Method for producing a composite ultrasonic transducer

US6301761A · kind A · utility

Assignee

• STN ATLAS Elektronik GmbH · DE

Inventors

• Axel Brenner · Düsseldorf, DE
• Kurt Handschuh · Eckental, DE

Key dates

• Filing date: Oct 5, 1998
• Grant date: Oct 16, 2001
• Expiry date: Oct 5, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method of producing a composite ultrasonic transducer having transducer elements comprising piezoelectric ceramic, with the elements being dispersed in plastic and radiating essentially in the longitudinal direction. To reduce production costs, in several method steps, a plurality of flat ceramic bodies (20) having a plurality of parallel, slot-like openings (21) that are closed on all sides are inserted into a casting mold (25), and the casting mold (25) is filled with plastic (26). After hardening, the resulting ingot (28) is unmolded, and, on the unmolded ingot (28), the ceramic material (26) on the end surfaces away from one another and extending transversely to the longitudinal direction of the openings (21) is removed to the point that the plastic material (26) imbedded in the openings (21) is exposed at the end surfaces (211).