Phase servo patterns for bit patterned media

Details Phase servo patterns for bit patterned media Phase servo patterns for bit patterned media

2011-04-05

2011-04-05

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S049000

Reexamination Certificate

active

07920354

ABSTRACT:
A recordable medium according to some embodiments includes a servo control field having a bit patterned media (BPM) pattern. The pattern includes a plurality of isolated magnetic islands or dots arranged in a down-track orientation and in a cross-track orientation. A phase of dots arranged on the medium in the servo control field varies in a first cross-track direction. The dots arranged on the medium may include a first phase pattern that has a first phase gradient in the first cross-track direction and a second phase pattern that has a second phase gradient, different from the first phase gradient, in the first cross-track direction. The dots may include a plurality of dot composites including a plurality of dots.

REFERENCES:
patent: 4549232 (1985-10-01), Axmear et al.
patent: 4912576 (1990-03-01), Janz
patent: 5063546 (1991-11-01), Ito et al.
patent: 5420760 (1995-05-01), Ansell et al.
patent: 5452285 (1995-09-01), Monen
patent: 5473480 (1995-12-01), Ishida
patent: 5590009 (1996-12-01), Ishida
patent: 5615065 (1997-03-01), Cheung
patent: 6049438 (2000-04-01), Serrano et al.
patent: 6051299 (2000-04-01), Uchiyama et al.
patent: 6162532 (2000-12-01), Black et al.
patent: 6304398 (2001-10-01), Gaub et al.
patent: 6440520 (2002-08-01), Baglin et al.
patent: 6529341 (2003-03-01), Ishida et al.
patent: 6535343 (2003-03-01), Bar-Gadda
patent: 6628598 (2003-09-01), Edwards et al.
patent: 6775081 (2004-08-01), Ottesen et al.
patent: 6810004 (2004-10-01), Sako
patent: 6999279 (2006-02-01), Lundstrom
patent: 7009791 (2006-03-01), Shimatani
patent: 7119975 (2006-10-01), Blaum et al.
patent: 7167329 (2007-01-01), Baker
patent: 7231731 (2007-06-01), Muramatsu et al.
patent: 7236325 (2007-06-01), Albrecht et al.
patent: 7265922 (2007-09-01), Biskeborn et al.
patent: 7307807 (2007-12-01), Han et al.
patent: 7307808 (2007-12-01), Kaizu et al.
patent: 7365933 (2008-04-01), Hamaguchi et al.
patent: 7443622 (2008-10-01), Kaizu et al.
patent: 7443626 (2008-10-01), Asakura et al.
patent: 7492540 (2009-02-01), Albrecht
patent: 7522506 (2009-04-01), Fasen
patent: 7643234 (2010-01-01), Albrecht et al.
patent: 2006/0215310 (2006-09-01), Zayas
patent: 2007/0258161 (2007-11-01), Richter et al.
patent: 2007/0281078 (2007-12-01), Kikitsu et al.

Affiliated with

Also associated with

Rating

Phase servo patterns for bit patterned media does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase servo patterns for bit patterned media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase servo patterns for bit patterned media will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2655065