Piezoelectric device

Details Piezoelectric device Piezoelectric device

1994-03-07

1994-12-27

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310358, 310365, H01L 4108

Patent

active

053768574

ABSTRACT:
A piezoelectric device (1) includes an at least locally thin-walled ceramic substrate (2) and at least one piezoelectric transducer (3) on the substrate (2). The piezoelectric transducer (3) includes a lower electrode layer (4), a piezoelectric layer (5) and an upper electrode layer (6) which are sequentially laminated with each other. The piezoelectric layer (5) has a dimension which is sufficient to cover substantially completely the lower electrode layer (4). The piezoelectric layer (5) has at least one edge (7) which protrudes beyond the lower electrode layer (4) and which is at least locally incompletely bonded to the ceramic substrate (2).

REFERENCES:
patent: 5089455 (1992-02-01), Ketcham et al.
patent: 5210455 (1993-05-01), Takeuchi et al.
patent: 5281888 (1994-01-01), Takeuchi et al.

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