Electric current sensor and sensing device

An electric current sensor, comprising:

• a substrate, configured to have a first surface defined by a first axis and a second axis;
• a magnet field sensor, formed on the first surface and configured to detect a magnetic field associated with a third axis, the magnet field sensor further comprising:
• a horizontal magnetoresistive layer, formed on the first surface of the substrate and configured to have a first side along a lengthwise direction thereof, and a second side opposite to the first side;
• a conductive portion, formed on top side or bottom side of the horizontal magnetoresistive layer and configured to have a plurality of conductive structures;
• and
• at least one magnetic field sensing layer, formed at the first side of the horizontal magnetoresistive layer or at the second side of the horizontal magnetoresistive layer, each magnetic field sensing layer comprising at least one sidewall connected to each other;
• and
• a shield structure, arranged at top side of the electric current sensor, bottom side of the electric current sensor or arranged around the electric current sensor for shielding an external magnetic field along the first axis and the second axis;
• and
• a loop circuit, arranged around the periphery of the sensing circuit for generating a first magnetic field along the third axis, and a second magnetic field along the third axis, wherein the magnetic field along the third axis is concentrated to the magnetic field sensors through the first magnetic field and the second magnetic field along the third axis generated by the loop circuit.

An electric current sensing device for detecting an electric current of a conductive wire along a second axis, the electric current sensing device comprising:

• a pair of electric current sensors, respectively and symmetrically arranged at two opposite sides of the conductive wire such that the conductive wire is located between the pair of the electric current sensors, each electric current sensor comprising:
• a substrate, configured to have a first surface defined by a first axis and a second axis;
• a magnetic field sensor, arranged on the first surface for detecting a magnetic field associated with a third axis, the magnetic field sensor further comprising:
• a horizontal magnetoresistive layer, formed on the first surface of the substrate, and configured to have a first side along a lengthwise direction thereof and a second side opposite to the first side;
• a conductive portion, formed on top side or bottom side of the horizontal magnetoresistive layer and configured to have a plurality of conductive structures;
• and
• at least one magnetic field sensing layer, formed at the first side of the horizontal magnetoresistive layer or at the second side of the horizontal magnetoresistive layer, each magnetic field sensing layer comprising at least one sidewall connected to each other;
• and
• a shield structure, arranged at top side of the electric current sensor, bottom side of the electric current sensor or arranged around the electric current sensor for shielding an external magnetic field along the first axis and the second axis.