Patent ID: 8686621

Claim:
A piezoelectric device, comprising: a vibrating portion that vibrates whenever an electrical voltage is applied; a first plate having a first rectangular profile including a pair of straight first edges and a pair of second edges situated vertically to the pair of straight first edges and configured longer than the pair of straight first edges, the first plate constituting a part of the package for storing the vibrating portion; a second plate having a second rectangular profile, the second plate being bonded to the first plate and constituting another part of the package for storing the vibrating portion, mounting terminals formed on a surface opposite to a surface bonded to the second plate on the first plate, and edge-surface electrodes connecting to the mounting terminals and formed on an edge surface of the first plate, wherein a pair of castellations is formed on each of the pair of straight first edges, the pair of castellations being recessed toward a center of the package base, and the pair of castellations is divided along a straight line that passes through a centerline of the first plate and is formed parallel to the pair of second edges, the edge-surface electrodes is only formed on the castellations.