公开(公告)号：SG44410A1

公开(公告)日：1997-12-19

申请号：SG1996000218

申请日：1994-07-04

Applicant: IBM

Inventor： CHEN MAO-MIN ,  FONTANA ROBERT EDWARD ,  KROUNBI MOHAMAD TOWFIK ,  KUNG KENNETH TING-YUAN ,  LEE JAMES HSI-TANG ,  LO JYH-SHLIEY JERRY ,  TSANG CHING HWA ,  WANG PO-KANG

IPC: G11B5/39

Abstract: A magnetoresistive (MR) read transducer is disclosed having passive end regions separated by a central active region in which an MR layer is formed over substantially only the central active region and in which a magnetic bias layer is formed in each passive end region. In one embodiment, each of the magnetic bias layers includes a layer of ferromagnetic material and a layer of antiferromagnetic material overlaying and in contact with the ferromagnetic layer to provide an exchange-coupled magnetic bias field. Alternatively a hard magnetic material is used to form the biasing layer. Each of the magnetic bias layers form an abutting junction having magnetic and electrical continuity with the MR layer to produce a stable longitudinal magnetic bias field in the transducer, even when the length of the active region is small to accommodate small track widths.

公开(公告)号：SG44404A1

公开(公告)日：1997-12-19

申请号：SG1996000193

申请日：1993-02-18

Applicant: IBM

Inventor： CHEN MAO-MIN ,  JU KOCHAN ,  KROUNBI MOHAMAD T ,  TSANG CHING HWA ,  WANG PO-KANG

IPC: G11B5/39

Abstract: A magnetoresistive (MR) read transducer having passive end regions (28, 38) separated by a central active region (25, 34) comprises an MR layer (27, 31) made from a material having a low uniaxial magnetic anisotropy. A soft magnetic bias layer (24, 33) is adjacent to but spaced from the MR layer in the central region (25, 34) only, and the soft magnetic bias layer (24, 33) is made from a material having a high uniaxial magnetic anisotropy. A longitudinal bias is produced directly in each of the end regions (28, 38) only, and the means for producing the longitudinal bias comprises a layer (26) made from a material having a high uniaxial magnetic anisotropy. Control of the uniaxial anisotropy can be achieved by choosing materials of appropriate magnetostriction or intrinsic uniaxial anisotropy.

公开(公告)号：HK202396A

公开(公告)日：1996-11-15

申请号：HK202396

申请日：1996-11-07

Applicant: IBM

Inventor： GRILL ALFRED ,  HORNG CHENG TZONG ,  MEYERSON BERNARD STEELE ,  PATEL VISHNUBHAI VITTHALBHAI ,  RUSSAK MICHAEL ALLEN ,  CHANG HENRY CHINLIN ,  CHEN MAO-MIN ,  SCHWENKER ROBERT OTTO

IPC: G11B5/31 ,  G11B5/60