Process for manufacturing electromechanical transducers using at least one polymer film
Patent 4403382 Issued on September 13, 1983. Estimated Expiration Date: 
March 2, 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.
March 2, 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 3816774 Polymeric piezoelectric transducer with thermoformed protuberances Method of fabricating piezoelectric transducer with polymer element Patent #: 4346505 InventorsAssigneeApplicationNo. 06/239643 filed on 03/02/1981US Classes:29/25.35, PIEZOELECTRIC DEVICE MAKING264/435, Molecular aligning or molecular orientating (e.g., poling, etc.)264/479, Reshaping, drawing or stretching310/357, Orientation of piezoelectric polarization310/800PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF)ExaminersPrimary: Hall, Carl E.Assistant: Echols, P. W. Attorney, Agent or FirmInternational ClassesH01L 41/22 (20060101)H01L 41/26 (20060101) H04R 17/00 (20060101) Foreign Application Priority Data1980-03-04 FRAbstractThe invention relates to the manufacture of electromechanical transducers with at least one element made from a polymer material shaped and polarized so as to obtain an active self-supporting structure having a nondevelopable surface and to a manufacturing process which consists in shaping a structure already coated with metalizations, so that the electric polarizing field may be applied to the structure during shaping and until return thereof to ambient temperature.Other References
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