Patent ID: 7984536

Claim:
A method of manufacturing a piezoelectric resonator in which a casing houses a piezoelectric resonator element, the method comprising: manufacturing the piezoelectric resonator element including: a tuning-fork piezoelectric oscillating piece from whose base portion includes two oscillating arms extending in parallel with each other; excitation electrodes formed on the oscillating arms; adjustment films for frequency adjustment formed on tip sides of the oscillating arms so as to be apart from the excitation electrodes; and a lead electrode formed on the base portion; forming the casing including a wall surface which is provided between an atmosphere where the excitation electrodes are located and an atmosphere where the adjustment films are located and prevents shavings from scattering to the atmosphere where the excitation electrodes are located when the adjustment films are shaved, mounting the piezoelectric resonator element in the casing; and shaving the adjustment films by a laser beam to adjust a frequency of the piezoelectric resonator element in the casing.