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:
Aug. 15, 2023
Filed:
Jul. 29, 2020
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Yoshiyuki Yamakawa, Nagaokakyo, JP;
Seishiro Goto, Nagaokakyo, JP;
Shinichiro Kawada, Nagaokakyo, JP;
Shigetoshi Hayashi, Nagaokakyo, JP;
Akio Fujita, Nagaokakyo, JP;
Yusuke Nakamura, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo, JP;
Abstract
A piezoelectric actuator that includes a multilayer body, a low-potential outer electrode, and a high-potential outer electrode. The multilayer body includes multiple alternately stacked piezoelectric ceramic layers and planar electrodes. The planar electrodes include low-potential planar electrodes electrically connected to the low-potential outer electrode and high-potential planar electrodes electrically connected to the high-potential outer electrode. The planar electrode positioned most outwardly on the side of a first main surface of the multilayer body is a low-potential planar electrode. The inner surface of this low-potential planar electrode contacts the − side of polarization in an active region, and the outer surface of this low-potential planar electrode is exposed on an outside of the multilayer body. On the side of a second main surface of the multilayer body, a high-potential planar electrode is not exposed on the outside of the multilayer body.