公开(公告)号：JPH1091923A

公开(公告)日：1998-04-10

申请号：JP21464497

申请日：1997-08-08

Applicant: IBM

Inventor： GILL HARDAYAL SINGH ,  GURNEY BRUCE A ,  SMYTH JOSEPH FRANCIS ,  SPERIOSU VIRGIL SIMON ,  WERNER DOUGLAS JOHNSON

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/39

Abstract: PROBLEM TO BE SOLVED: To provide an orthogonal spin valve reading head having a spin valve sensor. SOLUTION: Spin valve sensors are arranged between a first and a second shield layers S1, S2 asymmetrically, when a detecting current is made to flow, a restriction magnetic fields by an anti-ferroelectric layer 74, a pin holding layer 72 and a spacer layer 76 partially or completely canceled by an induction magnetic field generated by a current induced in both shield layers when a detecting current is made to flow. The distance between a sensor and the second shield layer S2 is enlarged by providing an intermediate gap layer MG between spin valve sensors and the second shield layer S2.

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.

公开(公告)号：SG32332A1

公开(公告)日：1996-08-13

申请号：SG1995000248

申请日：1995-04-12

Applicant: IBM

Inventor： WERNER DOUGLAS JOHNSON ,  FENG JOSEPH SHAO-YING ,  KROUNBI MOHAMAD TOWFIK

IPC: G11B5/39