|| List of recent Piezoelectric-related patents
|Method and system for liquid fuel desulphurization for fuel cell application|
A method for desulphurization of a liquid fossil fuel to be used in connection with a fuel cell is performed in a system comprising an evaporator unit (1), wherein the liquid fuel is first evaporated, a fixed bed reactor (2) in the form of a gas-phase hydro-desulphurizer, where the fuel is treated with hydrogen at atmospheric pressure over a highly active hydro-cracking (haht) catalyst, whereby sulphur species are converted to h2s, an adsorber (3), where the produced hydrogen sulphide can be adsorbed on a catalytic bed, and a fuel reformer (4), in which the fuel product is converted to syngas to be fed to an sofc system (6). The evaporator unit (1) comprises a liquid spraying device, preferably in the form of a piezoelectric spray nozzle..
|Head suspension assembly and disk device with the assembly|
According to one embodiment, a head suspension assembly includes a base plate, a load beam including a proximal end secured onto the base plate, a head supported on the load beam via a gimbal, a flexure attached on the load beam and the base plate, and first and second piezoelectric elements in first and second openings of the base plate. The proximal end of the load beam includes first and second extended connections bifurcated from the proximal end and connected to the base plate, first and second island connections, and an opening region exposing the base plate.
|Flow path unit and liquid ejecting apparatus equipped with flow path unit|
A flow path unit includes a pressure chamber substrate in which a plurality of pressure chambers are arranged in a first direction; and a piezoelectric element that changes a volume of the pressure chamber, in which a plane shape of an active section of the piezoelectric element is contained such that a width on one side thereof in a second direction crossing the first direction is wider than that on the other side in the second direction. The side on which the width of the active section of the piezoelectric element is great and the side on which the width thereof is smaller in the second direction be alternately disposed each other so that the active sections adjacent to each other are arranged differently from each other in the first direction..
|Display device including touch sensor and manufacturing method thereof|
The present disclosure relates to a display device including a touch sensor and a manufacturing method thereof, and more particularly, to a display device including a touch sensor using a piezoelectric material and a manufacturing method thereof. The display device includes a first substrate, wherein a plurality of thin film transistors are disposed on the first substrate; a second substrate disposed facing the first substrate; a plurality of piezoelectric elements disposed on the second substrate; and a first sensing electrode overlapping the piezoelectric elements, the first sensing electrode being configured to transfer a sensing voltage generated as a result of pressure applied to the piezoelectric elements..
|Acoustic wave device|
An acoustic wave device includes: a piezoelectric film located on a substrate; a lower electrode and an upper electrode facing each other across the piezoelectric film; a temperature compensation film located on a surface, which is opposite to the piezoelectric film, of at least one of the lower electrode and the upper electrode and having a temperature coefficient of elastic constant opposite in sign to a temperature coefficient of elastic constant of the piezoelectric film; and an additional film located on a surface of the temperature compensation film opposite to the piezoelectric film and having an acoustic impedance greater than an acoustic impedance of the temperature compensation film.. .
An electronic component has a support member, an saw element which is mounted on the support member with a space s therebetween and which has a facing surface which faces the support member, and a resin portion which covers the saw element and which is provided so as to seal the space s. The saw element has a piezoelectric substrate, an idt provided on the facing surface of the piezoelectric board, an wiring (an outer wiring) which is provided on the facing surface of the piezoelectric board and extends from the idt toward the periphery side of the piezoelectric board, and a dam member which is adjacent to a lateral edge portion of the wiring and which is provided locally relative to the circumferential direction which surrounds the idt..
|Apparatus and method for energy harvesting|
An apparatus for energy conversion, comprising a piezoelectric component comprising a first part configured to convert vibrational energy into electrical energy; and an output for sending a first portion of the generated electrical energy to an electronic device, and a feedback loop for feeding a second portion of the generated electrical energy to a second part of the piezoelectric component, wherein the second part of the piezoelectric component is coupled to the first part of the piezoelectric component and is configured to convert electrical energy into vibrational energy thereby causing the first part of the piezoelectric component to vibrate.. .
