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 Piezoelectric speaker driving device patent thumbnailnew patent Piezoelectric speaker driving device
A piezoelectric speaker driving device includes a driving amplification unit, a signal tuning unit, and a piezoelectric speaker; wherein, the driving amplification unit is configured to amplify a signal source, and transmit an amplified signal to the signal tuning unit; the signal tuning unit is configured to filter the amplified signal to filter out a high-frequency noise, and regulate an impedance characteristic of the piezoelectric ceramic to increase a load impedance of a high-frequency part of the driving circuit so as to reduce the driving current of the high-frequency part, and transmit the regulated driving signal to the piezoelectric speaker to drive the piezoelectric speaker. Wherein, the signal tuning unit may include a low-pass filtering circuit and a regulation impedance..
Zte Corporation


 Piezoelectric ceramic dual-band bass-enhanced earpiece patent thumbnailnew patent Piezoelectric ceramic dual-band bass-enhanced earpiece
A piezoelectric ceramic dual-band bass-enhanced earpiece includes an earphone shell, a moving coil speaker assembly and a piezoelectric ceramic speaker component. The earphone shell includes an acoustic output orifice.
Jetvox Acoustic Corp.


 Elastic wave device patent thumbnailnew patent Elastic wave device
An elastic wave device includes a multilayer film provided on a support substrate and including a piezoelectric thin film and a layer other than the piezoelectric thin film, an interdigital transducer electrode provided on one surface of the piezoelectric thin film, and an external connection terminal electrically connected to the interdigital transducer electrode. In a plan view, the multilayer film is partially absent or omitted in a region outside a region where the interdigital transducer electrode is provided, and the elastic wave device further includes a first insulating layer provided on the support substrate in at least a portion of a region where the multilayer film is absent or omitted..
Murata Manufacturing Co., Ltd.


 Converter for converting energy to be recovered and electricity generator patent thumbnailnew patent Converter for converting energy to be recovered and electricity generator
A converter for converting a variation in energy to be recovered, the converter including: a transducer layer extending essentially parallel to a reference plane and configured to transform the variation in the energy to be recovered into a mechanical deformation, the transducer layer comprising: a plurality of first blocks made from a magnetostrictive or shape-memory material, the first blocks being delimited in relation to one another by side edges, and regions that do not contain the material of the first block, the regions being inserted between the side edges of the first blocks; and a piezoelectric layer secured to the transducer layer. Each of the first blocks has a preferential axis of deformation parallel to the reference plane..
Centre National De La Recherche Scientifique


 Converter for converting a variation in energy to be recovered into a potential difference patent thumbnailnew patent Converter for converting a variation in energy to be recovered into a potential difference
A converter including a first transducer that can lengthen inside at least a first deformation zone and simultaneously shrink inside at least a different second deformation zone. Inner faces of second and third electromechanical transducers are secured respectively, with no degree of freedom, substantially to the first and second deformation zones of the layer of the first transducer.
Institut Polytechnique De Grenoble


 Piezoelectric element, piezoelectric element applying device, and manufacturing  piezoelectric element patent thumbnailnew patent Piezoelectric element, piezoelectric element applying device, and manufacturing piezoelectric element
(kx, na1-x)nbo3   (1). .

 Process for manufacturing a pyroelectric and/or piezoelectric drive patent thumbnailnew patent Process for manufacturing a pyroelectric and/or piezoelectric drive
A process for manufacturing a piezoelectric and/or pyroelectric device comprising a polyvinylidene fluoride film, the process comprising a step of forming at least one portion of a layer of a solution comprising a solvent and a compound comprising polyvinylidene fluoride and a step of irradiating the portion with pulses of at least one ultraviolet radiation. The irradiating step enables the formation of at least two β crystalline phases having different orientations..
Commissariat à I'Énergie Atomique Et Aux Énergies Alternatives


 Electronic device, and manufacturing  electronic device patent thumbnailnew patent Electronic device, and manufacturing electronic device
An electronic device includes a drive substrate (a pressure chamber substrate and a vibration plate) including a piezoelectric element and electrode wirings related to driving of the piezoelectric element formed thereon, and a sealing plate bonded thereto, the electrode wirings are made of wiring metal containing gold (au) on the drive substrate through an adhesion layer which is a base layer, and has a removed portion in which a portion of the wiring metal in a region containing a part bonded to a bonding resin is removed and the adhesion layer is exposed.. .
Seiko Epson Corporation


 A device for converting a movement of a user into a voltage patent thumbnailnew patent A device for converting a movement of a user into a voltage
A device (10) for converting a movement of a user into a voltage comprises a neck cord (20), a piezoelectric sensor (30) and a printed circuit board (40). The neck cord is coupled to the piezoelectric sensor and provides in use a pulling force that acts on the piezoelectric sensor in a first direction.
Koninklijke Philips N.v.


