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    Dual element magnetic transducer
    1.
    发明公开
    Dual element magnetic transducer 失效
    双元素磁传感器

    公开(公告)号：EP0111755A3

    公开(公告)日：1986-07-30

    申请号：EP83111414

    申请日：1983-11-15

    Applicant: International Business Machines Corporation

    Inventor： Best, John Stewart ,  Lee, Kenneth ,  Tsang, Ching Hwa

    IPC: G11B05/127 ,  G11B05/33 ,  G11B05/39 ,  G11B05/31

    CPC classification number: G11B5/3912 ,  G11B5/3967 ,  G11B5/398 ,  G11B5/399

    Abstract: A dual element magnetic transducer in which the thin film M/R read element is transversely biased by flux in the air gap of the inductive write core generated by a bias current supplied to the write winding. Flux in the air gap biases the M/R element because different integral portions of the M/R element have a different spatial relationship to parallel opposing portions of the inductive core. The flux which would normally pass through the gap substantially normal to the sides of the core defining the gap now tends to follow the M/R element along a direction normal or transverse to the media to a point where the distance between the M/R element and the core is smaller than where it entered. By appropriate control of the bias current and the spatial relationships, a relatively efficient, simple to manufacture dual element magnetic transducer is provided.

    MAGNETO-RESISTIVE THIN FILM HEAD FOR DIGITAL MAGNETIC STORAGE DEVICE
    2.
    发明申请
    MAGNETO-RESISTIVE THIN FILM HEAD FOR DIGITAL MAGNETIC STORAGE DEVICE 审中-公开
    用于数字磁性存储器件的磁阻薄膜头

    公开(公告)号：WO1988007741A1

    公开(公告)日：1988-10-06

    申请号：PCT/US1988000908

    申请日：1988-03-21

    Applicant: DIGITAL EQUIPMENT CORPORATION

    Inventor： DIGITAL EQUIPMENT CORPORATION ,  DAS, Shyam

    IPC: G11B05/39

    CPC classification number: G11B5/3925 ,  G11B5/09 ,  G11B5/11 ,  G11B5/3903 ,  G11B5/3954 ,  G11B5/398 ,  G11B2005/0008

    Abstract: A read/write head for use in a magnetic storage device in a digital data processing system for writing data in the form of magnetic flux onto, and reading data from a spinning magnetic disk. The head has two magnetic pole pieces (11, 12) each with a yoke region (13) which tapers to a pole tip (14) and an energizable coil (16) situated between the pole pieces in the yoke region for generating magnetic flux. One of the pole pieces has a slot (17) in the yoke region, and a strip (20) of magneto-resistive material is situated adjacent the slot. The magneto-resistive strip is adapted to be connected to sensing equipment which measures variations in the resistance of the magneto-resistive strip in response to the variations in the magnetic flux recorded on the media. Several slots may be formed in the pole pieces, and an elongated magneto-resistive strip (42) may be situated adjacent the slots.

    Abstract translation: 一种用于数字数据处理系统中的磁存储装置的读/写头，用于以磁通量的形式将数据写入到旋转磁盘上并从旋转磁盘读取数据。 头部具有两个磁极片（11,12），每个磁极片具有对磁极尖端（14）逐渐变细的磁轭区域（13）和位于磁轭区域中的极靴之间的可激励线圈（16），用于产生磁通量。 极片中的一个在磁轭区域中具有槽（17），并且磁阻材料的带（20）位于槽附近。 磁阻带适于连接到感测设备，该感测设备测量响应于记录在介质上的磁通量的变化的磁阻带的电阻的变化。 可以在极片中形成多个槽，并且细长的磁阻条（42）可以位于槽附近。

    Buried servo recording system having dual transducers
    4.
    发明公开
    Buried servo recording system having dual transducers 失效
    具有双向传感器的BURIED伺服记录系统

    公开(公告)号：EP0242887A3

    公开(公告)日：1988-01-07

    申请号：EP87106964

    申请日：1983-11-02

    Applicant: NEC CORPORATION

    Inventor： Tanaka, Hideo c/o NEC Corporation

    IPC: G11B05/58 ,  G11B05/31 ,  G11B05/39 ,  G11B05/596

    CPC classification number: G11B5/3903 ,  G11B5/3103 ,  G11B5/3116 ,  G11B5/58 ,  G11B5/5965

    Abstract: The magnetic recorder has a pair of first and second transducers (5a,5b) arranged in the longitudinal direction of a record track (6). The magnetic recorder exchanges signals with a magnetic record medium (1) having a servo control signal prerecorded in a lower layer (3a) of said medium (1). A recording circuit (8) is connected to the first transducer (5a) for recording a data signal along the record track (6) in an upper layer (3b) of the medium (1). A reading circuit (9,10) is connected to one of the first and second transducers (5a,5b) for reading the recorded data signal. The second transducer (5b) is connected to a servo control circuit connected for reading the prerecorded servo control signal (12 to 15) and deriving therefrom a position error signal in response to which the position of the transducers (5a,5b) is controlled.