Cantilever sensors made of piezoelectric material may be structured with various configurations of asymmetric anchors as well as asymmetric electrodes. Such asymmetry enables measurement of resonant properties of the cantilever that are otherwise unmeasurable electrically, resulting in significant advantages for ease of measurement.
|Accumulation conveyor with piezoelectric activation|
An accumulation conveyor for transporting articles includes a plurality of rollers defining a conveying surface, a frame supporting the plurality of rollers, a drive belt selectively couplable with the plurality of rollers to drive the plurality of rollers, and an actuator assembly having at least one piezoelectric actuator assembly configured to selectively urge the drive belt into driving engagement with the plurality of rollers.. .
|Sortation conveyor with piezoelectric actuation|
A sortation conveyor for transporting and diverting a plurality of articles includes a first conveying path and a second conveying path angularly positioned relative to the first conveying path. A plurality of pusher elements may be selectively diverted laterally across the first conveying path to divert articles to the second conveying path.
|Ink-jet print head, ink-jet printer using the same and method for manufacturing ink-jet print head|
According to one embodiment, an ink-jet print head comprises a support member including a flat portion with an ink supply aperture and an ink discharge aperture formed therein so as to circulate and supply ink, the flat portion including a recess, a base plate fitted in the recess of the support member, a nozzle plate laid over the base plate at a predetermined distance from the base plate and including a plurality of nozzles formed therein in a fixed direction, and an actuator disposed between the base plate and the nozzle plate and including a pressure chamber and a piezoelectric member, the pressure chamber being provided for each corresponding nozzle, and the piezoelectric member being provided to form a wall for the pressure chamber and configured to change capacity of the pressure chamber.. .
|Method of manufacturing liquid ejecting device|
A liquid ejecting device is manufactured by bonding a wiring substrate to a liquid ejection head by means of an adhesive film. The liquid ejection head has a pressure chamber for ejecting liquid and an air chamber disposed adjacent to the pressure chamber with a wall of a piezoelectric body interposed therebetween.
|Instant, in-situ, nondestructive material differentiation apparatus and method|
Specular, ultrasonic, piezoelectric, detection devices provide real-time, analytical, edge finding in tissues during tumor surgery. Piezoelectric probe sensors at high frequencies (e.g., 10 to 100 mhz) characterize microstructure of cells and tissues.
Provided is an electronic device including a housing and an acoustic device configured to generate vibration sound that is transmitted through vibration of a part of a human body. The acoustic device includes a panel configured to be joined to the housing; a piezoelectric element configured to be joined to the panel for vibrating the panel; and a vibration adjusting unit configured to be joined to the panel and vibrated together with the panel by the piezoelectric element.
A multifunctional earphone is disclosed. The multifunctional earphone includes a main body having an electroacoustic element incorporated therein for serving as an earphone, an ear-insertion body having a sound tube portion bonded with the main body, a wing portion extending around from the sound tube portion, and an acceleration sensor serving as a microphone embedded in the wing portion and formed a configuration such that the outer periphery of the wing portion contacts an external auditory meatus of a user's ear.
Provided is an electronic device that is capable of reducing sound leakage from a vibration plate vibrated by a piezoelectric element. An electronic device 1 of the present invention includes: a piezoelectric element 30; and a vibration plate 10 configured to be vibrated by the piezoelectric element 30.
|Piezoelectric device package and method of fabricating the same|
A piezoelectric device package may include: a case having a plurality of terminals formed on a lower surface thereof; a piezoelectric device formed in the case; a temperature measuring device formed on the lower surface of the case and having a thin film form; and a cover member enclosing an upper portion of the case.. .
|Piezoelectric device package and method of fabricating the same|
A piezoelectric device package may include: a case having a plurality of terminals disposed on a lower surface thereof; a piezoelectric device disposed in the case; a temperature measuring device disposed on one surface of the piezoelectric device in the case and having a thin film form; and a cover member enclosing an upper portion of the case.. .
There is disclosed a transducer apparatus for acoustic communications through a substrate at a predetermined centre frequency, the apparatus comprising: —an active piezoelectric element for generating an acoustic signal; an intermediate layer, having a surface for accommodating the piezoelectric element, and having a first array of protrusions on a surface opposite the surface for accommodating the piezoelectric element; and a second array of protrusions at the substrate, wherein the active piezoelectric element is mounted onto the intermediate layer, and the intermediate layer is secured in position relative to the substrate such that the first array of protrusions faces the second array of protrusions such that the acoustic signal may propagate through the first and second arrays. There are further disclosed a method of mounting such an apparatus and a plate suitable for use in the transducer apparatus..
