| 摘要 |
PROBLEM TO BE SOLVED: To obtain a means by which a frequency temperature characteristic which is decided uniquely by a piezoelectric substrate, the shape of an electrode, and its film thickness is selected selectively by a resonance of a better characteristic. SOLUTION: In a resonance-type surface acoustic wave device, cyclic electrodes are constituted on the main face of the piezoelectric substrate. From among the resonances in both ends of a step band formed of the cyclic electrodes, the resonance whose frequency temperature deviation within the usage temperature range becomes small is used selectively.
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