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:
Dec. 10, 2024
Filed:
Jun. 16, 2021
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Tomohiro Sakai, Matsumoto, JP;
Yasuaki Hamada, Chino, JP;
Assignee:
SEIKO EPSON CORPORATION, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/187 (2006.01); H10N 30/00 (2023.01); H10N 30/078 (2023.01); H10N 30/079 (2023.01); H10N 30/853 (2023.01);
U.S. Cl.
CPC ...
H10N 30/8542 (2023.02); H10N 30/078 (2023.02); H10N 30/079 (2023.02); H10N 30/708 (2024.05);
Abstract
A piezoelectric elementincludes a first electrode, a second electrode, and a piezoelectric layerprovided between the first electrodeand the second electrode. The piezoelectric layeris composed of a composite oxide having a perovskite-type structure and containing potassium (K), sodium (Na), and niobium (Nb), and has a first peak derived from a (100) plane, a second peak derived from a (010) plane, and a third peak derived from a (001) plane in an X-ray diffraction pattern obtained by θ-2θ measurement.