 Method for manufacturing rectangular parallelepiped-shaped single crystal, rectangular parallelepiped-shaped single crystal,  manufacturing ceramics, ceramics, piezoelectric element, piezoelectric device, and electronic device patent thumbnailnew patent Method for manufacturing rectangular parallelepiped-shaped single crystal, rectangular parallelepiped-shaped single crystal, manufacturing ceramics, ceramics, piezoelectric element, piezoelectric device, and electronic device
This invention is a method for manufacturing a rectangular parallelepiped-shaped single crystal containing sodium niobate of a perovskite structure as the main component, and the method includes a process of heating a mixture 1 of bismuth sodium niobate which is formed from particles containing a plurality of crystals represented by general formula (1): bi2.5nam−1.5nbmo3m+3 (m is an integer of 2 or more) and in which an average value ma of the m values is larger than 6 and sodium containing alkali metal halide at 1200° c. Or more and 1250° c.
Canon Kabushiki Kaisha


new patent

Head and liquid ejecting apparatus


Provided is a head including a channel formation substrate that is provided with a pressure generating chamber which communicates with a nozzle for ejecting a liquid; a piezo element that includes a first electrode which is provided on one surface side of a channel formation substrate, a piezoelectric layer which is provided on the first electrode, and a second electrode which is provided on the piezoelectric layer; and a driving circuit board that is bonded to the one surface side of the channel formation substrate via an adhesive layer, and is provided with a driving circuit for driving the piezo element, in which the piezo element and the driving circuit are electrically connected to each other via a bump which is provided on any one of the channel formation substrate and the driving circuit board, and in which the bump and the adhesive layer are provided above the piezoelectric layer of the piezo element.. .
Seiko Epson Corporation


new patent

Electronic device, and manufacturing electronic device


An electronic device includes a first drive substrate (a pressure chamber substrate and a vibration plate) including a piezoelectric element formed thereon, and a second substrate (a sealing plate) bonded to the first drive substrate, a bonding resin forms an accommodating space that surrounds and accommodates a drive region of the piezoelectric element between the first substrate and the second substrate, and a reinforced resin that supports the first substrate and the second substrate in a position deviated from the drive region in the accommodating space.. .
Seiko Epson Corporation


new patent

Droplet discharging apparatus, controlling droplet discharging apparatus and image forming apparatus including droplet discharging apparatus


A droplet discharging apparatus includes a recording head that includes pressure chambers, piezoelectric elements, and an in-head reservoir, provided near the pressure chambers; a liquid circulation unit that includes a liquid reservoir and circulates liquid between the in-head reservoir and the liquid reservoir; a drive waveform generation unit that generates a drive waveform that drives each of the piezoelectric elements; a remaining oscillation detection unit that detects remaining oscillation generated in at least one of the pressure chambers after driving the respective piezoelectric element; a status determining unit that determines a sedimentation status of a component in liquid in the in-head reservoir based on the detected remaining oscillation; and a control unit that controls a liquid circulation operation of the liquid circulation unit in order to dissolve the sedimentation status of the component in the liquid in the in-head reservoir based on the determined sedimentation status.. .
Ricoh Company, Ltd.


new patent

Liquid ejecting apparatus, drive circuit, and head unit


A liquid ejecting apparatus includes a power supply unit that boosts a single voltage and includes multiple voltage boosting circuits which generate power supply voltages different from each other; a drive circuit that amplifies an original drive signal based on a power supply voltage which is generated by at least one of the multiple voltage boosting circuits and generates a drive signal that is applied; and an ejecting unit that includes a piezoelectric element which becomes displaced in accordance with the drive signal, in which the power supply unit controls the voltage boosting circuit, which generates the power supply voltage that is not used for amplification, to stop voltage boosting.. .
Seiko Epson Corporation


new patent

Ultrasonic transmitter


The head (2) is movable within the transmitter (1), which includes biasing element (4, 5, 50) suitable for urging the head (2) and the piezoelectric element (3) so as to maintain their mutual contact during repeated dimensional changes of the piezoelectric element (3).. .

