Magnetic head for perpendicular recording with suppressed...

Details Magnetic head for perpendicular recording with suppressed... Magnetic head for perpendicular recording with suppressed...

2003-06-11

2009-06-30

Davis, David D (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07554765

ABSTRACT:
A magnetic head for perpendicular recording having reduced side writing and erasing is disclosed. The writer portion of the magnetic head includes a main pole and a return pole. The main pole includes a multilayer main pole tip and a multilayer yoke. The layers of the main pole tip and the yoke are antiferromagnetically coupled to each other with a non-magnetic metal. Antiferromagnetic coupling between the layers of the main pole tip and the yoke dramatically reduces fringing flux emanated from the sides of the main pole intending to close through an upper portion of the return pole. A biasing antiferromagnetic layer is coupled to the upper portion of the return pole to bias the return pole parallel to the air bearing surface. This prevents or reduces the effect of domain wall formation in the return pole, which results in further reduction in side writing and erasing.

REFERENCES:
patent: 5157570 (1992-10-01), Shukovsky et al.
patent: 5388019 (1995-02-01), Argyle et al.
patent: 5792547 (1998-08-01), Liu et al.
patent: 6122144 (2000-09-01), Chang et al.
patent: 6233116 (2001-05-01), Chen et al.
patent: 6282056 (2001-08-01), Feng et al.
patent: 6791796 (2004-09-01), Shukh et al.
patent: 2002/0071208 (2002-06-01), Batra et al.
patent: 2002/0176214 (2002-11-01), Shukh et al.
patent: 2003/0026039 (2003-02-01), Okada et al.

Affiliated with

Also associated with

Rating

Magnetic head for perpendicular recording with suppressed... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic head for perpendicular recording with suppressed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic head for perpendicular recording with suppressed... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4111427