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1. 发明授权

US08107352B1 Microwave assisted magnetic head 有权
标题翻译：微波辅助磁头
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。

2. 发明授权

US08027110B1 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：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。

3. 发明申请

US20120033534A1 MICROWAVE ASSISTED MAGNETIC HEAD 有权
标题翻译： MICROWAVE辅助磁头
公开(公告)号：US20120033534A1
公开(公告)日：2012-02-09
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： G11B11/00
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。

4. 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。

5. 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。

6. 发明授权

US08094399B2 Magnetic recording apparatus provided with microwave-assisted head 有权
标题翻译：带有微波辅助头的磁记录装置
公开(公告)号：US08094399B2
公开(公告)日：2012-01-10
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。

7. 发明授权

US08300346B2 Microwave assisted magnetic head 有权
标题翻译：微波辅助磁头
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。

8. 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。

9. 发明授权

US08174937B2 Thin-film magnetic head having microwave magnetic exciting function and magnetic recording and reproducing apparatus 有权
标题翻译：具有微波磁激励功能的薄膜磁头和磁记录和重放装置
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。

10. 发明申请

US20090290267A1 Magnetic Recording and Reproducing Apparatus with Thin-Film Magnetic Head Having Microwave Magnetic Exciting Function 有权
标题翻译：具有微波磁激励功能的薄膜磁头的磁记录和再现装置
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。

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