Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-02-14
2009-12-08
Evans, Jefferson (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S324120
Reexamination Certificate
active
07630177
ABSTRACT:
In a tunnel magnetoresistive (TMR) device, free sublayers are separated by an intermediate spacer layer that serves to ensure a uniform circumferential magnetization in the free stack, counterbalancing orange-peel coupling by antiferromagnetic exchange coupling. Thus, a CPP MR device may have a seed stack, a pinned stack on the seed stack, and a tunnel barrier on the pinned stack. A free stack can be on the tunnel barrier, and the free stack can include structure for promoting uniform circumferential magnetization in the free stack.
REFERENCES:
patent: 5032945 (1991-07-01), Argyle et al.
patent: 5483403 (1996-01-01), Voegeli
patent: 5587943 (1996-12-01), Torok et al.
patent: 5696654 (1997-12-01), Gill et al.
patent: 5905611 (1999-05-01), Yoda et al.
patent: 6166948 (2000-12-01), Parkin et al.
patent: 6358757 (2002-03-01), Anthony
patent: 6455177 (2002-09-01), Everitt et al.
patent: 6750491 (2004-06-01), Sharma et al.
patent: 6819530 (2004-11-01), Gill
patent: 6865109 (2005-03-01), Covington
patent: 7035062 (2006-04-01), Mao et al.
patent: 2003/0206384 (2003-11-01), Hoshiya et al.
patent: 2003/0214763 (2003-11-01), Childress et al.
patent: 2004/0057162 (2004-03-01), Gill
patent: 2004/0057164 (2004-03-01), Parker et al.
patent: 2004/0109264 (2004-06-01), Gill
patent: 2004/0150901 (2004-08-01), Hiebert et al.
patent: 2005/0045931 (2005-03-01), Min et al.
patent: 2001230469 (2001-08-01), None
patent: 2003263708 (2003-09-01), None
A.V. Pohm, J.M. Anderson, R.S. Beech, and J.M. Daughton; “Exchange Coupling and Edge Pinning in Vertical Head Sensors”, IEEE Transactions on Magnetics, vol. 37, No. 4, Jul. 2001.
John M. Anderson, Arthur V. Pohm; “Ultra-low Hysteresis and Self-Biasing in GMR Sandwich Sendor Elements”, IEEE Transactions on Magnetics, vol. 37, No. 4, Jul. 2001.
Beach Robert Stanley
Heim David Eugene
Nikitin Vladimir
Seagle David John
Evans Jefferson
Hitachi Global Storage Technologies - Netherlands B.V.
Rogitz John L.
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