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 metal film.
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:
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 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.
Abstract:
A piezoelectric vibrator, an oscillator, an electronic device and a ratio timepiece are provided which are capable of increasing a capacitance C0 while achieving miniaturization and cost reduction. The piezoelectric vibrator includes a base substrate, a lid substrate, a piezoelectric vibrating reed on which an excitation electrode is formed, and external electrodes. An electrode pattern for capacitance adjustment, which extends along a routing electrode, is provided extending from a routing electrode.
Abstract:
Provided is a method of manufacturing a piezoelectric vibrator of the invention, the piezoelectric vibrator including a tuning fork type piezoelectric vibrating reed including a pair of vibration arm portions, a package that accommodates the piezoelectric vibrating reed, and a pair of regulation films that is formed along a longitudinal direction of the vibration arm portions corresponding to each of the pair of vibration arm portions, the piezoelectric vibrator being capable of regulating a degree of vacuum in the package more than a certain level by irradiating the regulation films with a laser to evaporate a part of the regulation films. The method includes a gettering process of irradiating a laser in symmetrical positions via a center axis of the pair of vibration arm portions in the pair of regulation films.
Abstract:
There is provided a wafer making it possible to stably break off the piezoelectric vibrator element. The wafer includes a piezoelectric vibrator element, a frame part, and a connection part adapted to connect the piezoelectric vibrator element and the frame part to each other, and the connection part is provided with a guide part adapted to guide force, which is applied to the connection part from one surface side in the thickness direction of the connection part when breaking off the piezoelectric vibrator element from the frame part at the connection part, to at least one side in the width direction of the connection part.
Abstract:
A method of manufacturing a piezoelectric vibrator element, a piezoelectric vibrator element, and a piezoelectric vibrator, superior in vibration characteristics, high in quality, and capable of suppressing a variation in frequency after a frequency adjustment, are provided. The method includes a first frequency adjustment step of performing ion milling on a weight metal film for a frequency adjustment formed on a surface of a tip part in each of a pair of vibrating arm parts, and a second frequency adjustment step of performing ion milling on the weight metal film at a lower etch rate than in the first frequency adjustment step after the first frequency adjustment step.
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.