Patent ID: 8760235
Filing Date: 2014-06-24
Classification: H03B,H03H

Abstract:
1. A resonator element comprising: a base portion; and at least one resonating arm extending from the base portion, wherein the resonating atm has a mechanical resonance frequency which is higher than a thermal relaxation frequency thereof, the resonating arm has a groove portion which is formed on at least one of the principal surfaces facing each other and which extends in a longitudinal direction of the resonating arm, the groove portion includes a bottom portion, a first side surface that extends along the longitudinal direction of the resonating arm and comes into contact with the opened principal surface and the bottom portion, and a second side surface that faces the first side surface with the bottom portion disposed therebetween and comes into contact with the opened principal surface and the bottom portion, and the groove portion has a non-electrode region which extends from a part of the first side surface close to the bottom portion to a part of the second side surface close to the bottom portion and in which no electrode is provided.