公开(公告)号：US4354212A

公开(公告)日：1982-10-12

申请号：US166808

申请日：1980-07-08

申请人： Norimoto Nouchi ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura

发明人： Norimoto Nouchi ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura

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

CPC分类号： G11B5/3932

摘要： A magnetic head and a production method therefore in which permanent magnet films for applying a DC bias magnetic field Hd h to a magnetoresistive effect element film (MR element film) is arranged on both sides of the thickness dimension of the MR element film through at least a non-magnetic film therebetween. In making the MR element film thicker in order to reduce distortion, the DC bias magnetic field Hd b to be applied to the MR element film is also required to be increased. Unlike the prior art in which the above-mentioned requirement is met by increasing the thickness of the permanent magnet film under the thickness of the MR element film resulting in the problem of breakage of a film member above or under the thickness of the permanent magnet film, the invention further comprises a second permanent magnet film above the thickness of the MR element film without increasing the thickness of the first permanent magnet film. In the case of a magnetic head with a shield members of soft magnetic material holding the MR element film from both sides of the thickness thereof, the MR element film is made thicker to make reproduction possible without any distortion or without substantially increasing the gap. For this purpose, the MR element film is held on the sides above and under the thickness thereof by first and second permanent magnet films which in turn are held by the shield members. To minimize distribution of the MR element film, a comparatively high-temperature process after forming of the MR element film i.e., forming of the second permanent magnet film is effected at optimum temperature, and a magnetic field is applied along the magnetic easy axis of the MR element film.

摘要翻译： 因此，磁头及其制造方法，其中用于将DC偏置磁场Hd h施加到磁阻效应元件膜（MR元件膜）的永磁体膜至少布置在MR元件膜的厚度尺寸的两侧 它们之间的非磁性膜。 为了使MR元件膜变厚以减少畸变，还需要增加施加到MR元件膜的DC偏置磁场Hd b。 不同于通过在MR元件膜的厚度下增加永磁体膜的厚度来满足上述要求的现有技术，导致膜构件在永磁体膜的厚度以上或以下的厚度的断裂的问题 本发明还包括在MR元件膜的厚度之上的第二永磁体膜，而不增加第一永磁体膜的厚度。 在具有从其厚度的两侧保持MR元件膜的软磁材料的屏蔽构件的磁头的情况下，将MR元件膜制成更厚以使得再现成为可能而没有任何变形或基本上不增加间隙。 为此，MR元件膜通过第一和第二永磁体膜保持在其厚度的上方和下方，该永磁体膜又由屏蔽部件保持。 为了最小化MR元件膜的分布，在形成MR元件膜之后进行比较高温处理，即形成第二永久磁铁膜，在最佳温度下进行，沿着磁性容易轴施加磁场 MR元件膜。

公开(公告)号：US4072993A

公开(公告)日：1978-02-07

申请号：US629981

申请日：1975-11-07

申请人： Noboru Nomura ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Norimoto Nouchi

发明人： Noboru Nomura ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Norimoto Nouchi

IPC分类号： G11B5/17 ,  G11B5/31 ,  H01L25/10 ,  G11B5/27 ,  G11B5/20 ,  G11B5/22

CPC分类号： G11B5/17 ,  G11B5/31 ,  G11B5/313 ,  H01L25/10 ,  H01L2924/0002

摘要： A multi-element magnetic head having a plurality of magnetic heads, in which a common electrode common to the coils of the individual heads is provided. By this construction the number of electrodes is reduced and also the area required for contact between leads from an external circuit and electrodes are reduced. Thus, it is made possible to reduce the head pitch of the magnetic heads.

摘要翻译： 一种具有多个磁头的多元件磁头，其中设置有各个磁头的线圈共用的公共电极。 通过这种结构，电极的数量减少，并且还减少了来自外部电路和电极的引线之间接触所需的面积。 因此，可以减小磁头的磁头间距。

公开(公告)号：US4672496A

公开(公告)日：1987-06-09

申请号：US400596

申请日：1982-07-22

申请人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura ,  Yuuji Omata

发明人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura ,  Yuuji Omata

IPC分类号： G11B5/127 ,  G11B5/49 ,  G11B5/147

CPC分类号： G11B5/4907 ,  G11B5/1278

摘要： A thin magnetic film is deposited over a nonmagnetic or piezoelectric substrate. When a shock wave is propagated through this substrate from its one end to the other end, the permeability of the thin magnetic film is locally increased and a portion or region having a high permeability also travels from one end to the other end of the thin magnetic film in unison with the shock wave. A magnetic core with a signal winding is disposed and magnetically coupled with the thin magnetic film. The signal can be recorded or reproduced while the recording medium is scanned.

