Patent ID: 8032997
Filing Date: 2011-10-11
Classification: H01L,H03H,Y10T

Abstract:
1. A method for manufacturing a plurality of piezoelectric vibrators in which a piezoelectric vibration member is sealed up in a cavity formed between a base substrate and a lid substrate bonded to each other by utilizing a base substrate wafer and a lid substrate wafer, the method comprising: a recess forming step of forming, in the lid substrate wafer, a plurality of cavity recesses for forming cavities when the base substrate and lid wafers are overlaid; a through-electrode forming step of forming a plurality of through-electrodes in and through the base substrate wafer by utilizing an electroconductive tack member having a tabular basis part and a core part extending from the basis part toward a direction nearly perpendicular to a surface of the tabular basis part; a routing electrode forming step of forming a plurality of routing electrodes connected electrically with the through-electrodes, on an upper face of the base substrate wafer; a mounting step of bonding the plural piezoelectric vibration members to the upper face of the base substrate wafer via the routing electrodes; an overlaying step of overlaying the base substrate wafer and the lid substrate wafer thereby to house the piezoelectric vibration members in the cavities surrounded by the recesses and the base substrate and lid substrate wafers; a bonding step of bonding the base substrate wafer and the lid substrate wafer thereby to seal up the piezoelectric vibration members in the cavities; an external electrode forming step of forming a plurality of external electrodes connected electrically with the through-electrodes, on a lower face of the base substrate wafer; and a cutting step of cutting the bonded base substrate and lid substrate wafers thereby to shred them into the plural piezoelectric vibrators; wherein the through-electrode forming step includes: a through-hole forming step of forming a plurality of through-holes in and through the base substrate wafer; a setting step of inserting the core part of the electroconductive tack member into each of these plural through-holes until the basis part is kept in contact with the base substrate wafer, and disposing a connection member formed of a glass material in a space between the core part and each of the through-holes; a firing step of firing the connection member at a predetermined temperature to thereby integrally fix each of the through-holes, the connection member and the tack member to each other; and a polishing step of, after the firing step, polishing at least the upper and lower faces of the base substrate wafer, having the tabular basis part disposed thereon, to thereby remove the tabular basis part and to expose the core part out of both the upper and lower faces of the base substrate wafer.