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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 11889767 B1

PDFFull Text
Date of Patent:
Jan. 30, 2024

Filed:

Mar. 10, 2020

Multilayer piezoelectric ceramic and method for manufacturing same, multilayer piezoelectric element, as well as piezoelectric vibration apparatus

Applicant:

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

Inventors:

Gouki Watanabe, Takasaki, JP;

Ryo Ito, Takasaki, JP;

Takayuki Goto, Takasaki, JP;

Hiroyuki Shimizu, Takasaki, JP;

Sumiaki Kishimoto, Takasaki, JP;

Assignee:

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

Attorney:

Law Office of Katsuhiro Arai

Primary Examiner:

Benjamin P Sandvik

Int. Cl.
CPC ...
H01L 41/187 (2006.01); H10N 30/853 (2023.01); C04B 35/495 (2006.01); C04B 37/00 (2006.01); H10N 30/20 (2023.01); H10N 30/50 (2023.01); H10N 30/053 (2023.01); H10N 30/87 (2023.01);
U.S. Cl.
CPC ...
H10N 30/8542 (2023.02); C04B 35/495 (2013.01); C04B 37/001 (2013.01); H10N 30/053 (2023.02); H10N 30/20 (2023.02); H10N 30/50 (2023.02); H10N 30/871 (2023.02); H10N 30/877 (2023.02); C04B 2235/3255 (2013.01); C04B 2235/768 (2013.01); C04B 2235/786 (2013.01); C04B 2237/345 (2013.01);
Abstract

A multilayer piezoelectric ceramic is such that: its piezoelectric ceramic layers do not contain lead as a constituent element, and have a perovskite compound expressed by the composition formula LiNaKNbO(where 0.02<x≤0.1, 0.02<x+y≤1), as the primary component; and the internal electrode layers are constituted by a metal containing silver by 80 percent by mass or more, and contain ceramic grains containing the same elements found in the primary component. The multilayer piezoelectric element has a long lifespan, and whose internal electrode layers have a high content percentage of silver.

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Watanabe, Gouki. (2024). Multilayer piezoelectric ceramic and method for manufacturing same, multilayer piezoelectric element, as well as piezoelectric vibration apparatus (U.S. Patent No. 11889767). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11889767

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