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:
Nov. 05, 2024
Filed:
Feb. 10, 2020
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Hiroki Katoh, Tokyo, JP;
Yumi Akiyama, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10N 30/853 (2023.01); C04B 35/495 (2006.01); H02N 2/10 (2006.01); H03H 9/56 (2006.01); H10N 30/40 (2023.01); H10N 30/50 (2023.01);
U.S. Cl.
CPC ...
H10N 30/8542 (2023.02); C04B 35/495 (2013.01); H02N 2/103 (2013.01); H03H 9/562 (2013.01); H10N 30/40 (2023.02); H10N 30/50 (2023.02); C04B 2235/3201 (2013.01); C04B 2235/3239 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/3281 (2013.01);
Abstract
A piezoelectric composition containing: at least one or more elements selected from alkali metal elements; at least one or more elements selected from a group consisting of vanadium, niobium, and tantalum; copper or copper and germanium; and oxygen. The piezoelectric composition has a main phase, and a high Cu-concentration phase in which a content ratio of copper is higher than the main phase, and when a content ratio of oxygen in the high Cu-concentration phase is set as O, and a content ratio of copper is set as Cu, Oand Cusatisfy relationships of 51≤O≤60 and 2.0≤Cu≤15.