| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a piezoelectric vibration device of a sandwich structure capable of eliminating gas generation and further achieving lower height and smaller size.SOLUTION: A crystal oscillator 101 is provided with a crystal diaphragm 2, a first sealing member 3, and a second sealing member 4. The first sealing member 3 is formed with a sealing-side first bonding pattern for bonding to the crystal diaphragm 2. The second sealing member 4 is formed with a sealing-side second bonding pattern for bonding to the crystal diaphragm 2. One principal surface 211 of the crystal diaphragm 2 is formed with an oscillation-side first bonding pattern for bonding to the first sealing member 3. The other principal surface 212 of the crystal diaphragm 2 is formed with an oscillation-side second bonding pattern for bonding to the second sealing member 4. The sealing-side first bonding pattern is diffusion-bonded to the oscillation side first bonding pattern, and the sealing-side second bonding pattern is diffusion-bonded to the oscillation side second bonding pattern.</p> |
