INTEGRATED AMR MAGNETORESISTOR WITH LARGE SCALE

摘要

An integrated AMR magnetoresistive sensor (20) having a magnetoresistor (21), a set/reset coil (22), and a shielding region (23) arranged on top of each other, with the set/reset coil (22) arranged between the magnetoresistor and the shielding region. The magnetoresistor (21) is formed by a magnetoresistive strip (24) of an elongated shape having a length in a first direction (X) parallel to the preferential magnetization direction (EA) and a width in a second direction (Y) perpendicular to the first direction. The set/reset coil (22) has at least one stretch (34a, 34b) extending transversely to the magnetoresistive strip. The shielding region (23) is a ferromagnetic material and has a width in the second direction (Y) greater than the width of the magnetoresistive strip (24) so as to attenuate the external magnetic field (H) traversing the magnetoresistive strip (24) and increasing the sensitivity scale of the magnetoresistive sensor.