Multilayer PZT Electrode Configuration For Suspension Stroke Increase

A piezoelectric actuator assembly having a first end and a second end, the assembly comprising:

• a first layer including a single active piezoelectric layer, the first layer including a top surface and a bottom surface;
• a second layer including as a single active piezoelectric layer, the second layer having a top surface and a bottom surface, wherein the bottom surface of the second layer is disposed over the top surface of the first layer;
• a third layer including as a single active piezoelectric layer, the third layer having a top surface and a bottom surface, wherein the bottom surface of the third layer is disposed over the top surface of the second layer;
• and
• a first electrode disposed on at least a portion of the bottom surface of the first layer, a second electrode disposed between at least a portion of the first layer and the second layer, a third electrode disposed between at least a portion of the second layer and the third layer, a fourth electrode disposed on at least a portion of top surface of the third layer,
• wherein the third electrode is configured to be shorter than the second electrode such that the active PZT length of the second layer and the third layer is shorter than the active PZT length of the first layer.