Surface acoustic wave devices having long-term frequency stabili

Details Surface acoustic wave devices having long-term frequency stabili Surface acoustic wave devices having long-term frequency stabili

1991-10-25

1993-03-23

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313D, 333154, 333195, H01L 4108

Patent

active

051967537

ABSTRACT:
A surface acoustic wave device includes a substrate having a surface which supports surface acoustic wave propagation and having a pair of interdigitated transducers disposed thereon. Each of the pair of interdigitated transducers has a set conductive members. To improve the ratio of devices having acceptable long-term frequency stability characteristics to those without such acceptable characteristics, the conductive members of the pair of interdigitated transducers have a larger than conventional thickness.

REFERENCES:
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patent: 4353046 (1982-10-01), Hartmann
patent: 4464597 (1984-08-01), Setsune
patent: 4499440 (1985-02-01), Grudkowski
patent: 4890369 (1990-01-01), Tanski
patent: 4910839 (1990-03-01), Wright
patent: 4916348 (1990-04-01), Beggs et al.
patent: 4933588 (1990-06-01), Greer
patent: 4978879 (1990-12-01), Satoh et al.

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