Patent ID: 8444801

Claim:
A method for producing piezoelectric vibrators each containing a piezoelectric vibrating strip inside, comprising: (a) defining a plurality of first substrates on a first wafer and a plurality of second substrates on a second wafer; (b) forming a bonding film on the first wafer and the second wafer; (c) layering, between a boding electrode and a table, the first and second wafers such that one of the first substrates on the first wafer substantially coincides with a corresponding second substrate of the second substrates on the second wafer, with the bonding film being placed between a plurality of pairs of coinciding first and second substrates, wherein the bonding electrode comprises a plurality of electrode members one inside another; (d) forming a piezoelectric vibrator comprising the pair of coinciding first and second substrates and the piezoelectric vibrating strip; and (e) anodically bonding the first wafer and the second wafer by applying a bonding voltage to the bonding electrode in such a manner as to turn on and off the electrode members sequentially from an inner electrode member to an outer electrode member.