Piezoactuator and method for production of the piezoactuator

US7309944B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Karl Lubitz · Ottobrunn, DE
• Hedwig Murmann-Biesenecker · Beikheim, DE
• Andreas Wolff · Munich, DE

Key dates

• Filing date: Jul 31, 2003
• Grant date: Dec 18, 2007
• Expiry date: Apr 8, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/886

Abstract

A piezoactuator, includes at least one stacked piezoelement, with at least two electrode layers, arranged one over the other along a stacking direction of the piezoelement, at least one piezoelectric layer, arranged between two of the electrode layers and at least one pre-tensioning device, for introduction of force into a volume of the piezoelectric layer via at least one force introduction surface on the piezoelectric layer, which is arranged on at least one of the surface sections facing the pretensioning device. The force introduction surface is smaller than the surface section of the piezoelectric layer and the volume is a partial volume of the piezoelectric layer. The production of the piezoactuator is achieved by introduction of a force into the partial volume of the piezoelectric layer via the force introduction surface on the piezoelectric layer.