|Ultrasonic receiver with coated piezoelectric layer|
This disclosure provides systems, methods and apparatus related to an ultrasonic receiver for detecting ultrasonic energy received at a first surface of the ultrasonic receiver. The ultrasonic receiver includes an array of pixel circuits disposed on a substrate, each pixel circuit in the array including at least one thin film transistor (tft) element and having a pixel input electrode electrically coupled to the pixel circuit.
|Optical deflector including separated piezoelectric portions on piezoelectric actuators and its designing method|
In an optical deflector including a mirror, a frame, torsion bars, first and second piezoelectric actuators coupled to both of the torsion bars, and first and second coupling bars, each of the first and second piezoelectric actuators is divided into first, second and third areas in accordance with a polarization polarity distribution obtained by performing a simulation upon the optical deflector where piezoelectric portions with no slits are hypothetically provided in the first and second piezoelectric actuators while a predetermined rocking operation is performed upon the mirror. First piezoelectric portions are formed in the first and third areas of the first piezoelectric actuator, and second piezoelectric portions are formed in the first and third areas of said second piezoelectric actuator.
|Light scanning apparatus, light scanning control apparatus, and light scanning unit|
A light scanning apparatus includes torsion beams supporting a mirror supporting portion on opposite sides of the mirror supporting portion along an axis direction, the mirror supporting portion being swung around the axis direction by the torsion beams; a pair of drive beams sandwiching the mirror and the mirror supporting portion in a direction orthogonal to the axis direction; connection beams that connect mutually facing sides of each drive beam with the torsion beams; and a piezoelectric sensor formed on the connection beams and detecting displacement of the connection beams caused by a swing of the torsion beams around the axis when the mirror swings by a drive voltage, wherein a first bias voltage having a positive or negative polarity is applied to an upper electrode of the piezoelectric sensor, and a second bias voltage having an opposite polarity is applied to a lower electrode.. .
|Piezoelectric material, piezoelectric element, liquid discharge head, ultrasonic motor, and dust removing device|
Provided is a piezoelectric material having high curie temperature, high insulation property, and high piezoelectric performance, the piezoelectric material including a perovskite-type metal oxide represented by the general formula (1): xbatio3-ybifeo3-zbi(m0.5ti0.5)o3, where m represents at least one kind of element selected from the group consisting of mg, ni, and zn, x represents a value satisfying 0.25≦x≦0.75, y represents a value satisfying 0.15≦y≦0.73, and z represents a value satisfying 0.02≦z≦0.60, provided that x+y+z=1 is satisfied in which the perovskite-type metal oxide contains v, and content of the v is 0.0005 mol or larger and 0.0050 mol or smaller with respect to 1 mol of the perovskite-type metal oxide. In addition, provided are a piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust removing device, which use the piezoelectric material..
|Piezoelectric device, inkjet equipment using the piezoelectric device, and the inkjet printing method|
The fifth regions of the first driving units are located along a straight line separate from a straight line along which the sixth regions of the second driving units are located.. .
|Devices and methods of sensing|
A method is disclosed, including detecting a signal representative of an object with a piezoelectric device. A display is powered up from a sleep mode based upon the detected signal.
|Cost-effective single crystal multi-stake actuator and method of manufacture|
This invention pertains to piezoelectric actuators made of single crystal active elements which not only exhibit uniform and superior displacement in the axial direction but also of lower cost to produce than full single crystal ring or tube actuators. Said multi-stake actuator is made up of multiple longitudinal (d33) or transverse (d3i or d32) mode piezoelectric single crystal active elements, bonded together by epoxy with the aid of shaped edge- and top and bottom washer-stiffeners which are configured to suit various application needs..
|Solidly mounted acoustic resonator having multiple lateral features|
A solidly mounted resonator (smr) includes an acoustic resonator on a substrate, the acoustic resonator having multiple acoustic impedance layers having different acoustic impedances, respectively. The smr further includes a bottom electrode on a top acoustic impedance layer of the plurality of acoustic impedance layers, a piezoelectric layer on the bottom electrode, a top electrode on the piezoelectric layer, and multiple lateral features on a surface of the top electrode.
|Acoustic wave device and method of fabricating the same|
An acoustic wave device includes: a support substrate; a piezoelectric substrate; and a cap substrate, wherein the cap substrate includes a first region located along an outer peripheral portion of the cap substrate, a second region located along an inside of the first region and having a thickness less than a thickness of the first region, and a third region located inside the second region and having a thickness less than a thickness of the second region, and a surface of the first region is bonded to the surface of the outer peripheral portion of the support substrate, a surface of the second region is bonded to a surface of an outer peripheral portion of the piezoelectric substrate, and a surface of the third region is located away from a surface of the piezoelectric substrate to form a space for the excitation electrode to vibrate.. .
