公开(公告)号：WO1998016921A1

公开(公告)日：1998-04-23

申请号：PCT/US1997018245

申请日：1997-10-09

Applicant: SEAGATE TECHNOLOGY, INC. ,  MOWRY, Gregory, S. ,  FERNANDEZ-DE-CASTRO, Juan, J. ,  DING, Juren

Inventor： SEAGATE TECHNOLOGY, INC.

IPC: G11B05/39

CPC classification number: G11B5/3912 ,  G11B5/3903 ,  G11B5/3967

Abstract: A transducing head (70) has a magnetoresistive read head with an air-bearing surface. The magnetoresistive read head includes a magnetoresistive sensor (77) having an active area (79) and a shield (76, 94, 96, 98) encircling the active area (79) of the magnetoresistive sensor (77) in a plane substantially parallel to the air-bearing surface of the read head.

Abstract translation: 转换头（70）具有具有空气轴承表面的磁阻读取头。 磁阻读取头包括具有有源区域（79）的磁阻传感器（77）和围绕磁阻传感器（77）的有源区域（79）的屏蔽层（76,94,96,98），该平面基本上平行于 读头的空气轴承表面。

公开(公告)号：WO1997011458A1

公开(公告)日：1997-03-27

申请号：PCT/JP1995001887

申请日：1995-09-20

Applicant: HITACHI, LTD. ,  TADAKORO, Shigeru ,  KAMIO, Hiroshi ,  IMAGAWA, Takao ,  NARISHIGE, Shinji ,  MORIJIRI, Makoto

Inventor： HITACHI, LTD.

IPC: G11B05/39

CPC classification number: G11B5/3932 ,  G11B5/399

Abstract: A magnetoresistive head comprising a magnetic sensor having a magnetoresistive ferromagnetic film, which includes tapered portions at both ends of a signal detection region. A ferromagnetic foundation film is formed on the taper portion of the magnetic sensor as a film for applying a vertical bias magnetic field to the magnetic sensor, and a permanent magnet film is formed on this foundation film. The permanent magnet film applies the vertical bias magnetic field to the signal detection region, and when coming into contact with the taper portion of the magnetic sensor through the ferromagnetic foundation film, it couples with the ferromagnetic film constituting the magnetic sensor in a magnetic exchange mode. Accordingly, magnetic characteristics of the permanent magnet film for applying the vertical bias magnetic field of the magnetoresistive head can be improved.

Abstract translation: 磁阻头包括具有磁阻铁磁膜的磁传感器，该磁传感器在信号检测区域的两端包括锥形部分。 在磁传感器的锥形部分上形成铁磁基底膜作为向磁传感器施加垂直偏置磁场的膜，并在该基底膜上形成永磁体膜。 永磁体膜将垂直偏置磁场施加到信号检测区域，并且当通过铁磁性基膜与磁性传感器的锥形部分接触时，其与构成磁性传感器的铁磁膜耦合在磁交换模式 。 因此，可以提高用于施加磁阻磁头的垂直偏置磁场的永磁体膜的磁特性。

公开(公告)号：WO1994027288A1

公开(公告)日：1994-11-24

申请号：PCT/IB1994000098

申请日：1994-05-09

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  MITCHELL, Terry ,  TOLMAN, Charles ,  GEORGE, Peter, K. ,  MOWRY, Gregory, S.

IPC: G11B05/39

CPC classification number: G11B5/3958 ,  G11B5/3967 ,  G11B5/398

Abstract: The invention relates to a magnetoresistive read element and a thin film magnetic head incorporating the same. The magnetoresistive element (200) comprises an elongated main body portion (220) which includes the central or active region of the element, elongated neck portions (240, 260) at each end of the main body portion, transition regions (280, 300) connecting the main body portion with the neck portions, and at least two arm portions (320, 340), each connected to a neck at an angle to the longitudinal axis (L) of the main body. In a magnetoresistive read element having this shape a single magnetic domain is maintained in the central region during reading, thereby avoiding Barkhausen noise. An integrated thin film magnetic head structure may comprise a plurality of thin film magnetic heads arranged on a single substrate, each head incorporating the magnetoresistive element.