new patent

Suction device


Provided is a suction device that can suppress sound and vibration during use. A suction device includes a flow-passage forming section (1) having a suction port (20) from which fluid is sucked, a discharge port (29) from which the fluid is discharged, and a flow passage (2) which is sealed from an outside except at the suction port (20) and the discharge port (29) and through which the fluid flows, and a piezoelectric driving part (33) that generates a flow of the fluid in the flow passage (2).
Murata Manufacturing Co., Ltd.


new patent

Sensor device for detecting displacements of human's body surface accompanying respiration


In a sensor device which detects pressure variations owing to displacements of a body surface of a subject by respiration through variations of the output impedance of a piezoelectric vibrator, the pressure variations can be more efficiently transmitted to the piezoelectric vibrator. The sensor device, attached to a subject's body surface, comprises a contact piece contacting the body surface; a displacement-signal convertor which converts the displacements of the body surface into electrical signals; and an outputting device which outputs the electrical signals to an external unit; the sensor device is clamped between the body surface of the subject and an upper edge portion of a subject's bottom garment, and the contact piece is arranged in one side surface of a housing, and a stopping member which can be attached with the upper edge portion of the bottom garment in the other side surface of the housing..

new patent

Sensor device for detecting displacements of human's body surface accompanying respiration


In a sensor device which detects pressure variations owing to displacements of a body surface of a subject by respiration through variations of the output impedance of a piezoelectric vibrator, the pressure variations owing to displacements can be more efficiently transmitted to the piezoelectric vibrator. The sensor device, attached to a subject's body surface and detecting displacements of the body surface accompanying respiration of the subject, comprises a contact piece having a contact surface which contacts the body surface when the sensor device is attached to the body surface; a displacement-signal convertor which is connected with the contact piece and converts the displacements of the body surface into electrical signals; and an outputting device which outputs the electrical signals to an external unit; wherein the contact surface of the contact piece is a curved surface projecting outward in a direction from its periphery to its center..

Parametric in-ear impedance matching device


An ultrasonic audio transducer system includes an ultrasonic speaker. The ultrasonic speaker may be an electrostatic emitter, a piezoelectric emitter (single crystal or stack), a piezoelectric film emitter, or any other emitter capable of emitting ultrasound.
Turtle Beach Corporation


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Handheld device


A handheld device is disclosed. A housing member includes a first surface and a second surface.
Kyocera Corporation


Parametric in-ear impedance matching device


An ultrasonic audio transducer system includes an ultrasonic speaker. The ultrasonic speaker may be an electrostatic emitter, a piezoelectric emitter (single crystal or stack), a piezoelectric film emitter, or any other emitter capable of emitting ultrasound.
Turtle Beach Corporation


Tunable q resonator


A tunable q resonator using a capacitive-piezoelectric transducer provides a flexible top electrode above an aln resonator. The top electrode can be pulled electrostatically towards the resonator and substrate, forming a frictional contact with either the resonator or the combined resonator-electrode structure to the substrate, allowing for electrical tuning the q of the resonator.
The Regents Of The University Of California


Piezoelectric vibrating piece and piezoelectric vibrator


A pair of vibrating arm portions are disposed lined up in a second direction perpendicular to a first direction and are configured such that base end sides thereof in the first direction are fixed to a base portion. A pair of inclined surfaces are formed on both sides in the second direction on the base end side of the vibrating arm portion so that a width of the vibrating arm portion in the second direction is gradually widened from the distal end side to the base end side.
Sii Crystal Technology Inc.


