PIEZOELECTRIC VIBRATION ELEMENT AND PIEZOELECTRIC VIBRATION DEVICE

• Main Author: GOTO MASAHIKO
• Format: Patent
• Language: English; Japanese
• Published: 05.07.2018
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

PROBLEM TO BE SOLVED: To provide a piezoelectric vibrating element capable of improving characteristics.SOLUTION: A crystal vibrating element 5 has a plate-like quartz-crystal piece 15 and a pair of excitation electrodes 17 facing each other with the quartz-crystal piece 15 interposed therebetween. In planar perspective, a second excitation electrode 17B is wider than a first excitation electrode 17A and overlaps the entire first excitation electrode 17A. The distance from the outer edge of the first excitation electrode 17A to the outer edge of the second excitation electrode 17B varies depending on the position along the outer edge of the first excitation electrode 17A.SELECTED DRAWING: Figure 3 【課題】特性を向上させることができる圧電振動素子を提供する。【解決手段】水晶振動素子５は、板状の水晶片１５と、水晶片１５を挟んで互いに対向している１対の励振電極１７とを有している。平面透視において、第２励振電極１７Ｂは、第１励振電極１７Ａよりも広く、第１励振電極１７Ａの全体に重なっており、第１励振電極１７Ａの外縁から第２励振電極１７Ｂの外縁までの距離は、第１励振電極１７Ａの外縁に沿う位置によって異なっている。【選択図】図３