|Piezoelectric resonators for reduction of noise and vibration in vehicle components|
Disclosed herein is a piezoelectric resonator for damping noise from a vehicle component. The piezoelectric resonator includes a first piezoceramic material having a first electrode, the first piezoceramic material disposed at a first location on one side of the vehicle component and a second piezoceramic material having a second electrode, the second piezoceramic material disposed at a second location on an opposing side of the vehicle component, wherein the first location is opposite the second location.
|Ultrasonic wave converter, electric pulse generating device, and ultrasonic wave generating device comprising same|
An ultrasonic wave generating device includes: an ultrasonic transducer; and a variable pulse generating device which generates and outputs an electric pulse. The ultrasonic transducer comprises a piezoelectric element which receives electric pulse from the electric pulse generating device and vibrates, and a memory which stores characteristic information of the ultrasonic transducer.
|Method for manufacturing piezoelectric bulk acoustic wave element and piezoelectric bulk acoustic wave element|
A method for manufacturing a piezoelectric bulk acoustic wave element by forming a sacrificial layer on a part of a primary surface of a substrate. A piezoelectric film sandwiched between a pair of electrodes is formed on the primary surface of the substrate so as to cover the sacrificial layer, the piezoelectric film being formed from scandium-containing aluminum nitride having a scandium atomic concentration with respect to the total number of scandium atoms and aluminum atoms of more than 24 atomic percent.
|Bulk acoustic wave resonator having piezoelectric layer with varying amounts of dopant|
A bulk acoustic wave (baw) resonator structure includes a first electrode disposed over a substrate, a piezoelectric layer disposed over the first electrode, and a second electrode disposed over the piezoelectric layer. The piezoelectric layer includes undoped piezoelectric material and doped piezoelectric material, where the doped piezoelectric material is doped with at least one rare earth element, for improving piezoelectric properties of the piezoelectric layer and reducing compressive stress..
|Drive device, electronic component carrying device, electronic component inspection device, robot hand, and robot|
A drive device includes plural moving portions, piezoelectric motors that move the moving portions, at least one drive circuit that drives the piezoelectric motors, and a connection/disconnection portion that connects and disconnects the piezoelectric motors and the drive circuit. The number of drive circuits is fewer than the number of piezoelectric motors..
|All electric piezoelectric finger sensor (pefs) for soft material stiffness measurement|
A pefs (piezoelectric finger sensor) acts as an “electronic finger” capable of accurately and non-destructively measuring both the young's compression modulus and shear modulus of tissues with gentle touches to the surface. The pefs measures both the young's compression modulus and shear modulus variations in tissue generating a less than one-millimeter spatial resolution up to a depth of several centimeters.
|Ultrasonic sensor with bonded piezoelectric layer|
This disclosure provides systems, methods and apparatus related to an ultrasonic sensor for detecting ultrasonic energy. In some implementations, the ultrasonic sensor includes a piezoelectric receiver layer bonded with an adhesive to an array of pixel circuits disposed on a substrate, each pixel circuit in the array including at least one thin film transistor (tft) element and having a pixel input electrode electrically coupled to the pixel circuit.
|High accuracy level transducer|
A level transducer has a power supply module, a tuning fork module, a sensing-phase corrector and a controller. The tuning fork module has a tuning fork, at least one piezoelectric driving element, and at least one piezoelectric sensing element.
|Touch type input termnal|
A touch type input terminal that includes a base substrate, a piezoelectric sensor and an electrostatic sensor which are flat membrane-shaped, respectively. The electrostatic sensor includes a plurality of segment electrodes on a first main surface of a base film and a plurality of common electrodes on a second main surface.
|Haptic feedback actuator module and electronic device including the same|
There is provided a haptic feedback actuator module including: a base member including an insertion groove formed in an edge thereof and communications grooves formed at both ends of the insertion groove; a piezoelectric element inserted into the insertion groove; an impact transferring member installed in the communications groove and contacting a display panel or spaced apart from the display panel during deformation of the piezoelectric element; and a connecting member having one end connected to the piezoelectric element and the other end connected to the impact transferring member.. .
