Piezoceramic multilayer actuator with high reliability

US8704430B2 · kind B2 · utility

Assignees

• CONTINENTAL AUTOMOTIVE GMBH · DE
• KYOCERA Corporation · JP

Inventors

• Bernhard Döllgast · Wolfsberg, AT
• Masahiro Inagaki · Kariya, JP
• Harald Kastl · Wolfsberg, AT
• Atsushi Ochi · Otsu, JP
• Takami Sakamoto · Kirishima, JP
• Carsten Schuh · Baldham, DE

Key dates

• Filing date: Aug 6, 2007
• Grant date: Apr 22, 2014
• Expiry date: Apr 27, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/508

Abstract

A piezoceramic multilayer actuator has a first sub-stack (12, 14, 16) with a plurality of piezoceramic layers (22) and at least one internal electrode (24, 26), the piezoceramic layers (22) and the at least one internal electrode (24, 26) being laminated in an alternating manner, a second sub-stack (12, 14, 16) has a plurality of piezoceramic layers (22) and at least one internal electrode (24, 26), the piezoceramic layers (22) and the at least one internal electrode (24, 26) being laminated in an alternating manner, and a connection layer (40) arranged between the first sub-stack (12, 14, 16) and the second sub-stack (12, 14, 16), wherein the connection layer (40) is set up by a multitude of single connection points or connection lines (44) or other connection regions.