Abstract: An electroacoustic component that includes a substrate made of monocrystalline LiNbO3 is disclosed. In the component, a first Euler angle ? of the monocrystalline LiNbO3 is: ??0°, a second Euler angle ? of the monocrystalline LiNbO3 is: ?74°????52° or 23°???36°, and a third Euler angle ? of the monocrystalline LiNbO3 is: ??0°.

Abstract: A receiving sleeve (1) for an actuator body, in particular for holding a piezoelectric stack of a piezoelectric actuator, is used to drive an injector of an injection system for an internal combustion engine. The sleeve is equipped with at least one spring element (10, 11) for centering the actuator body in the receiving sleeve (1) and/or for compensating component tolerances of the actuator body.

Abstract: An electrical generator includes a fluid-flow driven impeller including at least one impact arm; and at least one cantilevered beam disposed such that the impact arm strikes the cantilevered beam as the impeller rotates. The cantilevered beam at least partially includes a piezoelectric film.

Abstract: In a nondestructive testing system, a preamplifier is connected to a piezoelectric element and is tuned to optimize the amplitude of a signal input to the piezoelectric element and the shape of a response signal. A receiver amplifier couples the signal received from the piezoelectric element to an ultrasound system.

Abstract: A capacitive micromachined ultrasonic transducer (cMUT) is constituted by a plurality of transducer elements comprising plural transducer cells that are mutually connected in parallel and comprises: a silicon substrate; a bottom electrode placed on the top surface of the silicon substrate; an upper electrode placed opposite to the bottom electrode and apart therefrom by a prescribed air or vacuum; a membrane for supporting the bottom electrode; and a membrane supporting part for supporting the membrane, wherein the cMUT comprises a third electrode which has an electrical continuity to the bottom electrode and which corresponds to either one of the transducer cells of a prescribed number of the transducer subelement or of the transducer elements, and a fourth electrode which is a ground electrode electrically connected to the bottom electrode.

Abstract: A unidirectional transducer for a surface acoustic wave (SAW) device. In one embodiment the device includes (1) a defined area on a piezoelectric substrate within which is located an open circuit reflector perpendicular to the SAW direction of propagation; and a pair of low reflectivity transducer electrodes located within the defined area and connected to opposing bus bars, the electrodes perpendicular to the direction of the SAW propagation and positioned with the excitation center of the pair of electrodes located about seven-eighths of a Rayleigh wavelength at a center frequency of the SAW from the reflector.

Abstract: Provided is an electronic component capable of securely soldering an external terminal such as a lead wire to each terminal electrode, while preventing overflow of solder from the area on the terminal electrode. In the electronic component as a multilayer piezoelectric device, on the occasion of soldering a lead wire 24 to a terminal electrode 17, the lead wire 24 can be placed on a second region R2 higher in height than a first region R1 from a surface 7a of a piezoelectric layer 7. This makes a molten solder 25 more likely to flow from the second region R2 to the first region R1 during the soldering. For this reason, the solder 25 is prevented from overflowing from the area on the terminal electrode 17 even if the amount of the solder for soldering the lead wire 24 to the terminal electrode 17 is increased in order to improve certainty of connection between terminal electrode 17 and lead wire 24.

Abstract: A piezoelectric element unit includes a piezoelectric element group, a fixing plate, and a wiring member. The piezoelectric element group includes an array of piezoelectric elements, each piezoelectric element having an external electrode. A rear portion of the piezoelectric element group is fixed to the fixing plate by polymerization such that a tip end portion of the piezoelectric element group protrudes from a tip end surface of the fixing plate. The wiring member has a wiring terminal that is bonded to the external electrode of each of the piezoelectric elements. In this unit, the piezoelectric element group has a wiring connection surface located opposite to a surface thereof fixed to the fixing plate, the wiring connection surface having a solder-bonding region and a resist application region, the resist application region being located at a rear end side of the solder-bonding region.

Abstract: It is an object to provide an ultrasonic motor that can stably and finely (that is, minutely) move a driven body. The invention provides an ultrasonic motor comprising an ultrasonic vibrator which includes an electromechanical transducer and which is configured to simultaneously generate two different vibration modes to produce substantially elliptical vibrations at output terminals by supplying two sets of alternating-current voltages with a predetermined phase difference and a predetermined driving frequency to the electromechanical transducer; and a pressing unit for pressing the output terminals of the ultrasonic vibrator against a driven body. The output terminals include first friction-contact members disposed at positions substantially corresponding to antinodes of a flexural vibration and a second friction-contact member disposed substantially at the center in the longitudinal direction of the ultrasonic vibrator.

Abstract: A piezoelectric actuator includes individual inner-electrodes arranged between stacked ceramic sheets, individual surface-electrodes arranged in a row in a row-direction on a top surface of the stacked ceramic sheets, and connection electrodes connecting the individual inner-electrodes and the individual surface-electrodes respectively. The connection electrodes each have a size enough to cover one of the individual surface-electrodes respectively. The individual surface-electrodes and the connection electrodes are connected to each other via inner conduction electrodes filled through holes which are located at mutually different positions in a direction orthogonal to the row-direction of the individual surface-electrodes. With this, it is possible to make the contour of the piezoelectric actuator to be small, and to suppress the arching deformation or warpage of the piezoelectric actuator.

