公开(公告)号：US20120230167A1

公开(公告)日：2012-09-13

申请号：US13045603

申请日：2011-03-11

Applicant: Tsutomu AOYAMA ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Kiyoshi Noguchi ,  Isamu Sato

Inventor： Tsutomu AOYAMA ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Kiyoshi Noguchi ,  Isamu Sato

IPC: G11B13/04

CPC classification number: G11B5/314 ,  G11B5/1278 ,  G11B2005/0024

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08174937B2

公开(公告)日：2012-05-08

申请号：US12550662

申请日：2009-08-31

Applicant: Hiroshi Ikeda ,  Kiyoshi Noguchi ,  Saori Kajihara ,  Isamu Sato

Inventor： Hiroshi Ikeda ,  Kiyoshi Noguchi ,  Saori Kajihara ,  Isamu Sato

IPC: G11B11/00

CPC classification number: G11B5/1278 ,  G11B2005/001 ,  G11B2005/0024

Abstract: 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.

Abstract translation: 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：US20110255197A1

公开(公告)日：2011-10-20

申请号：US12763577

申请日：2010-04-20

Applicant: Yoshihiro TSUCHIYA ,  Kiyoshi Noguchi ,  Migaku Takahashi ,  Masakiyo Tsunoda

Inventor： Yoshihiro TSUCHIYA ,  Kiyoshi Noguchi ,  Migaku Takahashi ,  Masakiyo Tsunoda

IPC: G11B5/127 ,  G11B5/48 ,  H02N99/00

CPC classification number: G11B5/6005 ,  G11B5/314 ,  G11B2005/0024

Abstract: A microwave oscillation element of the present invention includes a lamination main part in which an oscillating layer that is a magnetization free layer and that generates a high frequency electromagnetic field by an excitation of a spin wave, a nonmagnetic intermediate layer, a polarizer layer, and a reference layer that is to be a base magnetic layer of a spin transfer due to application of current are layered in this order. The oscillating layer is made of CoIr, the polarizer layer is configured of CoCr or CoRu; and the nonmagnetic intermediate layer is configured of Cr or Ru. As a result, the efficiency of the spin injection is improved and the microwave oscillation element where the oscillation efficiency is excellent can be realized.

Abstract translation: 本发明的微波振荡元件包括层叠主体部，其中，作为磁化自由层的振动层，通过自旋波的激发产生高频电磁场，非磁性中间层，偏振片层和 将由于施加电流而成为自旋转移的基础磁性层的参考层按此顺序分层。 振荡层由CoIr制成，偏振层由CoCr或CoRu构成; 非磁性中间层由Cr或Ru构成。 结果，提高了自旋注入的效率，并且可以实现振荡效率优异的微波振荡元件。

公开(公告)号：US08031426B2

公开(公告)日：2011-10-04

申请号：US12700278

申请日：2010-02-04

Applicant: Hiroshi Ikeda ,  Sayaka Hattori ,  Kiyoshi Noguchi

Inventor： Hiroshi Ikeda ,  Sayaka Hattori ,  Kiyoshi Noguchi

IPC: G11B5/02 ,  G11B5/127

CPC classification number: G11B5/314 ,  G11B2005/001 ,  G11B2005/0024

Abstract: A thin-film magnetic head having microwave magnetic exciting function, includes a write magnetic field production unit for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, a 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, and two conductors separated from the line conductor in a direction perpendicular to a track-width direction of the thin-film magnetic head and parallel to an ABS of the thin-film magnetic head. The microwave radiator is an inverted micro strip waveguide having the line conductor and a ground conductor constituted by the magnetic recording medium. A section of the line conductor, perpendicular to the track-width direction has a rectangular shape. An aspect ratio B/A is within a region from 0.15 to 1.2 or within a region of 7 or more, where A is a length in a lateral direction of the line conductor, which is in parallel with the ABS and perpendicular to the track-width direction, and B is a length in a longitudinal direction of the line conductor, which is perpendicular to the air bearing surface.

