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:
Sep. 16, 2025
Filed:
Aug. 31, 2022
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Tatsuo Shibata, Tokyo, JP;
Kuniyasu Ito, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10N 52/80 (2023.01); H10B 61/00 (2023.01); H10N 52/01 (2023.01);
U.S. Cl.
CPC ...
H10N 52/80 (2023.02); H10B 61/00 (2023.02); H10N 52/01 (2023.02);
Abstract
A magnetic domain wall movement type magnetic recording element according to an embodiment includes: a first ferromagnetic layer which includes a ferromagnetic body; a non-magnetic layer which faces the first ferromagnetic layer; and a magnetic recording layer which faces a surface of the non-magnetic layer on a side opposite to the first ferromagnetic layer and extends in a first direction. A first surface of the magnetic recording layer which faces the non-magnetic layer has a smaller arithmetic mean roughness than a second surface opposite to the first surface.