Acoustic electrical conversion device with at least one...

H - Electricity – 04 – R

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349/66, 349/67

H04R 19/01 (2006.01) H04R 25/00 (2006.01)

Patent

CA 1135829

ABSTRACT: The device according to the invention com- prises at least one capacitor electret element. The said electret element is provided with at least one foil of a dielectric polymer material with a metal layer thereon to form either the back electrode of the elec- tret element, or to form the electrode which is disposed on the diaphragm of the said electret elements. The said foil comprises one surface part lying inside the electret element and a second surface part extending beyond the electret element. An electronic circuit disposed on the said second surface part, the metal layer being arranged on said first mentioned surface part, the metal layer further being connected to one of the terminals of the semiconductor device via a conductor which is disposed on the said foil. The electrical connection between electrodes and electronic circuits in devices according to the state of the art need to be obtained by means of soldering and accordingly give reason to malfunctioning, especially when the said device has been subjected to vibrations or shocks. In the device according to the invention electrical connections can be obtained without soldering which means that a more reliable device can be obtained which moreover is more easy and cheaper to manufacture.

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