X33 cut quartz for temperature compensated SAW devices

Details X33 cut quartz for temperature compensated SAW devices X33 cut quartz for temperature compensated SAW devices

1984-05-25

1986-07-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310361, 333154, H01L 4108

Patent

active

046021825

ABSTRACT:
An X-cut, 33.44 degree quartz crystal for propagating surface acoustic waves with a temperature stability in the order of -0.0209 ppm/C.sup.2. The crystal orientation requires only a single rotation (33.44.degree.) from the crystal axes. This orientation is substantially simpler than previously reported cuts with comparable temperature stability which typically require three rotations. The X cut orientation has a surface acoustic wave (SAW) velocity of 3175 m/sec, an electromechanical coupling (.DELTA.v/v) of 4.times.10.sup.-4, and a power flow angle of 2.7 degrees.

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