Patent ID: 8810112

Claim:
A piezoelectric vibrating device, comprising: a piezoelectric substrate having first and second principal surfaces, the piezoelectric substrate including a rectangular vibrating piece surrounded by an outer frame, the vibrating piece having a first excitation electrode on its first principal surface and a second excitation electrode on its second principal surface, the piezoelectric substrate defining a through-void extending between the vibrating piece and the outer frame so as to separate, at least in part, the vibrating piece from the outer frame, the piezoelectric substrate further including at least one supporting portion extending between the vibrating piece and the outer frame, the supporting portion having a predefined width and extending from the outer frame to the vibrating piece to support the vibrating piece relative to the outer frame, the piezoelectric substrate further including first and second extraction electrodes extending from the first and second excitation electrodes, respectively, across the supporting portion to the outer frame; a package lid having an outer main surface and an inner main surface, the inner main surface being bonded to the first principal surface of the outer frame; and a package base having an inner main surface and an outer main surface, the inner main surface being bonded to the second principal surface of the outer frame, and the outer main surface being a mounting surface by which to mount the device for use; wherein, at least one extraction electrode extends from the first principal surface to the second principal surface via an edge surface of the through-void, the edge surface being located so as not to overlap the respective excitation electrode of the vibrating piece, as viewed from a direction along an edge of the rectangular vibrating piece.