Abstract: A piezoelectric ceramic electronic component that includes a piezoelectric ceramic body including at least one piezoelectric ceramic layer; and a plurality of electrodes on a surface or inside of the piezoelectric ceramic body and arranged so that the at least one piezoelectric ceramic layer is sandwiched between adjacent electrodes of the plurality of electrodes. The at least one piezoelectric ceramic layer is a ceramic sintered body containing a potassium sodium niobate-based compound and Mn. When the at least one piezoelectric ceramic layer sandwiched between the adjacent electrodes is divided into three equal parts in a thickness direction to sequentially define a first region, a second region, and a third region between the adjacent electrodes, a second Mn concentration in the second region is higher than a first Mn concentration in the first region and a third Mn concentration in the third region.

Abstract: A vibration device includes a vibration plate, a piezoelectric element, and a wiring member. The vibration plate has conductivity. The piezoelectric element is disposed on the vibration plate. The wiring member is disposed to oppose the vibration plate via the piezoelectric element. The piezoelectric element includes a piezoelectric element body, a first external electrode, and a second external electrode. The piezoelectric element body has a first main surface and a second main surface facing away from each other in an opposing direction of the vibration plate and the wiring member. The first external electrode is disposed on the first main surface and electrically connected to the vibration plate. The second external electrode is disposed on the second main surface and electrically connected to the wiring member. The vibration plate includes a first projection projecting toward the wiring member and electrically connected to the wiring member.

Abstract: An artificial cilium device includes a substrate and a voltage-actuated cilia-shaped structure attached at a proximal end to the substrate. The voltage-actuated cilia-shaped structure has a first layer of a first material and a second layer of a second material. The second layer of the second material includes an exposed surface that causes the cilia-shaped structure to, in a working medium, (a) change shape from a first shape to a second shape responsive to application of a first voltage and (b) change shape from the second shape to the first shape responsive to application of a second voltage different than the first voltage.

Abstract: A surface acoustic wave resonator device and method for manufacturing the same, and filter, the surface acoustic wave resonator device includes an interdigital electrode body region, and including: a piezoelectric substrate; a first interdigital electrode, a first interdigital electrode connection part and a first interdigital electrode lead-out part electrically connected to each other; a second interdigital electrode, a second interdigital electrode connection part and a second interdigital electrode lead-out part electrically connected to each other; and a spanning structure; wherein the first and second interdigital electrode connection parts are respectively located on opposite sides of the interdigital electrode body region; the first interdigital electrode connection part contacts the first interdigital electrode and is electrically isolated from the second interdigital electrode through the spanning structure; the second interdigital electrode connection part contacts the second interdigital electrode

Abstract: Acoustic resonator devices and filters are disclosed. An acoustic resonator includes a substrate having a surface and a single-crystal lithium niobate (LN) plate having front and back surfaces, the back surface attached to the surface of the substrate except for a portion of the LN plate forming a diaphragm that spans a cavity in the substrate. An interdigital transducer (IDT) is formed on the front surface of the LN plate such that interleaved fingers of the IDT are disposed on the diaphragm. A half-lambda dielectric layer is formed on one of the front surface and back surface of the diaphragm. Euler angles of the LN plate are [0°, ?, 0°], where 20°???25°.

Abstract: A surface acoustic wave resonator device and method for manufacturing the same and filter, the surface acoustic wave resonator device includes: a piezoelectric substrate; an interdigital transducer, disposed on the piezoelectric substrate and comprising a first interdigital electrode structure and a second interdigital electrode structure, wherein each interdigital electrode structure comprises an interdigital electrode and an interdigital electrode lead-out part connected with each other; and a first temperature compensation layer, disposed on the piezoelectric substrate and comprising a body part and a protruding part, wherein the body part covers the interdigital transducer, the protruding part is protruded from the body part towards the piezoelectric substrate in a third direction perpendicular to a main surface of the piezoelectric substrate, and is surrounded by the piezoelectric substrate in a direction parallel to the main surface of the piezoelectric substrate.

Abstract: A composite piezoelectric element includes a first electrode layer, a piezoelectric substance layer disposed on the first electrode layer, and a second electrode layer disposed on the piezoelectric substance layer, and, in plan view, a measuring unit including the first electrode layer, the piezoelectric substance layer, and the second electrode layer and a buffer portion in which the piezoelectric substance layer is not provided.

Abstract: A bulk acoustic wave (BAW) resonator includes a bottom substrate, a piezoelectric layer disposed above the bottom substrate, a cap wafer disposed above the piezoelectric layer, a top electrode disposed on the piezoelectric layer, a bottom electrode disposed below the piezoelectric layer, a first pad metal layer disposed on and electrically connected to the top electrode. a second pad metal layer disposed on and electrically connected to the bottom electrode, a top bonding layer disposed below the cap wafer, for bonding the cap wafer with the piezoelectric layer; and a bond contacting layer disposed between the top bonding layer and each one of the first pad metal layer and the second pad metal layer.

Abstract: The present disclosure provides an ultrasonic sensor, a method for driving the same, and a method for manufacturing the same. The ultrasonic sensor includes a back plate, a sounding structure on the back plate and a backing layer on a side of the sounding structure distal to the back plate; the sounding structure includes a plurality of emitting electrodes, an opposite electrode, a piezoelectric layer and a plurality of signal leads, and the plurality of emitting electrodes and the opposite electrode are respectively arranged on two sides of the piezoelectric layer; and the plurality of emitting electrodes are arranged in an array, and each of the emitting electrodes is individually coupled to one of the signal leads. The ultrasonic sensor may achieve an independent control for each patterned electrode such that the ultrasonic sensor may be used as a point sound source.

