Method for manufacturing a damping layer for surface wave filter

Details Method for manufacturing a damping layer for surface wave filter Method for manufacturing a damping layer for surface wave filter

1985-08-29

1987-05-19

Kittle, John

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making electrical device

430319, 310312, 310313R, 333194, G03C 500, H01L 4104

Patent

active

046668225

ABSTRACT:
Surface wave filter with a slab-shaped substrate of monocrystalline piezoelectric material, particularly lithium niobate, having input and output transducers optionally coupled by means of a coupler on one substrate side. A plastic and/or elastic damping layer are applied for suppressing reflected waves. The damping layer covers at least in some regions, this substrate side except for the area which is bounded by the transducers, the coupler, the ends of the conductor runs and the regions between the transducers and the coupler. The end face edge of the damping layer increases at least in sections, gradually from zero to the value of the layer thickness.

REFERENCES:
patent: 4037181 (1977-07-01), Ieki et al.
patent: 4510410 (1985-04-01), Yuhara et al.
patent: 4513262 (1985-04-01), Schofield et al.

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