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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.:

US 11581482 B1

PDFFull Text
Date of Patent:
Feb. 14, 2023

Filed:

Feb. 25, 2020

Piezoelectric ceramic and method for manufacturing same, as well as piezoelectric element

Applicant:

Taiyo Yuden Co., Ltd., Tokyo, JP;

Inventors:

Yuuhei Ueyama, Takasaki, JP;

Tomohiro Harada, Takasaki, JP;

Hiroyuki Shimizu, Takasaki, JP;

Sumiaki Kishimoto, Takasaki, JP;

Yukihiro Konishi, Takasaki, JP;

Assignee:

TAIYO YUDEN CO., LTD., Tokyo, JP;

Attorney:

Law Office of Katsuhiro Arai

Primary Examiner:

C Melissa Koslow

Int. Cl.
CPC ...
H01L 41/187 (2006.01); H01L 41/43 (2013.01); H01L 41/047 (2006.01); C04B 35/475 (2006.01); C04B 35/64 (2006.01); C04B 35/626 (2006.01);
U.S. Cl.
CPC ...
H01L 41/1878 (2013.01); C04B 35/475 (2013.01); C04B 35/62645 (2013.01); C04B 35/64 (2013.01); H01L 41/0472 (2013.01); H01L 41/1871 (2013.01); H01L 41/43 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/3262 (2013.01); C04B 2235/3298 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/661 (2013.01);
Abstract

A piezoelectric ceramic, which does not contain lead as a constituent element, is characterized in that: its primary component is a perovskite compound expressed by the composition formula (BiNaBa)(TiMn)O(where 0.01≤x≤0.25, 0.001≤y≤0.020); and the coefficient of variation (CV) in grain size among the grains contained therein is 35 percent or lower. The piezoelectric ceramic presents an improved dielectric loss tangent tan δ.

Find Patent Forward Citations

Ueyama, Yuuhei. (2023). Piezoelectric ceramic and method for manufacturing same, as well as piezoelectric element (U.S. Patent No. 11581482). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11581482

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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