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:
May. 11, 2021
Filed:
Mar. 19, 2019
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Hiroki Katoh, Tokyo, JP;
Yuiko Hirose, Tokyo, JP;
Masakazu Hirose, Tokyo, JP;
Mirai Ishida, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/187 (2006.01); H01L 41/43 (2013.01); C04B 35/495 (2006.01); C04B 35/63 (2006.01);
U.S. Cl.
CPC ...
H01L 41/1873 (2013.01); C04B 35/495 (2013.01); C04B 35/6303 (2013.01); H01L 41/43 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/407 (2013.01); C04B 2235/768 (2013.01); C04B 2235/85 (2013.01);
Abstract
A piezoelectric composition including copper, germanium and a complex oxide represented by a compositional formula KNbOand having a perovskite structure, in which m in the compositional formula satisfies 0.970≤m≤0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wherein x satisfies 0.100≤x≤1.000 and y satisfies 0.000<y≤1.500.