Power generation device for mobile body


A power generation device for a mobile body includes power generating units and a holding member. Each power generating unit includes an elastically deformable base member and a piezoelectric film, which are laminated alternately.
National University Corporation Hiroshima Universi Ty


System for converting mechanical and/or thermal energy into electrical power


A system for converting energy, comprising a first device comprising a deformable enclosure containing thermo-reactive molecules suitable for deforming the enclosure when their temperature exceeds a threshold temperature, and a second pyroelectric and/or piezoelectric device making contact with the enclosure.. .
Commissariat à L'Énergie Atomique Et Aux Énergies Alternatives


Converter for converting energy to be recovered and electricity generator


A converter including a transducer layer which moves anchoring points to deform a piezoelectric diaphragm by bending. The converter includes a rigid arm between each anchoring point and a point for securing to the piezoelectric diaphragm to which it is attached, the rigid arm being tensioned between the anchoring point and the securing point and configured to transform movement of the anchoring points into a movement that deforms the piezoelectric diaphragm between bent and less bent positions.
Commissariat À L'Énergie Atomique Et Aux Énergies Alternatives


Micro stage using piezo elements


Disclosed herein is a micro stage using a piezoelectric element that can be reliably operated even in a vacuum environment. In a particle column requiring a high precision, for example, a microelectronic column, the micro stage can be used as a stage with micro or nano degree precision for alignment of parts of the column, or for moving a sample, and so on..

Driving device


A driving device that causes a movable body to move stably with minimal backward movement. The driving device includes a plate-shaped driving unit with an elastic body and a piezoelectric element joined to a main surface of the elastic body.
Murata Manufacturing Co., Ltd.


Piezoelectric energy harvesting device and fabricating the same


A flexible piezoelectric energy harvesting device includes a first flexible electrode substrate, a piezoelectric layer disposed on the first flexible electrode substrate, and a second flexible electrode substrate disposed on the piezoelectric layer. The piezoelectric layer may include a plurality of first piezoelectric lines spaced apart from each other in one direction and a plurality of second piezoelectric lines respectively filling spaces between the first piezoelectric lines..
Electronics And Telecommunications Research Institute


Piezoelectronic switch device for rf applications


A piezoelectronic switch device for radio frequency (rf) applications includes a piezoelectric (pe) material layer and a piezoresistive (pr) material layer separated from one another by at least one electrode, wherein an electrical resistance of the pr material layer is dependent upon an applied voltage across the pe material layer by way of an applied pressure to the pr material layer by the pe material layer; and a conductive, high yield material (c-hym) comprising a housing that surrounds the pe material layer, the pr material layer and the at least one electrode, the c-hym configured to mechanically transmit a displacement of the pe material layer to the pr material layer such that applied voltage across the pe material layer causes an expansion thereof and an increase the applied pressure to the pr material layer, thereby causing a decrease in the electrical resistance of the pr material layer.. .
International Business Machines Corporation


Sound-absorbing material


A sound-absorbing material has a membrane having multiple piezoelectric fibers, the fiber density of the membrane is below 50 g/m2, the thickness of the membrane is below 1 mm, sound-absorbing coefficient of the membrane is larger than 0.1 at absorbing frequency at 100 hz+/-10%, and the sound-absorbing coefficient of the membrane is over 0.05 at absorbing frequency at 800 hz to 1000 hz. Pvdf electrospinning nanofiber membranes of the present invention are thinner and more flexible compared to conventional sound-absorbing material, the membranes in the present invention performs excellent low frequency sound absorption with very thin membrane..
National Taiwan University Of Science And Technology


Refrigeration through voltage-controlled entropy change


A method for refrigeration through voltage-controlled entropy change includes applying a voltage signal to a piezoelectric material to generate strain in the piezoelectric material, generating strain in a magnetic material attached to the piezoelectric material, and generating a change in a temperature of the magnetic material in response to the strain in the magnetic material.. .
Nutech Ventures


Mems transducer and manufacturing the same


A mems transducer includes a first substrate and a second substrate facing the first substrate. The first substrate includes a piezoelectric diaphragm and a conductive contact structure.
Taiwan Semiconductor Manufacturing Co., Ltd.


Contact patch measurements during hydroplaning events


Systems and methods for determining the contact patch parameters of a tire while rolling on deformable surfaces, such as during a hydroplaning event, are provided. More particularly, a piezoelectric sensor configured to provide a piezoelectric sensor output signal indicative of the time-varying curvature of a rolling tire can be mounted in a tire.

