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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 11744156 B1

PDFFull Text
Date of Patent:
Aug. 29, 2023

Filed:

Jul. 30, 2018

Multilayer piezoelectric element, piezoelectric vibration apparatus, and electronic device

Applicant:

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

Inventors:

Hiroshi Hamada, Takasaki, JP;

Hiroyuki Shimizu, Takasaki, JP;

Sumiaki Kishimoto, Takasaki, JP;

Yukihiro Matsui, Takasaki, JP;

Shigeo Ishii, Takasaki, JP;

Tomohiro Harada, Takasaki, JP;

Yukihiro Konishi, Takasaki, JP;

Assignee:

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

Attorney:

Law Office of Katsuhiro Arai

Primary Examiner:

Shawki S Ismail

Assistant Examiner:

Monica Mata

Int. Cl.
CPC ...
H01L 41/083 (2006.01); H01L 41/047 (2006.01); H01L 41/09 (2006.01); H01L 41/273 (2013.01); H01L 41/293 (2013.01); H01L 41/257 (2013.01); H01L 41/313 (2013.01); H10N 30/50 (2023.01); H10N 30/063 (2023.01); H10N 30/073 (2023.01); H10N 30/20 (2023.01); H10N 30/87 (2023.01); G06F 3/01 (2006.01); H10N 30/045 (2023.01); H10N 30/053 (2023.01);
U.S. Cl.
CPC ...
H10N 30/508 (2023.02); H10N 30/063 (2023.02); H10N 30/073 (2023.02); H10N 30/206 (2023.02); H10N 30/872 (2023.02); G06F 3/016 (2013.01); H10N 30/045 (2023.02); H10N 30/053 (2023.02); H10N 30/871 (2023.02);
Abstract

A multilayer piezoelectric element includes a ceramic body formed by a piezoelectric ceramic, and having first and second end face facing a longitudinal direction, first and second principal faces facing a thickness direction perpendicular to the longitudinal direction. A pair of external electrodes cover the first and second end faces, extend from the first and second end faces onto the first principal face via ridge parts connecting the end faces with the principal faces, and project in the thickness direction on the first principal face. Multiple internal electrodes are stacked inside the ceramic body and are connected alternately to the pair of external electrodes along the thickness direction. A surface electrode is provided on at least one of the first and second principal faces, and connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected.

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