Patent ID: 8448311
Filing Date: 2013-05-28
Classification: 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) forming a pair of penetration electrodes through respective at least some of the first substrates on the first wafer; (c) 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 bonding film sandwiched between the first and second substrates in respective pairs of at least some of coinciding first and second substrates, wherein a piezoelectric vibrating strip is secured in respective pairs of the at least some of coinciding first and second substrates; (d) placing, on a base plate, the first wafer layered with the second wafer, with an intermediate plate placed between the base plate and the first wafer, wherein the intermediate plate is made of a material in which inner ions are movable at a bonding temperature; (e) applying, at the bonding temperature, a bonding voltage across the base plate and respective at least some of the bonding films to anodically bond the first and second substrates of the at least some of the respective pairs of the coinciding first and second substrates.