Dynamic magnetic information storage or retrieval – General recording or reproducing
Reexamination Certificate
2003-11-21
2009-06-30
Nguyen, Hoa T (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
C360S039000, C360S059000, C360S123010, C360S324120
Reexamination Certificate
active
07554757
ABSTRACT:
A write head for a magnetic storage system energizes a write coil for a plurality of bit intervals and selectively shutters the magnetic field to alter a magnetic domain of a magnetic storage medium for each bit interval. The position of the shutter may be controlled using a micro-electro mechanical system. Magnetic pole segments provide a loop between the write coil and the magnetic storage medium. Magnetic shielding on the shutter mechanisms controls the reflection of the magnetic fields. In a rewritable magnetic storage system, a first write coil generates a positive magnetic field and a second write coil generates a negative magnetic field. A shutter is associated with each write coil to selectively allow the positive or negative magnetic fields to alter the magnetic domain of the magnetic storage medium. The positive or negative magnetic fields can alter the magnetic domain in a collocated region of the magnetic storage medium to avoid jitter.
REFERENCES:
patent: 5307228 (1994-04-01), Grasty
patent: 5448434 (1995-09-01), Hirose
patent: 5500839 (1996-03-01), Miyake et al.
patent: 5701185 (1997-12-01), Reiss et al.
patent: 6226116 (2001-05-01), Dowe et al.
patent: 6411596 (2002-06-01), Nagatsuka
patent: 6567349 (2003-05-01), Nagata et al.
patent: 6667827 (2003-12-01), Ono et al.
patent: 6693768 (2004-02-01), Crue et al.
patent: 6731446 (2004-05-01), Ikeda et al.
patent: 6812055 (2004-11-01), Tamura et al.
patent: 2002/0097640 (2002-07-01), Seo et al.
patent: 2002/0118477 (2002-08-01), Ikeda et al.
Paultre, A.L., “MEMS Shutter Array to Revolutionize Optoelectronices,” Electronic Products, http://www.electronicproducts.com/ShowPage asp?SEC, downloaded on Oct. 25, 2006.
Fischer Jonathan H.
Fratti Roger A.
Rehberg John T.
Agere Systems Inc.
Mercedes Dismery E
Nguyen Hoa T
Ryan & Mason & Lewis, LLP
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