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1. 发明申请

US20100073804A1 Thin-Film Magnetic Head Having Microwave Magnetic Exciting Function And Magnetic Recording And Reproducing Apparatus 有权
标题翻译：具有微波激磁功能的薄膜磁头和磁记录和再现装置
公开(公告)号：US20100073804A1
公开(公告)日：2010-03-25
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： G11B5/02
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频率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。

2. 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。

3. 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。

4. 发明授权

US08184395B2 Magnetic recording and reproducing apparatus with thin-film magnetic head having microwave magnetic exciting function 有权
标题翻译：具有微波磁激发功能的薄膜磁头的磁记录和重放装置
公开(公告)号：US08184395B2
公开(公告)日：2012-05-22
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： G11B5/012
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 includes a metal housing, a magnetic recording medium having a magnetic recording layer, and a thin-film magnetic head having a write magnetic field production unit and a resonance magnetic field production unit. The apparatus further includes a write signal generation unit for generating the write signal, a microwave signal generation unit for generating the microwave excitation signal, a transmission unit for feeding the microwave excitation signal to the resonance magnetic field production unit and for feeding the write signal to the write magnetic field production unit, 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：磁记录和再现装置包括金属外壳，具有磁记录层的磁记录介质和具有写入磁场产生单元和共振磁场产生单元的薄膜磁头。该装置还包括用于产生写入信号的写入信号产生单元，用于产生微波激励信号的微波信号产生单元，用于将微波激励信号馈送到谐振磁场产生单元并用于将写入信号馈送到写入磁场产生单元和布置在金属外壳中的多个金属肋，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在微波激发信号的频率下不产生谐振的尺寸。

5. 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。

6. 发明申请

US20110242696A1 MICROWAVE ASSISTED MAGNETIC HEAD 有权
标题翻译： MICROWAVE辅助磁头
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。

7. 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。

8. 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。

9. 发明授权

US08547655B2 Magnetic recording method using microwave assisted head 有权
标题翻译：磁记录方法使用微波辅助头
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。

10. 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。

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