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:
Feb. 27, 2024
Filed:
Dec. 09, 2020
Applicants:
Denso Corporation, Kariya, JP;
Tokyo University of Science Foundation, Tokyo, JP;
Inventors:
Noriyuki Matsushita, Kariya, JP;
Yoshihiro Kozawa, Kariya, JP;
Kazuhiko Kanoh, Kariya, JP;
Yumi Tanaka, Tokyo, JP;
Assignees:
DENSO CORPORATION, Kariya, JP;
TOKYO UNIVERSITY OF SCIENCE FOUNDATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10N 30/85 (2023.01); H10N 30/30 (2023.01); H10N 30/853 (2023.01); H10N 30/50 (2023.01); H01G 7/06 (2006.01); H01G 7/02 (2006.01); H10N 30/045 (2023.01);
U.S. Cl.
CPC ...
H10N 30/852 (2023.02); H01G 7/025 (2013.01); H01G 7/026 (2013.01); H01G 7/06 (2013.01); H10N 30/30 (2023.02); H10N 30/50 (2023.02); H10N 30/853 (2023.02); H10N 30/045 (2023.02);
Abstract
An electret includes a substrate and an electret layer formed above a surface of the substrate. The electret layer is a composite metal compound containing two or more different metal elements, and is obtained by subjecting a thin film mainly composed of an inorganic dielectric material having a bandgap energy of 4 eV or more to a polarization treatment.