公开(公告)号：US4713710A

公开(公告)日：1987-12-15

申请号：US833396

申请日：1986-02-25

申请人： Yutaka Soda ,  Hideko Imamura ,  Hiroyuki Uchida ,  Tetsuo Sekiya

发明人： Yutaka Soda ,  Hideko Imamura ,  Hiroyuki Uchida ,  Tetsuo Sekiya

IPC分类号： G11B5/105 ,  G11B5/10 ,  G11B5/115 ,  G11B5/187 ,  G11B5/23 ,  G11B5/265 ,  G11B5/31 ,  G11B5/39

CPC分类号： G11B5/2651 ,  G11B5/10 ,  G11B5/115 ,  G11B5/1871 ,  G11B5/3103

摘要： The present invention is to construct a combination magnetic head apparatus in which thin film type magnetic head element portions, circuits and circuit parts accompanying therewith are mounted on first and second magnetic shield plates to thereby construct a recording head and a reproducing head and both the magnetic shield plates are bonded together at the back surfaces thereof with the result that the apparatus can be made small in size, the assembling thereof can be simplified and the accuracy thereof can be improved.

摘要翻译： PCT No.PCT / JP85 / 00351 Sec。 371日期1986年2月25日 102（e）日期1986年2月25日PCT提交1985年6月21日PCT公布。 公开号WO86 / 00456 日本1986年1月16日。本发明是构成一种组合磁头装置，其中薄膜型磁头元件部分，电路和伴随其的电路部件安装在第一和第二磁屏蔽板上，从而构成记录头， 再现头和两个磁屏蔽板在其后表面处结合在一起，结果可以使该装置的尺寸变小，从而可以简化其组装并提高其精度。

公开(公告)号：US4679107A

公开(公告)日：1987-07-07

申请号：US643398

申请日：1984-08-23

申请人： Shigeyoshi Imakoshi ,  Yutaka Soda ,  Hideo Suyama ,  Yasuhiro Iida

发明人： Shigeyoshi Imakoshi ,  Yutaka Soda ,  Hideo Suyama ,  Yasuhiro Iida

IPC分类号： G11B5/02 ,  G11B5/39 ,  G11B5/465 ,  G11B5/127 ,  G11B5/33

CPC分类号： G11B5/3903 ,  G11B5/3925 ,  G11B5/465

摘要： A magnetic head utilizing the magnetoresistance effect comprising a magnetoresistance effect element and a conductor for applying a bias magnetic field to the element by being supplied with a bias current. The conductor is further supplied with a decaying alternating current superimposed on the bias current in advance of the playback operation, so that the hysteresis effect of the magnetic circuit is cancelled and the invariable output characteristics of the magnetic head are obtained.

摘要翻译： 利用磁阻效应的磁头包括磁阻效应元件和用于通过提供偏置电流向元件施加偏置磁场的导体。 在再现操作之前，导体还被提供叠加在偏置电流上的衰减交流电，从而消除磁路的滞后效应并获得磁头的不变输出特性。

公开(公告)号：US4673999A

公开(公告)日：1987-06-16

申请号：US643544

申请日：1984-08-23

申请人： Hideo Suyama ,  Shigeyoshi Imakoshi ,  Yutaka Soda ,  Takeyuki Fuse ,  Iwao Abe ,  Noboru Wakabayashi

发明人： Hideo Suyama ,  Shigeyoshi Imakoshi ,  Yutaka Soda ,  Takeyuki Fuse ,  Iwao Abe ,  Noboru Wakabayashi

IPC分类号： G11B5/23 ,  G11B5/31 ,  G11B5/39 ,  G11B5/127 ,  G11B5/29

CPC分类号： G11B5/3903 ,  G11B5/3133 ,  G11B5/3163

摘要： A multi channel magnetic transducer head comprises a magnetic substrate, and a plurality of thin film type magnetic transducer head elements arranged on the magnetic substrate, each magnetic transducer head element including a coil conductor disposed on the magnetic substrate and a thin film magnetic core to constitute a magnetic circuit in co-operation with the substrate, wherein a non-magnetic gap spacer layer with a predetermined thickness is formed at track width portion below front end of the thin film magnetic core on the magnetic core, a non-magnetic layer with thickness larger than that of the gap spacer layer is formed at track spacing portion, the thin film magnetic core has width covering at least the gap spacer layer of the track width portion, thereby good magnetic recording can be performed.

