The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 2024
Filed:
Oct. 23, 2020
Applicant:
Tdk Corporation, Tokyo, JP;
Inventor:
Keisuke Takasugi, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/09 (2006.01); G01N 33/543 (2006.01); H10N 50/85 (2023.01);
U.S. Cl.
CPC ...
G01R 33/093 (2013.01); G01N 33/54326 (2013.01); H10N 50/85 (2023.02);
Abstract
A magnetic sensor used to detect a detection target substance in a sample includes a substrate having a first surface and a second surface, which is opposite the first surface and a magnetoresistive effect element provided on the first surface of the substrate. The resistance of the magnetoresistive effect element changes in accordance with an input magnetic field. A protective layer covers the top of the magnetoresistive effect element. The surface of the protective layer, which is positioned on top of the magnetoresistive effect element, has a prescribed surface roughness.