| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric vibrator excellent in frequency characteristics by implementing a structure, in which electrical connection between a piezoelectric vibration piece and upper/lower substrates can be surely attained by securing airtightness while reducing a temperature at joining, and to provide a method for manufacturing the same. SOLUTION: A crystal oscillator 10 is composed by directly joining together an intermediate crystal plate 11, in which a crystal vibration piece 12 having excitation electrodes 14a and 14b provided on both main surfaces and a frame 13 are integrally formed, and the upper and lower substrates 2 and 3. The excitation electrodes 14a and 14b are, respectively, connected to connection parts 18a and 18b provided to the frame 13 on the opposite-side main surfaces via lead-out electrodes 15a and 15b and frame through-holes 50a and 50b. Solder 90 is buried in substrate through-holes 60a and 60b provided so as to be electrically connected to respective external connection terminals 8a and 8b in each of the upper and lower substrates 2 and 3. The excitation electrodes 14a and 14b are thereby conductive to the external connection terminals 8a and 8b, respectively. COPYRIGHT: (C)2011,JPO&INPIT
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