Patent ID: 8898875
Filing Date: 2014-12-02
Classification: G04R,H03H,Y10T

Abstract:
1. 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) layering the first and second wafers one directly over the other such that at least some of the first substrates substantially coincide respectively with at least some of the corresponding second substrates, wherein only one layer of bonding film is sandwiched between a respective at least some of the coinciding first and second substrate pairs; (c) placing the layered first and second wafers between an auxiliary bonding layer and an electrode so as to sandwich opposing outer surfaces of the layered first and second wafers between the auxiliary bonding layer and the electrode in a thickness direction of the layered first and second wafers; (d) applying a voltage across the auxiliary bonding layer and the electrode to (i) anodically bond at least some of the coinciding first and second substrate pairs which each include the bonding film therebetween and (ii) anodically bond the auxiliary bonding layer to one of the outer surfaces of the layered first and second wafers; and (e) removing the anodically bonded auxiliary bonding layer from the one of the outer surfaces of the layered first and second wafers.