Side reading reduced GMR for high track density

Details Side reading reduced GMR for high track density Side reading reduced GMR for high track density

2007-03-12

2009-10-06

Miller, Brian E (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324110

Reexamination Certificate

active

07599158

ABSTRACT:
As track density requirements for disk drives have grown more aggressive, GMR devices have been pushed to narrower track widths to match the track pitch of the drive width. Narrower track widths degrade stability, cause amplitude loss, due to the field originating from the hard bias structure, and side reading. This problem has been overcome by adding an additional layer of soft magnetic material above the hard bias layers. The added layer provides flux closure to the hard bias layers thereby preventing flux leakage into the gap region. A non-magnetic layer must be included to prevent exchange coupling to the hard bias layers. In at least one embodiment the conductive leads are used to accomplish this. A process for manufacturing the device is also described.

REFERENCES:
patent: 5583725 (1996-12-01), Coffey et al.
patent: 5739987 (1998-04-01), Yuan et al.
patent: 5818685 (1998-10-01), Thayamballi et al.
patent: 6185078 (2001-02-01), Lin et al.
patent: 6198608 (2001-03-01), Hong et al.
patent: 6574080 (2003-06-01), Sakaguci et al.
patent: 6760966 (2004-07-01), Wang et al.
patent: 7203039 (2007-04-01), Wang et al.
patent: 7369370 (2008-05-01), Zhu
patent: 7408748 (2008-08-01), Wang et al.
patent: 08-221717 (1996-08-01), None
patent: 11-175928 (1999-07-01), None
patent: 2000-276713 (2000-10-01), None

Affiliated with

Also associated with

Rating

Side reading reduced GMR for high track density does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Side reading reduced GMR for high track density, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Side reading reduced GMR for high track density will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4132892