Patent ID: 7271526

Claim:
A piezoelectric actuator, comprising a multilayered structure of piezoelectric layers ( 2 ) with inner electrodes ( 3 , 4 ) disposed between them, a contacting of the inner electrodes ( 3 , 4 ) on alternating sides with outer electrodes ( 5 , 6 ), and chamfered corners or edges ( 10 ) on the piezoelectric actuator ( 1 ), wherein the inner electrodes ( 3 ) having a contour in the region of the corners or edges ( 10 ), on the sides of the piezoelectric actuator ( 1 ) on which the inner electrodes ( 3 , 4 ) with alternating polarities are routed to the respective outer electrodes ( 5 , 6 ), that makes it possible to achieve a lower field intensity between the inner electrodes ( 3 , 4 ) of alternating polarities in the structure of piezoelectric layers ( 2 ), wherein the chamfers at the corners of the piezoelectric actuator ( 1 ) are embodied so that the entire corner of the piezoelectric actuator ( 1 ) is beveled and the contour of the respectively non-contacted inner electrode ( 3 ), is rounded.