Patent ID: 8664837

Claim:
A surface mount type piezoelectric device, comprising: a piezoelectric vibrating piece that includes a vibrator with a pair of excitation electrodes and an extraction electrode extracted from the pair of excitation electrodes, the vibrator vibrating at a predetermined vibration frequency; a base plate in a rectangular shape that has one principal surface and another principal surface, a pair of connecting electrodes being on the one principal surface and electrically connecting to the extraction electrodes, a pair of mounting terminals being on the another principal surface, the piezoelectric device being to be mounted with the pair of mounting terminals; and a lid plate that seals the vibrator, wherein the another principal surface of the base plate includes a pair of sides that face one another, at least the pair of sides having a level difference portion and a castellation, the level difference portion being depressed toward the one principal surface side, the castellation passing through from the another principal surface to the one principal surface, a wiring electrode is at a part of the level difference portion and the castellation, the wiring electrode being extracted from the mounting terminal to the one principal surface of the base plate, and the wiring electrode and the mounting terminal include a metal film and an electroless plating film, the metal film being formed by sputtering or vacuum evaporation, the electroless plating film being formed on the metal film by electroless plating.