公开(公告)号：US4405958A

公开(公告)日：1983-09-20

申请号：US358633

申请日：1982-03-16

申请人： Masaya Hijikigawa

发明人： Masaya Hijikigawa

IPC分类号： G11B15/087 ,  G11B5/39 ,  G11B5/48 ,  G11B15/60 ,  G11B15/665 ,  G11B27/10 ,  G11B27/32 ,  G11B5/12

CPC分类号： G11B15/6656 ,  G11B27/107 ,  G11B27/326 ,  G11B5/39 ,  G11B5/4893 ,  G11B2220/90

摘要： A magnetic record-reproduction device is provided for controlling a program selection system of a tape containing a recording member and a base element. The recording member records cue signals indicating positions of programs on the tape to be reproduced. The base element supports the recording member. A magnetoresistive head comes into contact with the base element for detecting and reproducing the cue signals recorded in the recording member.

摘要翻译： 提供磁记录再现装置，用于控制包含记录部件和基体元件的带的程序选择系统。 记录构件记录指示要再现的磁带上节目的位置的提示信号。 基座支撑记录部件。 磁阻头与基座元件接触，用于检测和再现记录在记录元件中的提示信号。

公开(公告)号：US4388662A

公开(公告)日：1983-06-14

申请号：US229039

申请日：1981-01-28

申请人： Frederick Jeffers ,  Richard J. McClure

发明人： Frederick Jeffers ,  Richard J. McClure

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

CPC分类号： G11B5/3925 ,  G11B5/3945 ,  G11B5/3964

摘要： A flux-responsive magnetic head having a transducer gap also has first and second back gaps across which, respectively, are first and second thin film magnetoresistive elements. The elements have similarly oriented magnetization vectors and, as such, the magnetoresistive elements are differentially responsive to flux entering said transducer gap. Spurious fields, however, have no differential effect on the resistances of the magnetoresistive elements. In a preferred form of the invention, an additional, similar working, pair of magnetoresistive elements is employed across the back gaps, such additional elements not only providing increased signal response, but also serving as keepers for the first pair of magnetoresistive elements.

摘要翻译： 具有换能器间隙的磁通响应磁头还具有分别成为第一和第二薄膜磁阻元件的第一和第二后隙。 这些元件具有相似的取向的磁化矢量，因此，磁阻元件对进入所述换能器间隙的磁通有差异地响应。 然而，杂散场对磁阻元件的电阻没有差别影响。 在本发明的优选形式中，在后隙中采用了附加的类似工作的磁阻元件对，这样的附加元件不仅提供增加的信号响应，而且还用作第一对磁阻元件的保持器。

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：US4280158A

公开(公告)日：1981-07-21

申请号：US45908

申请日：1979-06-06

申请人： Edmond de Niet

发明人： Edmond de Niet

IPC分类号： G11B5/00 ,  G11B5/02 ,  G11B5/035 ,  G11B5/39 ,  G11B23/00 ,  G11B5/12 ,  G11B5/30

CPC分类号： G11B5/3903 ,  G11B23/0007 ,  G11B5/035 ,  G11B2005/0016 ,  G11B2005/0018

摘要： A magnetic reading head having a magnetoresistive element which is connected to a reading amplifier. In order to reduce the modulation noise (Barkhausen effect) when making the relationship between the resistance variation and the strength of the signal field linear in a negative feedback loop of the reading amplifier an electric turn is present which turn is positioned relative to the magnetoresistive element in such manner that a negative feedback field (Ht) can be generated with it which causes a magnetic flux in the element which is directed oppositely to the magnetic flux caused in the element by a magnetic field (H.sub.y) to be detected.

