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: A piezoelectric vibrator is provided in which a piezoelectric vibrating piece is accommodated in a package, the piezoelectric vibrating piece including: a pair of vibrating arm sections; a base section to which each base end of the pair of vibrating arm sections is connected; and a support arm section that is connected to the base section between the pair of vibrating arm sections and extends from the base section to the same side as the vibrating arm sections, in which the piezoelectric vibrating piece is supported within the package in mount sections provided in the support arm section, and in which the mount sections are provided in a region which is defined between a position of which a distance from an end section of the base section opposite to the side where the support arm section is connected to the side of a leading end of the support arm section is 25% of a width dimension of the base section along the width direction and a position of which the distance is 65% of the width dimension.

Abstract: A piezoelectric vibrating piece includes a pair of vibrating arm portions which are arranged with a center axis interposed therebetween, a base portion which is arranged between a pair of vibrating arm portions and fixed to the outside, and a pair of connecting portions which connect proximal end portions of a pair of vibrating arm portions and a proximal end portion of the base portion. The distance between distal end portions of the vibrating arm portions and the center axis is smaller than the distance between the proximal end portions of the vibrating arm portions and the center axis.

Abstract: A piezoelectric vibrating piece, a piezoelectric vibrator, an oscillator, an electronic apparatus and a radio timepiece capable of reducing the size while suppressing reduction of rigidity and having excellent vibration characteristics. The piezoelectric vibrating piece includes a pair of vibrating arm portions in parallel to each other, a base portion integrally fixing base end portions of the pair of vibrating arm portions in a length direction, groove portions on main surfaces of the pair of vibrating arm portions and extending along the length direction, where each of the groove portions includes a first groove portion near a tip portion end of the vibrating arm portions and a second groove portion near the base end portion side of the vibrating arm portions with respect to the first groove portion, and the second groove portion is offset in a ?X axis direction with respect to the first groove portion.

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 method of manufacturing packages having contents sealed therein, including: a step of forming cavities in a plurality of package forming areas on a first wafer; a step of bonding the first wafer and a second wafer while arranging the contents in the cavities; and a step of irradiating a bonded wafer member with a laser and separating the packages into pieces, characterized in that dummy cavities are formed on an outside of the package forming area in an outermost periphery of the first wafer in the cavity forming step.

Abstract: To fabricate a plurality of piezoelectric vibrating pieces while firmly preventing a defect, a crack, or a breakage from being brought about at a wafer in the midst of fabrication, there is provided a method of fabricating a piezoelectric vibrating piece which is a method of fabricating a plurality of piezoelectric vibrating pieces from a wafer S, the method including a film forming step of respectively forming metal films M on both faces of the wafer, a patterning step of removing a region of the metal film on an inner side of an outer peripheral end of the wafer by a constant distance H, thereafter, patterning the metal film M to outer shapes of the plurality of piezoelectric vibrating pieces, an outer shape forming step of forming outer shapes of the plurality of piezoelectric vibrating pieces at the wafer a size of which is reduced by an amount of the constant distance by selectively removing the wafer by wet etching by constituting a mask by the patterned metal film, and a removing step of removing the m

Abstract: A piezoelectric vibrating reed includes: a pair of vibrating arm portions arranged in a line; an outer groove portion and an inner groove portion formed on both principal surfaces of the vibrating arm portions so as to extend along the Y direction (longitudinal direction) of the vibrating arm portions; and a base portion to which the pair of vibrating arm portions are connected, in which a plurality of groove portions is formed so as to be arranged in a line in the X direction (width direction) of the vibrating arm portions.

Abstract: A piezoelectric vibrating piece including: a pair of vibrating arm sections which has a groove section, respectively; a base section which is disposed between the pair of vibrating arm sections; and a connecting section which connects each base end of the pair of vibrating arm sections and the base section. If a length from a base end to a leading end of the vibrating arm section in a longitudinal direction of the vibrating arm section is Lv, and a length from the base end of the vibrating arm section to an end of the connecting section on the opposite side to the vibrating arm section is Lc, a relationship of Lc/Lv?0.1 is satisfied.

Abstract: A piezoelectric vibrating piece is provided including: a pair of vibrating arm sections; a base section which is provided between the pair of vibrating arm sections; and connecting sections which connect base end sections of the pair of vibrating arm sections and a base end section of the base section, in which the vibrating arm sections have bending points and the vibrating arm sections extend in a direction away from the base section from the base end sections of the vibrating arm sections to the bending points, and the vibrating arm sections extend along the base section from the bending points to leading end sections of the vibrating arm sections.

Abstract: A piezoelectric vibrating piece includes: a pair of vibrating arm sections which are disposed at a distance away from each other in a width direction of a base section; the base section to which each base end of the pair of vibrating arm sections is connected; and a support arm section that is connected to the base section between the pair of vibrating arm sections and extends from the base section to the same side as the pair of vibrating arm sections, in which convex sections are formed continuous with side surfaces of roots of the vibrating arm sections and side surfaces of the base section.

