Surface acoustic wave device with a 3-phase unidirectional trans

Details Surface acoustic wave device with a 3-phase unidirectional trans Surface acoustic wave device with a 3-phase unidirectional trans

1983-06-30

1986-07-22

Mullins, James B.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

333154, 333195, 333151, 333193, H03H 942

Patent

active

046021833

ABSTRACT:
A surface acoustic wave device comprises an elastic substrate; a lower electrode provided on the elastic substrate; a piezo-electric film covering the lower electrode; and plural upper electrodes which each include plural electrode fingers and are aligned with and spaced from each other on the piezoelectric film in confrontation with the lower electrode.

REFERENCES:
patent: 4087714 (1978-05-01), La Rosa et al.
patent: 4194171 (1980-03-01), Jelks
patent: 4206380 (1980-06-01), Hazama et al.
patent: 4267533 (1981-05-01), Dempsey et al.
patent: 4449107 (1984-05-01), Asai et al.
patent: 4491811 (1985-01-01), Niitsuma et al.

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