Patent ID: 6448692
Filing Date: 2002-09-10
Classification: H01L

Abstract:
A piezoelectric actuator comprising an actuator body 10 having end faces, said actuator body (10) being in the form of a multilayer laminate of stacked layers of piezoelectric material and intervening metallic or electrically conductive layers which function as electrodes, said actuator including one bottom plate (11) and an opposed top plate (12) being mounted on each of the end faces of the actuator body,the actuator body (10), on each of its end faces, has one piezoelectrically inactive cover layer (13, 14), and that connection faces of the bottom plate (11) and the top plate (12) which adjoin the end faces of the actuator body (10) have fixation elements (16, 17; 18) that grip the cover layers, for at least nonpositive fixation of the cover layers (13, 14) of the actuator body (10), wherein the fixation elements each have one fixation ring (18), adapted in an inside dimension to the outer dimensions of the adjoining cover layer (13, 14) of the actuator body (10), on the connection face of the bottom plate (11) and the top plate (12).