Elastic surface wave device and method for making the same

Details Elastic surface wave device and method for making the same Elastic surface wave device and method for making the same

1979-02-14

1980-11-18

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

29 2535, 310313B, 333194, H03H 925, H03H 942, H03H 308, H03H 910

Patent

active

042348595

ABSTRACT:
This invention provides an elastic surface wave device utilizing Bluestein-Gulyaev wave and constructed by a unitary body of a piezoelectric plate having a plurality of transducers thereon, wherein the wave propagation surface being coated with an insulating rubber and being embedded in molding by an insulating powdered epoxy resin, or whose body is attached on a unitary supporting substrate via double adhesive layers; wherein one layer is composed of one kind of adhesive resin and the other is composed of another kind of adhesive resin different from the former in ultrasonic property. This device is advantageous because it has a low spurious signal level without increasing insertion loss, and is easy to manufacture and inexpensive. This invention also provides an effective method for making the device.

REFERENCES:
patent: 4028646 (1977-06-01), Ikushima et al.
patent: 4047130 (1977-09-01), Lim et al.
patent: 4054808 (1977-10-01), Tanaka

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