Patent ID: 8069543

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 on the first wafer; (c) filling at least some of the through-holes with conductive beads mixed with conductive binder paste comprising conductive fibers; (d) firing the first wafer to harden the binder paste in the at least some of the through-holes to hermetically close the through-holes, wherein the conductive beads have a melting point higher than a temperature at which the first wafer is fired; (e) 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; (f) hermetically bonding at least some of the coinciding first and second substrate; (g) cutting off a respective at least some of the hermetically bonded pairs from the first and second wafers.