Method of manufacturing a piezoelectric transducer device
Patent 4384394 Issued on May 24, 1983. Estimated Expiration Date: 
May 13, 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.
May 13, 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 Piezoelectric electro-acoustic transducer Transducer having piezoelectric film arranged with alternating curvatures Patent #: 4056742 InventorsAssigneeApplicationNo. 06/263218 filed on 05/13/1981US Classes:29/25.35, PIEZOELECTRIC DEVICE MAKING264/435, Molecular aligning or molecular orientating (e.g., poling, etc.)264/479, Reshaping, drawing or stretching29/25.42Solid dielectric typeExaminersPrimary: Hall, Carl E.Attorney, Agent or FirmInternational ClassesH01L 41/22 (20060101)H01L 41/113 (20060101) H01L 41/26 (20060101) H04R 17/00 (20060101) H04R 23/02 (20060101) H04R 23/00 (20060101) B06B 1/06 (20060101) H01L 41/107 (20060101) Foreign Application Priority Data1977-11-17 FRAbstractThe invention relates to devices using transducer elements comprising a film of piezoelectric polymer arranged between electrodes. The transducer element in accordance with the present invention is in the form of a thermoformed protuberance. These devices are used for detecting and generating elastic compression waves, for infrared radiation, and for storing electrical energy.Field of SearchPIEZOELECTRIC DEVICE MAKING | |
