PIEZOELECTRIC VIBRATION DEVICE

To provide a piezoelectric vibration device capable of sufficiently performing hermetic sealing of a vibration part with an annular seal part.SOLUTION: In a piezoelectric vibration device, annular seal paths 115 and 116 for hermetically sealing a vibration part 11 of a crystal diaphragm 10 are provided between a first seal member 20 and the crystal diaphragm 10 and between a second seal member 30 and the crystal diaphragm 10. Narrow parts 115a, 115b, 116a and 116b of the seal paths 115 and 116 are overlapped with at least one of a portion of first and second terminals 22 and 23 and a portion of external electrode terminals 32 and 32 in a planar view.SELECTED DRAWING: Figure 10 【課題】環状の封止部による振動部の気密封止を十分に行うことが可能な圧電振動デバイスを提供する。【解決手段】圧電振動デバイスにおいて、第１封止部材２０と水晶振動板１０との間、および第２封止部材３０と水晶振動板１０との間には、水晶振動板１０の振動部１１を気密封止する環状のシールパス１１５，１１６が設けられ、シールパス１１５，１１６の幅狭部１１５ａ，１１５ｂ，１１６ａ，１１６ｂが、平面視で、第１、第２端子２２，２３の一部分、および外部電極端子３２，３２の一部分の少なくとも１つと重畳している。【選択図】図１０