Vibration resistant quartz crystal resonators
Abstract
The principal objectives of this investigation were to provide doubly rotated quartz crystal resonators that exhibit low "g' sensitivity on the order of 1 superscript 10 per "g', and fast warm-up on the order of 1 superscript 9 in three minutes. Effects of changes in the mounting orientation have been investigated with respect to the magnitude of the acceleration sensitivity vector, for 0 angles of 21.95, 23.75 and 25.00, using 5 MHz/5th overtone plano-convex and bi-convex quartz crystal blanks. The mounting technique was three-point thermo-compression bonding; the mounts were 90 degrees apart. A new thermo-compression bonding ribbon was evaluated and instituted. 5 MHz and 10 MHz, third overtone crystals and 20 MHz fifth overtone crystals were measured for the magnitude of the acceleration sensitivity vector. Improved methods of X-ray orientation were also investigated.
- Publication:
-
Final Report
- Pub Date:
- November 1982
- Bibcode:
- 1982fei..rept.....G
- Keywords:
-
- Quartz Crystals;
- Resonators;
- Acceleration (Physics);
- Angles (Geometry);
- Bearing (Direction);
- Bonding;
- Circuits;
- Fabrication;
- High Frequencies;
- Piezoelectric Crystals;
- Pressure;
- Rotation;
- Sensitivity;
- Shock Resistance;
- Thermal Stability;
- Vibrational Stress;
- X Ray Stress Measurement;
- Electronics and Electrical Engineering