Abstract translation: 一种具有微波磁激励功能的薄膜磁头，包括写入磁场产生单元，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，微波辐射器的线路导体 平面结构类型，独立于写入磁场产生装置形成，用于通过微波激励电流向其馈送频率等于或接近铁磁谐振频率FR的频率的微波频带共振磁场 磁记录介质和两条导体，它们在垂直于薄膜磁头的磁道宽度方向的方向上与线路导体分离，并平行于薄膜磁头的ABS。 微波辐射器是具有线路导体和由磁记录介质构成的接地导体的倒置微带波导。 垂直于轨道宽度方向的线路导体的一部分具有矩形形状。 纵横比B / A在0.15至1.2的范围内或在7或更大的区域内，其中A是线路导体的横向方向上的长度，其与ABS平行并垂直于轨道 - 宽度方向，B是与空气轴承面垂直的线状导体的长度方向的长度。

公开(公告)号：US20090290267A1

公开(公告)日：2009-11-26

申请号：US12470150

申请日：2009-05-21

Applicant: Hiroshi Ikeda ,  Saori Kajihara ,  Kiyoshi Noguchi ,  Isamu Sato

Inventor： Hiroshi Ikeda ,  Saori Kajihara ,  Kiyoshi Noguchi ,  Isamu Sato

IPC: G11B5/33

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

Abstract: 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.

Abstract translation: 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：US20080316642A1

公开(公告)日：2008-12-25

申请号：US11763057

申请日：2007-06-14

Applicant: Atsushi YAMAGUCHI ,  Kiyoshi Noguchi ,  Shingo Miyata ,  Masashi Sano

Inventor： Atsushi YAMAGUCHI ,  Kiyoshi Noguchi ,  Shingo Miyata ,  Masashi Sano

IPC: G11B5/127

CPC classification number: G11B5/3116 ,  G11B5/1278

Abstract: The present invention relates to a perpendicular recording magnetic head. A main magnetic pole film of a perpendicular recording element is a plated film formed on an electrode film and having a small width portion and a large width portion. The small width portion is a portion for emitting a perpendicular magnetic field from a front end thereof, while the large width portion is portion being continuous with a rear end of the small width portion and having an increased width. The electrode film is different in film thickness between beneath a portion of the plated film forming at least the front end of the small width portion and beneath a portion of the plated film forming the large width portion.

Abstract translation: 本发明涉及一种垂直记录磁头。 垂直记录元件的主磁极膜是形成在电极膜上并具有小宽度部分和宽宽度部分的电镀膜。 小宽度部分是用于从其前端发射垂直磁场的部分，而大宽度部分是与小宽度部分的后端连续并且具有增加的宽度的部分。 所述电极膜的​​厚度不同，所述电镀膜的至少形成在所述小宽度部的前端部的部分之下，并且形成所述大宽度部的所述镀膜的部分之下。

公开(公告)号：US20080274379A1

公开(公告)日：2008-11-06

申请号：US11742788

申请日：2007-05-01

Applicant: Shingo Miyata ,  Atsushi Yamaguchi ,  Kiyoshi Noguchi ,  Makoto Sato

Inventor： Shingo Miyata ,  Atsushi Yamaguchi ,  Kiyoshi Noguchi ,  Makoto Sato

IPC: G11B5/39 ,  G11B5/127 ,  G11B5/64

CPC classification number: G11B5/4853 ,  Y10T428/1121

Abstract: The present invention relates to a thin-film device including a thin-film element and a lead conductor film. The thin-film element and the lead conductor film are embedded in an insulating film. The lead conductor film has a terminal area at one end thereof, is connected to the thin-film element at the other end thereof, and between the one end and the other end, has an increased surface area portion whose volume is partially occupied by an insulating material to increase surface area. As a result, there is provided a high frequency thin-film device capable of reducing loss and heat generation due to skin effect, particularly a thin-film magnetic head.

