公开(公告)号：US08174937B2

公开(公告)日：2012-05-08

申请号：US12550662

申请日：2009-08-31

申请人： Hiroshi Ikeda ,  Kiyoshi Noguchi ,  Saori Kajihara ,  Isamu Sato

发明人： Hiroshi Ikeda ,  Kiyoshi Noguchi ,  Saori Kajihara ,  Isamu Sato

IPC分类号： G11B11/00

CPC分类号： G11B5/1278 ,  G11B2005/001 ,  G11B2005/0024

摘要： A thin-film magnetic head having microwave magnetic exciting function includes a write magnetic field production means for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, and at least line conductor of a microwave radiator of a plane-structure type, formed independent from the write magnetic field production means, for radiating, by feeding there through a microwave excitation current, a microwave band resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency FR of the magnetic recording medium.

摘要翻译： 具有微波磁激励功能的薄膜磁头包括写入磁场产生装置，用于响应于写入信号产生要施加到磁记录介质中的写入磁场，以及至少微波辐射器的线路导体 的平面结构型，与写入磁场产生装置无关，用于通过微波激励电流向其馈送具有等于或接近铁磁共振频率FR的频率的微波频带共振磁场 的磁记录介质。

公开(公告)号：US08107352B1

公开(公告)日：2012-01-31

申请号：US12852775

申请日：2010-08-09

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

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

IPC分类号： G11B7/00 ,  G11B5/147

CPC分类号： G11B5/314 ,  G11B5/1278 ,  G11B2005/0024

摘要： A microwave assisted magnetic head is formed to include a main pole magnetic layer including a main pole; a shielded magnetic layer including a shielded pole; a recording coil that is formed to generate a writing magnetic field from a tip of the main pole; and a microwave radiation waveguide made of a conductive nonmagnetic material that is disposed in a recording gap, the recording gap being a gap between the main pole and the shielded pole. The main pole magnetic layer and the shielded magnetic layer have an intermediate connection part that connects the layers at a depth-side, and an electrical insulation magnetic film is disposed in the intermediate connection part, and the main pole and the shielded pole are electrically connected with the microwave radiation waveguide that is disposed in the recording gap, which is the gap between the main pole and the shielded pole so that a simple configuration, with a relatively easy and efficient manufacturing process, is realized that overlaps AC magnetic fields in an in-plane direction of a microwave band, which is the same as, or close to, a ferromagnetic resonant frequency of a medium recording layer.

摘要翻译： 微波辅助磁头形成为包括主极的主极磁性层; 包括屏蔽极的屏蔽磁性层; 形成为从主极的尖端产生书写磁场的记录线圈; 以及设置在记录间隙中的由导电非磁性材料制成的微波辐射波导，记录间隙是主极和屏蔽极之间的间隙。 主极磁性层和屏蔽磁性层具有在深度侧连接层的中间连接部，并且在中间连接部中设置电绝缘性的磁性膜，并且主极和屏蔽极电气连接 利用布置在作为主极和屏蔽极之间的间隙的记录间隙中的微波辐射波导，从而实现了具有相对简单和有效的制造工艺的简单配置，其与交流磁场重叠， 与介质记录层的铁磁谐振频率相同或接近的微波频带的平面方向。

公开(公告)号：US07733611B2

公开(公告)日：2010-06-08

申请号：US11679814

申请日：2007-02-27

申请人： Isamu Sato ,  Rachid Sbiaa

发明人： Isamu Sato ,  Rachid Sbiaa

IPC分类号： G11B5/39

CPC分类号： H01L43/08 ,  G11B5/3912

摘要： A magnetoresistance effect element comprises a free layer composed of a ferromagnetic layer, a pinned layer composed of a ferromagnetic layer, and a layer disposed between the free layer and the pinned layer and including at least one nano-contact portion disposed at least one portion between the free layer and the pinned layer. The nano-contact portion has a dimension, including at least one of a length in the layer lamination direction and a length in a direction normal to the layer lamination direction, being not more than Fermi length. The nano-contact portion is provided, in an inside portion thereof, with a magnetic wall composed of either one of Bloch magnetic wall, Nëel magnetic wall or a combination wall thereof.

