Patent ID: 6411018
Filing Date: 2002-06-25
Classification: H01L

Abstract:
A piezoelectric actuator, comprising:a multilayered structure of piezoelectric layers and electrodes (2, 3) disposed between them; an alternating lateral contacting of the internal electrodes (2, 3) by means of external electrodes (6, 7) via which an electrical voltage can be supplied, wherein an external electrode (7), which is distributed in a net-like or woven cloth-like fashion and mounted on a respective side surface and which is contact at least at points by the respective internal electrodes (2, 3), and an expandable region is disposed between the contacts, and wherein the electrical voltage is supplied by means of connections (4, 5; 13; 15), which likewise have expandable regions between the regions of the contact surface or contact points (8; 14; 17) and/or which are disposed in elastic folded regions (11) of the external electrode (7), said folded regions (11) extending by a distance (h) from an outer surface of said external electrode.