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1. (WO2013120754) SOUND TRANSDUCER ARRANGEMENT

Pub. No.:    WO/2013/120754    International Application No.:    PCT/EP2013/052392
Publication Date: Fri Aug 23 01:59:59 CEST 2013 International Filing Date: Fri Feb 08 00:59:59 CET 2013
IPC: B06B 1/02
B06B 1/06
Applicants: ROBERT BOSCH GMBH
Inventors: GERLACH, Andre
Title: SOUND TRANSDUCER ARRANGEMENT
Abstract:
The invention proposes a sound transducer arrangement comprising a piezoelectrically active electret material between a first electrode structure and a second electrode structure. The electret material is applied to the first electrode structure, in particular in such a manner that the first electrode structure is completely covered with the electret material. The second electrode structure is arranged on or above the electret material, with the result that the electret material is situated between the first and second electrode structures. The first electrode structure is formed from a plurality of electrode elements which can be addressed independently of one another. The electrode elements therefore define the individual sound transducer elements which together form a sound transducer arrangement, also referred to as an array. In this case, according to the invention, the first electrode structure is formed on a surface of a multilayer circuit carrier.