LAMINATED PIEZOELECTRIC ACTUATOR

摘要

Provided is a laminated piezoelectric actuator wherein disconnection with an external electrode due to stress is not easily generated, and furthermore, feeding terminals such as a lead line is not easily removed from the external electrode. In a laminated piezoelectric actuator (1), an external electrode (9) is formed on an outer surface of a laminated piezoelectric body (2) wherein a plurality of internal electrodes and a plurality of piezoelectric layers are laminated. The external electrode (9) has a base electrode (10) and a stress absorbing external electrode material (11) formed on the base electrode (10). The stress absorbing external electrode material (11) is provided with an elastically deformable elastic structure section (11a), and a flat surface section, which is continuous to the elastic structure section (11a) and at least has an area which is sufficient for connecting feeding terminals such as a lead line.