Patent ID: 8604675

Claim:
A piezoelectric resonator comprising: a base made of glass or crystal; a cover made of the same material as that of said base and forming an airtight space by airtightly sealing one surface side of said base; a piezoelectric resonating piece, in the airtight space, placed on said base and having excitation electrodes formed on a front surface thereof and having first and second electrode terminals that are electrically connected to the excitation electrodes, the first and second electrode terminals being provided on a surface of the piezoelectric resonating piece faced to the base; first and second projection portions formed at positions corresponding to the first and second electrode terminals on said piezoelectric resonating piece respectively by etching said base and whose upper surfaces are flat; a metal film formed on front surfaces of said projection portions and electrically connected to external terminals; and a conductive adhesive coated on an entire upper surface of each of the first and second projection portions for electrically connecting said metal films and the electrode terminals on said piezoelectric resonating piece respectively; and wherein the first and second projection portions are provided independently of each other and have shapes that continuously spread out downward from the upper surfaces, around an entire perimeter of the first and second projection portions.