Patent ID: 7427822

Claim:
A piezoelectric resonator element package, comprising: a base that holds a piezoelectric resonator element on an internal bottom surface of the base, the piezoelectric resonator element having drive electrodes formed on front and back sides of the piezoelectric resonator element and being arranged such that one of the drive electrodes is opposed to the internal bottom surface of the base; and a cap for hermetically sealing the piezoelectric resonator element, wherein the base includes four electrode pads that electrically connect to the drive electrodes of the piezoelectric resonator element, each of the four electrode pads being formed on a respective corner of the internal bottom surface of the base, the four electrode pads consisting of a first electrode pad, a second electrode pad, a third electrode pad, and a fourth electrode pad, wherein the first electrode pad and the second electrode pad are formed along a predetermined side of the internal bottom surface of the base, the first electrode pad and the third electrode pad are formed along one of two sides that are perpendicular to the predetermined side, the second electrode pad and the fourth electrode pad are formed along the other of the two sides that are perpendicular to the predetermined side, the first electrode pad and the second electrode pad have a different potential, the first electrode pad and the third electrode pad are connected by a first connecting electrode and have a same potential, the second electrode pad and the fourth electrode pad are connected by a second connecting electrode and have a same potential, and wherein avoidance means is provided for avoiding electrical connection between at least one of the first and third electrode pads with at least one of the second and fourth electrode pads, the avoidance means comprising bumps that are formed on the four electrode pads and that are smaller than the electrode pads, at least one of the bumps being formed at a location that does not overlap with the drive electrode that is opposed to the internal bottom surface of the base.