摘要翻译： 具有连接到读取放大器的磁阻元件的磁读头。 为了减小调制噪声（Barkhausen效应），当在读取放大器的负反馈环路中产生电阻变化和线性强度之间的关系时，存在转向相对于磁阻元件 以这样的方式，可以产生负反馈场（Ht），其使得元件中的磁通量与通过检测的磁场（Hy）在元件中引起的磁通相反地引导。

公开(公告)号：US4259703A

公开(公告)日：1981-03-31

申请号：US46850

申请日：1979-06-08

申请人： Ian R. Young ,  Ramesh Mistry

发明人： Ian R. Young ,  Ramesh Mistry

IPC分类号： G11B5/39 ,  G11B5/12 ,  G11B5/47

CPC分类号： G11B5/39

摘要： A magneto resistive transducer arrangement in which a magneto resistive transducer element is biassed by a periodic bidirectional magnetic field. A lack of coincidence between a minimum in the resistance of the element and a zero in the biassing field indicates the presence of an external field. The arrangement may be used for recovering information in a magnetisable record medium.

摘要翻译： 一种磁电阻换能器装置，其中磁阻式换能器元件被周期性的双向磁场所偏压。 元件电阻的最小值与偏置场中的零点之间缺乏一致性，表明存在外部场。 该装置可以用于恢复可磁化记录介质中的信息。

公开(公告)号：US4258401A

公开(公告)日：1981-03-24

申请号：US34564

申请日：1979-04-30

申请人： Masahide Yoshida ,  Takashi Kodama

发明人： Masahide Yoshida ,  Takashi Kodama

IPC分类号： G11B5/127 ,  G11B5/29 ,  G11B5/12

CPC分类号： G11B5/29 ,  G11B5/1278

摘要： A multi-channel record/playback head is disposed which is used with a magnetic recording medium of vertical magnetization type. The head comprises a plurality of magnetic head elements each including a magnetic record/playback pole disposed opposite to the surface of the medium and a flux conducting pole disposed opposite to a lateral end face of the medium. The elements are arranged so that the individual record/playback poles define different tracks across the width of the medium.

摘要翻译： 配置有与垂直磁化型磁记录介质一起使用的多通道记录/重放头。 头包括多个磁头元件，每个磁头元件包括与介质表面相对设置的磁记录/重放磁极和与介质的侧端面相对设置的磁通导通极。 元件被布置成使得各个记录/回放杆在介质的宽度上定义不同的轨迹。

公开(公告)号：US4251842A

公开(公告)日：1981-02-17

申请号：US945295

申请日：1978-09-25

申请人： Shunichi Iwasaki ,  Yoshihisa Nakamura

发明人： Shunichi Iwasaki ,  Yoshihisa Nakamura

IPC分类号： G11B5/02 ,  G11B5/09 ,  G11B5/127 ,  G11B5/78 ,  G11B5/12 ,  G11B5/25

CPC分类号： G11B5/1278 ,  G11B5/02

摘要： A magnetic recording and reproducing device using a double-layered magnetic recording medium having a first layer with an anisotropy perpendicular to the medium plane and having a second layer with a lower coercive force than the first layer. A single pole magnetic head is arranged so as to magnetize the recording medium in a direction perpendicular to the recording medium plane.

摘要翻译： 一种使用具有垂直于介质平面的各向异性的第一层并具有比第一层低的矫顽力的第二层的双层磁记录介质的磁记录和再现装置。 设置单极磁头，以便在与记录介质平面垂直的方向上磁化记录介质。

公开(公告)号：US4184631A

公开(公告)日：1980-01-22

申请号：US899217

申请日：1978-04-24

申请人： Jean-Pierre Lazzari

发明人： Jean-Pierre Lazzari

IPC分类号： G06K1/12 ,  G06K7/08 ,  G11B5/39 ,  G11B20/10 ,  G11B23/00 ,  G11B5/12 ,  G11B5/20

CPC分类号： G11B5/3945 ,  G06K1/125 ,  G06K7/087 ,  G11B23/0007

摘要： There is provided a reader for reading information magnetically coded on a carrier. The reader includes a magnetizing device for magnetizing the information precoded on the carrier and a transducer for detecting the magnetized information as the carrier is translated successively past the magnetizer and transducer. The magnetizer includes at least one magnetic layer having a succession of adjoining zones, the length of alternate zones being much greater than the length of the other zones and the magnetic induction in the zones being of opposite sense. The transducer includes at least one magneto-resistive detecting member and a magneto-resistive compensating member which are of anisotropic magnetic material. The members are disposed to develop across the compensating member a voltage in response to the interference magnetic field which is equal to that developed across the detecting member due to that field. However, the compensating element is positioned so as to be outside of the magnetic leakage field of the coded information. The leakage field of the magnetizing device is utilized to polarize the magnetic-resistive members by causing their axes of easy magnetization to rotate through an angle .theta. between 0.degree. and 90.degree. and preferably 45.degree..

