| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystal vibrator and its housing structure which can generate a stable resonance frequency with its small fluctuations, can reduce temporal variation in the generated resonance frequency and improve its frequency precision, and furthermore has advantages such as size reduction, low working cost, and easy designing. SOLUTION: Electrode parts 2 and 3 for excitation are formed on both the surfaces of a crystal substrate 1, and the region sandwiched between the electrode parts 2 and 3 is regarded as an excitation part 4, and axis inversion parts 21, 22 having electric axis (-X) in the opposite directions from the electric axis (X) of the excitation part 4 are formed on both the sides of the excitation part 4 in the crystal substrate 1, and connection terminal parts 25 and 26 which are connected electrically to the electrode parts 2 and 3 are formed outside the axis inversion parts 21 and 22 of the crystal substrate 1.
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