Piezoelectric actuator with encapsulation layer having a thickness-varying property gradient

US8198783B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Heiner Bayer · Olching, DE
• Hellmut Freudenberg · Bad Abbach, DE
• Axel Ganster · Schwindegg, DE
• Christoph Hamann · Tauberbischofsheim, DE
• Oliver HENNING · Birkenfeld, DE
• Jens Dahl Jensen · Berlin, DE
• Günter Lugert · Birkenfeld, DE
• Randolf Mock · Munich, DE
• Carsten Schuh · Baldham, DE

Key dates

• Filing date: Apr 24, 2007
• Grant date: Jun 12, 2012
• Expiry date: Nov 30, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/50
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

In a method for the production of a gradient encapsulation layer 20 on a piezoelectric actuator 1, based on this gradient encapsulation layer 20, the piezoelectric actuator 1 does not 5 require an additional housing-like enveloping structure in order to be protected externally. The gradient encapsulation layer 20 is produced by cold gas spraying of particles having different material properties.