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:
Mar. 19, 2024
Filed:
Sep. 29, 2020
Applicant:
Taiyo Yuden Co., Ltd., Tokyo, JP;
Inventors:
Tomohiro Harada, Tokyo, JP;
Yuuhei Ueyama, Tokyo, JP;
Assignee:
TAIYO YUDEN CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 41/187 (2006.01); H01L 41/047 (2006.01); H01L 41/312 (2013.01); H01L 41/43 (2013.01); H10N 30/072 (2023.01); H10N 30/097 (2023.01); H10N 30/853 (2023.01); H10N 30/87 (2023.01);
U.S. Cl.
CPC ...
H10N 30/8536 (2023.02); H10N 30/072 (2023.02); H10N 30/097 (2023.02); H10N 30/871 (2023.02);
Abstract
A piezoelectric ceramic containing no lead as a constituent element is provided. Coefficient of variation C.V. of grain size of grains contained in the piezoelectric ceramic is 35% or less, and an image quality (IQ) image obtained by analyzing a cross section of the piezoelectric ceramic by an electron backscatter diffraction (EBSD) method shows that at least one of the grains has a grain size of 3 μm to 5 μm and an area ratio of a domain in said at least one of the grains is 85% or more.