Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2005-10-28
2009-02-03
Cao, Allen T (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07486485
ABSTRACT:
Embodiments of the invention prevent a decrease in magnetization or demagnetization from occurring to recording magnetization regardless of a direction in which a stray field is applied. In one embodiment, an apparatus for data storage system comprises a head having a magnetic field shield in the vicinity of a main pole, and a cover of the device, using a constituent material with a magnetic field shielding effect, across the cover, or at part thereof. When a stray field in a direction perpendicular to a recording medium is applied, the effect of the magnetic field is alleviated by the magnetic field shield installed in the vicinity of the main pole. In such a case, it need only be sufficient to form the magnetic field shield in a shape optimum for removing the stray field in the perpendicular direction only. When a stray field in a direction horizontal in relation to the recording medium is applied, the magnetic field acting on the recording medium is removed by the cover of the device comprising a magnetic component.
REFERENCES:
patent: 6710972 (2004-03-01), Mochizuki et al.
patent: 6791796 (2004-09-01), Shukh et al.
patent: 7145750 (2006-12-01), Kimura et al.
patent: 7180704 (2007-02-01), Mochizuki et al.
patent: 2002/0036871 (2002-03-01), Yano et al.
patent: 2004/0159012 (2004-08-01), Kawato et al.
patent: 2005/0207061 (2005-09-01), Mochizuki et al.
patent: 2005/0213244 (2005-09-01), Mochizuki et al.
patent: 2006/0002018 (2006-01-01), Fukui et al.
patent: 2006/0082931 (2006-04-01), Fukui et al.
patent: 05-210826 (1993-08-01), None
patent: 06-084120 (1994-03-01), None
patent: 07-307002 (1995-11-01), None
patent: 2002-197619 (2002-07-01), None
patent: 2003-045008 (2003-02-01), None
patent: 2003-077266 (2003-03-01), None
patent: 2004-047110 (2004-02-01), None
patent: 2004-095177 (2004-03-01), None
Hamaguchi Takehiko
Kamo Yoshihisa
Maeda Hideaki
Shimizu Yukiya
Tagawa Ikuya
Cao Allen T
Hitachi Global Storage Technologies - Netherlands B.V.
Nader Rambod
Townsend and Townsend / and Crew LLP
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