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. 23, 2023
Filed:
Mar. 20, 2018
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 41/187 (2006.01);
U.S. Cl.
CPC ...
H10N 30/8542 (2023.02); H10N 30/072 (2023.02); H10N 30/50 (2023.02); H10N 30/097 (2023.02);
Abstract
A piezoelectric composition including manganese and a complex oxide having a perovskite structure represented by a general formula ABO, wherein an A site element in the ABOis potassium or potassium and sodium, a B site element in the ABOis niobium, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less.