Method for electrically contacting a piezoelectric ceramic

Patent metadata

Field	Value
Publication number	US-10074797-B2
Application number	US-201414899918-A
Country	US
Kind code	B2
Filing date	May 26, 2014
Priority date	Jun 20, 2013
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A method for electrically contacting a piezoelectric ceramic includes: providing the piezoelectric ceramic having electrodes for electrically contacting the piezoelectric ceramic and having a flexible, electrically conductive film; producing a composite by applying the flexible, electrically conductive film at least partially to an electrode of the piezoelectric ceramic; forming a durable, electrically conductive connection between the flexible, electrically conductive film and the electrode of the piezoelectric ceramic. Also a sound transducer, as well as a sound transducer array produced using the method for electrically contacting a piezoelectric ceramic.

First claim

What is claimed is:

1. A method for electrically contacting a piezoelectric ceramic, the method comprising:
providing the piezoelectric ceramic having electrodes;
providing a flexible, electrically conductive film;
producing a composite by applying the flexible, electrically conductive film at least partially to an electrode of the piezoelectric ceramic;
forming a durable, electrically conductive connection between the flexible, electrically conductive film and one of the electrodes of the piezoelectric ceramic;
wherein, to form the composite, a conductive adhesive or a solder paste is applied between the flexible, electrically conductive film and the one of the electrodes of the piezoelectric ceramic, and
wherein, with a thermode, heat and/or pressure is introduced into the composite to produce the durable, electrical connection between the one of the electrodes of the piezoelectric ceramic and the flexible, electrical film.

2. The method of claim 1 , wherein the thermode has at least one thermode head having at least one arbitrarily shaped contact surface that is subdividable and that introduces heat and/or pressure into the composite.

3. The method of claim 1 , wherein the thermode head includes a heating element for introducing heat into the composite and a rear spring for introducing pressure in the form of a contact pressure.

4. The method of claim 1 , wherein the thermode has a plurality of thermode heads that are jointly or individually controlled.

5. The method of claim 1 , wherein, once the durable, electrically conductive connection is formed, the flexible, electrically conductive film is connected to an electrical unit.

Assignees

• Bosch Gmbh Robert

Inventors

• Gerlach Andre
• Gerlach Guenter

Classifications

• B06B1/0622

  on one surface · CPC title

• H01L41/29 Primary

  Electricity · mapped topic

• B06B1/0662

  with an electrode on the sensitive surface · CPC title

• B06B1/06 Primary

  operating with piezoelectric effect or with electrostriction (piezoelectric or electrostrictive devices per se H10N30/00) · CPC title

• H10N30/06 Primary

  Forming electrodes or interconnections, e.g. leads or terminals · CPC title