Patent ID: 7570135
Filing Date: 2009-08-04
Classification: H03H,Y10T

Abstract:
1. A method of producing a piezoelectric vibrator having an airtight terminal comprised of an annular stem, a lead disposed to pass through the stem and formed of a conductive material, and a filler for fixing the lead in the stem, the piezoelectric vibrator having a vibrating piece connected to the lead of the airtight terminal and a case bonded to the airtight terminal to cover the vibrating piece, the method comprising: an airtight terminal production process that produces the airtight terminal on a lead frame; and a piezoelectric vibrator assembly process that assembles the piezoelectric vibrator using the produced airtight terminal and on the same lead frame on which the airtight terminal is produced, the piezoelectric vibrator assembly process comprising the following steps: a contour formation step of selecting a plate- or strip-shaped conductive material for use as the lead frame, disposing a contour formation portion for forming a contour of the lead for the airtight terminal and a base on the lead frame, forming a plurality of contours of the lead of the airtight terminal with one end thereof connected to the base by a connection at predetermined intervals, and forming a plurality of contours of an insulated connection with the one end thereof connected to the base on the contour formation portion with the insulated connection facing the lead so that each of the plurality of contours of the insulated connection is paired with each of the plurality of contours of the lead; a filler shaping and sintering step of filling the lead having the contours thereof formed with the filler in a predetermined position and shaping the filler, filling the lead with the filler and shaping the filler to connect the one end of the lead to a non-base side of the insulated connection having the contours thereof formed, and sintering the two fillers shaped; a stem mounting step of mounting the stem on a circumference of the fillers sintered, the fillers sintered being located on the lead; a firing step of heating, melting and cooling the filler in the stem and the filler at the insulated connection; a partial cutting step of cutting off a portion connected to the base of the lead; and a metal film formation step of forming a metal film on a surface of the lead and a surface of the stem.