| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a piezoelectric device capable of performing temperature compensation with high accuracy by suppressing frequency fluctuation.SOLUTION: In a crystal oscillator 1, a crystal element 3 having an excitation electrode 30 (30a, 30b) on front and rear main surfaces is housed in the upper recess E1 of a container body 2, an IC 4 is housed in the lower recess E2 of the container body 2, and the upper recess E1 is airtightly sealed by a lid 5. One end 10 of a via hole 2 electrically connected to an IC mounting pad is exposed in a position not overlapped with the excitation electrode 30 on an inner bottom surface of the upper recess E1 in a plan view and also in the vicinity of a pair of crystal element mounting pads 7, 7.</p> |
