Temperature stable cuts of quartz

Details Temperature stable cuts of quartz Temperature stable cuts of quartz

1982-05-17

1983-08-23

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310361, H01L 4108

Patent

active

044006403

ABSTRACT:
Temperature stable cuts of quartz comprise the families of doubly rotated cuts defined by (YXwlt) 0/27/138, 7/27/135.5, 15/40/40, 15/30/38, 12.5/35/130 and rotational equivalents thereof. It is found that SAW devices may be fabricated on these cuts which demonstrate a very high degree of temperature stability and which have other characteristics consistent with practical usage. The sensitivity of the stability to variations in the propagation direction, corresponding to the angle psi, is such that it is advantageous to fabricate several input-output transducer pairs, each slightly rotated with respect to the others, and to chose the most stable for actual use.

REFERENCES:
patent: 4220888 (1980-09-01), Gagnepain et al.
patent: 4247835 (1981-01-01), Lewis

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