小型GTカット水晶振動子について

概要

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This paper describes the shape, size and frequency-temperature characteristics of a miniaturized GT cut quartz resonator. We have developed a new GT cut quartz resonator, which is greatly miniaturized, highly shock resistant and has excellent frecuency-temperature characteristics over a wide temperature range. In order to obtain sufficient processing accuracy, this quartz resonator is manufactured by a litho-graphic prosess. The optimum shape and size for this quartz resonator have been analyzed by the finite element method. According to the result of the analysis, we have manufactured resonators. This paper also describes how to adjust resonant frequency of a width-extensional vibration and frequency-temperature coefficients of a GT-cut quartz resonator. A coupling condition between two vibrational modes is almost determined by a cut angle and a ratio of width to length, so-called, a dimensional ratio. It is, however, impossible to avoid a distribution of the resonant frequency and the frequency- temperature coefficients caused by manufacturing. Therefore, we have been making a study of how to adjust the frequency-temperature coefficients, by adding weights on a vibrational portion, or eliminating weights of the vibrational portion, and simultaneously, how to adjust the resonant frequency of the width-extensional vibration mede.
社団法人日本時計学会の論文
1983-03-25