Abstract: An actuator device includes a plurality of piezoelectric elements formed on a surface of a substrate. Each piezoelectric element is configured of a piezoelectric layer, an upper electrode, and a lower electrode that is formed across the plurality of piezoelectric elements. The actuator device also includes a thin film portion provided to a region in the lower electrode between each adjacent two of the piezoelectric elements. The thin film portion has a thickness smaller than that of a region in the lower electrode provided to each piezoelectric element. The actuator device also includes a concave portion provided to the boundary portion between each thin film portion and the piezoelectric element adjacent thereto. In the actuator device, the inner surface and an edge of the opening, which is opposite to the adjacent piezoelectric element, of the concave portion are formed into curved surfaces.

Abstract: A shock resistant and mode mixing resistant assembly for oscillating a device such as a MEMS mirror around a pivot axis by means of two pairs of piezoelectric elements or towers is provided. The resistance to mechanical shock and mode mixing is accomplished by mounting the broad faces or width of each piezoelectric element in a chevron shape so that the broad faces or width dimensions are not in parallel or aligned with each other. Mounting the piezoelectric elements so that the broad faces or width dimensions are at a 15 degree angle with respect to a line perpendicular to the pivot axis has been found to be especially effective.

Abstract: The integrated unmanned, affordable, microsystem in accordance with the present invention is used to deploy physical or chemical sensors for continuous monitoring of sea space over large time periods. The microsystem is capable of measuring ocean physical parameters over large time spans weeks, with higher accuracies and resolution and at significantly lower costs that the other sensors currently known in the art.

Abstract: An electromechanical transducer which provides orthogonal translated motion to a piston through an attached lever arm connected to and driven by at least two electromechanical cantilever members, mounted on a separate inertial tail mass, and which under full array loading conditions provide a reduced resonance frequency that yields velocity control in the vicinity of that resonance.

Abstract: There is provided with a piezoelectric transformer which does not require a marking operation, is easy to manufacture, and is capable of reducing costs. After the piezoelectric transformer is manufactured, a shape of secondary side electrodes on the outer end is made so that a polarization direction can be recognized at the time of printing the secondary side electrodes without marking by a separate step to recognize the polarity on the primary side.

Abstract: An electroacoustic transducer includes a first electrode having first fingers connected to a first bus bar, and a second electrode having second fingers connected to a second bus bar. The first and second fingers interdigitate and terminate at ends. The ends of the first and second fingers abut gaps between the first and second electrodes. An acoustic wave of wavelength ? is excitable at a resonant frequency. The acoustic wave has a longitudinal and a transverse excitation profile and a longitudinal and a transverse energy density profile, where the longitudinal excitation profile is approximately constant and different from the longitudinal energy density profile, and the transverse excitation profile substantially corresponds to the transverse energy density profile. Transverse positions of the gaps relative to the first and second bus bars vary to substantially correspond to the transverse excitation profile across the gaps.

Abstract: An upper electrode (50) includes a first electrode section (51) formed in a circular shape and a second electrode section (52) and a third electrode section (53) formed in a fan-shaped manner outside of the first electrode section (51). The first, second, and third electrode sections (51 to 53) are electrically separated from one another via an insulating region. A lower electrode (30) includes a fourth electrode section (31) formed in a circular shape and a fifth electrode section (32) and a sixth electrode section (33) formed in a fan-shaped manner outside of the fourth electrode section (31). Similarly, the fourth, fifth, and sixth electrode sections (31 to 33) are electrically separated from one another via an insulating region.

Abstract: A means for being electrically connected to an electrode of a piezo-electric plate is adapted for connecting the piezo-electric plate to a circuit board disposed under the piezo-electric plate. The piezo-electric plate and the circuit board are respectively provided with a first electrode and a second electrode corresponding to the first electrode. The means includes a conductive element and an elastic element. The conductive element includes at least two connecting surfaces electrically connected to each other and respectively electrically connected to the first electrode and the second electrode. The elastic element is joined with the conductive element and located between the piezo-electric plate and the circuit board.

Abstract: A package structure realizing a size and/or thickness reduction and suitable for packaging a surface acoustic wave element is provided. The package structure for solving the above challenge includes a base having a thick floor 16b on which to place a surface acoustic wave element 12 and a thin floor 16a on which to place an electronic component 14, the surface acoustic wave element and the electronic component being mounted close to each other on the plane coordinate system. In addition, in the package structure described above, the difference in height between the thin floor 16a and the thick floor 16b is the same as, or larger than, the thickness of the electronic component mounted on the thin floor 16a.

Abstract: Provided is a vibration wave motor including a pressurizing mechanism and a guide mechanism which are used for a moving member and can be thinned. The influence of a restoring force can be eliminated. The vibration wave motor includes an elastic vibration member which is composed of a permanent magnet and a piezoelectric element which are fixed to each other, a plurality of motion extraction portions provided on the permanent magnet, and a moving member which is pressurized to be in contact with the plurality of motion extraction portions. A closed magnetic circuit of a magnetic flux is formed to connect between the elastic vibration member and the moving member through the plurality of motion extraction portions. A flow direction of the magnetic flux passing through the moving member is aligned with a moving direction of the moving member.