公开(公告)号：US5323285A

公开(公告)日：1994-06-21

申请号：US902619

申请日：1992-06-23

申请人： Neil Smith

发明人： Neil Smith

IPC分类号： G11B5/115 ,  G11B5/02 ,  G11B5/31 ,  G11B5/39 ,  G11B5/30

CPC分类号： G11B5/3954 ,  G11B5/3912

摘要： A shorted dual MR head which is magnetically shielded for the purpose of isolating the dual MR head from extraneous magnetic fields and from long wavelength recorded signals which could cause nonlinear distortion of the dual MR head but not shielded for the purpose of improving linear resolution. The magnetic shields do not significantly affect linear resolution of the dual MR head and can be spaced apart from the dual MR head over a wide range of separation distances limited by factors other than the characteristic bit length of the magnetic signal to be resolved. In one embodiment, at least one shielding element for the dual MR head can be one of the poles or other components of an inductive record head and, together, the two heads can form an integrated thin-film inductive record/MR reproduce head assembly.

摘要翻译： 用于将双MR磁头与外部磁场和长波长记录信号隔离的短路双MR磁头，其可能导致双MR磁头的非线性失真，而不是为了提高线性分辨率的目的而被屏蔽。 磁屏蔽不会显着影响双MR磁头的线性分辨率，并且可以在由要分辨的磁信号的特征位长度以外的因素限制的宽范围的间隔距离处与双MR磁头间隔开。 在一个实施例中，用于双MR头的至少一个屏蔽元件可以是感应记录头的极或其它部件中的一个，并且两个头一起可以形成集成的薄膜感应记录/ MR再现头组件。

公开(公告)号：US5270892A

公开(公告)日：1993-12-14

申请号：US894393

申请日：1992-06-05

申请人： Steven L. Naberhuis

发明人： Steven L. Naberhuis

IPC分类号： G01D5/245 ,  G01R33/09 ,  G11B5/39 ,  H01L43/08 ,  G11B5/30

CPC分类号： G11B5/3954 ,  G11B5/3903

摘要： In a dual stripe magnetoresistive transducer a unique conductor configuration is provided that allows close spacing of the two magnetoresistive stripes while providing a nearly identical topography for each of the stripes. A first conductor is arranged on a transducer substrate with an associated magnetoresistive stripe oriented directly above the conductor. A second magnetoresistive stripe is arranged above the first stripe. The second MR stripe, in turn, has an associated conductor oriented above it such that the two stripes may be brought close together, separated only by a thin dielectric layer.

公开(公告)号：US4800454A

公开(公告)日：1989-01-24

申请号：US83408

申请日：1987-08-10

申请人： Edward L. Schwarz ,  Beat G. Keel

发明人： Edward L. Schwarz ,  Beat G. Keel

IPC分类号： G11B5/31 ,  G11B5/40 ,  G11B5/60 ,  G11B5/30

CPC分类号： G11B5/6005 ,  G11B5/3106 ,  G11B5/40

摘要： A thin film magnetic data transducer carried on the end of a conductive flyer has its magnetic pole electrically connected to the flyer to prevent electrostatic discharges between the flyer and the pole tip from eroding the pole tip. The winding of the transducer is also electrically connected to the flyer either through a high resistance, through a diode with high forward and reverse voltage drops, or through a fusible link, so as to bleed off static charges on the winding without their arcing through to the magnetic pole and damaging the insulation between the winding and the magnetic pole. These embodiments avoid any degrading of the data readback signal.

摘要翻译： 承载在导电翼片端部的薄膜磁数据传感器的磁极电连接到传单，以防止飞翼和极尖之间的静电放电侵蚀极尖。 换能器的绕组也可以通过高电阻，通过具有高正向和反向电压降的二极管或通过可熔链路电连接到传单，以便在绕组上渗出静电荷，而不会电弧通过 磁极和损坏绕组和磁极之间的绝缘。 这些实施例避免数据回读信号的任何劣化。

公开(公告)号：US4782413A

公开(公告)日：1988-11-01

申请号：US43674

申请日：1987-04-28

申请人： James K. Howard ,  Ting C. Huang

发明人： James K. Howard ,  Ting C. Huang

IPC分类号： G01R33/09 ,  G11B5/39 ,  H01L43/08 ,  H01L43/10 ,  G11B5/12 ,  G11B5/30

CPC分类号： G11B5/3903

摘要： An improved thin film magnetoresistive (MR) sensor uses an iron-manganese (FeMn) alloy, with the alpha (body-centered-cubic) phase of FeMn present in the alloy, as an antiferromagnetic layer. The presence of alpha FeMn improves the longitudinal exchange bias in the ferromagnetic MR layer, especially when the amount of alpha FeMn exceeds the amount of gamma (face-centered-cubic) FeMn in the FeMn layer.

