PIEZOELECTRIC ACTUATOR, PIEZOELECTRIC VIBRATION DEVICE, AND MOBILE TERMINAL

摘要

[Problem] To provide a mobile terminal, a piezoelectric vibration device, and a piezoelectric actuator capable of improving bonding reliability between a flexible wiring board and a piezoelectric element, and capable of stably driving for extended periods of time. [Solution] This piezoelectric actuator (1) is characterized by being provided with: a stacked body (4) having, stacked therein, internal electrodes (2) and piezoelectric layers (3); surface electrodes (5) on at least one main surface of the stacked body (4), said surface electrodes (5) being electrically connected with the internal electrodes (2); and a flexible wiring board (6) which has a portion thereof bonded to the one main surface, and which is provided with a wiring conductor (61) electrically connected with the surface electrodes (5). The piezoelectric actuator (1) is further characterized in that the electric connection between the surface electrodes (5) and the wiring conductor (61) is formed by a plurality of interspersed conductive particles (7).