公开(公告)号：US07538978B2

公开(公告)日：2009-05-26

申请号：US11319164

申请日：2005-12-28

申请人： Isamu Sato ,  Taro Oike ,  Naoki Hanashima

发明人： Isamu Sato ,  Taro Oike ,  Naoki Hanashima

IPC分类号： G11B5/00

CPC分类号： G11B5/1278 ,  G11B2005/0021 ,  G11B2005/0029

摘要： A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

摘要翻译： 提供了一种热辅助磁记录头，当磁记录区域被加热激光束加热并且可以减小其尺寸和重量时，可以防止激光二极管中的热量的影响。 在热辅助磁记录头中，记录磁极，磁记录元件，磁读取元件，光波导和照射光波导安装在设置在悬架下方的浮动滑块上。 激光二极管布置在与浮动滑块的悬架的相对侧上。 从激光二极管发射的加热激光束通过光波导被引导到照射光波导，使得从记录光波导出射的加热激光束照射磁记录介质。

公开(公告)号：US20060187564A1

公开(公告)日：2006-08-24

申请号：US11319164

申请日：2005-12-28

申请人： Isamu Sato ,  Taro Oike ,  Naoki Hanashima

发明人： Isamu Sato ,  Taro Oike ,  Naoki Hanashima

IPC分类号： G11B5/02

CPC分类号： G11B5/1278 ,  G11B2005/0021 ,  G11B2005/0029

摘要： A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

摘要翻译： 提供了一种热辅助磁记录头，当磁记录区域被加热激光束加热并且可以减小其尺寸和重量时，可以防止激光二极管中的热量的影响。 在热辅助磁记录头中，记录磁极，磁记录元件，磁读取元件，光波导和照射光波导安装在设置在悬架下方的浮动滑块上。 激光二极管布置在与浮动滑块的悬架的相对侧上。 从激光二极管发射的加热激光束通过光波导被引导到照射光波导，使得从记录光波导出射的加热激光束照射磁记录介质。

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。

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。

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

IPC分类号： G11B5/02 ,  G11B5/127

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。

公开(公告)号：US08027110B1

公开(公告)日：2011-09-27

申请号：US12844348

申请日：2010-07-27

申请人： Noboru Yamanaka ,  Tomoyuki Sasaki ,  Takuya Adachi ,  Isamu Sato ,  Hiroshi Ikeda

发明人： Noboru Yamanaka ,  Tomoyuki Sasaki ,  Takuya Adachi ,  Isamu Sato ,  Hiroshi Ikeda

IPC分类号： G11B27/36

CPC分类号： G01R33/091 ,  G11B5/314 ,  G11B2005/0024

摘要： A measurement circuit system of a magnetic field measurement apparatus of the present invention includes an amplifier, a mixer circuit and a band-pass filter that are connected in order on an output end side of a microstrip line or a coplanar wave guide, which is an in-plane high frequency magnetic field intensity measurement element, a frequency immediately before being inputted in the band-pass filter is down-converted by the mixer circuit to a frequency so that a band width of the band-pass filter can be used, the band-pass filter uses a narrow band of ±0.5-±10 KHz (1 KHz-20 KHz as a bandwidth) centering a fundamental frequency selected from 5-20 MHz that is down-converted by the mixer circuit as a center peak passing frequency, and the measurement circuit system is configured to obtain 3 dB or greater of a signal-to-noise ratio (SNR) that is a ratio of S with N; where S represents the reproduction voltage (reproduction output) of the high frequency reproduction signal induced by the in-plane high frequency magnetic field intensity measurement element, and N represents a total noise voltage of a circuit noise including a noise generated by the in-plane high frequency magnetic field intensity measurement element. Therefore, the in-plane high frequency magnetic field that a microwave-assisted magnetic head generates can be measured with high reliability and precision.

