| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystal oscillator for preventing changes in a vibration characteristic due to a frequency adjusting film. SOLUTION: The crystal oscillator is configured, such that a vibration region is formed by forming exciting electrodes to both principal sides of a crystal chip and opposed to each other on both the sides and the frequency-adjusting film is provided onto the vibration region by vapor-deposition, a reinforcing layer whose area is greater than that of the vibration region and having a strong adhesive force to the crystal chip and the exciting electrode is provided onto the vibration region, and the frequency-adjusting film is provided onto the reinforcing layer. Further, the exciting electrodes are made of Au, Ag or Al, the reinforcing layer is made of Cr, Ni or Ti and the thickness of the reinforcing layer is configured to be 500Åor smaller. COPYRIGHT: (C)2006,JPO&NCIPI
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