Dynamic magnetic information storage or retrieval – Record medium – Disk
Reexamination Certificate
2011-07-26
2011-07-26
Evans, Jefferson (Department: 2627)
Dynamic magnetic information storage or retrieval
Record medium
Disk
Reexamination Certificate
active
07986493
ABSTRACT:
A magnetic recording medium with domain wall pinning sites including a substrate, a soft magnetic underlayer, and a magnetic recording layer overlying the soft magnetic underlayer. In one embodiment the magnetic recording layer has at least two grooves providing a track having first and second sidewalls formed by the grooves. The sidewalls provide a plurality of pinning sites formed between the sidewalls for pinning magnetic domain walls in the track. At least one of the pinning sites includes a first indentation in the first sidewall and a paired second indentation in the second sidewall. In one embodiment data can be stored within the magnetic recording layer by positioning a write head adjacent the track and inducing at least two magnetic domains defining a domain wall. The domain wall migrates to one of the pinning sites in the track.
REFERENCES:
patent: 5723033 (1998-03-01), Weiss
patent: 5739972 (1998-04-01), Smith et al.
patent: 6222702 (2001-04-01), Macken et al.
patent: 6334960 (2002-01-01), Willson et al.
patent: 6657809 (2003-12-01), Ottesen et al.
patent: 6703099 (2004-03-01), Belser
patent: 6757126 (2004-06-01), Kuroda et al.
patent: 6834005 (2004-12-01), Parkin
patent: 6898132 (2005-05-01), Parkin
patent: 6955926 (2005-10-01), Chen et al.
patent: 6970379 (2005-11-01), Parkin
patent: 7019924 (2006-03-01), McNeil et al.
patent: 7034374 (2006-04-01), Drewes
patent: 7108797 (2006-09-01), Chen et al.
patent: 7161753 (2007-01-01), Wachenschwanz et al.
patent: 2002/0012295 (2002-01-01), Asano et al.
patent: 2002/0131203 (2002-09-01), Litvinov et al.
patent: 2002/0186506 (2002-12-01), Sato et al.
patent: 2005/0271819 (2005-12-01), Wago et al.
patent: 2006/0120132 (2006-06-01), Parkin
patent: 2006/0121318 (2006-06-01), Gage et al.
patent: 2007/0262301 (2007-11-01), Cowburn et al.
patent: 2007/0278603 (2007-12-01), Ochiai et al.
patent: 2008/0278998 (2008-11-01), Cowburn et al.
patent: 2009/0040883 (2009-02-01), Kim et al.
patent: 2009/0103401 (2009-04-01), Murakami
patent: 2009/0109739 (2009-04-01), Ranjan et al.
patent: 2010/0067141 (2010-03-01), Ishibashi et al.
S. J. Graves, H. Mursoka, Y. Sugita and Y. Nakamura, “Domain Wall Pinning in Perpendicular recording media”, Digests of INTERMAG 99, 1999 IEEE International Magnetics Conferences, May 18-21, 1999, Korea.
Dieter Suess, Josef Fidler, Karina Porath, Thomas Schrefl, and Dieter Weller; “Micromagnetic Study of Pinning Behavior in Percolated Media”, Journal of Applied Physics 99, (08G905) 2006 American Institute of Physics.
B. D. Terris and T. Thomson; “Nanofabricated and Self-Assembled Magnetic Structures as Data Storage Media”, 2005 J. Phys. D: Appl. Phys. 38, R199-R222.
Stephen Y. Chou, Peter R. Krauss and Preston J. Renstrom; “Nanoimprint lithography”, J. Vac. Sci. Techno. B 154(6), Microelectronics and Nanometer Structures, 1996 American Vacuum Society, Nov./Dec. 1996, pp. 4129-4133.
Douglas J. Resnick, S. V. Sreenivasan and C. Grant Willson; “Step and Flash Imprint Lithography”, Materials Today, Feb. 2004; pp. 34-42.
Dieter Weller; “ Magnetic Recording Media Trends: Options, Issues and Potential Solutions”, Seagate Recording Media Operations, Oct. 25, 2006, MINT Center, Tuscaloosa, AL.
Klemmer Timothy J.
Lee Kim Y.
Weller Dieter
Evans Jefferson
Rego Alan G.
Seagate Technology LLC
Westman Champlin & Kelly P.A.
LandOfFree
Discrete track magnetic media with domain wall pinning sites does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Discrete track magnetic media with domain wall pinning sites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discrete track magnetic media with domain wall pinning sites will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2653181