Piezoelectric vibrating piece, piezoelectric device, and method for manufacturing piezoelectric device

摘要

A piezoelectric vibrating piece is to be bonded to and sandwiched between a lid plate and a base plate with an external electrode. The piezoelectric vibrating piece has a first main surface at the lid plate side and a second main surface at the base plate side. The piezoelectric vibrating piece includes an excitation unit, a first excitation electrode, a second excitation electrode, a framing portion, one connecting portion, a first extraction electrode, and a second extraction electrode. The connecting portion includes a planar surface parallel to both the main surfaces and a side face intersecting with the planar surface. The first extraction electrode is extracted via the connecting portion. The second extraction electrode is extracted via the connecting portion. The first extraction electrode is disposed on at least a part of the side face of the connecting portion to be extracted to the framing portion.

主权项

1. A piezoelectric vibrating piece to be bonded to and sandwiched between a lid plate and a base plate with an external electrode, the piezoelectric vibrating piece having a first main surface at the lid plate side and a second main surface at the base plate side, the piezoelectric vibrating piece comprising:
an excitation unit in a rectangular shape, including a first side and a second side, the first side extending in a first direction, the second side extending in a second direction perpendicular to the first direction; a first excitation electrode, on the first main surface of the excitation unit; a second excitation electrode, on the second main surface of the excitation unit; a framing portion, including a first bonding surface and a second bonding surface, the first bonding surface being a surface to be bonded to the lid plate, the second bonding surface being a surface to be bonded to the base plate, the framing portion surrounding the excitation unit; one connecting portion, connecting the first side of the excitation unit and the framing portion together, the connecting portion including a planar surface parallel to both the main surfaces and a side face intersecting with the planar surface; a first extraction electrode, being extracted from the first excitation electrode to the second bonding surface of the framing portion via the connecting portion; and a second extraction electrode, being extracted from the second excitation electrode to the second bonding surface of the framing portion via the connecting portion, wherein, the first extraction electrode is disposed on at least a part of the side face of the connecting portion, and the first extraction electrode is extracted to the framing portion.