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。

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。

公开(公告)号：US07123451B2

公开(公告)日：2006-10-17

申请号：US10668998

申请日：2003-09-24

申请人： Rachid Sbiaa ,  Mikio Matsuzaki ,  Haruyuki Morita

发明人： Rachid Sbiaa ,  Mikio Matsuzaki ,  Haruyuki Morita

IPC分类号： G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3909 ,  G11B2005/3996 ,  Y10T29/49032

摘要： The thin-film magnetic head of the present invention is provided with an antiferromagnetic layer, a pinned layer whose direction of magnetization is fixed by exchange-coupling with the antiferromagnetic layer, a free layer whose direction of magnetization varies according to external magnetic field, an intermediate layer disposed between the pinned layer and free layer, and a pair of electrode layers for supplying a sense current in a layer thickness direction of the free layer. One electrode layer is connected to the pinned layer. Due to this configuration, a sense current flows through the free layer, the intermediate layer, and the pinned layer, but basically does not flow through the antiferromagnetic layer. As a consequence, the antiferromagnetic layer does not contribute to total resistance of the magnetoresistance element, allowing a high magnetoresistance ratio to be obtained.

摘要翻译： 本发明的薄膜磁头设置有反铁磁层，通过与反铁磁层交换耦合来固定磁化方向的钉扎层，磁化方向根据外部磁场而变化的自由层， 设置在被钉扎层和自由层之间的中间层，以及用于在自由层的层厚度方向上提供感测电流的一对电极层。 一个电极层连接到固定层。 由于这种结构，检测电流流过自由层，中间层和被钉扎层，但基本上不流过反铁磁性层。 因此，反铁磁性层对磁电阻元件的总电阻无贡献，可以获得高的磁阻比。

公开(公告)号：US06639754B2

公开(公告)日：2003-10-28

申请号：US09951380

申请日：2001-09-14

申请人： Tomoko Taguchi ,  Tetsuya Roppongi ,  Shinichi Horinouchi ,  Haruyuki Morita ,  Mikio Matsuzaki

发明人： Tomoko Taguchi ,  Tetsuya Roppongi ,  Shinichi Horinouchi ,  Haruyuki Morita ,  Mikio Matsuzaki

IPC分类号： G11B5127

CPC分类号： G11B5/1278 ,  G11B5/012 ,  G11B2005/0029

摘要： A perpendicular magnetic recording apparatus includes a magnetic disk having a perpendicular double-layer film and a perpendicular magnetic recording head having a leading pole positioned forward along the head traveling direction, a trailing pole positioned backward along the head traveling direction at a gap length from the leading pole and having, in an air-bearing surface, a forward pole and a rearward pole of which saturation magnetic flux density is higher than that of the forward pole, and an exciting coil. A length p of the trailing pole along the head traveling direction is longer than a length T of the trailing pole in a track width direction, the length p is longer than the gap length g1, and a length p1 of the rearward pole is shorter than a length p2 of the forward pole along the head traveling direction.

摘要翻译： 垂直磁记录装置包括具有垂直双层膜的磁盘和具有沿磁头行进方向向前定位的前导磁极的垂直磁记录头，沿着磁头行进方向向后延伸的后退磁极， 在空气轴承表面上具有饱和磁通密度高于正极的正极和后极以及励磁线圈。 沿着磁头行进方向的尾磁极的长度p比轨道宽度方向上的尾磁极的长度T长，长度p比间隙长度g1长，并且后极的长度p1比 沿着磁头行进方向的前极的长度p2。

公开(公告)号：US5236735A

公开(公告)日：1993-08-17

申请号：US715012

申请日：1991-06-13

申请人： Makoto Yoshida ,  Yuzuru Iwai ,  Noboru Yamanaka ,  Jun Shouzi ,  Tsutomu Koyanagi ,  Mikio Matsuzaki ,  Nobuya Ohyama ,  Yoshiaki Tanaka

发明人： Makoto Yoshida ,  Yuzuru Iwai ,  Noboru Yamanaka ,  Jun Shouzi ,  Tsutomu Koyanagi ,  Mikio Matsuzaki ,  Nobuya Ohyama ,  Yoshiaki Tanaka

IPC分类号： G11B5/31

CPC分类号： G11B5/3106 ,  G11B5/3113 ,  G11B5/3163

摘要： A method of producing a thin film magnetic head comprises forming a thin film magnetic circuit including a magnetic film and a conductive coil film on a substrate, and heating the thin film magnetic circuit at a temperature in a range of from 270.degree. C. to 400.degree. C. before forming a protective layer covering the thin film magnetic circuit.

