公开(公告)号：US5225951A

公开(公告)日：1993-07-06

申请号：US869056

申请日：1992-04-16

申请人： Tohru Kira ,  Kozi Otsuka ,  Kazuyoshi Imae ,  Mitsuhiko Yoshikawa ,  Kengo Shiiba

发明人： Tohru Kira ,  Kozi Otsuka ,  Kazuyoshi Imae ,  Mitsuhiko Yoshikawa ,  Kengo Shiiba

IPC分类号： G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3925 ,  G11B5/3113

摘要： A thin film magnetic head includes yokes for leading magnetic flux of signals generated from a magnetic recording medium up to a magnetic resistance effect element. The yokes are made of sputtered films having internal compressive stress therein. The internal stress in the yokes which are deleterious to the magnetic properties of the magnetic resistance effect element can be negated or reduced by including a film of material on the yokes for compensating for the internal stresses.

摘要翻译： 薄膜磁头包括用于引导从磁记录介质产生的信号的磁通直到磁阻效应元件的轭。 轭体由其中具有内部压应力的溅射膜制成。 对磁阻效应元件的磁特性有害的磁轭中的内部应力可以通过在磁轭上包含材料膜来补偿内部应力而被否定或减少。

公开(公告)号：US5155644A

公开(公告)日：1992-10-13

申请号：US688701

申请日：1991-04-22

申请人： Tohru Kira ,  Kozi Otsuka ,  Kazuyoshi Imae ,  Mitsuhiko Yoshikawa ,  Kengo Shiiba

发明人： Tohru Kira ,  Kozi Otsuka ,  Kazuyoshi Imae ,  Mitsuhiko Yoshikawa ,  Kengo Shiiba

IPC分类号： G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3925 ,  G11B5/3113

摘要： The yoke thin film magnetic head according to the present invention includes yokes for leading the magnetic flux of signals generated from the magnetic recording medium up to the magnetic resistance effect element, which yokes are made of sputtered films having compressive stress therein. Therefore, the internal stress in the yokes which cause bad influences upon magnetic properties of the magnetic resistance effect element can be negated or reduced, with less Barkhausen noises produced.

摘要翻译： 根据本发明的磁轭薄膜磁头包括用于引导从磁记录介质产生的信号的磁通直到磁阻效应元件的磁轭，该磁轭由其中具有压应力的溅射膜制成。 因此，由于产生了较少的巴克豪森噪声，因此，可以否定或减少对磁阻效应元件的磁特性造成不良影响的磁轭中的内部应力。

公开(公告)号：US4789910A

公开(公告)日：1988-12-06

申请号：US855934

申请日：1986-04-25

申请人： Kozi Otsuka ,  Tohru Kira ,  Kazuyoshi Imae ,  Mitsuhiko Yoshikawa

发明人： Kozi Otsuka ,  Tohru Kira ,  Kazuyoshi Imae ,  Mitsuhiko Yoshikawa

IPC分类号： G11B5/39 ,  G11B5/30 ,  G11B5/12

CPC分类号： G11B5/3903

摘要： A thin film magnetic head which comprises an end portion of a first yoke and an end portion of a second yoke confronting each other through a magnetic gap, and receiving from a recording surface or a recording medium, a magnetic signal, and a magnetic reluctance effect element disposed for magnetic coupling in the course of a magnetic path constituted by the first and second yokes. The thin film magnetic head is characterized in that the first yoke or magnetic reluctance effect element is formed on an application type SiO.sub.2 film which improves the surface roughness of the ground layer.

摘要翻译： 一种薄膜磁头，其包括第一磁轭的端部和通过磁隙相互面对的第二磁轭的端部，以及从记录表面或记录介质接收磁信号和磁阻效应 在由第一和第二轭构成的磁路的过程中设置用于磁耦合的元件。 薄膜磁头的特征在于，第一磁轭或磁阻效应元件形成在施加型SiO 2膜上，改善了接地层的表面粗糙度。

公开(公告)号：US4966648A

公开(公告)日：1990-10-30

申请号：US370181

申请日：1989-06-23

申请人： Tsuneo Nakamura ,  Kazuyoshi Imae ,  Haruhiko Deguchi ,  Tohru Kira

发明人： Tsuneo Nakamura ,  Kazuyoshi Imae ,  Haruhiko Deguchi ,  Tohru Kira

IPC分类号： G11B5/31 ,  H01F41/34

CPC分类号： H01F41/34 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49064

摘要： An improved process for producing a thin film magnetic head includes forming a nonmagnetic material layer over a lower magnetic core layer with an electrically conductive coil layer embedded in the nonmagnetic material layer. It further includes forming an upper magnetic core layer of a predetermined pattern by a specific method over the resultant to provide the thin film magnetic head.