Abstract: An article comprising a ferroelectric material in its ferroelectric phase, wherein the article is configured to enable low-loss propagation of signals with ultra-low dielectric loss at one or more select frequencies.

Abstract: A bulk acoustic wave resonator and method for manufacturing the same, the bulk acoustic wave resonator includes: a piezoelectric layer; a first electrode layer, a carrier structure, and first and second conductive connectors disposed on a first side of the piezoelectric layer, and a second electrode layer, an interconnection pad and a cover structure disposed on a second side of the piezoelectric layer, wherein the first electrode layer includes a first electrode and an additional electrode electrically isolated from each other; the second electrode layer includes a second electrode; the interconnection pad is electrically connected to the second electrode and the additional electrode; a first cavity is disposed between the carrier structure and the piezoelectric layer; the first conductive connector is electrically connected to the first electrode, the second conductive connector is electrically connected to the second electrode through the additional electrode and the interconnection pad.

Abstract: An energy harvesting roadway that includes a plurality of road segments and a power storage device electrically coupled to the plurality of road segments. Each of the plurality of road segments can include a surface asphalt layer, a first conductive asphalt layer located under the surface asphalt layer, a piezoelectric-based asphalt layer located between the first conductive layer and a second conductive layer located above a base asphalt layer. The piezoelectric-based asphalt layer can include a plurality of rigid piezoelectric elements and an insulating filler.

Abstract: A control system for an ultrasonic surgical device has a console operatively connected to a power source and configured for detachable connection to the ultrasonic surgical device. A control circuit of the console is configured to regulate an operating signal to correspond to the operating characteristics of the ultrasonic surgical handpiece in response to a loading signal. An operator input of the console operatively connects to the control circuit to provide a control signal.

Abstract: A transducer array for ultrasound applications includes a plurality of transducer elements that are provided with self-aligned connections to a flexible cable. The array is easy to manufacture and suited for wearable, wireless, and other small ultrasound devices. A simple and efficient method of producing a robust transducer array involves at least partially separating the transducer elements after their connection to their respective conductors.

Abstract: A method of manufacturing a piezoelectric resonator unit that includes mounting a piezoelectric resonator on a base member, the piezoelectric resonator including a piezoelectric element and a pair of excitation electrodes facing each other with the piezoelectric element interposed therebetween, each of the pair of excitation electrodes including an underlying layer containing chromium and a surface layer on the underlying layer; forming chromium oxide on the surface layer of each of the pair of excitation electrodes by oxidizing chromium diffused from the underlying layer such that an amount of the chromium oxide is larger on the surface layer of the excitation electrode on a base member side than on the surface layer of the excitation electrode on a lid member side among the pair of excitation electrodes; and joining a lid member to the base member such that the piezoelectric resonator is between the base member and the lid member.

Abstract: A human body detection device including line-shaped piezoelectric substrates respectively provided in each of a plurality of regions in a plate material intersecting a direction of pressure received from a human body, and provided such that an axial direction of each of the piezoelectric substrates runs along the plate material so as to detect pressure applied in a radial direction of the piezoelectric substrate, memory, and a processor coupled to the memory. The processor is configured to be capable of detecting an output signal from each of the piezoelectric substrates.

Abstract: Disclosed is a piezoelectric transducer which is mounted to a target in use, comprising: a piezoelectric element having a front face which faces the target, and an opposing rear face which faces away from the target, wherein the piezoelectric element has a first acoustic impedance; an compression element located on the rear surface side of the piezoelectric element, the compression element having a second acoustic impedance which is less than the first acoustic impedance; and, a compression mechanism which urges the compression element towards the piezoelectric element such that the compression element is compressed between the compression mechanism and piezoelectric element.

Abstract: A structure for packaging a crystal oscillator includes a package base, at least one glue, a resonant crystal blank, and a top cover. The top of the package base has a recess. The glue is formed in the recess. The resonant crystal blank has at least one opening, at least one border area, at least one connection area, and a resonant area. The opening is arranged between the border area and the resonant area. The border area is connected to the resonant area through the connection area. The border area is formed in the recess through the glue. The top cover is formed on the top of the package base. The top cover closes the recess, the at least one glue, and the resonant crystal blank.

Abstract: A piezoelectric element device includes: a substrate including a plurality of vibrating portions having a first vibrating portion and a second vibrating portion; a piezoelectric element group in which a plurality of piezoelectric elements having a first piezoelectric element and a second piezoelectric element provided in the plurality of vibrating portions are coupled in parallel to each other; a plurality of load detectors having a first load detector including the first vibrating portion and the first piezoelectric element provided in the first vibrating portion and a second load detector including the second vibrating portion and the second piezoelectric element provided in the second vibrating portion; and a resin layer covering the piezoelectric element group.

Abstract: Electromechanical transducer (1, 21, 28) having a layer structure comprising, in this order: a first layer (2) which has, in at least one plane, at least one outwardly insulated, structured, electrically conductive region (3) acting as an electrical shield, a second layer (6) serving as an adhesive layer, which is electrically conductive at least at certain points, a third layer (13, 22) comprising an electromechanical functional element, a fourth layer (15, 23) serving as an adhesive layer, which is electrically conductive at least at certain points, a fifth layer (17, 24), which has, in at least one plane, at least one outwardly insulated structured electrically conductive region (18) acting as an electrical shield. In addition, a method for manufacturing such an electromechanical transducer (1, 21, 28) is described.