Patent ID: 11921111
Assignee: TDK CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A magnetic sensor used to detect detection substances in samples, the magnetic sensor comprising:
a substrate which has a first surface and a second surface, which is opposite to the first surface;
a magnetoresistance effect element, which is provided on the first surface of the substrate and in which a resistance of the magnetoresistance effect element changes in accordance with an input magnetic field; and
a protective layer, which covers the magnetoresistance effect element;
wherein the magnetoresistance effect element is configured in a line shape extending in a first direction on the first surface of the substrate, and has a first region that is positioned at the outer periphery, in a plan view, and a second region that is surrounded by the first region; and
a height of a top surface of the protective layer on the first region of the magnetoresistance effect element is greater than a height of a top surface of the protective layer on the second region of the magnetoresistance effect element.