公开(公告)号：MY121197A

公开(公告)日：2006-01-28

申请号：MYPI9401782

申请日：1994-07-08

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 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 LAYERS IS FORMED IN EACH PASSIVE END REGION. 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. EACH OF THE MAGNETIC BIAS LAYERS FORM AN ABUTTING JUNCTION HAVING MAGNETIC AND ELECTRICALLY CONTINUITY WITH THE MR LAYER TO PRODUCE A LONGITUDINAL MAGNETIC BIAS FIELD IN THE TRANSDUCER. FIG 2

公开(公告)号：DE69420789T2

公开(公告)日：2000-04-27

申请号：DE69420789

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：DE69420789D1

公开(公告)日：1999-10-28

申请号：DE69420789

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：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.