Process for manufacturing a piezoelectric transducer made from a polymer material
Patent 4345359 Issued on August 24, 1982. Estimated Expiration Date: 
August 18, 2000. 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.
August 18, 2000. 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 3391044 Production of piezoelectric PVDF films Patent #: 4241128 InventorAssigneeApplicationNo. 06/179220 filed on 08/18/1980US Classes:29/25.35, PIEZOELECTRIC DEVICE MAKING264/435, Molecular aligning or molecular orientating (e.g., poling, etc.)264/479, Reshaping, drawing or stretching264/483, Plasma (e.g., corona, glow discharge, etc.)310/357, Orientation of piezoelectric polarization310/367, Piezoelectric element shape361/233Use of forces of electric charge or fieldExaminersPrimary: Hall, Carl E.Attorney, Agent or FirmInternational ClassesH01L 41/22 (20060101)H01L 41/26 (20060101) H04R 17/00 (20060101) Foreign Application Priority Data1979-08-21 FRAbstractThe invention relates to piezoelectric and pyroelectric transducers whose active element is formed by a polymer film. The invention provides a process for manufacturing a transducer from a flat polymer film which consists in stretching this film over a mold so as to give it a self-supporting form and to electroform this film by means of a corona discharge. | |
