CPP spin valve head with bias point control

Details CPP spin valve head with bias point control CPP spin valve head with bias point control

2005-03-29

2005-03-29

Cao, Allen (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

06873501

ABSTRACT:
High sensitivity in a CPP spin valve has been achieved by providing an extended free layer while maintaining good bias point control and edge domain control through use of exchange coupling with the whole free layer. In a second embodiment of the invention, a second spin valve is added so that the free layer receives filtered electrons from two directions. Processes to manufacture both embodiments are also described.

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Matsuzono et al., “Study on Requirements for Shielded Current Perpendicular to the Plane Spin Valve Heads Based on Dynamic Read Tests”, Journal of Applied Physics, vol. 91, No. 10, May 15, 2002, pp. 7267-7269.
HT-01-053, filed Sep. 10, 2002, Serial# 10/238,269, “CPP and MTJ Reader Design with Continuous Exchange-Coupled Free Layer”.

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