Electronic device having a piezoelectric vibrating reed with a discontinuous electrode film

A piezoelectric vibrating reed having a serial resonance resistance value that is substantially independent of relative structural dimensions, the vibrating reed comprising:

• a piezoelectric plate having a pair of vibrating arms extending parallel to each other, a base portion integrally fixing the pair of vibrating arms thereto at a base end side thereof, and groove portions on principal surfaces of the pair of vibrating arms, the groove portions having the same length from base end portions toward tip end portions of the vibrating arms;
• and
• an electrode film comprising a base metal layer and a finishing metal layer, the electrode film laminated on outer surfaces of the piezoelectric plate in an electrode pattern configured to vibrate the pair of vibrating arms when a predetermined voltage is applied thereon,
• wherein the electrode film comprises a single layer of base metal in the groove portions and regions of the vibrating arms in immediate proximity to the groove portions.