头装置和磁记录和再现装置
公开(公告)号：US20070253106A1
公开(公告)日：2007-11-01
申请号：US11790643
申请日：2007-04-26
申请人： Isamu Sato , Yoshikazu Soeno , Koichi Terunuma , Tetsuya Roppongi , Hiroshi Ikeda
发明人： Isamu Sato , Yoshikazu Soeno , Koichi Terunuma , Tetsuya Roppongi , Hiroshi Ikeda
IPC分类号： G11B5/147 , G11B5/17
CPC分类号： G11B5/1278 , G11B5/02 , G11B5/17 , G11B5/3123 , G11B5/65 , G11B2005/0005 , G11B2005/0029
摘要： A magnetic head apparatus is provided which is capable of recording data in a recoding layer having high coercive force with high accuracy without heating. A magnetic recording and reproducing apparatus is also provided which has the magnetic head apparatus. A recording head has: a main magnetic pole; a recording-side front-end shield (a return magnetic pole); a recording-side rear-end shield (a return magnetic pole); a main coil for generating a perpendicular recording magnetic field at the main magnetic pole; and an auxiliary coil for generating a longitudinal alternating current magnetic field having a frequency in the microwave band at the main magnetic pole.
摘要翻译：提供一种能够在没有加热的情况下以高精度在高矫顽力的记录层中记录数据的磁头装置。还提供一种具有磁头装置的磁记录和重放装置。记录头具有：主磁极; 记录侧前端屏蔽（返回磁极）; 记录侧后端屏蔽（返回磁极）; 用于在主磁极处产生垂直记录磁场的主线圈; 以及用于产生在主磁极处具有微波频带的频率的纵向交流磁场的辅助线圈。

5. 发明申请

US20110248710A1 APPARATUS FOR MEASURING MAGNETIC FIELD OF MICROWAVE-ASSISTED HEAD 有权
标题翻译：用于测量微波辅助磁头的磁场的装置
公开(公告)号：US20110248710A1
公开(公告)日：2011-10-13
申请号：US12755803
申请日：2010-04-07
申请人： Isamu SATO , Hiroshi Ikeda , Mikio Matsuzaki , Tetsuya Roppongi , Noboru Yamanaka , Tsutomu Aoyama
发明人： Isamu SATO , Hiroshi Ikeda , Mikio Matsuzaki , Tetsuya Roppongi , Noboru Yamanaka , Tsutomu Aoyama
IPC分类号： G01R33/02
CPC分类号： G11B5/455 , G01R33/098 , G01R33/1284
摘要： A measuring circuit system in a magnetic field measuring apparatus of the invention has an amplifier and a band-pass filter connected in sequence on an output terminal side of the TMR element, the band-pass filter is a narrow-range band-pass filter such that a peak pass frequency of the filter that is a center is a basic frequency selected from a range of 10 to 40 GHz and a band width centered around the basic frequency is a narrow range of ±0.5 to ±4 GHz; and with the measuring circuit system, an SIN ratio (SNR) of 3 dB or greater is obtained, the SNR being defined by a ratio of an amplitude S of a high-frequency generated signal induced by the TMR element to a total noise N that is a sum of a head noise generated by the TMR element and a circuit noise generated by the amplifier. With such a configuration, an in-plane high-frequency magnetic field generated by a microwave-assisted magnetic head is reliably and precisely measured.
摘要翻译：本发明的磁场测量装置中的测量电路系统具有在TMR元件的输出端侧依次连接的放大器和带通滤波器，带通滤波器是窄范围带通滤波器，作为中心的滤波器的峰值通过频率是从10〜40GHz的范围选择的基本频率，以基本频率为中心的频带宽度为±0.5〜±4GHz的窄范围; 并且利用测量电路系统，获得3dB或更大的SIN比（SNR），SNR由TMR元件引起的高频产生信号的振幅S与总噪声N的比值定义，是由TMR元件产生的头噪声和由放大器产生的电路噪声的总和。通过这样的结构，可以可靠且精确地测量由微波辅助磁头产生的面内高频磁场。

