Patent ID: 8615857

Claim:
A method for producing piezoelectric vibrators each containing a piezoelectric vibrating strip inside, comprising: (a) defining, along imaginary boundary lines, a plurality of first substrates on a first wafer and a plurality of second substrates on a second wafer; (b) layering, between a bonding electrode and a table, 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 being placed between respective pairs of at least some of the coinciding first and second substrates; (c) hermetically bonding the first and second substrates of at least some of the respective pairs via the bonding film; (d) cutting off each of at least some of the hermetically bonded pairs, which includes removing the bonding the bonding film lying on the boundary lines and scribing the first wafer with a laser along the boundary lines to form grooves with a ratio of whose width and depth ranges from 0.8 to 6.0, in which the scribing is performed after the removing the bonding film.