Abstract: The present invention provides a tuning fork crystal oscillator plate and a manufacturing method therefor, and a piezoelectric device. The tuning fork crystal oscillator plate has a base and a pair of vibrating arms extending out of the base, wherein a front surface and a back surface of each vibrating arm are separately provided with step-shaped sinking grooves formed by photolithography and corrosion along a thickness direction, and the photolithography and corrosion are performed on the step-shaped sinking grooves along a length direction of the vibrating arms; the step-shaped sinking groove is provided with n steps; and outer surfaces of the step-shaped sinking groove are all plated with electrodes. The piezoelectric oscillator plate manufactured by the present invention has the advantages of low impedance, high frequency precision and low energy consumption.

Abstract: For a piezoelectric device, an optical characteristic and/or a piezoelectric characteristic is improved. A piezoelectric device has a first electrode layer, a second electrode layer, and a piezoelectric layer provided between the first electrode layer and the second electrode layer, wherein the piezoelectric layer is formed of a wurtzite crystal material as a main component, to which one or more elements is/are added, said one or more elements being transparent when turned into an oxide, and wherein a haze value is 3% or less, and transmittance with respect to light having a wavelength of 380 nm is 50% or more.

Abstract: An ultrasound transducer, wherein the ultrasound transducer includes a membrane including a top portion and a bottom portion, wherein the membrane is configured to vibrate and generate an ultrasound in response to voltage applied the transducer, wherein the membrane includes a perimeter including a plurality of sides and a top surface and a bottom surface with one or more feet extending away from the bottom surface; and a support member that attaches to and connects to the membrane and supports the membrane, wherein the support member includes one or more platforms extending to and attaching to the membrane and a substrate, wherein a first end of the platform connects to the membrane and includes a support portion, wherein the support portion away from the platform, wherein the platform includes the one or more piezoelectric layers, wherein the one or more platforms support and surround the membrane.

Abstract: Among a plurality of electrodes for mounting purpose, all of the electrodes for mounting purpose but two paired ones of the electrodes for mounting purpose that are connected to driving electrodes each have a wiring pattern for use in electrical connection between terminals for external connection and mounting terminals of IC. These wiring patterns each have a constricted portion smaller in width than the other portions that prevents the conduction of heat.

Abstract: A piezoelectric (PZT) actuator assembly having a fixed-end and a hinged-end is provided. The assembly includes a first side electrode at the hinge-end, and a second side electrode at the fixed-end. The assembly includes a third piezoelectric layer including a top surface and a bottom surface disposed over the top surface of the second PZT layer. A fourth electrode is at least partially disposed on the top surface of the third PZT layer. The fourth electrode is connected to the second side electrode at the fixed-end.

Abstract: A signal generator has a generator output. The signal generator is configured to generate first and second signals at the generator output. The first signal has a first frequency, and the second signal has a second frequency. Switching circuitry has a circuitry input and a circuitry output. The circuitry input is coupled to the generator output. The circuitry output is adapted to be coupled to an ultrasonic transducer mechanically coupled with a surface. The switching circuitry is configured to: provide the first signal to the ultrasonic transducer at the first frequency to reduce a fluid droplet on the surface from a first size to a second size; and provide the second signal to the ultrasonic transducer at the second frequency to reduce the fluid droplet from the second size to a third size.

Abstract: An audio device includes a vibration member, and a first piezoelectric vibrator and a second piezoelectric vibrator that are provided on the vibration member. A natural frequency of the first piezoelectric vibrator is larger than a natural frequency of the second piezoelectric vibrator.

Abstract: The present invention relates to a sensor, comprising a sensor element and an interconnect. The interconnect is configured to be arranged at the sensor element. The interconnect comprises at least a carrier film provided with metallic layer. The interconnect is configured to provide an electrical connection for the sensor element. Furthermore a device comprising the sensor and a method of manufacturing the sensor is provided.

Abstract: An ultrasonic device includes a case, a piezoelectric element, a sound absorbing material, and a vibration-proof material. The case defines a housing space. The piezoelectric element is disposed in the housing space. The sound absorbing material is disposed on the piezoelectric element and is made of a foaming material. The vibration-proof material is disposed around the sound absorbing material and is in contact with an inner face of the case. Between the piezoelectric element and the sound absorbing material, a first space is formed.

Abstract: A sensor electric wire that is not readily affected by external noise, and a sensor circuit that uses the same, including a first internal conductor covered by a piezoelectric material, a second internal conductor provided on the outside of the piezoelectric material, and an external shield conductor surrounding the first internal conductor and the second internal conductor, an insulating body being disposed between the first internal conductor and second internal conductor, and the external shield conductor.

