| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a piezoelectric vibration element and a piezoelectric vibration device which can ensure excellent characteristics by suppressing unnecessary vibration.SOLUTION: A first adhesive electrode 7a and a second adhesive electrode 7b are formed along the long sides L1 and L2 of a crystal diaphragm without overlapping in the plan view. A pair of first extraction electrodes 6a, 6a and a pair of second extraction electrodes 6b, 6b are formed in line symmetry with respect to both of two lines CL1, CL2 orthogonal to each other, while passing the centers of two sets of facing sides of excitation electrodes 5a, 5b. The region surrounded by one excitation electrode 5a and the pair of first extraction electrodes 6a, 6a and the first adhesive electrode 7a, and the region surrounded by the other excitation electrode 5b and the pair of second extraction electrodes 6b, 6b and the second adhesive electrode 7b are no electrode regions (11a, 11b) where the body of the crystal diaphragm is exposed.</p> |
