Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2004-05-28
2008-08-19
Wellington, Andrea (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S313000, C360S125630, C360S125220, C360S318000
Reexamination Certificate
active
07414816
ABSTRACT:
A magnetic head (slider) which requires no lapping is described. The head is fabricated with an air bearing surface that is parallel to the wafer surface. The saw cuts used to separate the individual sliders from the rest of the wafer are perpendicular to the air-bearing surface and do not pass through any critical features. The read and write components are formed from thin films disposed parallel to the air bearing surface and can be side-by-side or tandem in relation to the recording track. The stripe height of the read sensor is controlled by the deposition process rather than by lapping. Various embodiments of the read head include contiguous junction biasing, external hard magnet biasing, and in-stack biasing. In one embodiment a permeable field collector is included below the sensor layer structure. An aperture shield surrounding the sensor at the ABS is included in one embodiment.
REFERENCES:
patent: RE33949 (1992-06-01), Mallary et al.
patent: 5491606 (1996-02-01), Hesterman et al.
patent: 5673163 (1997-09-01), Cohen
patent: 5949624 (1999-09-01), Simmons et al.
patent: 6388846 (2002-05-01), Albertini et al.
patent: 7140094 (2006-11-01), Nemoto
patent: 2001/0053051 (2001-12-01), Umehara et al.
patent: 2002/0109947 (2002-08-01), Khizroev et al.
patent: 2002/0176214 (2002-11-01), Shukh et al.
patent: 2003/0053269 (2003-03-01), Nishiyama
patent: 2003/0143431 (2003-07-01), Hasegawa
patent: 2003/0151850 (2003-08-01), Nakamura et al.
patent: 2003/0227714 (2003-12-01), Parker et al.
patent: 2004/0041679 (2004-03-01), Saito et al.
patent: 2004/0218310 (2004-11-01), Nishioka
patent: 2005/0068669 (2005-03-01), Hsu et al.
Fontana, Jr. Robert E.
Ho Kuok San
Tsang Ching Hwa
Dravininkas Adam B
Hitachi Global Storage Technologies - Netherlands B.V.
Knight G. Martin
Wellington Andrea
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