Patent ID: 8987975
Filing Date: 2015-03-24
Classification: H01L,H03H

Abstract:
1. A lead type piezoelectric resonator device comprising: a piezoelectric resonator plate, and a lead terminal that supports the piezoelectric resonator plate and has a circular cross-section, the piezoelectric resonator plate being provided with a terminal electrode that is electrically connected to the lead terminal, and the lead terminal being constituted by a core portion and a bonding layer that is formed on an outer circumference of the core portion so as to cover the core portion and electromechanically bonded to the piezoelectric resonator plate, wherein the piezoelectric resonator plate and the lead terminal are electromechanically bonded to each other by the terminal electrode and the bonding layer, a bonding material that contains an intermetallic compound is produced from the terminal electrode and the bonding layer by the bonding of the terminal electrode and the bonding layer, and the intermetallic compound is eccentrically distributed in a narrowest spacing between the piezoelectric resonator plate and the lead terminal and in a vicinity of the spacing in comparison with an area that surrounds the vicinity.