| 摘要 |
A transducer 201 structure for an electronic device comprises an upper inner electrode 204, an upper outer electrode 202, a lower inner electrode 301, a lower outer electrode 302 a layer of piezoelectric material 203 disposed between the upper electrodes and the lower electrodes, an upper gap 205 between the upper inner electrode and the upper outer electrode, and a lower gap 303 between the lower inner electrode and the lower outer electrode. The upper gap 205 and the lower gap 303 are located to substantially coincide with respective inflexion points of the transducer structure during oscillation. The upper and lower electrodes may be connected to form the plates of capacitors, connected in parallel or in series. The electrodes may be selectively connected to contact pads. |
