Patent ID: 8341814
Filing Date: 2013-01-01
Classification: H03H,Y10T

Abstract:
1. A method for manufacturing a piezoelectric device, comprising: preparing a base wafer defining an array of multiple bases, in which array at least one respective through-hole is defined between the adjacent bases, each through-hole extending through a thickness dimension of the base wafer; preparing a piezoelectric wafer defining an array of multiple piezoelectric frames corresponding to the array of bases, each of the piezoelectric frames comprising a respective piezoelectric vibrating piece, a respective frame portion including a surface that is alignable with and bondable to the respective base, at least one respective excitation electrode, and at least one respective extraction electrode, each of the extraction electrodes having a portion that is located on the surface of the respective frame portion, that is electrically connected to a respective excitation electrode, and that extends to the respective through-hole whenever the base wafer is aligned with and bonded to the piezoelectric wafer; on each of the piezoelectric frames, applying an adhesive to the surface of the respective frame portion facing the respective base, the surface including a corresponding surface of the respective extraction electrode; aligning the piezoelectric wafer with the base wafer and bringing the wafers together to contact corresponding surfaces of the base wafer with the adhesive; curing the adhesive to bond the piezoelectric wafer and the base wafer together, thereby providing each of the through-holes with a bottom defined by the surface of the respective frame portion; removing adhesive from the bottom of each of the through-holes to produce an edge surface of the adhesive and expose a portion of the respective extraction electrode situated at the bottom of the through-hole; and on an outer surface of each base, forming a respective external electrode for each of the extraction electrodes such that the external electrode is electrically connected to the respective extraction electrode by extending into the respective through-hole and covering the edge surface of the adhesive and the exposed portion of the respective extraction electrode.