摘要翻译： 一种制造薄膜磁头的方法包括在基板上形成包括磁性膜和导电线圈膜的薄膜磁路，并在270℃至400℃的温度范围内加热薄膜磁路 在形成覆盖薄膜磁路的保护层之前。

公开(公告)号：US5200869A

公开(公告)日：1993-04-06

申请号：US658872

申请日：1991-02-22

申请人： Mikio Matsuzaki

发明人： Mikio Matsuzaki

IPC分类号： G11B5/31 ,  G11B5/60 ,  G11B21/21

CPC分类号： G11B5/6005 ,  G11B5/3106

摘要： A thin film magnetic head has a slider and a thin film magnetic transducing element attached to an end surface of the slider, wherein the thin film magnetic transducing element is provided with bonding pads electrically connected to a conductor coil, and the bonding pads are extended to the surface opposite the surface of the slider which faces a magnetic recording medium.

摘要翻译： 薄膜磁头具有附接到滑块的端面的滑块和薄膜磁转换元件，其中薄膜磁转换元件设置有电连接到导体线圈的接合焊盘，并且将焊盘延伸到 与滑块的面向磁记录介质的表面相对的表面。

公开(公告)号：US5134531A

公开(公告)日：1992-07-28

申请号：US534235

申请日：1990-06-07

申请人： Mikio Matsuzaki ,  Shunichi Katase

发明人： Mikio Matsuzaki ,  Shunichi Katase

IPC分类号： G11B5/187 ,  G11B5/31 ,  G11B5/60 ,  G11B21/21

CPC分类号： G11B5/3103 ,  G11B5/1871 ,  G11B5/6005

摘要： A magnetic head includes a slider provided with at least one reading/writing element wherein the slider has a pair of rail portions projecting with a space therebetween from the surface opposing a magnetic recording medium so as to extend in the direction of air discharge. The slider surface between the pair of rail portions includes first and second grooves formed inside and along rail portions and a flat portion formed between the first and second grooves, wherein the depth .alpha. from the surface of one of the rail portions to the flat portion and the depth .beta. from the flat portion to the bottom of the first or second groove satisfy a relation of .alpha.>.beta..

摘要翻译： 磁头包括设置有至少一个读/写元件的滑块，其中滑块具有从与磁记录介质相对的表面之间的空间突出的一对轨道部分，以沿着空气排放的方向延伸。 一对轨道部分之间的滑块表面包括形成在轨道部分内部和沿着轨道部分的第一和第二槽，以及形成在第一和第二槽之间的平坦部分，其中从轨道部分之一到平坦部分的表面的深度α和 从第一或第二凹槽的平坦部分到底部的深度β满足α>β的关系。

公开(公告)号：US5006946A

公开(公告)日：1991-04-09

申请号：US340533

申请日：1989-04-19

申请人： Mikio Matsuzaki

发明人： Mikio Matsuzaki

IPC分类号： G11B5/48

CPC分类号： G11B5/4853 ,  G11B5/486

摘要： A magnetic head supporting device which includes a supporter having a resilient spring portion and a rigid beam portion contiguous to the resilient spring portion a flexible member whose one end is attached to the supporter at a portion near its free end; a loading projection provided in the upper surface of the flexible member or in the lower surface of the supporter at a portion near its free end to thereby transmit a loading force from the free end of the supporter to the flexible member; and a magnetic head having a slider attached with reading/writing elements, the magnetic head being fixed to the lower surface of the flexible member, wherein the flexible member is composed of a plate of a polymeric resinous material having conductors for wiring; the conductors are electrically connected to electrodes for the reading/writing elements of the magnetic head, and the plate of a polymeric resinous material is extended on the supporter in its longitudinal direction.