摘要翻译： 磁阻效应元件包括由铁磁层组成的自由层，由铁磁层组成的被钉扎层和设置在自由层和钉扎层之间的层，并且包括至少一个纳米接触部分， 自由层和钉扎层。 纳米接触部分具有包括层叠方向上的长度和垂直于层叠方向的方向上的长度中的至少一个的尺寸，不大于费米长度。 纳米接触部分在其内部设置有由布洛赫磁性壁，奈尔磁性壁或其组合壁中的任一个组成的磁性壁。

公开(公告)号：US20090290267A1

公开(公告)日：2009-11-26

申请号：US12470150

申请日：2009-05-21

申请人： Hiroshi Ikeda ,  Saori Kajihara ,  Kiyoshi Noguchi ,  Isamu Sato

发明人： Hiroshi Ikeda ,  Saori Kajihara ,  Kiyoshi Noguchi ,  Isamu Sato

IPC分类号： G11B5/33

CPC分类号： B82Y10/00 ,  B82Y25/00 ,  G11B5/3967 ,  G11B25/043 ,  G11B33/08 ,  G11B2005/001 ,  G11B2005/0024 ,  G11B2005/3996

摘要： A magnetic recording and reproducing apparatus with a thin-film magnetic head having microwave magnetic exciting function, includes a metal housing, a magnetic recording medium, arranged in the metal housing, having a magnetic recording layer, and a thin-film magnetic head, arranged in the metal housing, having a write magnetic field production unit and a resonance magnetic field production unit. The write magnetic field production unit produces, in response to a write signal, a write magnetic field to be applied into the magnetic recording layer, and the resonance magnetic field production unit produces, in response to a microwave excitation signal, a resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency FR of a the magnetic recording layer. The apparatus further includes a write signal generation unit, arranged in the metal housing, for generating the write signal, a microwave signal generation unit, arranged in the metal housing, for generating the microwave excitation signal, a transmission unit, arranged in the metal housing, for feeding the microwave excitation signal generated by the microwave signal generation unit to the resonance magnetic field production unit in the thin-film magnetic head and for feeding the write signal generated by the write signal generation unit to the write magnetic field production unit in the thin-film magnetic head, and a plurality of metal ribs, arranged in the metal housing, for forming a plurality of cavities, each of the plurality of cavities having a rectangular horizontal section shape and having dimensions to produce no resonance at a frequency of the microwave excitation signal.

摘要翻译： 具有微波磁激励功能的薄膜磁头的磁记录和重放装置包括布置在具有磁记录层的金属外壳中的金属外壳，磁记录介质和薄膜磁头， 在金属外壳中，具有写入磁场产生单元和共振磁场产生单元。 写入磁场产生单元响应于写入信号产生要施加到磁记录层中的写入磁场，并且谐振磁场产生单元响应于微波激励信号产生具有 等于或者在磁记录层的铁磁共振频率FR附近的范围内的频率。 该装置还包括写入信号生成单元，布置在金属外壳中用于产生写入信号，布置在金属外壳中的用于产生微波激励信号的微波信号产生单元，布置在金属外壳中的传输单元 ，用于将由微波信号生成单元生成的微波激励信号馈送到薄膜磁头中的共振磁场产生单元，并将由写入信号生成单元生成的写信号馈送到写入磁场产生单元 薄膜磁头和多个金属肋，布置在金属壳体中，用于形成多个空腔，多个空腔中的每一个具有矩形水平截面形状，并且具有尺寸以便在频率处不产生共振 微波激励信号。

公开(公告)号：US20090009915A1

公开(公告)日：2009-01-08

申请号：US12179293

申请日：2008-07-24

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： C23C14/46 ,  B82Y25/00 ,  B82Y30/00 ,  B82Y40/00 ,  G11B5/3903 ,  H01F10/3227 ,  H01F10/3272 ,  H01F41/18 ,  H01F41/301 ,  H01F41/305 ,  H01L43/12

摘要： A method of generating a thin film for use in a spin valve of a magnetoresistive (MR) sensor having a nano-constricted spacer is provided. The bottom portion of the spin valve is deposited up to the pinned layer, a deposition chamber is provided, and the spacer layer is sputtered thereon. A main ion beam generates ions onto a composite surface including magnetic chips and insulator material. Simultaneously, an assisted ion beam provides ions directly to the substrate, thus improving the softness of the free layer and smoothness of the spacer layer. Neutralizers are also provided to prevent ion repulsion and improve ion beam focus. As a result, a thin film spacer can be formed, and the nano-constricted MR spin valve having low free layer coercivity and low interlayer coupling between the free layer and pinned layer is formed.

摘要翻译： 提供一种生产用于具有纳米收缩间隔物的磁阻（MR）传感器的自旋阀中的薄膜的方法。 自旋阀的底部沉积到被钉扎层，设置沉积室，并且间隔层溅射在其上。 主离子束产生离子到包括磁性芯片和绝缘体材料的复合表面上。 同时，辅助离子束将离子直接提供给衬底，从而提高了自由层的柔软度和间隔层的平滑度。 还提供中和剂以防止离子排斥并改善离子束聚焦。 结果，可以形成薄膜间隔物，并且形成自由层和被钉扎层之间具有低自由层矫顽力和低层间耦合的纳米收缩的MR自旋阀。

