Acoustical wax on a surface wave device

Details Acoustical wax on a surface wave device Acoustical wax on a surface wave device

1982-02-01

1984-09-04

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333150, 333153, 333196, H03H 9145, H03H 964

Patent

active

044700261

ABSTRACT:
A surface acoustic wave (SAW) filter partially coated with an acoustical wax, such as one soluble in trichlorethylene, or with an epoxy paint dramatically improves the performance of the filter, especially with regard to the attenuation of out-of-band signals.
The coating pattern may be initially empirically determined depending on the substrate and transducer configuration but once determined is readily amenable to known printing and stamping techniques.

REFERENCES:
patent: 4146851 (1979-03-01), Dempsey et al.
patent: 4234859 (1980-11-01), Ikushima et al.
patent: 4243960 (1981-01-01), White et al.
patent: 4247835 (1981-01-01), Lewis
patent: 4350963 (1982-09-01), Iwamoto et al.

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