Patent ID: 8436515

Claim:
A piezoelectric vibrator comprising: a hermetically closed casing comprising first and second substrates with a cavity therebetween, wherein at least one of the first and second substrates comprises a translucent material; a bonding film comprising a gettering material and extending over at least part of a surface of at least one of the first and second substrates which faces the other substrate, wherein the first and second substrates are anodically bonded via the bonding film; and a piezoelectric vibrating strip secured inside the cavity and comprising an adjustable weight metal film at the tip end thereof, wherein the adjustable weight metal film comprises a series of laser irradiation marks, wherein the bonding film has a corresponding number of laser irradiation marks at corresponding locations to a number and locations of the series of laser irradiation marks of the adjustable weight metal film, and both of the irradiation marks of the bonding film and the adjustable weight metal film are formed by simultaneous irradiations of laser.