公开(公告)号：US4663685A

公开(公告)日：1987-05-05

申请号：US766157

申请日：1985-08-15

申请人： Ching H. Tsang

发明人： Ching H. Tsang

IPC分类号： G01R33/09 ,  G11B5/39 ,  H01L43/08 ,  G11B5/30

CPC分类号： B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  H01L43/08

摘要： A magnetoresistive (MR) read transducer assembly in which the thin film MR layer is longitudinally biased only in the end regions by exchange bias developed by a thin film of antiferromagnetic material that is deposited in direct contact with the MR layer in the end regions. The longitudinal bias is of a level sufficient to maintain the end regions of the MR layer in a single domain state and thereby induce a single domain state in the central region of the MR layer. Transverse bias is produced within the central region of the MR layer of a level sufficient to maintain that region of the MR layer in a linear response mode. Spaced conductive elements are connected to the MR layer within the central region to define a detection region so that signal output means connected to the conductive elements can determine the resistance changes in the detection region of the MR layer as a function of the fields which are intercepted by the MR layer.

摘要翻译： 一种磁阻（MR）读取传感器组件，其中薄膜MR层仅在末端区域中纵向偏置，该交换偏压是由反铁磁性材料薄膜所形成的，该薄膜与端层区域中的MR层直接接触。 纵向偏压的水平足以将MR层的端部区域维持在单一畴状态，从而在MR层的中心区域中引起单畴状态。 在MR层的中心区域内产生一个足以将该MR层的区域维持在线性响应模式的水平的横向偏压。 间隔的导电元件连接到中心区域内的MR层以限定检测区域，使得连接到导电元件的信号输出装置可以确定MR层的检测区域中的电阻变化，作为截断的场的函数 由MR层。

公开(公告)号：US4663684A

公开(公告)日：1987-05-05

申请号：US694764

申请日：1985-01-25

申请人： Yoshihisa Kamo ,  Naoki Sato ,  Masahiro Kitada ,  Tooru Takeura

发明人： Yoshihisa Kamo ,  Naoki Sato ,  Masahiro Kitada ,  Tooru Takeura

IPC分类号： G01R33/09 ,  G11B5/39 ,  G11B5/30

CPC分类号： B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3932 ,  G11B5/399

摘要： Disclosed is a magnetic transducer using a magnetoresistance effect, comprising a magnetoresistive film, a hard magnetic film for applying a transverse biasing magnetic field thereto, and a conductive film through which current for applying the transverse biasing magnetic field to the magnetoresistive film flows. The conductive film may be either in electrical contact with or in electrical insulation from the magnetoresistive film. In this magnetic transducer, even when the heights of the respective constituents have changed, the transverse biasing magnetic field to be applied does not change considerably, and an optimum bias field strength is readily attained.

摘要翻译： 公开了一种使用磁阻效应的磁传感器，包括磁阻膜，用于向其施加横向偏置磁场的硬磁膜，以及用于向磁阻膜施加横向偏置磁场的电流的导电膜。 导电膜可以与磁阻膜电接触或者与电绝缘。 在这种磁换能器中，即使各构成部件的高度发生变化，所施加的横向偏置磁场也不会发生显着变化，容易获得最佳的偏置磁场强度。

