Patent ID: 8281468

Claim:
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) forming at least one through hole in respective at least some of the first substrates, wherein a respective the at least one through hole comprises an electrode hole and an excess filler hole which is continuous from the electrode hole and open in a first surface of the first wafer; (c) providing filler paste in the electrode hole and the excess filler hole of a respective at least some of the through holes; (d) firing the first wafer to harden the filler paste in the at least some of the through holes; (e) removing the first surface of the first wafer to reduce a thickness of the first wafer to substantially eliminate the excess filler holes from the first wafer and expose the hardened filler paste at the first surface of the first wafer; (f) 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, wherein a piezoelectric vibrating strip is secured in a respective at least some of the coinciding first and second substrate pairs; and (g) hermetically bonding at least some of the coinciding first and second substrate pairs.