Flux shunt structure for reducing return pole corner fields...

Details Flux shunt structure for reducing return pole corner fields... Flux shunt structure for reducing return pole corner fields...

2005-04-27

2009-12-29

Blouin, Mark (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07639450

ABSTRACT:
A magnetic head for use in a perpendicular recording system having a novel shield structure that provides exceptional magnetic shielding from extraneous magnetic fields such as from a write coil, shaping layer or return pole of the write head. The magnetic head includes a write pole, a return pole and a magnetic shield that is magnetically connected with the return pole near the ABS and extends toward the write pole. The shield is formed with a notch at its edge closest to the write pole. The notch assures adequate physical, magnetic, and electrical separation between the write pole and the shield, while allowing un-notched portions of the shield to provide additional magnetic shielding.

REFERENCES:
patent: 4317148 (1982-02-01), Chi
patent: 4489484 (1984-12-01), Lee
patent: 4656546 (1987-04-01), Mallory
patent: 4672494 (1987-06-01), Furuya et al.
patent: 4731157 (1988-03-01), Lazzari
patent: 4849841 (1989-07-01), Sokolik
patent: 4935832 (1990-06-01), Das et al.
patent: 5075956 (1991-12-01), Das
patent: RE33949 (1992-06-01), Mallary et al.
patent: 5196976 (1993-03-01), Lazzari
patent: 5345354 (1994-09-01), Ito et al.
patent: 5408373 (1995-04-01), Bajorek et al.
patent: 5414783 (1995-05-01), Bov, Jr. et al.
patent: 5530776 (1996-06-01), Bov, Jr. et al.
patent: 5543989 (1996-08-01), Westwood
patent: 5550691 (1996-08-01), Hamiton
patent: 6477002 (2002-11-01), Mizoh
patent: 6531202 (2003-03-01), Litvinov et al.
patent: 6721129 (2004-04-01), Lam
patent: 6728065 (2004-04-01), Batra et al.
patent: 6785092 (2004-08-01), Covington et al.
patent: 6842313 (2005-01-01), Mallary
patent: 6888700 (2005-05-01), Litvinov et al.
patent: 6954340 (2005-10-01), Shukh et al.
patent: 7002775 (2006-02-01), Hsu et al.
patent: 7042682 (2006-05-01), Hu et al.
patent: 7099121 (2006-08-01), Parker et al.
patent: 7120988 (2006-10-01), Le et al.
patent: 7265941 (2007-09-01), Le et al.
patent: 7322095 (2008-01-01), Guan et al.
patent: 2002/0048126 (2002-04-01), Shimazawa
patent: 2002/0176214 (2002-11-01), Shukh et al.
patent: 2003/0021063 (2003-01-01), Kuroda et al.
patent: 2003/0117749 (2003-06-01), Shukh et al.
patent: 2003/0227714 (2003-12-01), Parker et al.
patent: 2004/0218312 (2004-11-01), Matono
patent: 2005/0068678 (2005-03-01), Hsu et al.
patent: 2005/0083605 (2005-04-01), Hu et al.
E. Leung, M. Hayashi, R. Leung, K. Ino, N. Matono, S. Takahashi, M. Fujita, “Writer Performance Improvement in MR Head With Oversized Trailing Poles Technique,” Magnetics, IEEE Transactions on, vol. 34, Issue 4, Jul. 1998.
European Search Report from European Application No. 06251318.9 which was mailed on Jul. 14, 2006.

Affiliated with

Also associated with

Rating

Flux shunt structure for reducing return pole corner fields... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flux shunt structure for reducing return pole corner fields..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flux shunt structure for reducing return pole corner fields... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4067246