摘要翻译： 一种磁头支撑装置，其包括具有弹性弹簧部分的支撑件和与弹性弹簧部分相邻的刚性梁部分，柔性构件的一端在靠近其自由端的部分附接到支撑件; 设置在所述柔性构件的上表面中或所述支撑件的下表面中的靠近其自由端的部分的载荷突起，从而将载荷力从所述支撑件的自由端传递到所述柔性构件; 以及磁头，其具有附接有读/写元件的滑块，所述磁头固定到所述柔性构件的下表面，其中所述柔性构件由具有用于布线的导体的聚合树脂材料的板构成; 导体电连接到用于磁头读/写元件的电极，并且聚合物树脂材料的板在支撑件上沿其纵向方向延伸。

公开(公告)号：US5001583A

公开(公告)日：1991-03-19

申请号：US340532

申请日：1989-04-19

申请人： Mikio Matsuzaki

发明人： Mikio Matsuzaki

IPC分类号： G11B5/48

CPC分类号： G11B5/4853 ,  G11B5/4886

摘要： A magnetic head supporting device which includes a supporter having a resilient spring portion and a rigid beam portion contiguous to the resilient spring portion a flexible member whose one end is attached to the supporter at a portion near its free end; a loading projection provided in the upper surface of the flexible member or in the lower surface of the supporter at a portion near its free end to thereby transmit a loading force from the free end of the supporter to the flexible member; and a magnetic head having a slider attached with reading/writing elements, the magnetic head being fixed to the lower surface of the flexible member, wherein the flexible member is composed of a plate of a polymeric resinous material having conductors for wiring, and the conductors are electrically connected to electrodes for the reading/writing elements of the magnetic head.

摘要翻译： 一种磁头支撑装置，其包括具有弹性弹簧部分的支撑件和与弹性弹簧部分相邻的刚性梁部分，柔性构件的一端在靠近其自由端的部分附接到支撑件; 设置在所述柔性构件的上表面中或所述支撑件的下表面中的靠近其自由端的部分的载荷突起，从而将载荷力从所述支撑件的自由端传递到所述柔性构件; 以及磁头，其具有附接有读/写元件的滑块，所述磁头固定到所述柔性构件的下表面，其中所述柔性构件由具有用于布线的导体的聚合树脂材料的板组成，并且所述导体 电连接到用于磁头的读/写元件的电极。

公开(公告)号：US4349247A

公开(公告)日：1982-09-14

申请号：US173907

申请日：1980-07-30

申请人： Yukio Koyama ,  Tsutomu Kondo ,  Mikio Matsuzaki ,  Kunio Akizuki

发明人： Yukio Koyama ,  Tsutomu Kondo ,  Mikio Matsuzaki ,  Kunio Akizuki

IPC分类号： B60R1/00 ,  B60R1/08

CPC分类号： B60R1/002

摘要： A mirror apparatus for automobile including an objective mirror region having an objective mirror and an ocular mirror region having a planar ocular mirror, wherein: the objective mirror is provided outside the automobile body to face an area of ground surface centering around the vicinity of the corner of the automobile body located opposite to the driver's seat, and the ocular mirror is disposed in a space within the ocular mirror region which has a first aperture for receiving therethrough an image reflected by the objective mirror and a second aperture for transmitting therethrough an image reflected by the ocular mirror to the driver's eyes. The first aperture has a limited size necessary for receiving the image on the objective mirror region reflected on the ocular mirror. Thus, this mirror apparatus enables the driver to have a good view of the blind area which otherwise would develop on that site located opposite to the driver's seat, and also is able to block the entry of unnecessary light to the mirrors.

摘要翻译： 一种用于汽车的镜子装置，包括具有物镜的物镜区域和具有平面镜面的眼镜区域，其中：物镜设置在汽车车身的外侧，以面对围绕角附近的地面区域 并且所述目镜被设置在所述眼镜区域内的空间中，所述空间镜具有用于接收由所述物镜反射的图像的第一孔和用于透过所述物镜反射的图像的第二孔 通过眼镜到司机的眼睛。 第一孔具有在镜面上反射的物镜区域上接收图像所需的有限尺寸。 因此，这种镜子装置使得驾驶员能够对位于与驾驶员座椅相对的位置处发展的盲区具有良好的视野，并且还能够阻挡不必要的光进入反射镜。