Actuator device and method for manufacturing the actuator device

An actuator device manufacturing method comprising:

• forming an inner electrode on one or both surfaces of each of two films made of electrostrictive material, the inner electrodes of the two films including first and second inner electrodes which have different polarities and do not overlap within a region in a stacking direction;
• stacking the two films and rolling the stacked films into a cylindrical body;
• forming at least one cut portion at each end portion of the cylindrical body such that the cut portion reaches the inner electrode, extends through the two films in the stacking direction, and is provided within the region where the first and second inner electrodes do not overlap in the stacking direction;
• and
• applying conductive ink to the cut portion.

An actuator device manufacturing method comprising:

• forming an inner electrode on one or both surfaces of each of two films made of electrostrictive material, the inner electrodes of the two films including first and second inner electrodes which have different polarities and do not overlap within a region in a stacking direction;
• stacking the two films and forming at least one cut portion in the stacked films such that the cut portion reaches the inner electrode, extends through the two films in the stacking direction, and is provided within the region where the first and second inner electrodes do not overlap in the stacking direction;
• applying conductive ink to the cut portion;
• and
• forming a cylindrical body by rolling the stacked films such that a surface to which the conductive ink has been applied faces outward.