Patent ID: 8816573
Filing Date: 2014-08-26
Classification: G04R,H03H

Abstract:
1. A piezoelectric vibration piece comprising: a pair of vibrating arms each having a distal end and a proximal end; a base having the proximal ends of the vibrating arms connected thereto, the base and the pair of vibrating arms comprising portions of a crystal substrate; a groove in each of the vibrating arms along a length thereof, wherein the groove has a first end toward the distal end and a second end toward the proximal end, and a width of the groove at the first end is greater than the width of groove at the second end, wherein the base comprises a mount section and an intermediate section, where a width of the intermediate section is less than a width of the mount section, and the mount section and the intermediate section are connected by sloped side surfaces that are aligned with a crystal axis of the crystal substrate.