Patent ID: 8421546

Claim:
A method of manufacturing a plurality of piezoelectric vibrators, in which a piezoelectric vibrating reed is sealed in a cavity formed between a base substrate and a lid substrate bonded to each other, at a time using a base substrate wafer and a lid substrate wafer, comprising: a setting process in which, after preparing a forming mold including a lower mold and an upper mold having a pin, which protrudes toward the lower mold and has a taper-shaped section in which a taper angle is in a range of 15 degree or more and 20 degree or less, the base substrate wafer is set between the lower mold and the upper mold; a pressing process in which the upper mold and the lower mold are press-molded in a state in which the base substrate wafer is heated to a predetermined temperature and is softened, and a through hole is formed in the base substrate wafer using the pin; a baking process in which, after the base substrate wafer is subjected to a cooling solidification, the through hole is blocked by burying the conductive paste in the through hole, and then, the conductive paste is baked to a predetermined temperature and is hardened, thereby forming a through electrode of a taper-shaped section; a mounting process in which the piezoelectric vibrating reed is bonded to an upper surface of the base substrate wafer so as to be electrically connected to the through electrode; a bonding process in which the base substrate wafer and the lid substrate wafer are overlapped and bonded with each other, thereby sealing the piezoelectric vibrating reed in the cavity; an external electrode forming process in which an external electrode is formed on a lower surface of the base substrate wafer so as to be electrically connected to the through electrode; and a cutting process in which both of the bonded wafers are cut to form a plurality of small pieces of the piezoelectric vibrators.