Process for manufacturing a top spin valve

Details Process for manufacturing a top spin valve Process for manufacturing a top spin valve

2006-06-13

2006-06-13

Talbot, Brian K. (Department: 1762)

Coating processes

Magnetic base or coating

Magnetic coating

C427S128000, C029S603130, C029S603140

Reexamination Certificate

active

07060321

ABSTRACT:
Currently, the shield-to-shield separation of a spin valve head cannot be below about 800 Å, mainly due to sensor-to-lead shorting problems. This problem has now been overcome by inserting a high permeability, high resistivity, thin film shield on the top or bottom (or both) sides of the spin valve sensor. A permeability greater than about 500 is required together with a resistivity about 5 times greater than that of the free layer and an MrT value for the thin film shield that is 4 times greater than that of the free layer. Five embodiments of the invention are described.

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