|Piezoelectric vibration module and vibration generating apparatus including the same|
There are provided a piezoelectric vibration module and a vibration generating apparatus including the same. The piezoelectric vibration module includes: a piezoelectric actuator including a piezoelectric element deformed in both a first direction and a second direction perpendicular to the first direction through the application of electrical power thereto; at least one first rod transferring deformation force of the piezoelectric actuator in the first direction; at least one second rod converting deformation force of the piezoelectric actuator in the second direction into deformation force in the first direction and transferring the converted deformation force; and a mass body connected to the first and second rods and disposed on the piezoelectric actuator so that displacement is generated in the first direction..
|Vibration generating apparatus|
There is provided a vibration generating apparatus including: a housing having an internal space; an elastic member having an edge part fixedly attached to the housing; a piezoelectric element fixedly attached to a lower surface of a central portion of the elastic member; and a mass body fixedly attached to an upper surface of the central portion of the elastic member.. .
|Vibration generating apparatus and electronic apparatus including the same|
A vibration generating apparatus may include a housing having an internal space, an elastic member mounted in the internal space, a piezoelectric element having one surface thereof mounted on the elastic member, and a mass body fixed to the other surface of the piezoelectric element by a buffering adhesive.. .
|Power generation unit, secondary cell, and electronic apparatus|
A power generation unit includes a deforming member adapted to repeatedly deform a piezoelectric element, a pair of electrodes provided to the piezoelectric element, an inductor disposed between the pair of electrodes, and constituting a resonant circuit together with a capacitive component of the piezoelectric element, a first switch connected in series to the inductor, a member adapted to detect a timing at which a deformation direction of the deforming member is switched, a full bridge rectifier adapted to rectify a current output from the pair of electrodes, a capacitor connected to the full bridge rectifier, and adapted to store a current supplied from the full bridge rectifier, a second switch connected between either one of the pair of electrodes and the capacitor, and a control circuit adapted to operate the first switch and the second switch.. .
|Piezoelectric element and electronic component including the same|
A piezoelectric element includes an element layer, an electrode layer including one or more positive electrode layers and one or more negative electrode layers repeatedly stacked to alternate with each other on the element layers in a vertical direction, a primary positive electrode connection member connecting the positive electrode layers, a primary negative electrode connection member connecting the negative electrode layers, at least one secondary positive electrode connection member, at least one secondary negative electrode connection member, and a primary electrode connected to the primary positive electrode connection member and the primary negative electrode connection member and configured of a pair of electrodes, and at least one secondary electrode spaced apart from the primary electrode and configured of a pair of electrodes.. .
|Drive method for non-contact power supply device, non-contact power supply device, and non-contact power supply system|
A power supply device (2) is provided with a push-type power generator (4). When a push-button (5) on the push-type power generator (4) is pushed, a variable voltage is generated by a piezoelectric element (6) that excites a primary coil (l1).
|Detecting sudden changes in acceleration in semiconductor device or semiconductor packaging containing semiconductor device|
An approach for detecting sudden changes in acceleration in a semiconductor device or semiconductor package containing the semiconductor device is disclosed. In one embodiment, a piezoelectric sensor is embedded in a semiconductor die.
|Materials and methods for the preparation of nanocomposites|
Disclosed herein is an isolable colloidal particle comprising a nanoparticle and an inorganic capping agent bound to the surface of the nanoparticle, a method for making the same in a biphasic solvent mixture, and the formation of structures and solids from the isolable colloidal particle. The process can yield photovoltaic cells, piezoelectric crystals, thermoelectric layers, optoelectronic layers, light emitting diodes, ferroelectric layers, thin film transistors, floating gate memory devices, phase change layers, and sensor devices..
|Three-way three-position control valve having a piezoelectric or magnetostrictive actuator, and fuel-injection system comprising the aforesaid valve|
An electrically actuated control valve has three mouths and three operating positions, in which the three mouths includes a first mouth for inlet of a working fluid, and a second mouth and a third mouth for outlet of the working fluid. The three operating positions include a first operating position in which a passage of fluid from the first mouth to the second mouth and the third mouth is enabled, a second operating position in which a passage of fluid from the first mouth to only one of said second and third mouths is enabled, and a third operating position in which the passage of fluid from the first to the second mouth and the third mouth is disabled.
A self-charging power pack (300) includes a cathode (312) and an anode (310) that is spaced apart from the cathode (312). An electrolyte (318) is disposed between the anode (310) and the cathode (312).
