Flexible piezoelectric device
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsTakashi Sato, Kazuyuki Suzuki, Kenichi Nakamura
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Abstract
A laminated piezoelectric device is formed by sandwiching a relatively rigid central electrode layer with a pair of piezoelectric polymer films and then with a pair of outer electrode layers which are less rigid than the central electrode layer. The laminated piezoelectric device, as a whole, has a good flexibility and shows good piezoelectric characteristics represented by a hydrostatic piezoelectric constant d.sub.h and a symmetrical vibration characteristic. The outer electrode layers may preferably be constituted as a sprayed coating electrode which shows good solderability and peel strength.
Claims12
A flexible laminated piezoelectric device, comprising:
- a relatively rigid central electrode layer, a pair of piezoelectric polymer films or sheets sandwiching the central electrode layer, and a pair of outer electrode layers sandwiching the piezoelectric polymer films or sheets;
- the outer electrode layers comprising at least one of a vapor-deposited coating electrode and a thermally sprayed coating electrode and being less rigid than the central electrode layer and providing a symmetrical flexural deformation characteristic to the laminated piezoelectric device.
A flexible piezoelectric device, comprising:
- a piezoelectric polymer film or sheet, and a thermally sprayed coating electrode disposed on at least one surface of the piezoelectric polymer film or sheet.
A wave-transmitting or-receiving device comprising a piezoelectric device having a relatively rigid central electrode layer, a pair of piezoelectric polymer films or sheets sandwiching the central electrode layer, and a pair of outer electrode layers sandwiching the piezoelectric polymer films or sheets;
- the outer electrode layers comprising at least one of a vapor-deposited coating electrode and a thermally sprayed coating electrode and being less rigid than the central electrode layer and providing a symmetrical flexural deformation characteristic to the laminated piezoelectric device.
A bimorph fan comprising a piezoelectric device having a relatively rigid central electrode layer, a pair of piezoelectric polymer films or sheets sandwiching the central electrode layer, and a pair of outer electrode layers sandwiching the piezoelectric polymer films or sheets;
- the outer electrode layers comprising at least one of a vapor-deposited coating electrode and a thermally sprayed coating electrode and being less rigid than the central electrode layer and providing a symmetrical flexural deformation characteristic to the laminated piezoelectric device.
Dependencies are inferred from the claim text.