Surface acoustic wave device with closely spaced discharge elect

Details Surface acoustic wave device with closely spaced discharge elect Surface acoustic wave device with closely spaced discharge elect

1999-03-11

2000-03-07

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333195, 310313B, 310313D, H03H 964, H03H 308

Patent

active

060345780

ABSTRACT:
A surface acoustic wave device which comprises: a plurality of interdigital transducers formed on a surface acoustic wave substrate; and a plurality of thin film electrodes disposed between the interdigital transducers and an end surface of the surface acoustic wave substrate and electrically independently of the interdigital transducers, at least one of distances between adjacent ones of the thin film electrodes being set to be smaller than a distance between the thin film electrodes and the interdigital transducers, so that the electrical performance of the device as well as the insulation resistance does not deteriorate, and the interdigital transducers can be prevented from being electrostatically broken.

REFERENCES:
patent: 5243249 (1993-09-01), Miyashita et al.
patent: 5325573 (1994-07-01), Miyashita et al.
patent: 5619175 (1997-04-01), Bauregger
patent: 5701645 (1997-12-01), Allen et al.
patent: 5889446 (1999-03-01), Yamada et al.

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