A piezoelectric fan includes a vibrating plate including blades and a base that are integral. Piezoelectric elements are mounted on the blade on the side of the base.
|Electronic device and method of manufacturing the electronic device|
An electronic device includes a substrate; and a plurality of thin-film elements formed on the substrate. Further, the thin-film element includes a thin-film section having a function selected from a group including piezoelectric effect, inverse piezoelectric effect, charge storage, semiconductivity, and conductivity, and the plurality of thin-film elements includes the thin-film sections having two or more different functions..
An exemplary embodiment of the present invention includes a support unit, at least two or more connection units extended from the support unit, a lens coupling unit connected to each of the connection units, formed at an inner surface with a window and coupled to at least one or more sheets of lenses, and a piezoelectric driving unit formed at each of the connection units for ascending or descending the connection units and the lens coupling unit.. .
|Fast optical shuttering system|
The system (1) has at least one fabry-pérot cavity (3) with an adjustable gap (e), of which a gap value known as the nominal value allows a laser beam (4) of corresponding frequency to pass through said fabry-pérot cavity (3), controllable piezoelectric actuation means (5a), capable of causing said gap (e) to vary, within a range of gap values including said nominal value, and a control unit (6) to control said actuation means (5a) so that it causes the gap (e) to vary in accordance with a periodic time function.. .
|Localized key-click feedback|
Disclosed herein are techniques and systems for providing simulated, haptic feedback that is local to physical, non-actuating keys of a keyboard. A keyboard includes a plurality of non-actuating keys defined in a cover portion of the keyboard, a plurality of force-producing mechanisms coupled to a substrate underneath and adjacent the cover portion.
|Bulk acoustic wave resonator comprising a boron nitride piezoelectric layer|
A bulk acoustic wave (baw) resonator structure comprises: a first electrode disposed over a substrate; a piezoelectric layer disposed over the first electrode, the piezoelectric layer comprising boron nitride (bn); and a second electrode disposed over the first piezoelectric layer.. .
An oscillator includes: a piezoelectric material to vibrate; a first inverting amplifier; a second inverting amplifier; a first output electrode to apply an output signal of the first inverting amplifier to the piezoelectric material; a second output electrode to apply an output signal of the second inverting amplifier to the piezoelectric material; a first input electrode to receive a voltage signal generated by the piezoelectric material and output the voltage signal to the first inverting amplifier; and a second input electrode to receive the voltage signal and output the voltage signal to the second inverting amplifier, wherein the first and second output electrodes are coupled to the piezoelectric material so that faces of the piezoelectric material move in opposite directions, and the first and second input electrodes are coupled to the piezoelectric material so that the voltage signals are input to the first and second input electrodes.. .
|Arrangement for driving and drive method for a piezoelectric actuator|
A method is disclosed for driving a piezoelectric actuator with a piezoelectric stack, which is operated as an actuating element of an injector. The piezoelectric stack is polarized during production by a polarization process initially with a first field strength, which results in a first length of the piezoelectric stack.
A piezoelectric device includes a first electrode film, a piezoelectric film disposed on the first electrode film, and a second electrode film disposed on the piezoelectric film. At least one of the first and second electrode films is composed of an alloy, and a main component of the alloy is a metal selected from the group consisting of ti, al, mg, and zn.
|Thin-film piezoelectric element, thin-film piezoelectric actuator, thin-film piezoelectric sensor, hard drive disk, and inkjet printer|
A thin film piezoelectric element according to the present invention includes a potassium sodium niobate thin film having a structure in which a plurality of crystal grains are present in a film thickness direction; and a pair of electrode films sandwiching the potassium sodium niobate thin film. When the potassium sodium niobate thin film is divided into three regions of the same thickness in the film thickness direction and average crystal grain sizes a1, a2, and a3 of the respective regions are determined, a ratio m/m of the smallest average crystal grain size m among a1, a2, and a3 to the largest average crystal grain size m among a1, a2, and a3 is 10% to 80%.
|Piezoelectric bulk - wave resonator|
A piezoelectric bulk-wave resonator has a single-crystal linbo3 substrate whose euler angles are in the ranges of about (78° to 106°, 78° to 104°, 18° to 53°), a first driver electrode on a first main surface of the single-crystal linbo3 substrate, and a second driver electrode on a second main surface. The first driver electrode and the second driver electrode overlap with the single-crystal linbo3 substrate therebetween.
