TUNING-FORK TYPE CRYSTAL VIBRATOR

• Main Authors: KAWANISHI SHINGO, SATO YOSHITERU
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2018
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

PROBLEM TO BE SOLVED: To provide a tuning-fork type crystal vibrator having excellent electrostatic breakdown voltage characteristics.SOLUTION: A tuning-fork type crystal vibrator 20 includes: a base 11; a first vibration arm 13a; a second vibration arm 13b; a support arm 15; a first excitation electrode 21a; and a second excitation electrode 21b. The first excitation electrode is adapted to be dragged from a first connection pad 19ax to a side surface of the first vibration arm through an area composed of part of a principal surface of the support arm and part of a side surface of the first vibration arm, an inner bottom surface of a first crotch section 17a located between the support arm and the first vibration arm, and a peripheral section of the first crotch section of the base. The second excitation electrode 21b is dragged at a second crotch section 17b side in the same way as the first excitation electrode.SELECTED DRAWING: Figure 3 【課題】静電耐圧特性に優れる音叉型水晶振動子を提供する。【解決手段】音叉型水晶振動子２０は、基部１１、第１の振動腕及１３ａ、第２の振動腕１３ｂ、支持腕１５、第１の励振用電極２１ａ及び第２の励振用電極２１ｂを具える。第１の励振用電極は、第１の接続パッド１９ａｘから、支持腕の主面の一部及び第１の振動腕側の側面の一部と、支持腕及び第１の振動腕の間に在る第１の股部１７ａの内底面と、基部の第１の股部の周囲の部分と、から成る領域を経由して、第１の振動腕の側面に至るように引き回してある。第２の励振用電極２１ｂは、第２の股部１７ｂ側において、第１の励振用電極同様に、引き回してある。【選択図】図３