| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for adjusting the temperature property of a surface acoustic wave (SAW) device which is appropriate to the temperature property of a cubic function of an SAW device employing an in-plane rotated ST cut quartz crystal plate. SOLUTION: The method employs an in-plane rotated ST cut quartz crystal plate having Euler angles of (0 deg., 113-135 deg.,±(40-49 deg.)). The range of the Euler angles is set within ranges of hatching portions 4, 5 so that the temperature property of the SAW device employing an in-plane rotated ST cut quartz crystal plate having the temperature property of a cubic function may have an extreme value within the temperature range -40 to +85 deg.C. By using the ranges of the hatchings 4, 5, the temperature property is rotted about an inflection point to perform adjustment so that the frequency fluctuation range within the operational temperature range is minimized.
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