| 主权项 |
1. A piezoelectric device (50, 60, 70) that comprises at least one element (58) that comprises at least one sheet (54) of piezoelectric material defining an area, characterized in that:
the element (58) has been mounted or placed on a circuit board (30, 78) comprising at least one conductive layer (51; 701, 702, 703, 704) with at least one opening (35, 37; 81, 82) in the conductive layer (51; 701, 702, 703, 704); the element (58) being located on the opening (35, 37; 81, 82) and supported by edges of said at least one opening (35, 37; 81, 82), in such a manner that the opening (35, 37; 81, 82) extends laterally beyond the area of the sheet (54) of piezoelectric material; and the element (58) is sandwiched between an overlay (503) and the circuit board (30, 78) in such a manner that vibrations of the sheet (54) of piezoelectric material are sufficient to cause tactile vibration of the overlay (503). |
