Murata Manufacturing Co., Ltd.

Yusuke Nakamura

Shinichiro Kawada

Shigetoshi Hayashi

Seishiro Goto

Akio Fujita

Yoshiyuki Yamakawa

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 &#x2212; 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.

Growing community of inventors

Nagaokakyo, Japan

Yusuke Nakamura