Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2007-02-20
2007-02-20
Castro, Angel A. (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
09513873
ABSTRACT:
A method for forming a laminated shield to improve the stability and performance of an MR read head and the MR read head formed using that shield. The shield consists of two layers of ferromagnetic material separated by a layer of ruthenium, allowing the ferromagnetic layers to form an antiferromagnetic configuration by means of a quantum mechanical exchange interaction. The antiferromagnetic configuration has a stable domain structure and a magnetization that forms closed loops around the shield edges thereby reducing noise in the readback signal and reducing disturbances to the magnetic state of the sensor element.
REFERENCES:
patent: 5103553 (1992-04-01), Mallary
patent: 5108837 (1992-04-01), Mallary
patent: 5621592 (1997-04-01), Gill et al.
patent: 5838521 (1998-11-01), Ravipati
patent: 6233116 (2001-05-01), Chen et al.
patent: 6259583 (2001-07-01), Fontana et al.
patent: 6275360 (2001-08-01), Nakamoto et al.
patent: 6292334 (2001-09-01), Koike et al.
patent: 6437949 (2002-08-01), Macken et al.
patent: 6456467 (2002-09-01), Mao et al.
patent: 6496335 (2002-12-01), Gill
Horng Cheng T.
Ju Kochan
Li Min
Liao Simon H.
Ackerman Stephen B.
Castro Angel A.
Headway Technologies Inc.
Saile Ackerman LLC
LandOfFree
Shield structure design to improve the stability of an MR head does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shield structure design to improve the stability of an MR head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shield structure design to improve the stability of an MR head will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3843878