Patent ID: 7391091

Claim:
A ferromagnetic thin-film based magnetic field detection system, said system comprising: a substrate; a magnetic field sensor supported on at least a portion of said substrate at a sensor location; a channel base material supported on at least a portion of said substrate but without being across said magnetic field sensor from said substrate so as to form sides of an extended opening at said sensor location that extends past said magnetic field sensor in at least one direction to thereby form an extended channel gap in said channel base material across from at least a portion of said sensor location; a first electrical conductor supported on said substrate positioned at least in part at said sensor location so as to be in direct contact with at least some surface of said magnetic field sensor; and a second electrical conductor supported on said substrate positioned at least in part along, and between projections of said sides of, said channel gap in a region thereof to be across a selected distance, parallel to said substrate, from a side of said magnetic field sensor and without extending from said region along said channel gap beyond said side.