公开(公告)号：US07184247B2

公开(公告)日：2007-02-27

申请号：US10882322

申请日：2004-07-02

申请人： Isamu Sato ,  Rachid Sbiaa

发明人： Isamu Sato ,  Rachid Sbiaa

IPC分类号： G11B5/39

CPC分类号： H01L43/08 ,  G11B5/3912

摘要： A magnetoresistanee effect element comprises a free layer composed of a ferromagnetic layer, a pinned layer composed of a ferromagnetic layer, and a layer disposed between the free layer and the pinned layer and including at least one nano-contact portion disposed between the free layer and the pinned layer. The nano-contact portion has a dimension, including at least one of a length in the layer lamination direction and a length in a direction normal to the layer lamination direction, being not more than Fermi length. The nano-contact portion is provided, in an inside portion thereof, with a magnetic wall composed of either one of Bloch magnetic wall, Neel magnetic wall or a combination wall thereof.

摘要翻译： 磁阻效应元件包括由铁磁性层构成的自由层，由铁磁层组成的被钉扎层和设置在自由层和被钉扎层之间的层，并且包括设置在自由层与自由层之间的至少一个纳米接触部分 固定层。 纳米接触部分具有包括层叠方向上的长度和垂直于层叠方向的方向上的长度中的至少一个的尺寸，不大于费米长度。 纳米接触部分在其内部设置有由Bloch磁性壁，Neel磁性壁或其组合壁中的任一个组成的磁性壁。

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：US20060114620A1

公开(公告)日：2006-06-01

申请号：US10998660

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 ,  G11B5/127

CPC分类号： H01L43/08 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3929 ,  G11B2005/3996

摘要： A reader of a magnetoresistive head includes a granular type free layer. The magnetoresistive head is for a current-perpendicular to plane type, and can be used in either a giant magnetoresistance (GMR) or ballistic magnetoresistance (BMR) scheme. The granular type free layer includes an insulating matrix, for example but not by way of limitation, Al2O3, and metal magnetic grains, for example but not by way of limitation, Ni, CoFe or NiFe. The metal grain size is about 10 to 30 nm, and the effect of having these grains interspersed in the insulative matrix is to provide a softer granular type free layer having a low magnetization. Accordingly, the granular type free layer of the present invention can be made thicker, on the order of about 5 to 10 nm, thus further improving overall thermal stability, reducing spin transfer effect and improving output read signal.

摘要翻译： 磁阻头的读取器包括粒状自由层。 磁阻头用于电流垂直于平面型，可用于巨磁电阻（GMR）或弹道磁阻（BMR）方案。 颗粒状自由层包括绝缘基质，例如但不限于Al 2 O 3，和金属磁性颗粒，例如但不限于 Ni，CoFe或NiFe。 金属粒径为10〜30nm左右，散布在绝缘基体中的这些晶粒的效果是提供具有低磁化强度的较软的粒状自由层。 因此，可以使本发明的粒状自由层的厚度约为5〜10nm左右，从而进一步提高整体热稳定性，降低自旋转移效果，提高输出读出信号。

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

IPC分类号： G11B5/012 ,  G11B5/40 ,  G11B5/48 ,  G11B5/60 ,  G11B33/14 ,  G11B5/53

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。

公开(公告)号：US06888702B2

公开(公告)日：2005-05-03

申请号：US10025694

申请日：2001-12-26

申请人： Isamu Sato ,  Koji Shimazawa ,  Satoru Araki

发明人： Isamu Sato ,  Koji Shimazawa ,  Satoru Araki

IPC分类号： G11B5/31 ,  G11B5/33 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/3143 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

摘要： In a thin film magnetic head device including a reading giant magneto-resistive thin film magnetic head element whose electric equivalent circuit is expressed by a series circuit of an equivalent voltage source and a series resistor RH and a parallel capacitor C connected in parallel with said series circuit, inductor L is connected in series with said series resistor RH and a parallel resistor R is connected in series with said parallel capacitor C. The coil L and parallel capacitor C are set such that an angular frequency ω0=1/(LC)1/2, an angular frequency ω1=1/CR and an angular frequency ωH=1/CRH satisfy conditions of ω0>ω1 and ω0>ωH, preferably ω0>>ω1 and ω0>>ωH to extend a frequency characteristic toward a high frequency range.

摘要翻译： 在一种薄膜磁头装置中，包括一个读取巨磁阻薄膜磁头元件，其电等效电路由等效电压源和串联电阻R＆amp; H＆amp; H的串联电路表示，并且 与所述串联电路并联连接的电容器C，电感器L与所述串​​联电阻器R H串联连接，并联电阻器R与所述并联电容器C串联连接。线圈L和并联电容器 C被设置为使得角频率ω= 0/1 /（LC）1/2 1/2，角频率ω1/1 / CR 并且角频率ω1 H 1 = CR 1 / CR H 2满足ωω0 <ω2ωω1＆lt; 1＆lt; 1＆ 优选地，ω≥0ωω0 以使频率特性向高频范围扩展。