| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a mesa type piezoelectric vibration reed enhancing frequency variable sensitivity while suppressing unnecessary vibration, and further to provide a mesa type piezoelectric vibration device using the mesa type piezoelectric vibration reed. <P>SOLUTION: A mesa type piezoelectric vibration reed 10 has a thick walled portion 14 and a thin walled portion 16. Excitation electrodes 22 are disposed on a principal surface of the thick walled portion 14 and on a principal surface of the thin walled portion 16 disposed in a direction extending from the thick walled portion 14 in a displacement direction of main vibration excited by the mesa type piezoelectric vibration reed 10. Further, one ends of the excitation electrodes 22 in the displacement direction of the main vibration, one end of the thick walled portion 14, the other end of the thick walled portion 14 and the other ends of the excitation electrodes 22 are arranged at positions of antinodes of unnecessary vibration. Furthermore, the antinodes of the unnecessary vibration of ends adjacent to each other are alternately different in direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
