Several piezo ceramic elements, such as disks or plates, are stacked and glued to stack actuators for a greater displacement. These are then fitted with contact electrodes and an outer insulation layer of polymer material.
Standard contacts for piezo actuators are 100 mm stranded wires or soldering points. For each piezo element, different wires according to the AWG standard are used. External soldering guides are used for the parallel operation of all layers.
Optionally the piezo actuators can be fitted with sensors to measure displacement. They are then suited for repeatable positioning with nanometer precision. For overheating protection, the actuators can be equipped with temperature sensors.
For mechanical coupling of the actuators, specific end pieces (tips and bases) can be mounted. Possible designs are low-profile or spherical end pieces made of metal, ceramics, glass or sapphire. Application-specific end pieces can be manufactured on request.
Stack actuators have proven their high reliability in applications for the semiconductor industry and medical engineering. PI Ceramic offers the following standard products:
>> PICA Stack, Power and Thru Actuators
>> PICA Shear Actuators
>> Bending elements can be constructed from piezo disks and plates within certain manufacturing limits. Constructed in series or parallel, they can be manufactured both in round and rectangular shape.