| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric device, especially, a crystal oscillator whose miniaturization can be promoted, and whose change characteristics in time can be made satisfactory. SOLUTION: In a piezoelectric device formed by sealing a crystal piece in a container itself constituted of laminated ceramics, a dent is formed on the edge face being the outer surface of the laminated ceramics constituted as at least a three-layer structure, and electrode terminals are formed on the edge faces of the upper and lower layers in the three layer structure while the edge face of the intermediate layer is used as a non-electrode, and the electrodes of a chip element are connected with the electrode terminals of the laminated ceramics, and the chip element is housed in the dent. Also, the piezoelectric device is formed as a crystal oscillator in which the IC chip is loaded on the container itself, and the chip element is formed as a by-pass capacitor between a power source and ground. Also, the piezoelectric device is formed as the crystal oscillator in which the IC chip is loaded on the container itself, and the chip element is formed as a high frequency coupling capacitor.
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