|Thin film bulk acoustic resonator and method for manufacturing same|
A thin film bulk acoustic resonator and a method of manufacturing the same is disclosed. The thin film bulk acoustic resonator includes an acoustic resonator including a first electrode, a second electrode, and a piezoelectric layer disposed between the first electrode and the second electrode; an air gap disposed below the acoustic resonator and above a substrate to reflect the acoustic wave; and an anchor disposed on each of both surfaces of the air gap and having the same thickness as the air gap..
|Piezoelectric vibrating device|
Provided is a piezoelectric vibrating device including a case provided with a certain space therein, a piezoelectric vibrating member provided in the case and vibrating according to an applied voltage, a weight member provided in the case and connected to a part of the piezoelectric vibrating member in a vibration direction of the piezoelectric vibrating member, and a limitation member for limiting movement of the weight member.. .
|Piezoelectric polymer material and method for producing same|
A piezoelectric polymer material comprising a helical chiral polymer having a weight average molecular weight of from 50,000 to 1,000,000 and optical activity, the piezoelectric polymer material having: crystallinity as obtained by a dsc method of from 40% to 80%; a transmission haze with respect to visible light of 50% or less; and a product of the crystallinity and a standardized molecular orientation morc, which is measured with a microwave transmission-type molecular orientation meter at a reference thickness of 50 μm, of from 40 to 700.. .
|Piezoelectric mems microphone|
A piezoelectric mems microphone comprising a multi-layer sensor that includes at least one piezoelectric layer between two electrode layers, with the sensor being dimensioned such that it provides a near maximized ratio of output energy to sensor area, as determined by an optimization parameter that accounts for input pressure, bandwidth, and characteristics of the piezoelectric and electrode materials. The sensor can be formed from single or stacked cantilevered beams separated from each other by a small gap, or can be a stress-relieved diaphragm that is formed by deposition onto a silicon substrate, with the diaphragm then being stress relieved by substantial detachment of the diaphragm from the substrate, and then followed by reattachment of the now stress relieved diaphragm..
|Method for manufacturing a piezoelectric ceramic body|
The present invention relates to a method of manufacturing a piezoelectric ceramic body and devices therefrom. The method comprises mixing a piezoelectric ceramic powder with a polymer binder and surfactant to form a slip mixture, casting the slip mixture into a mold and setting to the slip mixture in the mold to form a green body, cutting the green body to form a cut green body with an array of micron-sized ceramic elements and separation, and sintering the cut green body to form a sintered ceramic body.
|Piezoelectric ceramic and piezoelectric device containing the same|
A piezoelectric ceramic contains a major proportion of potassium sodium niobate and has a carbon content after firing of 55 to 1,240 ppm by mass.. .
|Piezoelectric valve, and optical granulated substance sorter equipped with air-blowing means that uses this piezoelectric valve|
A piezoelectric valve whose assembly work can be efficiently performed. A piezoelectric valve according to this invention includes a valve main body having a gas pressure chamber which receives compressed gas supplied from the outside, a plate which is disposed inside the valve main body and is fixed to the valve main body, and actuators each of which has a valve element, a piezoelectric element generating, in the form of a displacement, driving force required for operation of the valve element, and a displacement magnification mechanism for magnifying a displacement of the piezoelectric element and causing the magnified displacement to act on the valve element, are fixed to each of two surfaces of the plate, and are disposed inside the valve main body together with the plate..
|Heat dissipating system|
A heat dissipating system including a casing body, a heat source and a piezoelectric fan is provided. The casing body includes an upper casing and a bottom case, wherein at least one of the upper casing and the bottom casing includes at least one air inlet.
|Stress-detecting element, sensor module, and electronic apparatus|
A stress-detecting element includes a support body, a support film, a first piezoelectric element, first and second elastic parts. The support body has an opening part with first and second rectilinear sections extending parallel to each other.
|Ultrasound probe and method of producing the same|
An ultrasound probe comprises: a backing material; a plurality of inorganic piezoelectric elements arranged on a top surface of the backing material; a first acoustic matching layer separated into a plurality of pieces disposed on the plurality of inorganic piezoelectric elements; and a second acoustic matching layer separated into a plurality of pieces disposed on the first acoustic matching layer, wherein the second acoustic matching layer comprises an upper organic layer constituting a plurality of organic piezoelectric elements, and a lower organic layer for performing, together with the upper organic layer, acoustic matching for the plurality of inorganic piezoelectric elements.. .