PIEZOELECTRIC VIBRATING REED, PIEZOELECTRIC VIBRATOR, OSCILLATOR, ELECTRONIC APPARATUS, RADIO-CONTROLLED CLOCK, AND METHOD FOR MANUFACTURING PIEZOELECTRIC VIBRATING REED

摘要

PROBLEM TO BE SOLVED: To provide a piezoelectric vibrating reed which has low disconnection possibility and ensures reliability for stable operation without strictly pursuing exposure position accuracy.

SOLUTION: The piezoelectric vibrating reed 1 includes: vibrating arms 3 and 4; a base 5 to which base ends of the vibrating arms are fixed; grooves 6 formed on principal surfaces of vibrating arms; and excitation electrodes 10 and 11 by which vibrating arms are vibrated; wherein the excitation electrodes each include a principal-surface electrode 20, a side-face electrode 21 and a connection electrode 22, wherein the principal-surface electrodes are formed such that a horizontal width W1 on the base end sides of the vibrating arms is formed smaller than a horizontal width W2 in other portions so that a vacant area S is secured on the principal surface of each of the vibrating arms in the vicinity of a fork portion 15, and the connection electrode is formed to have a large width on the principal surface of each of the vibrating arms to come close to an opening end side of each of the grooves by using the vacant area.

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