PIEZOELECTRIC PART MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a piezoelectric part manufacturing method by which a frequency change before and after soldering to a substrate is small, and by which a time can be reduced until a frequency becomes stable. SOLUTION: A piezoelectric part manufacturing method includes a process of soldering lead terminals 20-22 to terminal electrodes of a piezoelectric element 1, a process of obtaining piezoelectric parts by spreading an armoring resin 30 around the piezoelectric element 1 in which the lead terminals are soldered and by curing the resin, a process of performing heat aging to the piezoelectric parts after curing the resin, a process of leaving the parts at room temperature until the characteristic of the piezoelectric element 1 becomes stable after the heat aging, and a process of selecting the parts by measuring the characteristic of the piezoelectric element 1 after leaving the parts at room temperature. By performing the heat aging at a stage of a completed product, a frequency change upon flow soldering at a subsequent process is made small, and a frequency is promptly made stable. COPYRIGHT: (C)2004,JPO