Patent ID: 8704514

Claim:
An integrated circuit comprising: a semiconductor die comprising a first magnetic field sensor; an isolation material layer over the first magnetic field sensor, and a sintered metal layer over the isolation material layer, the sintered metal layer being electrically isolated from the first magnetic field sensor, wherein the first magnetic field sensor is configured to sense a magnetic field generated by a current passing through the sintered metal layer, wherein the die comprises a second magnetic field sensor, and wherein the first magnetic field sensor and the second magnetic field sensor are configured to differentially sense a magnetic field generated by a current passing through the sintered metal layer, wherein the sintered metal layer extends in a direction parallel to the semiconductor die in the shape of an I having a narrower center portion and wider end portions at each end of the I, wherein the first magnetic field sensor is located adjacent one side of the center portion of the I, and wherein the second magnetic field sensor is located adjacent the other side of the center portion of the I opposite the first magnetic field sensor.