Abstract translation: 本发明涉及一种磁阻读取元件和结合其的薄膜磁头。 磁阻元件（200）包括细长的主体部分（220），其包括元件的中心或有源区域，在主体部分的每个端部处的细长颈部（240,260），过渡区域（280,300） 将所述主体部分与所述颈部部分连接，以及至少两个臂部分（320,340），其各自与所述主体的纵向轴线（L）成角度地连接到颈部。 在具有这种形状的磁阻读取元件中，在读取期间在中心区域保持单个磁畴，从而避免了巴克豪森噪声。 集成薄膜磁头结构可以包括布置在单个基板上的多个薄膜磁头，每个磁头都包含磁阻元件。

公开(公告)号：WO1993012519A1

公开(公告)日：1993-06-24

申请号：PCT/US1992010645

申请日：1992-12-10

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  SCHWARZ, Theodore, A. ,  BISCHOFF, Peter, G. ,  LEUNG, Chak, M. ,  CHEN, Johnny, C. ,  THAYAMBALLI, Pradeep

IPC: G11B05/39

CPC classification number: G11B5/3912 ,  G11B5/3961

Abstract: A thin-film magnetoresistive playback head (10), having films (16 and 28) providing magnetic shielding and magnetic bias. At least one of the magnetic shield layers is also conductive so that the functions of shielding and biasing are combined. Preferably, both shield layers are conductive. A multiple element channel head is disclosed in which the magnetic/conductive layers extend in series from one transducer section to the next, allowing a single bias current to bias all of the sections.

公开(公告)号：WO1990007773A1

公开(公告)日：1990-07-12

申请号：PCT/US1989005644

申请日：1989-12-18

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  SMITH, Neil

IPC: G11B05/39

CPC classification number: G11B5/3903 ,  H01F7/02

Abstract: The invention teaches modifying the shape of a bar magnet (30, 94) which is uniformly magnetized either in the direction of its height (42) or width (96) to increase the volume of magnetic material at each end of the magnet (30, 94). This results in increased magnetic field contribution from the magnet ends which modifies the field direction at the magnet faces so that the field lines converge rather than diverge just as they enter and leave the central portion of the magnet (30, 94). Further along the field direction, the field lines change from being convergent to again being divergent, as is the usual case for a conventional bar magnet. Because of this transition there is an extended region (56, 112) over which the field lines are effectively straight and parallel, i.e. the field is uniform. This uniformity has been attained without increasing the length of the magnet (30, 94), and a bar magnet so modified according to the teaching of the invention is suitable for the uniform biaising of MR elements (62, 64, 66) in a single track or in a multitrack head.

公开(公告)号：WO1990007179A1

公开(公告)日：1990-06-28

申请号：PCT/US1989005584

申请日：1989-12-14

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  SMITH, Neil

IPC: G11B05/39

CPC classification number: G11B5/398 ,  G01R33/09 ,  H01F10/00 ,  Y10T428/12951

Abstract: The present invention provides increased stabilization of the magnetization of a single domain thin magnetic film (62) over that attainable in the rectangular thin film (16) known in the prior art by shaping the magnetic film (62) as a rhomboid rather than as a rectangle. Practice of the invention teaches angling the transverse sides (68, 70) of the film with respect to the longitudinal sides (64, 66) either at an angle (63) equal to, or smaller than, the angle (72) at the bias point of the magnetization (74) with respect to the direction of the easy axis (51), as established by an external bias field (76). Under these conditions the biased magnetization (74) of the film (62), being either parallel to, or at a positive angle with respect to the transverse sides (68, 70) of the rhomboid, either generates no charges at the transverse edges (68, 70) of the film, or actually generates charges (82, 84) which produce a field parallel to the longitudinal component of the magnetization (74) which stabilizes the magnetization (74) of the single domain rather than destabilizes it.