Abstract translation: 本发明涉及包括薄膜元件和引线导体膜的薄膜器件。 薄膜元件和引线导体膜嵌入绝缘膜中。 引线导体膜的一端具有端子区域，在其另一端连接到薄膜元件，并且在一端与另一端之间具有增加的表面积部分，其体积部分地被 绝缘材料增加表面积。 结果，提供了能够减少由于皮肤效应引起的损失和发热的高频薄膜器件，特别是薄膜磁头。

公开(公告)号：US07440238B2

公开(公告)日：2008-10-21

申请号：US11410043

申请日：2006-04-25

Applicant: Kei Hirata ,  Kiyoshi Noguchi ,  Atsushi Yamaguchi

Inventor： Kei Hirata ,  Kiyoshi Noguchi ,  Atsushi Yamaguchi

IPC: G11B5/127

CPC classification number: G11B5/3163 ,  G11B5/3143 ,  Y10T29/49021 ,  Y10T29/49048

Abstract: The present invention provides a thin film magnetic head capable of satisfying both assurance of recording performance and assurance of reproduction performance. In the case where a lower magnetic layer is formed of an iron cobalt alloy (for example, Fe65Co35) which contains iron in a range of 60 at % to 80 at % and has extremely high saturation magnetic flux density of 2.4 T or higher, a head isolation layer formed of ruthenium (Ru) is provided between the lower magnetic layer and an upper read shield layer portion. As compared with the case where the head isolation layer is not provided between the lower magnetic layer and the upper read shield layer portion, the strength of a recording magnetic field increases and a reproduction output of an MR element is stabilized.

Abstract translation: 本发明提供了能够满足记录性能的保证和再现性能的保证的薄膜磁头。 在下面的磁性层由铁含量在60％至80％范围内的铁钴合金（例如，Fe 65 N 3+ 35）形成的情况下 at％，并且具有2.4T以上的极高饱和磁通密度，在下磁性层和上部读屏蔽层部分之间设置由钌（Ru）形成的磁头隔离层。 与在下部磁性层和上部读取屏蔽层部分之间没有设置磁头隔离层的情况相比，记录磁场的强度增加，MR元件的再现输出稳定。

公开(公告)号：US07359146B2

公开(公告)日：2008-04-15

申请号：US10891182

申请日：2004-07-15

Applicant: Kei Hirata ,  Kiyoshi Noguchi ,  Tetsuya Mino ,  Tetsuya Roppongi

Inventor： Kei Hirata ,  Kiyoshi Noguchi ,  Tetsuya Mino ,  Tetsuya Roppongi

IPC: G11B5/127

CPC classification number: G11B5/127

Abstract: The soft magnetic film takes its hard axis along the direction in which a magnetic field is generated and its easy axis along a direction perpendicular to the direction of the writer magnetic field. The magnetic bias film applies a magnetic bias along the easy axis to the soft magnetic film.

Abstract translation: 软磁性膜沿其沿着写入磁场方向垂直的方向沿其产生磁场的方向和其容易的轴取其硬轴。 磁偏置膜沿着容易的轴向磁性膜施加磁偏置。

公开(公告)号：US07321480B2

公开(公告)日：2008-01-22

申请号：US10917476

申请日：2004-08-13

Applicant: Taro Oike ,  Kiyoshi Noguchi ,  Shin Narushima ,  Takamitsu Sakamoto ,  Hiraku Hirabayashi

Inventor： Taro Oike ,  Kiyoshi Noguchi ,  Shin Narushima ,  Takamitsu Sakamoto ,  Hiraku Hirabayashi

IPC: G11B5/39

CPC classification number: G11B5/3163 ,  G11B5/3116 ,  Y10T29/49021

Abstract: A thin-film magnetic head includes a lower magnetic layer, an upper magnetic layer, a recording gap layer, and a thin-film coil. The lower magnetic layer has a first magnetic pole tip layer, and a first yoke layer which is connected to the first magnetic pole tip layer. The first yoke layer has an extended part which is relatively thick and a reduced part which is relatively thin in the area in which the first yoke layer confronts the first magnetic pole tip layer, the extended part being positioned on the side of the air bearing surface. Further, the first magnetic pole tip layer is connected to the first yoke layer at the extended part, and is insulated from the first yoke layer at the reduced part.

Abstract translation: 薄膜磁头包括下磁性层，上磁性层，记录间隙层和薄膜线圈。 下磁性层具有第一磁极尖端层和与第一磁极尖端层连接的第一磁轭层。 第一磁轭层具有相对较厚的延伸部分和在第一磁轭层面对第一磁极末端层的区域中较薄的部分，延伸部分位于空气轴承表面侧 。 此外，第一磁极尖端层在延伸部分处连接到第一磁轭层，并且在缩小部分处与第一磁轭层绝缘。