Abstract: A method for manufacturing a vibrator that includes forming excitation electrodes, lead-out electrodes, and first sealing frames on the main surfaces of a crystal piece; forming second sealing frames on the main surfaces of a base part and a lid part; and sealing a crystal vibration element by bonding the first sealing frames to the second sealing frames. The first sealing frames each include a first Ti or Cr base layer 110, and a first Au surface layer. The first Ti or Cr base layers are thinner than the first Au surface layers. The second sealing frames each include a second Ni base layer, and a second AuSn surface layer. The second Ni base layers are thicker than the second AuSn surface layers. The sealing is carried out by alloying the first Au surface layers and the second AuSn surface layers to each other.

Abstract: The disclosure relates to a hybrid structure for a surface-acoustic-wave device comprising a useful layer of piezoelectric material joined to a carrier substrate having a thermal expansion coefficient lower than that of the useful layer; the hybrid structure comprising an intermediate layer located between the useful layer and the carrier substrate, the intermediate layer being a structured layer formed from at least two different materials comprising a plurality of periodic motifs in the plane of the intermediate layer.

Abstract: A vibrating device includes a diaphragm that includes first and second vibrating portions and a fixation portion, first and second piezoelectric vibrators that are provided at the first and second vibrating portions, respectively, and fixation electrodes. The fixation portion includes a first side portion and a second side portion that extend in different directions. The diaphragm and the fixation electrodes are provided integrally as a single monolithic member. The first vibrating portion extends from the first side portion and the fixation electrodes extend from the second side portion.

Abstract: A transmission circuit according to an embodiment includes: a plurality of constant current circuits, a plurality of switching elements, and controlling circuitry. The plurality of constant current circuits are connected in parallel to a power source line connected to a single power source and a transducer element. Each of the plurality of switching elements is connected to a different one of the plurality of constant current circuits and to the transducer element. The controlling circuitry is configured to control the plurality of switching elements on the basis of a waveform signal indicating a waveform of an ultrasound wave output from the transducer element.

Abstract: A vibrator includes: a base portion; a vibrating arm including an arm portion which extends from the base portion, and a weight portion which is located on a tip end side of the arm portion and which has a first main surface and a second main surface that are in a front-back relationship; and a weight film disposed at the first main surface of the weight portion. The first main surface includes a first planar surface, a second planar surface which is located closer to the second main surface than is the first planar surface and which is parallel to the first planar surface, and an inclined surface which couples the first planar surface and the second planar surface and which forms an angle of 100° or less with the first planar surface. A method for manufacturing a vibrator includes: a preparation step of preparing the above-described vibrator; and a removing step of removing a part of the weight film by emitting an energy ray to the weight film from a normal direction of the first planar surface.

Abstract: The module comprises, in an envelope tube, a pendular unit comprising a piezoelectric transducer, PZT, beam, an inertial mass coupled to the free end of the beam, and a beam mount secured to the tube and fastened to a clamping part of the beam. The module further includes a symmetrization insert for calibrating and symmetrizing the pendular unit oscillations in transverse and lateral directions. The symmetrization insert is distinct from the beam mount and comprises a peripheral portion secured to the tube independently of the beam mount, and a central portion with an axial through-cavity inside which the beam extends in said region of free travel. The axial cavity extends between opposite travel limitation surfaces, which are symmetrical and capable of coming into contact with the beam in a bending configuration of the beam.

Abstract: Provided is a joined body including a piezoelectric substrate and a polycrystalline spinel substrate provided on one main surface of the piezoelectric substrate, wherein the polycrystalline spinel substrate has a porosity of 0.005% or more and 0.6% or less.

Abstract: Frequency bandwidth of a cantilever beam system can be enhanced using a movable mass having motion in a cavity of a mass attached to cantilever beam, where the motion is transverse to the cantilever beam. In various embodiments, a cantilever beam apparatus includes a cantilever beam, a first mass, and a second mass. The first mass can be attached to the cantilever beam, with the first mass having a cavity arranged transverse to the cantilever beam. The second mass can be disposed in the cavity such that the second mass is movable in the cavity in a direction transverse to the cantilever beam. Apparatus, systems, and methods associated with enhanced frequency bandwidth of cantilever beam using transverse movable mass are applicable in a variety of applications.

Abstract: Disclosed in an ultrasonic probe for obtaining an ultrasonic image.

Abstract: A bulk acoustic resonator includes a first electrode disposed on an upper side of a substrate, a piezoelectric layer disposed on an upper surface of the first electrode, and a second electrode disposed on an upper surface of the piezoelectric layer, wherein an upper surface of at least one of the first electrode and the second electrode has a recess region, wherein a depth of the recess region is D, a width of the recess region is W, and a resonance frequency is F, and ln is a natural logarithm, and wherein [{ln(D*W)}/(?0.59*F)] is [[ln{0.008 (?m)2}]/{?0.59*(3.5 GHz)}] or more and [[ln{0.022 (?m)2}]/{?0.59*(3.5 GHz)}] or less.