Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic head
Reexamination Certificate
2005-12-27
2005-12-27
Bernatz, Kevin M. (Department: 1773)
Stock material or miscellaneous articles
Magnetic recording component or stock
Magnetic head
C428S811500, C360S324120
Reexamination Certificate
active
06979500
ABSTRACT:
A magnetic sensing element is provided, in which magnetization of a free magnetic layer is likely to fluctuate when the track width is further reduced, and thereby, the magnetic field detection sensitivity can be improved. A second free magnetic layer having a dimension W2 in the track-width direction is laminated on a first free magnetic layer having a dimension W1 in the track-width direction while the dimension W2 is larger than the dimension W1. The film thickness ta of the free magnetic layer in the track-width region A is made larger than the film thickness tb of the free magnetic layer in both side regions B and B. Consequently, the magnetic flux density in the track-width region A of the free magnetic layer resulting from the static magnetic fields generated from both the side regions B and B of the free magnetic layer can be reduced, a dead zone which occurs in the track-width region A of the free magnetic layer can be reduced, and therefore, the magnetic field detection sensitivity is improved.
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patent: A2 2000-293822 (2000-10-01), None
Hasegawa Naoya
Umetsu Eiji
Alps Electric Co. ,Ltd.
Bernatz Kevin M.
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