6. 发明授权

US08358127B2 Apparatus for measuring magnetic field of microwave-assisted head 有权
标题翻译：用于测量微波辅助头磁场的装置
公开(公告)号：US08358127B2
公开(公告)日：2013-01-22
申请号：US12755803
申请日：2010-04-07
申请人： Isamu Sato , Hiroshi Ikeda , Mikio Matsuzaki , Tetsuya Roppongi , Noboru Yamanaka , Tsutomu Aoyama
发明人： Isamu Sato , Hiroshi Ikeda , Mikio Matsuzaki , Tetsuya Roppongi , Noboru Yamanaka , Tsutomu Aoyama
IPC分类号： G01R33/02
CPC分类号： G11B5/455 , G01R33/098 , G01R33/1284
摘要： A measuring circuit system in a magnetic field measuring apparatus of the invention has an amplifier and a band-pass filter connected in sequence on an output terminal side of the TMR element, the band-pass filter is a narrow-range band-pass filter such that a peak pass frequency of the filter that is a center is a basic frequency selected from a range of 10 to 40 GHz and a band width centered around the basic frequency is a narrow range of ±0.5 to ±4 GHz; and with the measuring circuit system, an SIN ratio (SNR) of 3 dB or greater is obtained, the SNR being defined by a ratio of an amplitude S of a high-frequency generated signal induced by the TMR element to a total noise N that is a sum of a head noise generated by the TMR element and a circuit noise generated by the amplifier. With such a configuration, an in-plane high-frequency magnetic field generated by a microwave-assisted magnetic head is reliably and precisely measured.
摘要翻译：本发明的磁场测量装置中的测量电路系统具有在TMR元件的输出端侧依次连接的放大器和带通滤波器，带通滤波器是窄范围带通滤波器，作为中心的滤波器的峰值通过频率是从10〜40GHz的范围选择的基本频率，以基本频率为中心的带宽为±0.5〜±4GHz的窄范围; 并且利用测量电路系统，获得3dB或更大的SIN比（SNR），SNR由TMR元件引起的高频产生信号的振幅S与总噪声N的比值定义，是由TMR元件产生的头噪声和由放大器产生的电路噪声的总和。通过这样的结构，可以可靠且精确地测量由微波辅助磁头产生的面内高频磁场。

7. 发明申请

US20070279803A1 THIN-FILM MAGNETIC HEAD, HEAD GIMBAL ASSEMBLY, AND HARD DISK SYSTEM 有权
标题翻译：薄膜磁头，头盖组件和硬盘系统
公开(公告)号：US20070279803A1
公开(公告)日：2007-12-06
申请号：US11756134
申请日：2007-05-31
申请人： Kei Hirata , Tetsuya Roppongi , Kiyoshi Noguchi
发明人： Kei Hirata , Tetsuya Roppongi , Kiyoshi Noguchi
IPC分类号： G11B5/147
CPC分类号： G11B5/1278 , B82Y10/00 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/743
摘要： The invention provides a thin-film magnetic head wherein the combined release angle Φ for a dominant recording magnetic field generated from a magnetic pole layer toward a patterned media for the purpose of recording magnetic information is set to within an angle range of 35° to 65° with respect to a patterned media surface. It is thus possible to invert, with efficiency and reliability, the directions of magnetization of isolate bits lined up on the patterned media for high-density recording.
摘要翻译：本发明提供了一种薄膜磁头，其中用于记录磁信息的从磁极层向图案化介质产生的主要记录磁场的组合释放角Phi设定在35°至65°的角度范围内 °相对于图案化介质表面。因此，可以以效率和可靠性反转排列在图案化介质上的高密度记录的隔离位的磁化方向。

