Patent ID: 8294338
Filing Date: 2012-10-23
Classification: G01P,H01L,H03H

Abstract:
1. A piezoelectric resonator element composed of a Z-cut piezoelectric plate in which two main planes regulating thickness cross a Z axis, comprising: a resonating arm, of which one end side, in a longitudinal direction, is a free end in a non-fixed state; a base portion that fixes another end side, in the longitudinal direction, of the resonating arm; a first groove that is arranged on a main plane of the +Z plane side of the resonating arm, along the longitudinal direction, and has a bottom in a shape in which it is cut out from the main plane in the thickness direction; and a second groove that is arranged on a main plane of the −Z plane side of the resonating arm, along the longitudinal direction, and has a bottom in a shape in which it is cut out from the main plane in the thickness direction; wherein