摘要翻译： 薄磁膜沉积在非磁性或压电衬底上。 当冲击波从其一端传播到另一端时，薄磁性膜的磁导率局部增加，并且具有高磁导率的部分或区域也从薄磁体的一端到另一端传播 电影与冲击波一致。 具有信号绕组的磁芯被设置并与薄磁膜磁耦合。 可以在扫描记录介质时记录或再现信号。

公开(公告)号：US4477794A

公开(公告)日：1984-10-16

申请号：US406894

申请日：1982-08-10

申请人： Noboru Nomura ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Yuji Omata

发明人： Noboru Nomura ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Yuji Omata

IPC分类号： G11B5/39 ,  H01L43/08 ,  G11B5/30

CPC分类号： G11B5/3903 ,  H01L43/08

摘要： The invention provides a magnetoresistive element which magnetostatically has magnetic anisotropy to control a domain structure and which eliminates Barkhousen noise that will cause abrupt movement of domain walls and irregular magnetization due to a change in the signal magnetic field, wherein a grating pattern is formed on at least one surface of a magnetoresistive film by a process in which a grating pattern is unidirectionally formed on the surface of a substrate and the magnetoresistive film of a ferromagnetic body is deposited thereon. Further, various magnetoresistive elements to which a novel bias method is applied are provided.

摘要翻译： 本发明提供一种磁阻元件，其磁静态地具有磁各向异性以控制畴结构，并且消除了由于信号磁场的变化引起的畴壁突然移动和不规则磁化的巴克霍森噪声，其中光栅图案形成在 通过在基板的表面上单向形成光栅图案并且在其上沉积铁磁体的磁阻膜的工艺，形成磁阻膜的至少一个表面。 此外，提供了应用了新的偏置方法的各种磁阻元件。

公开(公告)号：US4068272A

公开(公告)日：1978-01-10

申请号：US632761

申请日：1975-11-17

申请人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Norimoto Nouchi ,  Noboru Nomura

发明人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Norimoto Nouchi ,  Noboru Nomura

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

CPC分类号： G11B5/3925 ,  G11B5/3903 ,  G11B5/3977 ,  G11B5/398

摘要： This invention provides a high sensitivity magnetic head using magneto-resistive effect elements consisting of ferromagnetic thin plates and allows construction of a high precision multi-track head by using thin film and photo-etching techniques. The magnetic head comprises a base, two flux converging cores forming a magnetic gap, a detecting portion provided between the two flux converging cores and extending at right angles to the end of the base, one end of the detecting portion being located in the neighborhood of the gap and having a smaller sectional area than the other portions, and detecting electrodes provided at the opposite ends of the detecting portion. At least one of the two cores is of a ferromagnetic material and integrally formed on the base.

摘要翻译： 本发明提供了使用由铁磁薄板构成的磁阻效应元件的高灵敏度磁头，并且通过使用薄膜和光蚀刻技术来构造高精度多轨头。 磁头包括基座，形成磁隙的两个磁通会聚磁芯，设置在两个磁通会聚磁芯之间并与基座的端部成直角延伸的检测部分，检测部分的一端位于 所述间隙具有比其他部分更小的截面面积，以及设置在所述检测部分的相对端的检测电极。 两个芯中的至少一个是铁磁材料并且一体地形成在基部上。

公开(公告)号：US4504540A

公开(公告)日：1985-03-12

申请号：US582866

申请日：1984-02-27

申请人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Noboru Nomura ,  Yuji Omata

发明人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Noboru Nomura ,  Yuji Omata

IPC分类号： G11B5/255 ,  G11B5/31 ,  H01F10/32 ,  H01L21/31 ,  B32B3/00 ,  B32B9/04

CPC分类号： B82Y25/00 ,  G11B5/3106 ,  H01F10/324 ,  H01F10/3254 ,  Y10S428/90 ,  Y10S428/901 ,  Y10T428/1193 ,  Y10T428/24802 ,  Y10T428/24851 ,  Y10T428/24917

摘要： The invention provides a thin film element which includes a thin film of an organic material, which has a multilayered structure of thin films, and which has a protective film of multilayered structure having films of at least two nonmagnetic materials, or of a thin film of a mixture of at least two nonmagnetic insulating materials. The protective film has a low internal stress, and the step coverage and adhesion strength thereof at edges of the high step portion is excellent.

