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AssigneeU.S. Philips Corporation
InventorWilhelmus H. Iding
Estimating the term…
A device for the conversion of acoustic vibrations into electrical waves and vice versa, comprising at least one capacitor electret element which is connected to an electronic circuit which comprises an impedance transformer. The electret element includes at least one foil of a dielectric polymer material with at least one electrode arranged thereon with a part of the foil extending beyond the electret element. The electronic circuit is in the form of an integrated semiconductor device disposed on this part of the foil with the electrode electrically connected to one terminal of the semiconductor device via a conductor arranged on the foil. The foil may comprise a special pattern of conductors and electrodes, to which the integrated semiconductor device is connected. The assembly can be folded to provide a plurality of transducers in the form of a connector pin.
A device for the conversion of acoustic vibrations into electrical oscillations and vice versa, comprising at least one capacitor electret element provided with at least one foil of a dielectric polymer material with at least one electrode in the form of a metal layer arranged thereon, a diaphragm with a second electrode disposed thereon, said one foil comprising one surface part lying inside the electret element and a second surface part of the foil extending beyond the electret element, and an integrated semiconductor device disposed on said second surface part of the foil and with the metal layer being electrically connected to one terminal of the semiconductor device via a conductor which is disposed mainly on the second surface part of said one foil.
An electro-acoustic conversion device comprising, a thin support body having first and second flat surfaces on opposite sides thereof and a thin side wall, a foil composed of a dielectric polymer material having a metal layer disposed on one surface thereof to form a first electrode, said foil being folded around the support body to cover at least a part of said first and second surfaces and said side wall and with the metal layer on the outside, first and second diaphragms each having a second electrode disposed thereon and closely confronting said first and second support body surfaces, respectively, to form first and second capacitor electret elements acoustically isolated by the support body functioning as a partition, and a semiconductor integrated circuit disposed on said side wall and having one terminal electrically connected to said metal layer which provides an electric connection to said first electrode, the first and second electrodes of the first electret element being electrically connected to the first and second electrodes of the second electret element, respectively.
An electro-acoustic conversion device that includes at least one capacitor electret element provided with a diaphragm having a first electrode disposed thereon and a second electrode functioning as a back electrode, the improvement in the electret element comprising, at least one foil made of a dielectric polymer material with a metal layer arranged thereon to form one of said first or second electrodes, said one foil comprising one surface part lying inside the electret element and a second surface part of the foil extending beyond the electret element, and an integrated semiconductor device disposed on said second surface part of the foil and with the metal layer being electrically connected to one terminal of the semiconductor device via a conductor which is disposed mainly on the second surface part of said one foil.
Dependencies are inferred from the claim text.