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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。
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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。
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公开(公告)号：US08264916B1
公开(公告)日：2012-09-11
申请号：US13045603
申请日：2011-03-11
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。
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公开(公告)号：US08547655B2
公开(公告)日：2013-10-01
申请号：US13297377
申请日：2011-11-16
申请人： Tsutomu Aoyama , Hiroshi Ikeda , Isamu Sato
发明人： Tsutomu Aoyama , Hiroshi Ikeda , Isamu Sato
IPC分类号： G11B5/02
CPC分类号： G11B5/3133 , G11B2005/0024
摘要： A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.
摘要翻译： 用于磁记录介质的记录层的磁记录方法使用具有子线圈或微波辐射器的薄膜磁头。 在该方法中，微波扩频（SS）信号施加到子线圈或微波辐射器，微波SS信号包括记录层的铁磁共振（FMR）频率作为频带内的载波，以便 产生平面内的高频磁场，使得记录层的磁化反转磁场Hsw降低。 在记录层的磁化反转磁场Hsw降低的同时进行磁记录。
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公开(公告)号：US08300346B2
公开(公告)日：2012-10-30
申请号：US12750870
申请日：2010-03-31
申请人： Hiroshi Ikeda , Isamu Sato , Kiyoshi Noguchi , Tsutomu Aoyama , Takuya Adachi
发明人： Hiroshi Ikeda , Isamu Sato , Kiyoshi Noguchi , Tsutomu Aoyama , Takuya Adachi
CPC分类号： G11B5/314 , G11B5/1278 , G11B2005/0024
摘要： A gap between a main pole and auxiliary pole composing a thin film magnetic head having a microwave assisted function of the present invention is filled with a nonmagnetic dielectric layer to embed a microwave radiator. The nonmagnetic dielectric layer has an inclined surface at a end on a side of an opposing medium surface by which the microwave radiated from the microwave radiator to be bent toward the main pole, whereby the microwave magnetic field generated from the microwave generator can be gathered immediately below the main pole, further improving the microwave assisted effect.
摘要翻译： 构成本发明的具有微波辅助功能的薄膜磁头的主极和辅助极之间的间隙填充有非磁性介电层以嵌入微波辐射器。 非磁性介电层在相对的介质表面的一侧的端部具有倾斜表面，微波从微波辐射器辐射到微波辐射器，从而微波发生器产生的微波磁场可以立即收集 主杆下方进一步提高微波辅助效果。
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公开(公告)号：US20110242696A1
公开(公告)日：2011-10-06
申请号：US12750870
申请日：2010-03-31
申请人： Hiroshi IKEDA , Isamu Sato , Kiyoshi Noguchi , Tsutomu Aoyama , Takuya Adachi
发明人： Hiroshi IKEDA , Isamu Sato , Kiyoshi Noguchi , Tsutomu Aoyama , Takuya Adachi
IPC分类号： G11B5/02
CPC分类号： G11B5/314 , G11B5/1278 , G11B2005/0024
摘要： A gap between a main pole and auxiliary pole composing a thin film magnetic head having a microwave assisted function of the present invention is filled with a nonmagnetic dielectric layer to embed a microwave radiator. The nonmagnetic dielectric layer has an inclined surface at a end on a side of an opposing medium surface by which the microwave radiated from the microwave radiator to be bent toward the main pole, whereby the microwave magnetic field generated from the microwave generator can be gathered immediately below the main pole, further improving the microwave assisted effect.
