Patent ID: 8087135
Filing Date: 2012-01-03
Classification: G04F,H03H,Y10T

Abstract:
1. A method for producing piezoelectric vibrators, comprising: (a) defining a plurality of first substrates on a first wafer and a plurality of second substrates on a second wafer; (b) layering the first and second wafers such that at least some of the first substrates substantially coincide respectively with at least some of the corresponding second substrates, with a piezoelectric vibrating strip being secured in a respective at least some of the coinciding first and second substrate pairs, wherein a getter material is placed inside a respective at least some of the coinciding first and second substrate pairs which each include the piezoelectric vibrating strip inside; (c) anodically bonding at least some of the coinciding first and second substrate pairs which each include a getter material inside via a bonding electrode patterned between the first and second substrates, wherein at least some of the bonded first and second substrate pairs each have a pair of power-supply electrodes inside for supplying electricity to vibrate the piezoelectric vibrating strip therein, and the power-supply electrodes in a respective at least some of the bonded first and second substrate pairs which each include the pair of power-supply electrodes being electrically isolated from the bonding electrode patterned in the same first and second substrate pair and electrically accessible from outside of the substrates; (d) supplying electricity to a respective at least some of the bonded first and second substrate pairs which each include the pair of power-supply electrodes via the power-supply electrodes to vibrate the piezoelectric vibrating strip inside and detecting a series resonance resistance of the vibrating piezoelectric vibrating strip; (e) heating the getter material in a respective at least some of the bonded first and second substrate pairs to which electricity is supplied in order to adjust the detected series resonance resistance of the piezoelectric vibrating strip therein; and (f) after step (e) cutting off from the first and second wafers a respective at least some of the bonded first and second substrate pairs whose series resonance resistances is adjusted.