摘要翻译： 提供了一种用于读取在载体上磁编码的信息的读取器。 读取器包括用于对载体上预编码的信息进行磁化的磁化装置和用于当载体相继经过磁化器和换能器平移时检测磁化信息的换能器。 磁化器包括至少一个具有连续相邻区域的磁性层，交替区域的长度远大于其它区域的长度，并且区域中的磁感应具有相反的意义。 换能器包括至少一个各向异性磁性材料的磁阻检测构件和磁阻补偿构件。 这些构件被布置成跨越补偿构件跨越由于该场而与检测构件上形成的干涉磁场相等的干涉磁场的电压。 然而，补偿元件被定位成在编码信息的磁泄漏场外。 励磁装置的泄漏场用于通过使其易磁化的轴线旋转角度θ在0°至90°之间并且优选45°的方式使磁阻元件极化。

公开(公告)号：US4170788A

公开(公告)日：1979-10-09

申请号：US839467

申请日：1977-10-04

申请人： Komei Hashimoto ,  Masahiro Komatsubara ,  Shinji Yasuda ,  Yutaka Masumoto ,  Kazuhiko Satoh

发明人： Komei Hashimoto ,  Masahiro Komatsubara ,  Shinji Yasuda ,  Yutaka Masumoto ,  Kazuhiko Satoh

IPC分类号： G11B5/10 ,  G11B5/105 ,  G11B5/115 ,  G11B5/147 ,  G11B5/187 ,  G11B5/21 ,  G11B5/23 ,  G11B5/255 ,  G11B5/29 ,  G11B5/40 ,  G11B5/12 ,  G11B5/251

CPC分类号： G11B5/147 ,  G11B5/10 ,  G11B5/21 ,  G11B5/40

摘要： A magnetic head for tape recorders and the like is manufactured with cores made of alloys of elements such as Al and Fe which have relatively large potential differences. In order to avoid the galvanic effect which may be produced by segregation and impurities in the alloys, a part of the tape sliding surface is made of an element such as Zn which is lower in galvanic potential than elements forming the cores, and that part of the tape sliding surface is made electrically conductive to the cores.

摘要翻译： 用于磁带记录器等的磁头用由具有相对较大电位差的诸如Al和Fe的元素的合金制成的芯制成。 为了避免由合金中的偏析和杂质产生的电偶效应，磁带滑动面的一部分由诸如形成芯的元件的电位电位较低的诸如Zn的元素制成，并且该部分 磁带滑动表面与磁芯导电。

公开(公告)号：US4165525A

公开(公告)日：1979-08-21

申请号：US877825

申请日：1978-02-15

申请人： Gerrit J. Koel ,  Willem F. Druyvesteyn

发明人： Gerrit J. Koel ,  Willem F. Druyvesteyn

IPC分类号： G11B5/31 ,  G11B5/12 ,  G11B5/20

CPC分类号： G11B5/313 ,  G11B5/31

摘要： A thin-film magnetic head in which the electrically conductive magnetic material of the core is wound directly a number of times around an electrical conductor which ensures the energization of the head presents the advantage that the manufacture can take place by means of exclusively electroplating methods, since in this configuration no insulating layers are necessary between the material of the core and the conductor.

摘要翻译： 一种薄膜磁头，其中磁芯的导电磁性材料直接缠绕在电导体周围多次，这确保磁头的通电具有以下优点：可以通过专门的电镀方法进行制造， 由于在这种结构中，在芯材和导体之间不需要绝缘层。