摘要翻译： 本发明的磁场测量装置的测量电路系统包括在微带线或共面波导的输出端侧依次连接的放大器，混频器电路和带通滤波器，它是 在平面内的高频磁场强度测量元件中，紧接在带通滤波器中输入的频率由混频器电路下变频到频率，使得可以使用带通滤波器的带宽， 带通滤波器采用±0.5〜10KHz（1KHz-20KHz作为带宽）的中心峰值通过频率，该频带以选择5-20MHz的基频为中心，由频率调制器电路进行下变频 并且测量电路系统被配置为获得S与N的比率的3dB或更大的信噪比（SNR）; 其中S表示由面内高频磁场强度测量元件感应的高频再现信号的再现电压（再现输出），N表示包括由平面内高频磁场强度测量元件产生的噪声的电路噪声的总噪声电压 高频磁场强度测量元件。 因此，可以高可靠性和精度地测量微波辅助磁头产生的平面内高频磁场。

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。

公开(公告)号：US07583482B2

公开(公告)日：2009-09-01

申请号：US10998637

申请日：2004-11-30

申请人： Rachid Sbiaa ,  Isamu Sato ,  Haruyuki Morita

发明人： Rachid Sbiaa ,  Isamu Sato ,  Haruyuki Morita

IPC分类号： G11B5/33

CPC分类号： H01L43/08 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/1278 ,  G11B5/3909 ,  G11B5/3932 ,  G11B2005/0018 ,  G11B2005/0029 ,  G11B2005/3996

摘要： An in-stack bias is provided for stabilizing the free layer of a ballistic magneto resistive (BMR) sensor. In-stack bias includes a decoupling layer that is a spacer between the free layer and a ferromagnetic stabilizer layer of the in-stack bias, and an anti-ferromagnetic layer positioned above the ferromagnetic layer. The spacer is a nano-contact layer having magnetic particles positioned in a non-magnetic matrix. The free layer may be single layer, composed or synthetic, and the in-stack bias may be laterally bounded by the sidewalls, or alternatively, extend above the sidewalls and spacer. Additionally, a hard bias may also be provided. The spacer of the in-stack bias results in the reduction of the exchange coupling between the free layer and ferromagnetic stabilizing layer, an improved AΔR due to confinement of current flow through a smaller area, and increased MR due to the domain wall created within the magnetic nano-contact.

摘要翻译： 提供堆叠偏压以稳定弹道磁阻（BMR）传感器的自由层。 堆叠内偏压包括去耦层，其是自由层与堆叠内偏压的铁磁稳定层之间的隔离层，以及位于铁磁层上方的反铁磁层。 间隔物是具有位于非磁矩阵中的磁性颗粒的纳米接触层。 自由层可以是单层的，组成的或合成的，叠层间偏压可以由侧壁横向界定，或者替代地在侧壁和间隔物上方延伸。 另外，还可以提供硬偏压。 堆叠偏压的间隔物导致自由层和铁磁稳定层之间的交换耦合的减少，由于电流流过较小区域的限制而导致的改进的ADeltaR以及由于在 磁性纳米接触。

公开(公告)号：US20080151436A1

公开(公告)日：2008-06-26

申请号：US11907095

申请日：2007-10-09

申请人： Isamu Sato ,  Tetsuya Roppongi ,  Yuichi Watabe ,  Norikazu Ota ,  Hiroshi Ikeda ,  Mikio Matsuzaki

发明人： Isamu Sato ,  Tetsuya Roppongi ,  Yuichi Watabe ,  Norikazu Ota ,  Hiroshi Ikeda ,  Mikio Matsuzaki

IPC分类号： G11B5/33

CPC分类号： G11B5/3123 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/743 ,  G11B2005/0005

摘要： Provided is a thin-film magnetic head capable of writing data with high accuracy on a magnetic recording medium having high coercive force without heating. The head comprises an electromagnetic coil element comprising: a main magnetic pole; an auxiliary magnetic pole; and a write coil formed so as to pass through at least between the main magnetic pole and the auxiliary magnetic pole, for generating the write magnetic field. In this head, a part of the write coil has a layered structure of: a resonance coil layer for generating a resonance magnetic field having ferromagnetic resonance frequency of a magnetic recording layer of a magnetic recording medium or having a frequency in the vicinity thereof; and a write coil layer. And further, the resonance coil layer and the write coil layer sandwich an insulating layer therebetween.

摘要翻译： 提供了一种能够在没有加热的情况下在具有高矫顽力的磁记录介质上高精度地写入数据的薄膜磁头。 头部包括电磁线圈元件，包括：主磁极; 辅助磁极; 以及形成为至少在主磁极和辅助磁极之间通过的用于产生写入磁场的写入线圈。 在该磁头中，写入线圈的一部分具有以下结构：谐振线圈层，用于产生具有磁记录介质的磁记录层的铁磁共振频率或其附近频率的共振磁场; 和写入线圈层。 此外，共振线圈层和写入线圈层之间夹有绝缘层。

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。