Abstract: There is provided a piezoelectric vibrating piece including: a piezoelectric plate that includes a pair of vibrating arm portions, and a base portion which integrally fixes the base end portions of the pair of vibrating arm portions along a length direction; excitation electrodes which are formed on the vibrating arm portions and vibrate the vibrating arm portions; mounting electrodes which are formed on the base portion and mount the piezoelectric plate on external portions using a joining member; and leading-out electrodes which connect the excitation electrodes and the mounting electrodes, in which the leading-out electrodes are formed by folding back several times between the excitation electrodes and the mounting electrodes.

Abstract: A method of manufacturing a piezoelectric vibration reed is provided. The piezoelectric vibration reed includes a pair of vibrating arm portions and a base portion. The pair of vibrating arm portions is disposed in parallel to each other. The base portion is configured to integrally support proximal end portions of the pair of vibrating arm portions in a longitudinal direction of the vibrating arm portions. The method of manufacturing the piezoelectric vibration reed forms a slit-shaped notched portion at a crotch portion located between the proximal end portions of the pair of vibrating arm portions.

Abstract: Provided are a piezoelectric vibrating piece, a piezoelectric vibrator, an oscillator, an electronic device, and a radio-controlled timepiece which can effectively suppress the vibration leakage while maintaining sufficient rigidity of the piezoelectric vibrating piece without making the piezoelectric vibrating piece large-sized. A chamfered portion is formed on corner portions of a connecting portion 21 on a narrow width portion side on both sides in the widthwise direction (Y direction). Due to such chamfered portions, a cross-sectional area (width size) of the connecting portion is gradually reduced toward the narrow width portion from a distal end side (vibrating arm portion side). The chamfered portion may be formed such that an angle ? with respect to side surfaces on both sides of the connecting portion becomes 60° (?=60°).

Abstract: There is provided a piezoelectric vibration reed including a pair of vibrating arm portions arranged in parallel to each other and a base portion integrally fixing proximal end portions in the longitudinal direction of the pair of vibrating arm portions, wherein the pair of vibrating arm portions is formed with first groove portions positioned on the side of the proximal end portions of the vibrating arm portions and second groove portions positioned on the side of distal end portions of the vibrating arm portions with respect to the first groove portions on main surfaces, the width of the first groove portions along the width direction orthogonal to the longitudinal direction of the vibrating arm portions on the main surfaces of the vibrating arm portions is formed to be smaller than the second groove portions, and reinforcing ribs projecting from bottom surfaces of the second groove portions are formed in the second groove portions.

Abstract: There is provided a piezoelectric vibrator including a piezoelectric vibration reed having a pair of vibrating arm portions and a base portion configured to integrally fix proximal end sides of the pair of vibrating arm portions, a base substrate on which the piezoelectric vibration reed is mounted, and a lid substrate joined to the base substrate and configured to accommodate the piezoelectric vibration reed in a cavity defined between the lid substrate and the base substrate, wherein the base substrate is formed with a first engaging portion, and a second engaging portion configured to engage the first engaging portion and guide the piezoelectric vibration reed to a predetermined mount position of the base substrate and position the same is formed on the base portion of the piezoelectric vibration reed.

Abstract: A piezoelectric vibration reed includes a pair of vibrating arm portions arranged in parallel to each other and a base portion. The base portion is integrally coupled to proximal ends of the pair of the vibrating arm portions in a longitudinal direction that the vibrating arm portions extend. The base portion includes a connecting portion, a mount portion, and a narrow portion between the connecting portion and the mount portion. The base portion further includes a pair of notched portions notched respectively inwardly from both sides of the base portion in the width direction and ribs projecting outwardly in the width direction of the base portion and arranged in the interiors of the notched portions.

Abstract: A piezoelectric vibrating strip, a piezoelectric vibrator, an oscillator, an electronic device, and a radio timepiece, in which the CI value can be reduced further while preventing a vibrating arm portion from vibrating in a second warp mode. The piezoelectric vibrating strip includes a plurality of parallel vibrating arm portions in a width direction, a base portion couples base ends of the vibrating arm portions, and a groove portion resides in at least one of a main face and a back face of the vibrating arm portion and extends from proximate the base end toward a free end of the vibrating arm portion. A break portion divides the groove portion and suppresses warp deformation of the vibrating arm portion in a second warp mode between a vibrating node portion of the vibrating arm portion proximate the base end and a vibrating node portion proximate the free end.

Abstract: Mounting electrodes are formed in a state of being separated from excitation electrodes on one main surface of a base portion, and the excitation electrodes are formed on another main surface of a piezoelectric plate and includes base portion electrodes which are connected to the excitation electrodes and conducting portions which electrically connect the mounting electrodes and the base portion electrodes in a thickness direction of the piezoelectric plate.

Abstract: There is provided a piezoelectric vibrating piece including: a piezoelectric plate that includes a pair of vibrating arm portions, and a base portion which integrally fixes the base end portions of the pair of vibrating arm portions along a length direction; excitation electrodes which are formed on the vibrating arm portions and vibrate the vibrating arm portions; mounting electrodes which are formed on the base portion and mount the piezoelectric plate on external portions using a joining member; and leading-out electrodes which connect the excitation electrodes and the mounting electrodes, in which the leading-out electrodes are formed by folding back several times between the excitation electrodes and the mounting electrodes.

Abstract: The present invention provides a novel method of producing piezoelectric vibration pieces in which a plurality of piezoelectric vibration pieces are formed at once from a wafer, using a plurality of photoresist processes. The wafer is marked with wafer marks each unique to a different one of photoresist masks to prevent a wrong use of the photoresist masks during the photoresist processes.

Abstract: Disclosed is a method of manufacturing a piezoelectric vibrating piece. In a resist pattern forming step, a mask member is arranged in a wafer S while a mask-side mark formed in a mask member prepared for one electrode film is aligned with wafer-side marks S3 and S4 corresponding to the mask member. The mask-side mark has exposure openings which pass through the mask member, and the shape of each of the exposure openings in plan view differs between a plurality of mask members. A plurality of wafer-side marks S3 and S4 respectively have concave portions S5 and S6, and the shape of each of the concave portions S5 and S6 differs between a plurality of wafer-side marks S3 and S4 such that the wafer-side marks S3 and S4 have the same shape as the exposure openings in the corresponding mask member in plan view. In the resist pattern forming step, the concave portions S5 and S6 are exposed from the exposure openings to align the mask-side mark with the wafer-side marks S3 and S4.

Abstract: The present invention provides a piezoelectric vibration piece of tuning fork type which comprises a pair of arms extending in parallel to each other from a base. Each of the arms has a weight added section which has at least two bulges projecting in the opposite directions at different longitudinal locations along the respective arm, and the at least two bulges are shaped and located such that both arms are equal in weight and a gravity center of the respective arms is situated on a center line running longitudinally through the respective arms and at a same longitudinal location along the respective arms.