Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2005-10-17
2009-06-02
Chen, Tianjie (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07542244
ABSTRACT:
Embodiments of the invention provide a magnetic head (magnetic disk storage) which does not erase data on a recording medium even when a stray field is applied. In one embodiment, the head has a structure that d1<t1and d2<t2are satisfied where d1denotes the positional difference between edges of an auxiliary pole and an upper shield in the cross-track direction, d2denotes the positional difference between edges of the upper shield and a lower shield in the cross-track direction, t1the film thickness of the auxiliary pole or upper shield, whichever magnetic layer is larger in cross-track width, and t2the film thickness of the upper shield or lower shield, whichever magnetic layer is larger in cross-track width.
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Fukui Hiroshi
Maruyama Yoji
Mochizuki Masafumi
Okada Tomohiro
Chen Tianjie
Hitachi Global Storage Technologies - Netherlands B.V.
Nader Rambod
Townsend and Townsend / and Crew LLP
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