Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

Filed on

1983-06-01

Date issued

1984-06-26

Examiner

Budd, Mark O.

Patent Class

Electrical generator or motor structure

SubClass

Non-dynamoelectric

SubSubClass

Piezoelectric elements and devices

Other Related Categories

310313B, H01L 4108

Type

Patent

Status

active

Patent number

044568479

Description

ABSTRACT:
A surface acoustic wave device comprises a lower electrode provided on an elastic substrate, a piezoelectric film covering the lower electrode and an upper electrode provided on the piezoelectric film. The device is characterized in that the upper electrode comprises first and second double electrodes both opposed to the lower electrode.

REFERENCES:
patent: 3401360 (1968-09-01), Bois
patent: 3723919 (1973-03-01), Adler
patent: 3938062 (1976-02-01), Hopp
patent: 3955160 (1976-05-01), Duffy
patent: 3987376 (1976-10-01), Kerbel
patent: 4037176 (1977-07-01), Ono et al.
patent: 4162465 (1979-07-01), Hunsinger et al.
patent: 4209759 (1980-06-01), Volluet
patent: 4354130 (1982-10-01), Ono et al.

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