Patent ID: 8659213

Claim:
A piezoelectric device, comprising: a piezoelectric vibrating piece having first and second opposing principal surfaces, a respective excitation electrode on each principal surface, and a respective extraction electrode connected to each excitation electrode; a package base having first and second opposing main surfaces, first and second opposing edge surfaces, and a rectangular profile when viewed from above the first main surface, the package base including a pair of connecting electrodes on the first main surface facing the piezoelectric vibrating piece and being connected to respective extraction electrodes, the package base also including two pairs of mounting terminals on the second main surface; a respective pair of castellations on each of the first and second edge surfaces of the package base, the castellations being recessed toward a center of the package base; and a respective pair of edge-surface electrodes on each of the first and second edge surfaces of the castellations, the edge-surface electrodes providing respective electrical connections between the first and second main surfaces of the package base; wherein, of the two pairs of edge-surface electrodes, two edge-surface electrodes connect respective connecting electrodes to two respective mounting terminals.