公开(公告)号：US4702794A

公开(公告)日：1987-10-27

申请号：US824199

申请日：1986-01-30

申请人： Tsuneo Nakamura ,  Hidenori Yamasaki ,  Tohru Kira ,  Mitsuhiko Yoshikawa

发明人： Tsuneo Nakamura ,  Hidenori Yamasaki ,  Tohru Kira ,  Mitsuhiko Yoshikawa

IPC分类号： G11B5/31 ,  H01F41/34 ,  B44C1/22

CPC分类号： G11B5/3163 ,  H01F41/34

摘要： There is disclosed a process for modifying in an oxygen plasma an inert reaction product produced on a Fe-Al-Si alloy back core during a production of a thin film magnetic head utilizing a reactive ion etching (RIE) process. As a result of modifying the reaction product it is made readily soluble in and thus removable by water.

摘要翻译： 公开了在利用反应离子蚀刻（RIE）工艺制造薄膜磁头期间，在氧等离子体中改变在Fe-Al-Si合金背芯上产生的惰性反应产物的方法。 作为改变反应产物的结果，其易于溶解并因此被水除去。

公开(公告)号：US4677036A

公开(公告)日：1987-06-30

申请号：US823941

申请日：1986-01-29

申请人： Tsuneo Nakamura ,  Hidenori Yamasaki ,  Tohru Kira ,  Mitsuhiko Yoshikawa

发明人： Tsuneo Nakamura ,  Hidenori Yamasaki ,  Tohru Kira ,  Mitsuhiko Yoshikawa

IPC分类号： G11B5/31 ,  H01F41/32 ,  G11B5/66

CPC分类号： H01F41/32 ,  G11B5/3163 ,  Y10S428/90 ,  Y10T29/49044 ,  Y10T29/49062 ,  Y10T29/49064 ,  Y10T428/1171 ,  Y10T428/31678

摘要： There provides a process for preparing a coil type thin film magnetic head having high density record by planarization differences in level caused by an electroconductive coil holded between upper and lower magnetic cores.

摘要翻译： 提供了一种用于制备具有高密度记录的线圈型薄膜磁头的方法，所述线圈型薄膜磁头由保持在上下磁芯之间的导电线圈引起的平坦化水平差。

公开(公告)号：US5995337A

公开(公告)日：1999-11-30

申请号：US221999

申请日：1994-04-04

申请人： Tohru Kira

发明人： Tohru Kira

IPC分类号： G11B5/008 ,  G11B5/39

CPC分类号： G11B5/3925 ,  G11B5/3903 ,  G11B5/3967 ,  G11B5/397 ,  G11B5/00813

摘要： A combined thin film magnetic head includes a first yoke magnetic head and a second type MR head a front gap is provided at a front end of the first yoke type MR head, and a second yoke type MR head is provided behind the first yoke type MR head. Consequently, the first yoke type MR head and the second yoke type MR head can be formed on the same substrate through the same process steps, and the number of manufacturing steps can be significantly reduced.

摘要翻译： 组合的薄膜磁头包括第一磁轭磁头和第二型MR磁头，前间隙设置在第一磁轭型MR磁头的前端，第二磁轭型MR磁头设置在第一磁轭型MR后面 头。 因此，可以通过相同的工艺步骤在同一基板上形成第一磁轭型MR磁头和第二磁轭型MR磁头，并且可以显着减少制造步骤的数量。

公开(公告)号：US5402292A

公开(公告)日：1995-03-28

申请号：US951985

申请日：1992-09-25

申请人： Tomohisa Komoda ,  Ryoji Minakata ,  Tohru Kira ,  Akiyoshi Fujii ,  Hiroshi Suzuki ,  Atsuo Mukai

发明人： Tomohisa Komoda ,  Ryoji Minakata ,  Tohru Kira ,  Akiyoshi Fujii ,  Hiroshi Suzuki ,  Atsuo Mukai

IPC分类号： G11B5/39 ,  G11B5/187 ,  G11B5/31

CPC分类号： G11B5/3925 ,  G11B5/3903 ,  G11B5/3932

摘要： A magnetoresistance effect type thin film magnetic head includes a MR element having the electrical resistance changed according to a change in an applied signal magnetic field, a lead electrode for detecting a voltage change generated across the ends of the MR element in which a change in electrical resistance is generated, and high coercive force films for applying a weak magnetic field to the MR element. The high coercive force films are arranged in the proximity of the ends of the MR element and at a predetermined position between the ends. According to this structure, a weak magnetic field is applied in uniform over the entire MR element to facilitate unification of magnetic domain of the MR element even in the case of a long MR element. Therefore, unification of magnetic domain can easily be carried out over the entire region of the MR element without increasing the film thickness of the high coercive force film even in a case of a wide track width, resulting in a thin film magnetic head with no Barkhausen noise generation.