Abstract: A piezoelectric vibrator is provided in which a piezoelectric vibrating piece is accommodated in a package, the piezoelectric vibrating piece including: a pair of vibrating arm sections; a base section to which each base end of the pair of vibrating arm sections is connected; and a support arm section that is connected to the base section between the pair of vibrating arm sections and extends from the base section to the same side as the vibrating arm sections, in which the piezoelectric vibrating piece is supported within the package in mount sections provided in the support arm section, and in which the mount sections are provided in a region which is defined between a position of which a distance from an end section of the base section opposite to the side where the support arm section is connected to the side of a leading end of the support arm section is 25% of a width dimension of the base section along the width direction and a position of which the distance is 65% of the width dimension.

Abstract: A piezoelectric vibration piece that can ensure good drive level characteristics and a piezoelectric vibrator, oscillator, electronic device and radio-controlled timepiece in which the piezoelectric vibration piece is used are provided. The width of the base-end side of the grooves 5 is narrower than that of the tip side of the grooves 5. The base 4 includes: a mount section 4a on the outer surface of which mount electrodes 12, 13 are formed to mount the piezoelectric vibration piece 1; and an intermediate section 4b that is connected to the mount section 4a and the pair of vibrating arms 3a, 3b so as to be positioned between the mount section 4a and the pair of vibrating arms 3a, 3b, on the outer surface of which leading electrodes 14a, 14b that connect the pair of excitation electrodes 10, 11 and the mount electrodes 12, 13 are formed. The width of the mount section 4a is wider than that of the intermediate section 4b.

Abstract: A piezoelectric vibrating piece includes a pair of vibrating arm portions, a base portion which is arranged between a pair of vibrating arm portions, and connecting portions which connect proximal end portions of a pair of vibrating arm portions and a proximal end portion of the base portion. Narrow width portions are provided at the base of the base portion.

Abstract: A piezoelectric vibrating piece includes a pair of vibrating arm portions which are arranged with a center axis interposed therebetween, a base portion which is arranged between a pair of vibrating arm portions and fixed to the outside, and a pair of connecting portions which connect proximal end portions of a pair of vibrating arm portions and a proximal end portion of the base portion. The distance between distal end portions of the vibrating arm portions and the center axis is smaller than the distance between the proximal end portions of the vibrating arm portions and the center axis.

Abstract: Provided are a vacuum package and a method for manufacturing the vacuum package having excellent airtightness and capable of improving mounting strength, and a piezoelectric vibrator, an oscillator, an electronic device, and a radio-controlled timepiece. The package includes a base substrate and a lid substrate bonded to each other, a cavity formed between the base substrate and the lid substrate and configured to be capable of sealing a piezoelectric vibrating reed, and penetration electrodes penetrating through the base substrate in the thickness direction so as to make the inner side of the cavity and the outer side conductive. Portions of the base substrate and the lid substrate in the vicinity of the cavity form bonding regions in which the two substrates are bonded. A notch portion through which the bonding surface of the lid substrate is exposed as seen from the thickness direction of the base substrate is formed on the corner portions of the base substrate.

Abstract: A piezoelectric vibrating strip includes a pair of vibrating arm portions in parallel with a central axis therebetween, and a base portion integrally cantilevering base end portions of the pair of vibrating arm portions in a length direction. Each of the pair of vibrating arm portions has a first groove portion and a second groove portion in a main face, the first groove portion being placed closer to a leading end portion in the length direction of the vibrating arm portions and having a groove width along a width direction orthogonal to the length direction and a thickness direction of the vibrating arm portion. The second groove portion is closer to the base end portion than the first groove portion and has a groove width along the width direction. The groove width ratio of the second groove portion to the first groove portion is between 0.4 and 1.0.

Abstract: A piezoelectric vibrating piece, a piezoelectric vibrator, an oscillator, an electronic apparatus and a radio timepiece capable of reducing the size while suppressing reduction of rigidity and having excellent vibration characteristics. The piezoelectric vibrating piece includes a pair of vibrating arm portions in parallel to each other, a base portion integrally fixing base end portions of the pair of vibrating arm portions in a length direction, groove portions on main surfaces of the pair of vibrating arm portions and extending along the length direction, where each of the groove portions includes a first groove portion near a tip portion end of the vibrating arm portions and a second groove portion near the base end portion side of the vibrating arm portions with respect to the first groove portion, and the second groove portion is offset in a ?X axis direction with respect to the first groove portion.

Abstract: A piezoelectric vibrator including a package having a base member, a lid member forming a cavity with respect to the base member, and a piezoelectric vibrating piece mounted on a mount surface and housed inside the cavity, in which the piezoelectric vibrating piece has a pair of vibrating arm portions and a base portion cantilever-supporting base end portions of the pair of vibrating arm portions and being mounted on the mount surface, a concave portion for avoiding contact with respect to tip portions when the vibrating arm portions are displaced in a thickness direction is formed on the mount surface, contact portions contacted by main surfaces of the vibrating arm portions facing the mount surface, and clearance portions for avoiding contact with at least one edge-line portion of two edge-line portions where the main surface intersects with two side surfaces.