RESONANCE DEVICE

摘要

The purpose of the present invention is to enable resonance frequencies to be stabilized. The present invention is provided with: a resonator provided with a lower electrode, a plurality of upper electrodes, and a piezoelectric film formed between the lower electrode and the plurality of upper electrodes; an upper cover which is provided with a first surface and a second surface, and which is provided such that the first surface faces the upper electrodes of the resonator, and seals a first surface of the resonator; a lower cover which is provided with a first surface and a second surface, and which is provided such that the first surface faces the lower electrode of the resonator, and seals the first surface of the resonator; a power supply terminal which is electrically connected to the upper electrodes; and a ground terminal provided to the second surface of the upper cover. The lower electrode is electrically connected to the ground terminal via the upper cover.