摘要翻译： 磁阻效应型薄膜磁头包括具有根据施加的信号磁场的变化而改变的电阻的MR元件，用于检测在MR元件的两端产生的电压变化的引线电极，其中电变化 产生电阻，以及用于向MR元件施加弱磁场的高矫顽力膜。 高矫顽力膜布置在MR元件的端部附近并且在端部之间的预定位置处。 根据该结构，在整个MR元件上施加均匀的弱磁场，以便即使在长MR元件的情况下也能使MR元件的磁畴的统一化。 因此，即使在宽磁道宽度的情况下，也可以在MR元件的整个区域上容易地进行磁畴的统一，而不会增加高矫顽力膜的膜厚，导致没有Barkhausen的薄膜磁头 噪音发生。

公开(公告)号：US5862021A

公开(公告)日：1999-01-19

申请号：US874790

申请日：1997-06-13

申请人： Haruhiko Deguchi ,  Takaya Nakabayashi ,  Tomohisa Komoda ,  Tohru Kira ,  Noboru Fujita ,  Kazuhiro Uneyama

发明人： Haruhiko Deguchi ,  Takaya Nakabayashi ,  Tomohisa Komoda ,  Tohru Kira ,  Noboru Fujita ,  Kazuhiro Uneyama

IPC分类号： G11B5/39 ,  H01F10/32 ,  H01L43/08

CPC分类号： B82Y25/00 ,  G11B5/3906 ,  H01F10/3268 ,  H01L43/08

摘要： A magnetoresistive effect device is formed by layering a nonmagnetic Co oxide film, a pinned magnetization layer made of Co, a nonmagnetic layer made of Cu, a free magnetization layer made of NiFe in this order on a substrate made of glass or Si. By arranging the nonmagnetic Co oxide film in contact with the pinned magnetization layer, it is possible to produce a magnetoresistive effect device with a high saturation field and a high sensitivity.

摘要翻译： 通过在由玻璃或Si制成的衬底上依次层叠非磁性Co氧化膜，由Co制成的钉扎磁化层，由Cu制成的非磁性层，由NiFe制成的自由磁化层，形成磁阻效应器件。 通过使非磁性Co氧化膜与被钉扎的磁化层接触，可以制造出具有高饱和场和高灵敏度的磁阻效应器件。

公开(公告)号：US5153980A

公开(公告)日：1992-10-13

申请号：US736386

申请日：1991-07-26

申请人： Tohru Kira

发明人： Tohru Kira

IPC分类号： G11B5/265 ,  G11B5/29 ,  G11B5/31 ,  G11B5/48

CPC分类号： G11B5/4893 ,  G11B5/3103 ,  G11B5/3106 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A thin film magnetic head includes first and second head chips, each of the head chips having a substrate, a reproducing head portion provided in a side edge portion on the substrate, and a protecting plate convering the reproducing head portion and the recording head portion. The reproducing head portion and the recording head portion are formed of a lower magentic layer, an electroconductive coil layer, an upper magnetic layer and insulation layers interposed therebetween, deposited in stacked relation on the substrate one after another. The first and second head chips are arranged in side-by-side relation and are inverted with respect to each other so that the recording head portion in the first head chip and the reproducing head portion in the second head chip form a recording/reproducing head portion for a first traveling direction of a magnetic recording medium, and the reprducing head portion in the first head chip and the recording head portion in the second head chip form a recording/reproducing head portion for a second or reverse traveling direction of the recording medium.

摘要翻译： 薄膜磁头包括第一和第二磁头芯片，每个磁头芯片具有基板，设置在基板的侧边缘部分中的再现磁头部分以及将再现磁头部分和记录头部分转换的保护板。 再现头部和记录头部由下部磁性层，导电线圈层，上部磁性层和介于其间的绝缘层形成，并以堆叠的关系沉积在衬底上。 第一头芯片和第二头部芯片被并排布置并且相对于彼此反转，使得第一头部芯片中的记录头部分和第二头部芯片中的再现头部分形成记录/再现头部 用于磁记录介质的第一行进方向的部分，并且第一磁头芯片中的再生头部分和第二磁头芯片中的记录头部分形成用于记录介质的第二或反向行进方向的记录/再现磁头部分 。