Thin film magnetic head and magnetic recording apparatus

Details Thin film magnetic head and magnetic recording apparatus Thin film magnetic head and magnetic recording apparatus

2007-05-15

2007-05-15

Klimowicz, William J (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

C360S317000

Reexamination Certificate

active

10798363

ABSTRACT:
A thin film magnetic head capable of preventing unintentional erasing of information during non-recording, ensuring its magnetic operating characteristics with stability. A top read shield layer extends rearward relative to a back gap (or a back-gap rear-end position), and a write shield layer also extends rearward relative to the back gap. Thus, a stray external magnetic field generated from a voice coil motor or the like is more likely to be taken in by not only the top read shield layer but also the write shield layer; the stray external magnetic field is less likely to converge on the top read shield layer. This reduces the likelihood of an undesired magnetic closed loop being formed between the top read shield layer and magnetic pole layer and a recording medium, and thus reduces the likelihood of unintentional overwriting of information taking place during non-recording due to the undesired magnetic closed loop.

REFERENCES:
patent: 4656546 (1987-04-01), Mallory
patent: 5073836 (1991-12-01), Gill et al.
patent: 6101067 (2000-08-01), Matsuzono et al.
patent: 6785097 (2004-08-01), Okada et al.
patent: 6804088 (2004-10-01), Nonaka et al.
patent: 7099121 (2006-08-01), Parker et al.
patent: 2001/0017751 (2001-08-01), Miyazaki et al.
patent: 2002/0093772 (2002-07-01), Yoshida et al.
patent: 2003/0043513 (2003-03-01), Lin
patent: 2003/0223149 (2003-12-01), Kimura et al.
patent: 0 360 978 (1990-04-01), None
patent: 64-048217 (1989-02-01), None
patent: 2001176031 (2001-06-01), None
patent: A 2001-250204 (2001-09-01), None
patent: 2002-092820 (2002-03-01), None
patent: A 2004-281023 (2004-10-01), None
patent: A 2004-342164 (2004-12-01), None
M. Mallary et al; “One Terabit per Square Inch Perpendicular Recording Conceptual Design”; IEEE Transactions on Magnetics, vol. 38, No. 4; Jul. 2002; pp. 1719-1724.

Affiliated with

Also associated with

Rating

Thin film magnetic head and magnetic recording apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thin film magnetic head and magnetic recording apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thin film magnetic head and magnetic recording apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3823006