Patent ID: 8689415

Claim:
A method for manufacturing a piezoelectric device, comprising: preparing a lid wafer defining multiple lids; preparing a piezoelectric wafer in which are formed multiple piezoelectric vibrating pieces each comprising first and second electrodes; preparing a base wafer made of glass and having a first surface, the base wafer defining multiple bases each comprising first and second metal wires extending through the glass wafer, each wire having a respective end and a respective side surface at the end that protrude at least partially from the first surface; forming a wafer sandwich comprising the base wafer, the piezoelectric wafer superposed on and aligned with the base wafer, and the lid wafer superposed on and aligned with the piezoelectric wafer, such that respective lids, bases, and piezoelectric vibrating pieces are registered with each other, and the protruding ends of the first and second wires contact respective first and second electrodes; anodic bonding the layers of the wafer sandwich together, the anodic bonding also bonding the protruding ends of the first and second wires to the respective first and second electrodes; and cutting the bonded wafer sandwich to separate individual piezoelectric devices thus formed in the sandwich from each other.