| 摘要 |
PROBLEM TO BE SOLVED: To provide a small and inexpensive piezoelectric oscillator by separating a chip type piezoelectric vibrator from a pedestal which stores a circuit element containing an amplifier and also forming a store recess on the back of the pedestal. SOLUTION: A crystal oscillator comprises a chip type crystal vibrator 1, a pedestal 5 where the vibrator 1 is mounted and an IC 41, i.e., a circuit element that is attached to the store recess formed on the back of the pedestal 5. The vibrator 1 includes a ceramic package 10, a crystal vibration plate 3 which is stored in the package 10 and a cover 2 which seals airtightly the plate 3. The pedestal 5 is made of the ceramic of alumina, etc., and the connecting electrodes 51-54 are formed on the top surface of the pedestal 5 to be connected to the lead-out electrodes 14 and 15. Furthermore, plural external connecting electrodes and the store recess which is opened downward are formed on the back of the pedestal 5, and plural electrode pads are formed in the store recess part and connected properly and electrically to the electrodes 51-54 and the external connecting electrodes.
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