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US 4,057,660 AGranted
Method for producing thermoplastic film electric element
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsMasafumi Yoshida, Tohru Sasaki, Shuji Terasaki
Life of this patent
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Abstract
Separate polarizing electrodes are attached to the opposite surfaces of a thermoplastic film. A high D. C. voltage is then applied across these electrodes to polarize the film to produce an electric element, such as an electret, piezoelectric or pyroelectric element. Portions of the polarizing electrodes are then selectively removed to form the operating electrodes required for the electric element.
Claims9
A method for producing a thermoplastic film electric element comprising the steps of:
- attaching electrically conductive thin layers on both surfaces of a thermoplastic film, respectively;
- applying a D.C. electric field across the electrically conductive thin layers to polarize the film, then removing at least a part of the electrically conductive thin layers, and thereafter attaching a plurality of non-continuous, electrically conductive, thin-layer, operating electrodes on the film surfaces from which the part of the electrically conductive thin layers has been removed.
A method for producing a thermoplastic film electric element comprising the steps of:
- attaching electrically conductive thin layers on both surfaces of a thermoplastic film respectively;
- applying a D.C. electric field across the electrically conductive thin layers to polarize the film;
- and
- then forming operating electrodes on the element by removing a part of the electrically conductive thin layer on at least one surface of the film by dissolving said part in a solvent.
1 more element
Dependencies are inferred from the claim text.