Method of manufacturing a piezoelectric resonator

Details Method of manufacturing a piezoelectric resonator Method of manufacturing a piezoelectric resonator

2011-07-26

2011-07-26

Tugbang, A. Dexter (Department: 3729)

Metal working

Piezoelectric device making

C310S312000, C310S344000, C310S370000, C219S121680, C219S121690

Reexamination Certificate

active

07984536

ABSTRACT:
To provide a piezoelectric resonator in which a casing houses a tuning-fork piezoelectric resonator element and whose failure occurrence caused when shavings of adjustment films scatter and adhere to excitation electrodes is prevented. In a method of manufacturing a quartz-crystal resonator in which a casing20houses a quartz-crystal resonator element10including a tuning-fork quartz-crystal piece11, excitation electrodes6a,6b,6c, and adjustment films8for frequency adjustment, a wall surface29preventing shavings of the adjustment films8from scattering is formed between an atmosphere where the excitation electrodes6a,6b,6care located and an atmosphere where the adjustment films8are located inside the casing20, and when the adjustment films8are shaved by a laser beam in order to adjust the frequency of the quartz-crystal resonator element10, the wall surface29prevents the scattering shavings from adhering to the excitation electrodes6a,6b,6cand causing a short circuit thereof, thereby reducing the occurrence of a failure.

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