8. 发明授权

US07463449B2 Magnetic head for perpendicular magnetic recording, head gimbal assembly, head arm assembly and magnetic disk drive 有权
标题翻译：用于垂直磁记录的磁头，磁头万向架组件，磁头臂组件和磁盘驱动器
公开(公告)号：US07463449B2
公开(公告)日：2008-12-09
申请号：US11266289
申请日：2005-11-04
申请人： Kei Hirata , Atsushi Yamaguchi , Tetsuya Roppongi , Kiyoshi Noguchi
发明人： Kei Hirata , Atsushi Yamaguchi , Tetsuya Roppongi , Kiyoshi Noguchi
IPC分类号： G11B5/31 , G11B5/127
CPC分类号： G11B5/1278 , G11B5/3113 , G11B5/3116
摘要： A pole layer incorporate a track width defining and a wide portion. A material forming the pole layer is an alloy whose major elements are iron and nickel. In the alloy, where the proportions of iron and nickel with respect to the total of iron and nickel are indicated as (100−M) weight % and M weight %, respectively, M is greater than 0 and smaller than or equal to 10. The internal stress of the pole layer is a tensile stress. The magnetostriction constant of the material forming the pole layer is positive. Where the anisotropy field of the pole layer is Hk (A/m), the magnetostriction constant of the material forming the pole layer is λ(×10−6), and the internal stress of the pole layer is σ (MPa), the value of Hk/(λ×σ) is greater than 0.01 and smaller than 0.2.
摘要翻译：极层包含限定的轨道宽度和宽的部分。形成极层的材料是其主要元素是铁和镍的合金。在合金中，铁和镍相对于铁和镍总量的比例分别表示为（100-M）重量％和M重量％，M大于0且小于或等于10。极层的内应力是拉伸应力。形成极层的材料的磁致伸缩常数为正。在极层的各向异性场为Hk（A / m）的情况下，形成极层的材料的磁致伸缩常数为λ（x10-6），极层的内应力为σ（MPa）的Hk /（lambdaxsigma）大于0.01且小于0.2。

9. 发明授权

US07872831B2 Thin-film magnetic head having a recording head portion configured to record magnetic information on a patterned media, head gimbal assembly, and hard disk system 有权
标题翻译：具有记录头部分的薄膜磁头被配置为在图案化介质，磁头万向节组件和硬盘系统上记录磁信息
公开(公告)号：US07872831B2
公开(公告)日：2011-01-18
申请号：US11756134
申请日：2007-05-31
申请人： Kei Hirata , Tetsuya Roppongi , Kiyoshi Noguchi
发明人： Kei Hirata , Tetsuya Roppongi , Kiyoshi Noguchi
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , B82Y10/00 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/743
摘要： The invention provides a thin-film magnetic head wherein the combined release angle Φ for a dominant recording magnetic field generated from a magnetic pole layer toward a patterned media for the purpose of recording magnetic information is set to within an angle range of 35° to 65° with respect to a patterned media surface. It is thus possible to invert, with efficiency and reliability, the directions of magnetization of isolate bits lined up on the patterned media for high-density recording.
摘要翻译：本发明提供了一种薄膜磁头，其中用于记录磁信息的从磁极层向图案化介质产生的主要记录磁场的组合释放角Φ设定在35°至65°的角度范围内 °相对于图案化介质表面。因此，可以以效率和可靠性反转排列在图案化介质上的高密度记录的隔离位的磁化方向。

10. 发明申请

US20110222185A1 Magnetic Recording Apparatus Provided with Microwave-Assisted Head 有权
标题翻译：配有微波辅助头的磁记录装置
公开(公告)号：US20110222185A1
公开(公告)日：2011-09-15
申请号：US12721034
申请日：2010-03-10
申请人： Tetsuya Roppongi , Takuya Adachi , Isamu Sato , Hiroshi Ikeda , Mikio Matsuzaki
发明人： Tetsuya Roppongi , Takuya Adachi , Isamu Sato , Hiroshi Ikeda , Mikio Matsuzaki
IPC分类号： G11B5/02
CPC分类号： G11B5/1278 , G11B2005/001 , G11B2005/0024
摘要： A magnetic recording apparatus includes a magnetic recording medium having a magnetic recording layer, a thin-film magnetic head with a microwave-band magnetic drive function, the head having a write field generation means that generates a write field to the magnetic recording medium in response to a write signal, and a microwave generator that is provided independent of the write field generation means and generates an alternating magnetic field in plane having a microwave-band frequency when microwave-excitation current is fed, an excitation current generation means that generates the microwave-excitation current by amplitude-modulating microwave carrier current with a modulating signal having a fixed period, and a write signal supply means that generates the write signal and applies it to the write field generation means of the thin-film magnetic head.
摘要翻译：磁记录装置包括具有磁记录层的磁记录介质，具有微波带磁驱动功能的薄膜磁头，该磁头具有写磁场产生装置，以响应于该磁场记录介质产生写磁场写入信号，和独立于写入场产生装置提供的微波发生器，并且当馈送微波激励电流时产生具有微波频带频率的平面中的交变磁场;产生微波的激励电流产生装置 - 具有固定周期的调制信号的幅度调制微波载波电流的激励电流;以及产生写入信号并将其施加到薄膜磁头的写入场发生装置的写入信号提供装置。

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