Head for perpendicular recording with reduced erasure

Details Head for perpendicular recording with reduced erasure Head for perpendicular recording with reduced erasure

2007-06-19

2007-06-19

Cao, Allen (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

10737491

ABSTRACT:
A perpendicular writer of the present invention comprises a main pole connected to two return poles and further includes one or more shorting shields thereby reducing erasure field on double layer perpendicular media. The perpendicular writer may include side shorting shields connecting the first and second return poles thereby modifying the crosstrack field gradient. Additionally, the perpendicular writer may include a top shorting shield modifying the downtrack gradient and may additionally include a bottom shorting shield for further reduction of erasure fields. The distance between the main pole and the shorting shields may be modified to customize the write field gradient.

REFERENCES:
patent: 4413297 (1983-11-01), Tanaka et al.
patent: 4731157 (1988-03-01), Lazzari
patent: 5196976 (1993-03-01), Lazzari
patent: 6513228 (2003-02-01), Khizroev et al.
patent: 6728065 (2004-04-01), Batra et al.
patent: 6807027 (2004-10-01), McGeehin et al.
patent: 6842313 (2005-01-01), Mallary
patent: 6954340 (2005-10-01), Shukh et al.
patent: 7008548 (2006-03-01), Chae et al.
patent: 7009812 (2006-03-01), Hsu et al.
patent: 7042682 (2006-05-01), Hu et al.
patent: 7054106 (2006-05-01), Kudo et al.
patent: 7102854 (2006-09-01), Wang et al.
patent: 2001/0017746 (2001-08-01), Nishida et al.
patent: 2002/0036871 (2002-03-01), Yano et al.
patent: 2002/0071208 (2002-06-01), Batra et al.
patent: 2003/0002211 (2003-01-01), Tsuchiya et al.
patent: 2003/0039064 (2003-02-01), Khizroev et al.
patent: 2004/0201918 (2004-10-01), Guan et al.
patent: 2004/0264034 (2004-12-01), Watanabe et al.
patent: 2005/0068670 (2005-03-01), Amin et al.
patent: 2005/0068678 (2005-03-01), Hsu et al.
M.L. Plumer, J. van Ek, D. Weller (Eds.); M. Mallary, The Physics of Ultra-High-Density Magnetic Recording, Springer Series in Surface Sciences, 2001, pp. 315-348.
Kiyoshi Yamakawa, Kaori Taguchi, Kazuyuki Ise, Naoki Honda, and Kazuhiro Ouchi; Single=pole recording head design for 100 Gbpsi perpendicular magnetic recording; Journal of Magnetism and Magnetic Materials 235 (2001); pp. 354-361.
M. Mallary, A. Torabi, and M. Benakli; One Terabit per Square Inch Perpendicular Recording Conceptual Design, IEEE Transactions on Magnetics, vol. 38, No. 4, pp. 1719-1724, 2002.

Affiliated with

Also associated with

Rating

Head for perpendicular recording with reduced erasure does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3880006