Murata Manufacturing Co., Ltd.

Shigeharu Kasai

Koichi Hayashi

Hidekiyo Takaoka

Shizuharu Watanabe

Shodo Takei

Satoshi Shindo

Satoshi Shindou

Yasuhiro Morimoto

In a multilayer piezoelectric actuator, external electrodes are formed on external surfaces of a multilayer piezoelectric body in which a plurality of internal electrodes and a plurality of piezoelectric layers are stacked on top of one another. Each of the external electrodes includes a base electrode and a stress-absorbing external-electrode member formed on the base electrode. The stress-absorbing external-electrode member is provided with an elastically deformable elastic structure, and a planar portion, which is continuous with the elastic structure and has at least an area sufficient for bonding a feeder terminal such as a lead line thereto.

Multilayer peiezoelectric actuator having a stress-absorbing external-electrode member with portions thereof not bonded to a base electrode

A piezoelectric actuator includes external conductors formed on an outer surface of a piezoelectric component. The external conductors each include a thick-film conductor and a conductive reinforcer. The thick-film conductor is provided with a first thick-film conductor formed on the outer surface of the piezoelectric component, second thick-film conductors which are formed on part of an outer surface of the first thick-film conductor and which are in surface-contact with the outer surface of the first thick-film conductor. The conductive reinforcer is attached to outer surfaces of the second thick-film conductors.

Piezoelectric actuator

Growing community of inventors

Yasu, Japan

Shigeharu Kasai