    Yoke type magnetic transducer head utilizing a magnetoresistance effect
    5.
    发明公开
    Yoke type magnetic transducer head utilizing a magnetoresistance effect 失效
    YOKE型磁力传感器头使用磁阻效应

    公开(公告)号：EP0204902A3

    公开(公告)日：1988-09-28

    申请号：EP86103693

    申请日：1986-03-19

    Applicant: SONY CORPORATION

    Inventor： Imakoshi, Shigeyoshi ,  Suyama, Hideo ,  Soda, Yutaka ,  Fukuyama, Munekatsu

    IPC: G11B05/39 ,  G01D05/14

    CPC classification number: G01D5/142 ,  G11B5/3903

    Abstract: A yoke tyope magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion (5) is provided so as to magnetically couple a cut-away portion in a magnetic circuit including an operation gap (g) and a magnetic yoke (8) having in its one portion the cut-away portion and in which a first bias magnetic field is applied to the magnetoresistance effect sensing portion (5) by a first magnetic flux that is generated when a current is flowed through the magnetoresistance effect sensing portion (5), or when a current is flowed through both the magnetoresistance effect Isensing portion (5) and a bias conductor (3), which includes a hard magnetic layer (14) for generating a second magnetic flux by which a second bias magnetic field is applied to the magnetoresistance effect sensing portion (5) and for passing through the magnetic yoke (8) a magnetic flux which cancels at least a part of the first magnetic flux which passes through the magnetic yoke (8).

    Two-module-head, read-after-write bi-directional tape drive
    6.
    发明公开
    Two-module-head, read-after-write bi-directional tape drive 失效
    双模头，阅读后写入双向磁带驱动器

    公开(公告)号：EP0131727A3

    公开(公告)日：1987-08-26

    申请号：EP84106171

    申请日：1984-05-30

    Applicant: International Business Machines Corporation

    Inventor： Fields, Davis Stuart, Jr.

    IPC: G11B27/36 ,  G11B15/12 ,  G11B05/008 ,  G11B05/48 ,  G11B05/265 ,  G11B05/39

    CPC classification number: G11B5/00817 ,  G11B5/4893 ,  G11B15/12 ,  G11B20/1816 ,  G11B27/36

    Abstract: A digital tape drive wherein tape is written, and a read-after-write operation is immediately performed to check the integrity of the write operation, for either direction (11, 12) of tape movement. The tape (10) contains a plurality of parallel data tracks. Two read/write head modules (14, 15) span the entire tape. The read (R) and write (W) gaps of each module are alternately spaced across the width of the tape, such that the write gaps of one module are aligned with the read gaps of the other module. When one module is selected for writing, as a function of the direction of tape movement, the other module is selected to read-after-write check the first module's written data. One module (14) writes odd-track data during one direction (11) of tape movement, and reads even-track data during the opposite direction (12) of tape movement; as the other module (15) writes even-track data during said opposite movement direction (12), and reads odd-track data during said one movement direction (11). Common read and write electronic circuits are switched between the two modules, since each module is using only one of its read and write gap multiples at any given time.

    CURRENT PERPENDICULAR-TO-THE-PLANE SPIN VALVE TYPE MAGNETORESISTIVE TRANSDUCER
    9.
    发明申请
    CURRENT PERPENDICULAR-TO-THE-PLANE SPIN VALVE TYPE MAGNETORESISTIVE TRANSDUCER 审中-公开
    当前的平面旋转阀类型磁传感器

    公开(公告)号：WO1997044781A1

    公开(公告)日：1997-11-27

    申请号：PCT/US1997008601

    申请日：1997-05-20

    Applicant: MKE-QUANTUM COMPONENTS COLORADO LLC

    Inventor： MKE-QUANTUM COMPONENTS COLORADO LLC ,  DYKES, John, West ,  KIM, Young, Keun

    IPC: G11B05/39

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3954 ,  G11B5/399 ,  G11B2005/3996

    Abstract: A transducer includes a spin valve ("SV") structure comprising a pinned ferromagnetic layer (98) adjoining a first end portion thereof and a freely rotating ferromagnetic layer (94) adjoining an oppositely disposed second end portion thereof. First and second current conductors (92, 104) adjoint the first and second end portions of the spin valve structure respectively in a current perpendicular-to-the-plane configuration ("cpp"). In a particular embodiment disclosed herein, a differential CPP transducer (120) includes a pair of SV structures (SV1, SV2) having first and second current conductors (132, 152) with a common current conductor (142) intermediate the SV structures.

    Abstract translation: 传感器包括自旋阀（“SV”）结构，其包括邻接其第一端部的钉扎铁磁层（98）和邻接其相对设置的第二端部的自由旋转铁磁层（94）。 第一和第二电流导体（92,104）分别以当前的垂直于平面的配置（“cpp”）配合自旋阀结构的第一和第二端部。 在本文公开的特定实施例中，差分CPP换能器（120）包括具有在SV结构之间的公共电流导体（142）的第一和第二电流导体（132,152）的一对SV结构（SV1，SV2）。

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