Patent ID: 6992424
Filing Date: 2006-01-31
Classification: H03H

Abstract:
1. A piezoelectric vibrator primarily vibrated by thickness shear vibration comprising a vibrator element portion formed of single crystal lithium tantalate, and an exciting electrode provided on said vibration element portion; wherein a thickness direction of said vibrator element portion forms an angle of 0°±5° to the X-axis of said single crystal, a longitudinal direction of said vibrator element portion lies, with said X-axis used as a rotation axis, in a direction ×57°±2° clockwise from the Y-axis of said single crystal, a ratio L/H of the length L of said vibrator element portion to the thickness H is not less than 15, and a ratio Le/H of the length Le of said exciting electrode to the thickness H of said vibrator element portion is 3–6.