摘要翻译： 本发明提供一种薄膜元件，其包括具有薄膜多层结构的有机材料薄膜，并且具有具有至少两个非磁性材料的膜的多层结构的保护膜或薄膜的薄膜 至少两种非磁性绝缘材料的混合物。 保护膜的内部应力低，高台阶部的边缘的台阶覆盖率和粘合强度优异。

公开(公告)号：US4490760A

公开(公告)日：1984-12-25

申请号：US340367

申请日：1982-01-18

申请人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Noboru Nomura

发明人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Noboru Nomura

IPC分类号： G11B5/187 ,  G11B5/31 ,  H01F10/28 ,  G11B5/16 ,  G11B5/20 ,  G11B5/25

CPC分类号： G11B5/31

摘要： A thin-film magnetic head having a magnetic substrate made from ferrite, iron-aluminum-silicon alloy or like material, and an upper magnetic layer formed on the magnetic substrate with a lower magnetic layer and a conductive layer interposed therebetween. A portion of the upper magnetic layer is jointed to the magnetic substrate while another portion of the upper magnetic layer is jointed to the lower magnetic layer through a non-magnetic layer of SiO.sub.2 or like material constituting a magnetic gap. The lower magnetic layer, magnetic substrate, upper magnetic layer and the non-magnetic layer in combination form a closed magnetic circuit. A groove is defined between the lower magnetic layer and the magnetic substrate, and formed in the side surface of the magnetic substrate adapted to face a magnetic recording medium. The recess is filled with a non-magnetic material such as glass. Accordingly, it is possible to realize a definite pole piece length to permit an improvement in short-wavelength reproduction characteristics.

摘要翻译： 具有由铁氧体，铁 - 铝 - 硅合金等材料制成的磁性基板的薄膜磁头和在磁性基板上形成有较低磁性层和介于其间的导电层的上部磁性层。 上部磁性层的一部分与磁性基板接合，另一部分上部磁性层通过构成磁隙的SiO 2或类似材料的非磁性层与下部磁性层接合。 下磁层，磁性基板，上磁层和非磁性层组合形成闭合磁路。 在下磁性层和磁性基板之间形成凹槽，并且形成在适于面向磁记录介质的磁性基板的侧表面中。 该凹部填充有诸如玻璃之类的非磁性材料。 因此，可以实现确定的极片长度以允许改善短波长再现特性。

公开(公告)号：US4402801A

公开(公告)日：1983-09-06

申请号：US405059

申请日：1982-08-04

申请人： Yuji Omata ,  Nobuyuki Kaminaka ,  Kenji Kanai ,  Noboru Nomura

发明人： Yuji Omata ,  Nobuyuki Kaminaka ,  Kenji Kanai ,  Noboru Nomura

IPC分类号： G11B5/31 ,  C25D5/02

CPC分类号： G11B5/3163

摘要： The invention provides a method for manufacturing a thin film magnetic head with a low step structure having a first nonmagnetic insulating layer, a lower magnetic layer, a nonmagnetic insulating layer of a thickness corresponding to a gap length, a second nonmagnetic insulating layer, a conductive layer which constitutes a coil, a third nonmagnetic insulating layer, and an upper magnetic layer, each of which is sequentially formed on a nonmagnetic conductive substrate in the order named. A conductive layer is formed in a recess whose bottom surface corresponds to an exposed upper surface of the nonmagnetic conductive substrate and which is formed in a predetermined portion of the first nonmagnetic insulating layer formed on the nonmagnetic conductive substrate. Thereafter, electroplating is performed to form a yoke portion of the lower magnetic layer in the recess by applying a voltage to the conductive layer as an electrode through the nonmagnetic conductive substrate. Further, a magnetic layer of a predetermined thickness is formed on the yoke portion and in its vicinity to increase the thickness of the yoke.

