Thickness shear vibrator

Abstract

Abstract PURPOSE:To prevent spurious width resonance from being generated even if length/width/thickness is selected optionally by providing an electrode to a face opposite in a direction crossing the lengthwise direction and making the polarized direction within the range of 45 deg.-90 deg. to the lengthwise direction. CONSTITUTION:Vapor-deposition electrodes 4A, 4B are applied to faces opposite to each other in direction crossing the lengthwise direction of a piezoelectric ceramic thin and long body 3 formed from a piezoelectric ceramic block formed by shaping and baking a piezoelectric ceramic such as Pb(Zr, Ti)O3 group through the processings such as slice, lap and cutout. The spurious resonation hardly takes place even with considerable degree of miniaturization by applying the polarization of the piezoelectric ceramic thin and long body 3 in a direction at a right angle to the lengthwise direction of the thin and long body 3 as whosn in the arrows. Moreover, the effect suppressing generation of spurious sub-resonance is obtained up to the degree of nearly 45 deg. of polarization direction in the lengthwise direction A.

Inventors

• 👤 Masaharu Kanbara
• 👤 正治 神原
• 👤 Hiroshi Saito
• 👤 斉藤　裕志

Bibliographic Details