Surface acoustic wave devices

Details Surface acoustic wave devices Surface acoustic wave devices

1986-04-28

1987-07-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

333154, 333196, H01L 4108

Patent

active

046804978

ABSTRACT:
An interdigitated transducer (IDT) has parallel electrodes extending inwardly from one voltage rail and parallel electrodes extending inwardly from another voltage rail. The respective electrodes are interleaved to give a region of overlap or apodization within which the SAW is generated or received, the width of the apodized area varying along the length of the IDT. To prevent performance degradation in the event of an open circuit in a non-overlap region, the electrodes associated with a particular voltage rail are additionally linked by a thin conductor positioned near the boundaries between the apodized or overlap region and each of the non-overlap regions.

REFERENCES:
patent: 4023124 (1977-05-01), Parker et al.
patent: 4144508 (1979-03-01), Lewis et al.
patent: 4333065 (1982-06-01), DeVries
patent: 4426595 (1984-01-01), Kawaura et al.
patent: 4604595 (1986-08-01), Kadota

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