High piezoelectric coupling-temperature compensated berlinite su

Details High piezoelectric coupling-temperature compensated berlinite su High piezoelectric coupling-temperature compensated berlinite su

1977-08-19

1978-08-22

Budd, Mark

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310360, H01L 4110

Patent

active

041091728

ABSTRACT:
A singly rotated propagation surface defining cut of single crystal berlinite (AIPO.sub.4) is utilized to provide a temperature compensated surface acoustic wave (SAW) substrate having a high piezoelectric coupling factor. The preferred embodiment of the invention comprises a berlinite substrate member having a propagation surface that substantially coincides with a plane defined by Euler angles Lambda = 0.0.degree., mu = 80.4.degree., and Theta = 0.0.degree..

REFERENCES:
patent: 3866153 (1975-02-01), Slobodnik, Jr.
patent: 3956718 (1976-05-01), Weinert et al.
patent: 3983515 (1976-09-01), Mitchell et al.
patent: 4001767 (1977-01-01), Slobodnik, Jr.

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