Laminated piezoelectric element

Details Laminated piezoelectric element Laminated piezoelectric element

1993-08-19

1995-02-14

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, H01L 4108

Patent

active

053898516

ABSTRACT:
A laminated piezoelectric element which includes a laminate of piezoelectric ceramic plates and inner electrodes. The piezoelectric ceramic plates are laminated alternately together with the inner electrodes. The laminate is cut so as to have a peripheral surface. A positive outer electrode is connected to one group of inner electrodes at a peripheral surface of the laminate, and a negative outer electrode is connected to another group of inner electrodes at the peripheral surface of the laminate. A coating of fine ceramic particles is applied to, or a ceramic layer is sputtered on, the peripheral surface of the piezoelectric ceramic plates so that the insulation between adjacent inner electrodes is improved.

REFERENCES:
patent: 4392907 (1983-07-01), Shirato et al.
patent: 4633120 (1986-12-01), Sato et al.
patent: 4784893 (1988-11-01), Nishimoto et al.
patent: 4803763 (1989-02-01), Eturo et al.
patent: 4990939 (1991-02-01), Sekiya et al.
patent: 5083366 (1992-01-01), Arakawa et al.
patent: 5148077 (1992-09-01), Grawey et al.
patent: 5196757 (1993-03-01), Omatsu

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