Patent ID: 8610337

Claim:
In a piezoelectric device formed by bonding a lid, a piezoelectric plate including a piezoelectric vibrating piece on which an excitation electrode is formed and an extraction electrode extracted from the excitation electrode, and a base having a through-hole extending from an outside surface to an inside surface of the base, the base comprising: a connecting electrode connected to the extraction electrode at the inside surface facing the piezoelectric plate; a through hole electrode formed on the through hole and electrically connected to the connecting electrode; a first external electrode layer electrically connected to the through hole electrode and formed on the outside surface of the base; a sealing material for sealing the through hole electrode; and a second external electrode layer formed so as to cover the first external electrode layer and the sealing material, wherein the connecting electrode, the through hole electrode, and the first external electrode layer comprises a first base layer and a first top layer, and the first base layers of the connecting electrode, the through hole electrode, and the first external electrode are formed at once and the first top layers of the connecting electrode, the through hole electrode, and the first external electrode are formed at once.