Patent ID: 9024632
Filing Date: 2015-05-05
Classification: G01R,H01L,Y10T

Abstract:
1. A magnetic sensor comprising: a substrate having one surface; and a plurality of magneto resistance element portions, disposed above the one surface of the substrate, each of which includes: a free magnetic layer having a magnetization direction changeable in accordance with an external magnetic field; and a pin magnetic layer having a fixed magnetization direction, wherein the magnetization direction of the pin magnetic layer of one of the magneto resistance element portions is different from the magnetization direction of the pin magnetic layer of another one of the magneto resistance element portions on a plane parallel to the one surface of the substrate, wherein, when the external magnetic field is applied to each of the magneto resistance element portions, the magnetic sensor detects a physical amount based on a change in a resistance of each of the magneto resistance element portions, the magnetic sensor further comprising: a plurality of heater portions, each corresponding to one of the magneto resistance element portions, wherein one of the heater portions corresponding to the one of the magneto resistance element portions heats a corresponding pin magnetic layer under a condition that the substrate is arranged in the external magnetic field having an external magnetic field direction set to a first direction on the plane when the pin magnetic layer is magnetized, so that the pin magnetic layer of the one of the magneto resistance element portions is magnetized in the first direction as the fixed magnetization direction, which is different from the fixed magnetization direction of the pin magnetic layer of the another one of the magneto resistance element portions that is magnetized in a second direction as the fixed magnetization direction in such a manner that another one of the heater portions corresponding to the another one of the magneto resistance element portions different from the one of the magneto resistance element portions heats a corresponding pin magnetic layer under a condition that the substrate is arranged in another external magnetic field having another external magnetic field direction set to the second direction on the plane different from the first direction.