| 摘要 |
PURPOSE:To obtain a piezoelectric element which has a reduced overall thickness, excellent flexibility and mechanical strength and appropriate rigidity and can deliver a large signal output, by composing a flexible piezoelectric element of thin components including a high-polymer piezoelectric member, a flexible electrode sheet, a connecting conductor and a protection film. CONSTITUTION:A high-polymer piezoelectric member 1 has thin-film electrodes 11a, 11b. A flexible electrode sheet 9 includes a high-polymer film 14, a thin-film lead part 13a connected to the electrode 11a, and an electrode 11 having a lead part 13b connected to the electrode 11b, the lead part 13a and the electrode 11 being formed on one surface of the film 14 in such a manner that the lead parts 13a, 13b are disposed at one end of the film 14 adjacent to and in parallel with each other in the width direction of the film 14. The electrode 11b of the piezoelectric member 1 is bonded to the electrode 11 of the sheet 9 by an electrically conductive adhesive, and the electrode 11a and the lead part 13a are connected together by bonding an electrically conductive adhesive- backed copper foil 12 between them. A protection sheet 10 defined by a high-polymer film is bonded to the surface of the copper foil 12 and the exposed surface of the electrode 11a by an adhesive. Thus, it is possible to obtain a piezoelectric element which has a reduced thickness, excellent flexibility and mechanical strength and appropriate rigidity and can deliver a large signal output. |
