Patent ID: 8289021

Claim:
A sensor, comprising: a substrate of semiconductor material having an upper surface, a first sloping wall inclined with respect to said upper surface and extending longitudinally in a first direction, and a second sloping wall inclined with respect to said upper surface and extending longitudinally in a second direction substantially perpendicular to the first direction; a first plurality of magnetoresistive elements, each magnetoresistive element of the first plurality including a strip of magnetoresistive material formed on the substrate, said strip comprising a planar portion, extending substantially parallel to said upper surface, and a transverse portion extending on said first sloping wall, transversally to said upper surface, wherein the strips of said magnetoresistive elements of said first plurality are arranged substantially parallel to the second direction; and a second plurality of magnetoresistive elements, each magnetoresistive element of the second plurality including a strip of magnetoresistive material formed on the substrate, said strip comprising a planar portion, extending substantially parallel to said upper surface, and a transverse portion extending on said second sloping wall, transversally to said upper surface, wherein the strips of said magnetoresistive elements of said second plurality are arranged substantially parallel to the first direction.