公开(公告)号：US4613918A

公开(公告)日：1986-09-23

申请号：US483614

申请日：1983-04-11

申请人： Kenji Kanai ,  Seishi Sasaki ,  Ken Takahashi ,  Ryuji Sugita

发明人： Kenji Kanai ,  Seishi Sasaki ,  Ken Takahashi ,  Ryuji Sugita

IPC分类号： G11B5/127 ,  G11B5/39 ,  G11B5/40 ,  G11B5/12 ,  G11B5/30

CPC分类号： G11B5/3919 ,  G11B5/1278 ,  G11B5/3903 ,  G11B5/399 ,  G11B5/40

摘要： A magneto-resitive playback head and a recording and reproducing device for reproducing a recording signal from a double-layered film type perpendicular magnetic recording medium. The playback head includes a magneto-resistive element included in high-permeability thin films and having one end portion facing the recording medium. The magneto-resistive element exhibits a magneto-resistance effect responsive to magnetic fluxes generated from signal magnetization in the recording medium. The head also includes electrodes for supplying an electric current longitudinally of the magneto-resistive element, and high-permeability members for introducing the signal magnetic fluxes passed through the magneto-resistive element again to the recording medium. A magnetic recording and reproducing device comprises the playback head, a thin film magnetic recording head, a recording circuit, a playback circuit, and a driving circuit which gives a relative motion between the medium and the heads.

摘要翻译： 磁性重放头和用于从双层膜型垂直磁记录介质再现记录信号的记录和再现装置。 重放头包括高磁导率薄膜中包含的具有面向记录介质的一个端部的磁阻元件。 磁阻元件表现出响应于记录介质中信号磁化产生的磁通量的磁阻效应。 磁头还包括用于在磁阻元件纵向提供电流的电极和用于将通过磁阻元件的信号磁通再次引入记录介质的高磁导率部件。 一种磁记录和再现装置包括重放头，薄膜磁记录头，记录电路，重放电路和驱动电路，其给出介质和磁头之间的相对运动。

公开(公告)号：US4562503A

公开(公告)日：1985-12-31

申请号：US515550

申请日：1983-07-20

申请人： Yoshiharu Fujioka ,  Akio Onuki ,  Shushi Takei

发明人： Yoshiharu Fujioka ,  Akio Onuki ,  Shushi Takei

IPC分类号： G11B5/33 ,  G11B5/127 ,  G11B5/53 ,  G11B5/30

CPC分类号： G11B5/1278 ,  G11B5/127 ,  G11B5/538

摘要： A main magnetic pole member and an auxiliary magnetic pole member of a perpendicular magnetic recording head are disposed such that they are opposed to each other with a recording medium for recording a signal thereon (i.e., a magnetic tape) interposed therebetween. In the central portion of a holder of the main magnetic pole member, a magnetic pole film is embedded such that its upper end edge is exposed on a sliding contact surface of the holder. The magnetic tape is brought into sliding contact with the magnetic pole film. A pair of electrodes are embedded in such a manner as to sandwich an upper end portion of the magnetic pole film within the holder, and at positions spaced by a suitable distance from such upper end portion of the magnetic pole film. The auxiliary magnetic pole member causes the generation of a uniform magnetic flux directed from the auxiliary magnetic pole member toward the magnetic pole film. The magnetic pole film is formed of a magnetic material which has its permeability varied upon application thereto of an electric field. When a voltage is applied to the electrodes in accordance with the signal, an electric field is formed in the magnetic pole film to increase or decrease the permeability thereof, thereby causing an increase or decrease in density of the magnetic flux in the vicinity of the magnetic pole film. Thus, the magnetization of the magnetic tape is inverted or noninverted with the result that perpendicular magnetic recording of the signal is effected.

摘要翻译： 垂直磁记录头的主磁极部件和辅助磁极部件被设置成使得它们彼此相对，并具有用于在其间记录信号的记录介质（即，磁带）。 在主磁极构件的保持器的中心部分中，嵌入磁极膜，使得其上端边缘暴露在保持器的滑动接触表面上。 磁带与磁极膜滑动接触。 一对电极被嵌入以将磁极膜的上端部夹在保持器内部以及与磁极膜的上端部隔开适当距离的位置。 辅助磁极部件产生从辅助磁极部件引导到磁极膜的均匀磁通量。 磁极膜由磁性材料形成，磁性材料在施加电场时其磁导率变化。 当根据该信号对电极施加电压时，在磁极膜中形成电场以增加或减少其磁导率，从而使得在磁性附近的磁通密度增加或减少 极片 因此，磁带的磁化反转或不反相，结果是信号的垂直磁记录被实现。

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。