Crystal resonator of (yzw).theta. orientation having a thickness

Details Crystal resonator of (yzw).theta. orientation having a thickness Crystal resonator of (yzw).theta. orientation having a thickness

1974-11-29

1976-05-04

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

H01L 4118

Patent

active

039551091

ABSTRACT:
Spurious modes related to the slow shear mode in an X-cut lithium tantalate crystal are suppressed and/or eliminated by reducing the ratio of plate dimension along the slow shear direction (y') to the dimension along the X direction. Undesired modes associated with the flexural family of modes can be separated in frequency from the desired, fast shear mode by the "proper" ratio of plate dimension along the fast shear direction (z') to the dimension along the X axis.

REFERENCES:
patent: 3461408 (1969-08-01), Onoe et al.
patent: 3591813 (1971-07-01), Coquin
patent: 3601639 (1971-08-01), Hannon
patent: 3735161 (1973-05-01), Perkins
patent: 3858065 (1974-12-01), Epstein
Determination of Elastic and Piezoelectric Constants for Crystals in Class (3m), by Warner et al., J.A.S.A., Vol. 42, No. 6, 1967, pp. 1223-1231.
High-Performance LiNbO.sub.3 Acoustic Surface Wave Transducers and Delay Lines, by Collins et al., Applied Physics Letters, Vol. 13, No. 9, Nov. 1968, pp. 312, 313.

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