Method for producing a piezoelectric transducer

US7228606B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur Forderung der Forschung e.V. · DE

Inventors

• Lutz Seffner · Dresden, DE
• Andreas Schönecker · Freital, DE
• Sylvia Gebhardt · Dresden, DE

Key dates

• Filing date: Oct 12, 2000
• Grant date: Jun 12, 2007
• Expiry date: Jan 22, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42

Abstract

A method of manufacturing a piezoelectric transducer including piezoelectric fibers in a polymer matrix is described. The piezoelectric fibers or fiber segments are jacketed with a liquid polymer substance in such a way that a distribution of longitudinal axes of the fibers or fiber segments about a preferential direction occurs. The fibers are compacted among each other and the polymer substance is cured. The resulting composite structure is subsequently so processed that areas of the fibers or fiber segments are exposed along the preferential direction. Then electrical contacts are applied on at least one part of the exposed areas. The method permits the very simple and low-cost manufacture of electro-mechanical transducers made of piezoelectric fibers.