Surface wave device having enhanced reflectivity gratings

Details Surface wave device having enhanced reflectivity gratings Surface wave device having enhanced reflectivity gratings

1977-05-23

1978-12-19

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

29 2535, 310313, H03H 902, H03H 926, H01L 4122, H01L 4110

Patent

active

041308131

ABSTRACT:
Surface acoustic wave devices are disclosed which have enhanced reflectivity gratings with conductive stripes between grooves in the substrate or conductive stripes within the grooves. For lithium niobate substrates, aluminum stripes coupled together and positioned between grooves or unconnected and positioned within the grooves are preferred. For quartz substrates, gold stripes within the grooves are used. Methods for fabricating such structures are also disclosed.

REFERENCES:
patent: 3983517 (1976-09-01), Weglein
patent: 4013983 (1977-03-01), Hartemann
patent: 4065735 (1977-12-01), Palfreeman et al.
Sandy et al. -- "Research and Development Technical Report -- Report Ecom-75-1348-1," Raytheon Research Division, Watham, Ma., Mar. 1976; title pages; pp. i, ii, iii, and 1-47.

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