CPP with elongated pinned layer

Coating processes – Magnetic base or coating

Reexamination Certificate

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Details

C427S131000, C427S282000, C427S402000, C360S324100, C360S324110

Reexamination Certificate

active

07919139

ABSTRACT:
CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.

REFERENCES:
patent: 5576914 (1996-11-01), Rottmayer et al.
patent: 5668688 (1997-09-01), Dykes et al.
patent: 5739987 (1998-04-01), Yuan et al.
patent: 6084752 (2000-07-01), Sakakima et al.
patent: 6219205 (2001-04-01), Yuan et al.
patent: 2005/0102820 (2005-05-01), Chang et al.
patent: 2005/0111143 (2005-05-01), Chang et al.
patent: 2005/0111148 (2005-05-01), Li et al.
patent: 2006/0002032 (2006-01-01), Li et al.
patent: 2006/0094129 (2006-05-01), Pinarbasi
“A New Design for an Ultra-High Density Magnetic Recording Head Using a GMR Sensor in the CPP Mode,” by Rottmayer et al., IEEE Transaactions on Magnetics, vol. 31, No. 6, Nov. 1995, pp. 2597-2599.
“Microscopic mechanisms of giant magnetoresistance,” by C. Vouille et al., Physical Review B, vol. 60, No. 9, Sep. 1, 1999-I, 1999 The American Physical Society, pp. 6710-6722.

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