Crystal resonator
AssigneeNihon Dempa Kogyo Co., Ltd.
InventorsMITSUAKI KOYAMA, MANABU ISHIKAWA, TAKERU MUTOH
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Abstract
A crystal resonator includes a mesa-type crystal element, a pair of excitation electrodes, and a deformed portion. The mesa-type crystal element has a principal surface portion and a peripheral edge portion. The peripheral edge portion surrounds the principal surface portion and has a smaller thickness than the principal surface portion. The pair of excitation electrodes are formed at the principal surface portion on one surface side and the principal surface portion on an other surface side of the crystal element, respectively. The deformed portion is configured to reduce a vibration different from a main vibration and confine energy to the principal surface portion.
Claims20
A crystal resonator, comprising:
- a mesa-type crystal element, having a principal surface portion and a peripheral edge portion, the peripheral edge portion surrounding the principal surface portion and the peripheral edge portion having a smaller thickness than the principal surface portion;
- a pair of excitation electrodes, formed at the principal surface portion on one surface side and the principal surface portion on other surface side of the crystal element, respectively;
- and
- a deformed portion, configured to reduce a vibration different from a main vibration, and the deformed portion confines energy to the principal surface portion.
Dependencies are inferred from the claim text.