中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

29 records (took 0.017 seconds)

    MAGNETO-RESISTIVE READING/INDUCTIVE WRITING MAGNETIC HEAD ASSEMBLY AND IT MANUFACTURE
    1.
    发明专利
    MAGNETO-RESISTIVE READING/INDUCTIVE WRITING MAGNETIC HEAD ASSEMBLY AND IT MANUFACTURE 失效

    公开(公告)号：JPH10255235A

    公开(公告)日：1998-09-25

    申请号：JP31309497

    申请日：1997-11-14

    Applicant: IBM

    Inventor： CARR JEFFREY WILLIAM ,  DOVEK MORIS MUSA ,  KROUNBI MOHAMAD TOWFIK

    IPC: G11B5/255 ,  G11B5/39 ,  G11B5/60

    Abstract: PROBLEM TO BE SOLVED: To provide a magneto-resistive(MR) reading/inductive writing magnetic head assembly which is formed on a hard electrically insulated substrate to have static electricity discharging(ESD) protection property. SOLUTION: An MR head assembly 50 is preferentially composed of a hard electrically insulated substrate 52 formed of sapphire or alumina TiC, a plurality of alumina layers 54 formed on the substrate, a magneto-resistance reading/ induction writing head 56 arranged between the alumina layers, a silicon layer 58 supported by the substrate and a semiconductor circuit 60 which is built into the silicon layer to provide the static electricity discharging protection property for the head and is connected with the magneto-resistive reading/ inductive writing head. The silicon layer is epitaxially grown on the substrate when it is the sapphire substrate and joined to the substrate when it is the alumina TiC substrate. With the hard electrically insulated substrate and alumina layer, the assembly is provided with a hard air bearing surface 62 having almost uniform overlapping area and etching characteristic and excellent durability.

    4.
    发明专利
    未知

    公开(公告)号：DE68923539T2

    公开(公告)日：1996-02-29

    申请号：DE68923539

    申请日：1989-12-18

    Applicant: IBM

    Inventor： KROUNBI MOHAMAD TOWFIK ,  VOEGELI OTTO ,  WANG PO-KANG

    IPC: G11B5/39

    Abstract: A magnetoresistive (MR) read transducer comprising an MR layer (11) having passive end regions (14) separated by a central active region (12). A longitudinal bias is produced by a thin film (16) of hard magnetic material in the end regions only, and the thin film of hard magnetic material is spaced from the MR layer by a nonmagnetic spacer layer (18) so that a magnetostatic longitudinal bias is produced of a level to maintain the passive end regions of the MR layer in a stable state.

    Write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height
    7.
    发明专利
    Write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height 未知

    公开(公告)号：SG53072A1

    公开(公告)日：1998-09-28

    申请号：SG1997003462

    申请日：1997-09-19

    Applicant: IBM

    Inventor： CHANG THOMAS YOUNG ,  KROUNBI MOHAMAD TOWFIK ,  LEE EDWARD HINPONG ,  WERNER DOUGLAS JOHNSON

    IPC: G11B5/23 ,  G11B5/31 ,  G11B5/39 ,  G11B5/60

    Abstract: An inductive write head has a pole tip region between an air bearing surface (ABS) and a flare point, and a yoke region located between the flare point and a back gap. The write head includes first and second pole piece layers, wherein the second pole piece layer has first and second components. The first component extends from an ABS end, which is located at the ABS, to a recessed end which is located in the yoke region. The second component extends from a recessed end, which is spaced from the ABS, to the back gap. The second component interfaces with the first component in a stitched region so that the first component defines a pole tip in the pole tip region and the second component defines a yoke in the yoke region. A first insulation layer extends from a recessed end, which is spaced from the ABS, into the yoke region. The recessed end of the first insulation layer defines a zero throat height. The first component is sandwiched between the first insulation layer and the second component. The pole tip of the first component can be formed with well-defined side walls during a photoresist step since a flared portion of the second pole piece is located in a planar region of the first insulation layer. With this arrangement, reflective notching into the second pole piece region is avoided. Secondly, a large pedestal formed by the second pole piece provides a large region to stitch the yoke. Due to the large real estate available to stitch the yoke, its forward placement can be recessed from the ABS.

    9.
    发明专利
    未知

    公开(公告)号：DE69115939D1

    公开(公告)日：1996-02-15

    申请号：DE69115939

    申请日：1991-01-25

    Applicant: IBM

    Inventor： JU KOCHAN ,  KROUNBI MOHAMAD TOWFIK ,  WANG PO-KANG

    IPC: G11B5/33 ,  G11B5/39 ,  G11B5/58 ,  H01L43/08

    Abstract: A magnetoresistive (MR) sensor (20) is centre tapped to provide the difference signals for servo operation on data and sum signals for the data information. The centre-tap (14) of the MR sensor is made of a high resistivity material compared to the resistivity of the MR element itself such as tantalum, Nichrome and carbon. Processes which can be used to produce the high resistivity centre-tap conductor include an insulator layer to define both the track width and the centre-tap conductor and a sequence which first patterns the MR sensor and then masks to define the conductor regions.

Patent Agency Ranking