公开(公告)号：SG43718A1

公开(公告)日：1997-11-14

申请号：SG1996000137

申请日：1993-02-08

Applicant: IBM

Inventor： JU KOCHAN ,  KROUNBI MOHAMAD T

IPC: G11B5/31

Abstract: A thin film magnetic head comprises a first magnetic yoke layer (12) extending from a back gap region to a sensing edge such as an air bearing surface (ABS), and a second magnetic yoke layer (22) contacting the first magnetic yoke layer at the back gap region and extending to the ABS in a position aligned with, but spaced from, the first magnetic yoke layer (12). A pole tip structure (15), with geometry formed by a single photolithographic process, comprising a first pole tip layer (16), a gap forming layer (18), and a second pole tip layer (20) is positioned between the first and second magnetic yoke layers at the ABS with the first pole tip layer in contact with the first magnetic yoke layer and the second pole tip layer in contact with the second magnetic yoke layer at the ABS.

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.

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：DE69302725T2

公开(公告)日：1996-11-28

申请号：DE69302725

申请日：1993-02-08

Applicant: IBM

Inventor： JU KOCHAN ,  KROUNBI MOHAMAD T

IPC: G11B5/31

Abstract: A thin film magnetic head comprises a first magnetic yoke layer (12) extending from a back gap region to a sensing edge such as an air bearing surface (ABS), and a second magnetic yoke layer (22) contacting the first magnetic yoke layer at the back gap region and extending to the ABS in a position aligned with, but spaced from, the first magnetic yoke layer (12). A pole tip structure (15), with geometry formed by a single photolithographic process, comprising a first pole tip layer (16), a gap forming layer (18), and a second pole tip layer (20) is positioned between the first and second magnetic yoke layers at the ABS with the first pole tip layer in contact with the first magnetic yoke layer and the second pole tip layer in contact with the second magnetic yoke layer at the ABS.

公开(公告)号：DE69302725D1

公开(公告)日：1996-06-27

申请号：DE69302725

申请日：1993-02-08

Applicant: IBM

Inventor： JU KOCHAN ,  KROUNBI MOHAMAD T

IPC: G11B5/31

Abstract: A thin film magnetic head comprises a first magnetic yoke layer (12) extending from a back gap region to a sensing edge such as an air bearing surface (ABS), and a second magnetic yoke layer (22) contacting the first magnetic yoke layer at the back gap region and extending to the ABS in a position aligned with, but spaced from, the first magnetic yoke layer (12). A pole tip structure (15), with geometry formed by a single photolithographic process, comprising a first pole tip layer (16), a gap forming layer (18), and a second pole tip layer (20) is positioned between the first and second magnetic yoke layers at the ABS with the first pole tip layer in contact with the first magnetic yoke layer and the second pole tip layer in contact with the second magnetic yoke layer at the ABS.