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1. (WO2000079607) PIEZOELECTRIC ACTUATOR WITH IMPROVED ELECTRODE CONNECTIONS

Pub. No.:    WO/2000/079607    International Application No.:    PCT/DE2000/001718
Publication Date: Fri Dec 29 00:59:59 CET 2000 International Filing Date: Sat May 27 01:59:59 CEST 2000
IPC: H01L 41/047
H01L 41/083
Applicants: ROBERT BOSCH GMBH
HEINZ, Rudolf
Inventors: HEINZ, Rudolf
Title: PIEZOELECTRIC ACTUATOR WITH IMPROVED ELECTRODE CONNECTIONS
Abstract:
The invention relates to a piezoelectric actuator, for example for actuating a mechanical component. The inventive piezoelectric actuator comprises a multi-layer structure of piezoelectric layers and inner electrodes (2, 3) that are interposed between said layers. A first outer electrode (6) is mounted on each lateral face that is connected to the respective inner electrodes (2, 3) and represents a conductive surface. An elastic contact which supplies an electric voltage is connected to a second mesh- or tissue-type outer electrode (7) via connections (4, 5, 15). Said outer electrode is located on the first outer electrode (6). The second outer electrode contact is connected at least in some points to the first outer contact (6) and is provided with elastic sections in the area of the contact surfaces or points (8; 14; 17). The connections are connected to one another either by a soldering contact (9) on an inactive zone (10) of the piezoelectric actuator or via a contact to elastic folded sections (11) or by point contacts (14, 17) by means of an undulated or comb-shaped wire (15).