Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1987-01-29

1988-06-21

Jordan, Charles T.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313B, 333151, 333155, H01L 4108

Patent

active

047527099

ABSTRACT:
A surface acoustic wave device comprising a surface acoustic wave substrate member composed by forming an aluminum oxide film and a thin zinc oxide film successively on a glass substrate. The thickness h.sub.1 of the aluminum oxide film and the thickness h.sub.2 of the zinc oxide film are set within ranges of 0.1.ltoreq.h.sub.1 /.lambda..ltoreq.10 and 0.05.ltoreq.h.sub.2 /.lambda..ltoreq.0.35 (where .lambda. is representative of wavelength of Sezawa wave) respectively, thereby to utilize Sezawa wave or a similar mode wave transmitted on the surface acoustic wave substrate member in multi-layer structure.

REFERENCES:
patent: 3550045 (1970-12-01), Adler
patent: 3559115 (1971-01-01), De Vries
patent: 4025954 (1977-05-01), Bert
patent: 4037176 (1977-07-01), Ono et al.
patent: 4193045 (1980-03-01), Houkawa et al.
patent: 4243960 (1981-01-01), White et al.
patent: 4322651 (1982-03-01), Inoue et al.
patent: 4354130 (1982-10-01), Ono et al.
Monolithic Sezawa Wave Storage Correlators and Convolvers by J. E. Bowers, B. T. Khuri-Yakub, and G. S. Kino; conference: 1980 Ultrasonics Symposium Proceedings, Boston, MA; 5-7 Nov. 1980.

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