摘要翻译： 本发明提供了一种制造具有低阶结构的薄膜磁头的方法，该方法具有第一非磁性绝缘层，下磁性层，厚度对应于间隙长度的非磁性绝缘层，第二非磁性绝缘层，导电 构成线圈的层，第三非磁性绝缘层和上磁性层，其顺序地以顺序形成在非磁性导电基板上。 导电层形成在其底表面对应于非磁性导电衬底的暴露的上表面并且形成在形成在非磁性导电衬底上的第一非磁性绝缘层的预定部分中的凹部中。 此后，通过对作为电极的导电层施加电压，通过非磁性导电性基板，进行电镀，从而在凹部中形成下部磁性层的磁轭部。 此外，在磁轭部分及其附近形成预定厚度的磁性层以增加磁轭的厚度。

公开(公告)号：US4394699A

公开(公告)日：1983-07-19

申请号：US236307

申请日：1981-02-20

申请人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Norimoto Nouchi ,  Noboru Nomura

发明人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Norimoto Nouchi ,  Noboru Nomura

IPC分类号： G11B5/39 ,  G11B5/12 ,  G11B5/22 ,  G11B5/30

CPC分类号： G11B5/3903 ,  G11B5/3948

摘要： A thin-film magnetic head employing a magneto-resistive element (MR element), which comprises a substrate, a layer of MR element deposited on said substrate and a conductor layer for supplying said MR element with an electric current in the longitudinal direction thereof. The substrate has at least two crystal axes in the plane parallel to the surface on which said magnetoresistive element is disposed. The respective coefficients of thermal expansion in the directions of said two crystal axes are different from each other. The coefficients of thermal expansion in the directions of said two crystal axes, the orientations of said two crystal axes and the magnetostriction coefficient of the MR element are adjusted in a relationship whereby an internal stress is imparted due to the difference between the temperature during deposition of the MR element and the room temperature, and the thus imparted stress operates to provide the spins within the MR element with a tendency to be oriented in said longitudinal direction of the MR element.

摘要翻译： 一种使用磁阻元件（MR元件）的薄膜磁头，其包括衬底，沉积在所述衬底上的MR元件层和用于向所述MR元件沿其纵向方向提供电流的导体层。 基板在与设置有磁阻元件的表面平行的平面中具有至少两个晶轴。 所述两个晶轴的方向上的各自的热膨胀系数彼此不同。 所述两个晶轴的方向的热膨胀系数，所述两个晶轴的取向和MR元件的磁致伸缩系数被调整为由于沉积期间的温度之间的差异而产生内部应力的关系 MR元件和室温，并且由此赋予的应力操作以使MR元件内的自旋在MR元件的所述纵向方向上具有定向倾向。

公开(公告)号：US4318148A

公开(公告)日：1982-03-02

申请号：US165104

申请日：1980-07-01

申请人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Norimoto Nouchi ,  Noboru Nomura

发明人： Nobuyuki Kaminaka ,  Kenji Kanai ,  Norimoto Nouchi ,  Noboru Nomura

IPC分类号： G11B5/31 ,  G11B5/14 ,  G11B5/20

CPC分类号： G11B5/31

摘要： A thin-film magnetic head constructed by depositing a conductor layer formed in a spiral pattern having two or more turns on a magnetic substrate. A non-magnetic insulating layer is then formed to fill the spaces between turns of the conductive layer in such a manner that the thickness of the non-magnetic layer is substantially the same as that of the conductor layer. A further non-magnetic insulating layer and a magnetic layer are formed successively on the non-magnetic layer. A gap is formed on one side of the lamination between the magnetic layer and the magnetic substrate interposing the further non-magnetic insulating layer. A magnetic circuit through the magnetic layer and the magnetic substrate around the conductive layer includes therein the gap.

摘要翻译： 一种薄膜磁头，其通过在磁性基板上沉积形成具有两个或多个匝的螺旋图案的导体层而构成。 然后形成非磁性绝缘层，以使得非导电层的厚度与导体层的厚度基本相同的方式填充导电层的匝之间的空间。 在非磁性层上依次形成另外的非磁性绝缘层和磁性层。 在磁性层和插入另外的非磁性绝缘层的磁性基板之间的层叠的一侧上形成间隙。 通过磁性层和围绕导电层的磁性基底的磁路在其中包括间隙。