Piezo actuator with novel contacting and production method

US6316863A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Carsten Schuh · Baldham, DE
• Clemens Scherer · Gilching, DE
• Wilhelm Hekele · Burg (Dithmarschen), DE
• Christoph Hamann · Tauberbischofsheim, DE

Key dates

• Filing date: Jul 15, 1999
• Grant date: Nov 13, 2001
• Expiry date: Jul 15, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/875

Abstract

In the operation of piezoactuators of multilayer construction, during the polarizing or during the operation of the piezoactuator tears can arise, due to voltages, in the metallization strips that are attached to the actuator on the outside for contacting the electrode layers. It is inventively proposed to install electrically conductive contact lugs directly at the stack or on the metallization strips such that a laterally protruding region remains, so that, even given arising tears, these nevertheless extend in the protruding region of the contact lug, and the tears are electrically bridged. Electrical terminal elements are provided so as the project above or laterally at the contact lugs.