Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1994-09-14

1995-07-11

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

333193, H01L 4108

Patent

active

054323932

ABSTRACT:
A includes a non-piezoelectric substrate and a piezoelectric substrate (206) having matched transducers on both opposed surfaces of the piezoelectric substrate (206). The matched transducers being 180 degrees out of phase from one another. The present invention provides for improved coupling due to the new SAW the multilayer transducer topology.

REFERENCES:
patent: 2540412 (1951-02-01), Adler
patent: 3689784 (1972-09-01), DeKlerk
patent: 3737811 (1973-06-01), Paige
patent: 3760204 (1973-09-01), Yester, Jr.
patent: 3825779 (1974-07-01), DeKlerk
patent: 3970970 (1976-07-01), Worley
patent: 4409567 (1983-10-01), Setsune et al.
patent: 4422055 (1983-12-01), Cullen et al.
patent: 4491811 (1985-01-01), Niitsuma et al.
patent: 5323636 (1994-06-01), McGowan et al.

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