摘要翻译： 多通道磁换能器头包括磁性基板和布置在磁性基板上的多个薄膜型磁换能器头元件，每个磁换能器头元件包括设置在磁性基板上的线圈导体和构成 与基板配合的磁路，其特征在于，在磁芯上的薄膜磁芯前端的磁道宽度部分形成具有预定厚度的非磁隙间隔层，具有厚度的非磁性层 大于在间隔部分形成的间隔层的间隔层，薄膜磁芯至少具有覆盖轨道宽度部分的间隔层的宽度，从而可以进行良好的磁记录。

公开(公告)号：US06970332B2

公开(公告)日：2005-11-29

申请号：US10627839

申请日：2003-07-25

申请人： Hiroki Tetsukawa ,  Yutaka Soda ,  Akihiko Okabe

发明人： Hiroki Tetsukawa ,  Yutaka Soda ,  Akihiko Okabe

IPC分类号： G11B5/008 ,  G11B5/255 ,  G11B5/31 ,  G11B5/39 ,  G11B5/40 ,  G11B5/48 ,  G11B5/53 ,  H01F10/16 ,  H01F10/30 ,  H01F10/32 ,  H01L43/08 ,  H01L43/10

CPC分类号： B82Y10/00 ,  G11B5/0086 ,  G11B5/255 ,  G11B5/3106 ,  G11B5/3903 ,  G11B5/40 ,  G11B5/4893 ,  G11B5/53

摘要： An improvement in the corrosion resistance of a magnetoresistive head is aimed for, and a high magnetoresistivity ratio is maintained. In a magnetoresistive head equipped with, as a magnetic sensor element for detecting magnetic signals while in contact with a magnetic recording medium, a spin-valve film, which has a structure where an anti-ferromagnetic layer, a pinned layer in which the direction of magnetization is pinned in a predetermined direction by an exchange-coupling magnetic field at work between itself and the anti-ferromagnetic layer, a free layer in which the direction of magnetization changes in accordance with an external magnetic field, and a non-magnetic layer for magnetically isolating the pinned layer and the free layer are layered, the corrosion potential of the spin-valve film relative to a standard hydrogen electrode measured while immersed in a NaCl solution of a concentration of 0.1 mol/L is specified at +0.4 [V vs. SHE] or above.

摘要翻译： 旨在提高磁阻磁头的耐腐蚀性，并保持高的磁阻率。 在具有用于在与磁记录介质接触时检测磁信号的磁传感器元件的磁阻头中，具有反铁磁层的结构的自旋阀膜，其中， 通过在其自身和反铁磁层之间的工作时的交换耦合磁场，磁化方向根据外部磁场而变化的自由层，以及非磁性层，将磁化固定在预定方向上 磁性隔离被钉扎层和自由层被层叠，当浸渍在浓度为0.1mol / L的NaCl溶液中时，自旋阀膜相对于标准氢电极的腐蚀电位在+0.4 [V vs SHE]以上。

公开(公告)号：US5535077A

公开(公告)日：1996-07-09

申请号：US356533

申请日：1994-12-15

申请人： Norio Saito ,  Yutaka Soda

发明人： Norio Saito ,  Yutaka Soda

IPC分类号： G11B5/39

CPC分类号： G11B5/3929 ,  G11B5/3945

摘要： A magnetoresistive effect magnetic head having a film comprising laminated first and second magnetoresistive elements with an electrically conductive intermediate film therebetween, and a pair of shield members positioned on both sides of the laminated film. Even if a magnetic gap of the head is reduced in length, the magnetic equilibrium of the first and second magneto-resistive elements may be stabilized by allowing over 10% of the current through the film to go through the intermediate film, thereby enabling a high playback output to be produced when reproducing signals on a magnetic medium.

摘要翻译： 一种具有膜的磁阻效应磁头，包括层压的第一和第二磁阻元件，其间具有导电中间膜，以及位于层压膜两侧的一对屏蔽构件。 即使头部的磁隙长度减小，也可以通过使超过10％的电流通过中间膜来稳定第一和第二磁阻元件的磁平衡，从而使高 在磁介质上再现信号时将产生播放输出。

公开(公告)号：US4695908A

公开(公告)日：1987-09-22

申请号：US643542

申请日：1984-08-23

申请人： Shigeyoshi Imakoshi ,  Yutaka Soda ,  Hideo Suyama

发明人： Shigeyoshi Imakoshi ,  Yutaka Soda ,  Hideo Suyama

IPC分类号： G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/23

CPC分类号： G11B5/3903 ,  G11B5/09 ,  G11B5/3116

摘要： A thin film type magnetic transducer head comprises a magnetic substrate, and a thin film magnetic core formed on the substrate through an effective magnetic gap at one end of the substrate to be faced to a magnetic recording medium, the magnetic substrate and the thin film magnetic core forming a magnetic circuit to reproduce signals on the magnetic medium, wherein a length between a center of the magnetic gap and an edge of the magnetic core and wave length satisfy definite relations, thereby the S/N ratio and the output are improved in the digital magnetic recording.

摘要翻译： 薄膜型磁换能器头包括磁性基板和薄膜磁芯，该薄膜磁芯通过基板一端的有效磁隙形成在基板上，以面向磁记录介质，磁性基板和薄膜磁性 磁芯形成磁路以在磁介质上再现信号，其中磁隙的中心与磁芯的边缘和波长之间的长度满足确定的关系，从而S / N比和输出在 数字磁记录。