Patent ID: 8994253
Filing Date: 2015-03-31
Classification: G04C,G04R,H01L,H03B,H03H

Abstract:
1. A piezoelectric vibrating piece comprising: a pair of vibrating arm portions parallel to each other and extending in a longitudinal direction and having proximal end sides; and a base portion including: a connecting portion having a length in a widthwise direction orthogonal to the longitudinal direction and having the proximal end sides of the vibrating arm portion fixed thereto; a mount portion having a length in the widthwise direction orthogonal to the longitudinal direction and configured to mount the base portion; and a narrow width portion between the connecting portion and the mount portion and having a length thereof in the widthwise direction orthogonal to the longitudinal direction that is smaller than the length of the connecting portion and the length of the mount portion, wherein the connecting portion and the narrow width portion further include opposing side surfaces, a distance between an opposing side surface of the connecting portion and an adjacent opposing side surface of the narrow width portion in the widthwise direction is NW, and the opposing side surfaces of the connecting portion include a chamfered edge extending from the opposing side surface of the connecting portion along the longitudinal direction to a terminal point, and a distance between the opposing side surfaces of the connecting portion and the terminal point in the widthwise direction is NC, and NC is greater than or equal to one half of NW.