Patent ID: 6664784
Filing Date: 2003-12-16
Classification: B82Y,G01R,G11B

Abstract:
A magneto-resistive sensor comprising:(a) a multi-layered structure including a base layer, a magnetic layer, and a non-magnetic layer, said magnetic and non-magnetic layers being deposited on or above said base layer, said multi-layered structure having a sense region therein; and (b) a pair of electrode layers electrically connected to said sense region at its opposite sides, said electrode layers leading a sense current into said sense region at one side thereof and leading said sense current out of said sense region through the other side thereof, said magneto-resistive sensor detecting a magnetic field in accordance with fluctuation in a resistance in said sense region, said base layer being composed of zirconium (Zr) or alloy thereof, wherein a mirror reflectivity of said base layer at a surface of said base layer that-abuts said magnetic layer is equal to or greater than 0.1.