摘要翻译： 构成本发明的具有微波辅助功能的薄膜磁头的主极和辅助极之间的间隙填充有非磁性介电层以嵌入微波辐射器。 非磁性介电层在相对的介质表面的一侧的端部具有倾斜表面，微波从微波辐射器辐射到微波辐射器，从而微波发生器产生的微波磁场可以立即收集 主杆下方进一步提高微波辅助效果。
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公开(公告)号：US06898840B1
公开(公告)日：2005-05-31
申请号：US09506224
申请日：2000-02-17
申请人： Masashi Shiraishi , Izumi Nomura , Tsutomu Aoyama , Isamu Sato , Masanori Sakai , Tsuyoshi Umehara , Kenichi Takano , Haruyuki Morita
发明人： Masashi Shiraishi , Izumi Nomura , Tsutomu Aoyama , Isamu Sato , Masanori Sakai , Tsuyoshi Umehara , Kenichi Takano , Haruyuki Morita
CPC分类号： G11B5/486 , G11B5/012 , G11B5/40 , G11B5/4806 , G11B5/6011 , G11B33/142 , Y10T29/49025 , Y10T29/49027 , Y10T29/4913 , Y10T29/49144
摘要： A method of fabricating a magnetic head device comprising a slider having a magnetic head element, a suspension structure made of a thin resilient material and having one end supporting the slider and the other end to be attached to another member, and a head IC chip. The head IC chip is mounted on the suspension structure so as to face a magnetic recording disc and at a position spaced from the slider-supporting one end of the suspension structure by an intervening portion of the suspension structure. The position is selected so that the intervening portion is effective to suppress a temperature increase in the head IC chip due to at least thermal conduction through the intervening portion.
摘要翻译： 一种制造磁头装置的方法，该磁头装置包括具有磁头元件的滑块，由弹性弹性材料制成的悬挂结构，并且具有一端支撑滑动件，另一端支撑于另一个构件，以及头IC芯片。 头部IC芯片安装在悬挂结构上，以便面对磁记录盘，并且在与悬架结构的滑块支撑的一端间隔开悬挂结构的中间部分的位置处。 选择位置使得中间部分有效地抑制由于至少通过中间部分的热传导而头部IC芯片的温度升高。
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公开(公告)号：US06313969B1
公开(公告)日：2001-11-06
申请号：US09285758
申请日：1999-04-05
申请人： Kazuhiro Hattori , Tsutomu Aoyama , Isamu Sato
发明人： Kazuhiro Hattori , Tsutomu Aoyama , Isamu Sato
IPC分类号： G11B582
CPC分类号： G11B5/31 , G11B5/012 , G11B5/09 , G11B5/4886 , G11B5/746 , G11B5/82 , G11B5/855 , G11B2005/0002 , Y10S977/932
摘要： A magnetic disk medium of the invention comprises a disk form of substrate, a multiplicity of unit minuscule recording areas formed of a magnetic material on the substrate to magnetically record information thereon and located concentrically or spirally at an interval in a peripheral or radial direction, and a non-recording area provided on the substrate and formed of a non-magnetic material that is embedded between the unit minuscule recording areas. Each unit minuscule recording area is in a form having a major axis and a minor axis, wherein the direction of the major axis is aligned with the radial direction of the substrate.
摘要翻译： 本发明的磁盘介质包括盘形式的衬底，多个由基片上的磁性材料形成的单位微小的记录区域，用于在其上磁记录信息，并以周向或螺旋方式以周边或径向的间隔定位， 设置在基板上并由非磁性材料形成的非记录区域，该非磁性材料嵌入在单元微小的记录区域之间。 每个单元微小的记录区域是具有长轴和短轴的形式，其中长轴的方向与基板的径向对准。
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公开(公告)号：US6084746A
公开(公告)日：2000-07-04
申请号：US33789
申请日：1998-03-03
申请人： Masashi Shiraishi , Izumi Nomura , Tsutomu Aoyama , Isamu Sato , Masanori Sakai , Tsuyoshi Umehara , Kenichi Takano , Haruyuki Morita
发明人： Masashi Shiraishi , Izumi Nomura , Tsutomu Aoyama , Isamu Sato , Masanori Sakai , Tsuyoshi Umehara , Kenichi Takano , Haruyuki Morita
CPC分类号： G11B5/486 , G11B33/142 , G11B5/012 , G11B5/4806 , G11B5/40 , G11B5/6011
摘要： There is disclosed a magnetic disc device wherein temperature increase in the head IC chip can effectively suppressed. The magnetic head device comprises a slider having a magnetic head, a suspension structure having one end supporting the slider, and a head IC chip, the head IC chip being mounted on the suspension structure at a side adapted to be faced to a magnetic recording disc. A flow of air produced by the rotation of the magnetic disc cols the head IC chip in operation.
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10.发明申请MICROWAVE ASSISTED MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING METHOD THEREWITH 有权MICROWAVE辅助磁记录头和磁记录方法公开(公告)号：US20120320474A1
公开(公告)日：2012-12-20
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
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 soil 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土壤磁膜，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。
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