Process for producing piezoelectric polymer films
September 16, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3691264 3833503 3878274 Process for producing polymeric piezoelectric elements and the article formed thereby Method of polarizing high molecular weight films Stable electret retaining a high surface potential and method of making the same Method for continuously polarizing thermoplastic film Stabilization of piezoelectric resin elements Machine and method for poling films of pyroelectric and piezoelectric material Single electrode poling of dielectric films InventorsAssigneeApplicationNo. 06/302782 filed on 09/16/1981US Classes:264/435, Molecular aligning or molecular orientating (e.g., poling, etc.)264/104, FORMING ELECTRICAL ARTICLES BY SHAPING ELECTROCONDUCTIVE MATERIAL264/108, ORIENTING OR ALIGNING SOLID PARTICLES IN FLUENT MATRIX MATERIAL264/280, Reshaping running or indefinite-length work264/479, Reshaping, drawing or stretching264/484, Utilizing electrostatic charge, field, force (e.g., pinning, etc.)307/400, ELECTRETS428/412, Of polycarbonate428/421Of fluorinated addition polymer from unsaturated monomersExaminersPrimary: Thurlow, JefferyAttorney, Agent or FirmInternational ClassesH01L 41/22 (20060101)H01L 41/26 (20060101) Foreign Application Priority Data1980-09-19 FRAbstractThe invention relates to piezoelectric polymer films.The invention relates to a production process consisting of stretching a polymer material blank by rolling under an electrical field between two oppositely rotating rollers.The invention is more particularly applicable to the production of electromechanical transducers, whose active elements are constituted by piezoelectric polymer films provided with electrodes.Other References
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