Supplementary shield for CPP GMR read head

Details Supplementary shield for CPP GMR read head Supplementary shield for CPP GMR read head

2006-07-11

2006-07-11

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07075758

ABSTRACT:
Increases in the AP1and AP2thickness cause the free layer to be off-center in a CPP magnetic read head. This problem has been overcome by inserting supplementary magnetic shields within the spin valve, located as close as possible to the stack. These supplementary shields enable the read gap width to be reduced by about 430 Å and the free layer to shift back towards the center by about 30 Å.

REFERENCES:
patent: 5627704 (1997-05-01), Lederman et al.
patent: 5668688 (1997-09-01), Dykes et al.
patent: 6496334 (2002-12-01), Pang et al.
patent: 6512660 (2003-01-01), Li et al.
patent: 6563679 (2003-05-01), Li et al.
patent: 6735058 (2004-05-01), Lin et al.
patent: 6765768 (2004-07-01), Saito

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