Manufacturing head


Provided is a manufacturing method of a head which includes a channel formation substrate having two piezoelectric actuator rows formed thereon, a driving circuit, and a driving circuit board which is provided with a first bump and a second bump. In the method, the first bump is provided on the outside of the piezoelectric actuator row, on the driving circuit board, an adhesive layer is provided on both sides of the first bump and the second bump, a first through hole and a second through hole are provided on the driving circuit board, a first connection wiring and a second connection wiring which are connected to the driving circuit are provided, and a first electrode of the piezoelectric actuator is electrically connected to the first connection wiring via the first bump and a second electrode is electrically connected to the second connection wiring via the second bump..
Seiko Epson Corporation


Method for controlling inkjet printing apparatus


The present invention lies in a method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the inkjet printing apparatus being provided with a printing head 10 having a plurality of nozzles composed of an opening portion 21 from which ink is discharged, an ink chamber 22 communicating with the opening portion 21 to accommodate ink, and a piezoelectric element 23 attached to the ink chamber 22 via a vibrating plate 24, and the method having a discharging step of performing continuous application to the piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element, thereby discharge ink in the ink chamber 22 from the opening portion 21, and a vibrating step of performing application to the piezoelectric elements 23 of all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.. .

Head and liquid ejecting apparatus


A head includes a channel formation substrate having two piezoelectric actuator rows formed thereon, a driving circuit, and a driving circuit board which is provided with a first bump and a second bump, in which the first bump is provided on the outside of the piezoelectric actuator row, an adhesive layer is provided on both sides of the first bump and the second bump, a first through hole and a second through hole are provided on the driving circuit board, a first connection wiring and a second connection wiring are provided in the first through hole and the second through hole, and a first electrode of the piezoelectric actuator is electrically connected to a first connection wiring via the first bump and a second electrode is electrically connected to a second connection wiring via the second bump.. .
Seiko Epson Corporation


Liquid ejecting head and manufacturing liquid ejecting head


A liquid ejecting head and a method of manufacturing the liquid ejecting head are provided. The liquid ejecting head has a pressure chamber forming substrate that includes a plurality of piezoelectric elements and that is connected to a first surface of a sealing plate, a driver ic that outputs signals that drive the piezoelectric elements and that is provided on a second surface of the sealing plate that is on the opposite side to the first surface, and a power supply wire that supplies electrical power to the piezoelectric elements, that is formed in the second surface of the sealing plate, and that has at least one portion thereof embedded in the sealing plate and a surface thereof exposed on the second surface side..
Seiko Epson Corporation


Mems device, liquid ejecting head, and liquid ejecting apparatus


A mems device includes a protective substrate on which is mounted a driving circuit that drives a piezoelectric actuator and on which is formed an interconnect pattern electrically connected to the driving circuit, and a sealing substrate that includes a first opening and that is bonded to the protective substrate using an adhesive so that part of the interconnect pattern is located between the protective substrate and the sealing substrate. The interconnect pattern includes a connection portion that extends from a bonding region where the protective substrate and the sealing substrate are bonded by the adhesive to the first opening, and that has a connection region electrically connected to the driving circuit.
Seiko Epson Corporation


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The stretched laminated film for use in piezoelectric polymer material, and manufacturing method thereof


The object of the present invention is to provide a laminated film made of polylactic acids which is not prone to delamination while having excellent piezoelectric properties and a manufacturing method thereof. That is, the present invention is obtained by the stretched laminated film manufactured by a co-extrusion process for use in piezoelectric polymer materials, containing a layer (a) which has poly-l-lactic acid as the primary component and contains an impact modifier in the range of 0.1 to 10 mass % and a layer (b) which has poly-d-lactic acid as the primary component and contains an impact modifier in the range of 0.1 to 10 mass %..
A School Corporation Kansai University


Miniature ultrasonic imaging system


An ultrasonic imaging apparatus having a micro-machined ultrasonic transducer (mut), such as a piezoelectric mut (pmut) or capacitive mut (cmut), with a transmitting mode and a receiving mode for generating and sensing acoustic pressure in imaging applications. During transmission in a pmut the inverse piezoelectric effect on the piezo layer causes transverse stress, which causes a bending moment in the pmut structure leading to out-of-plane deflection.
The Regents Of The University Of California


Splitter


In a splitter, a first duplexer including a first transmit filter and a first receive filter at a first antenna terminal and a second duplexer including a second transmit filter and a second receive filter at a second antenna terminal are connected to each other. A second transmit band of the second transmit filter and a second receive band of the second receive filter are positioned in a frequency range between a first transmit band of the first transmit filter and a first receive band of the first receive filter.
Murata Manufacturing Co., Ltd.


Surface elastic wave device comprising a single-crystal piezoelectric film and a crystalline substrate with low visoelastic coefficients


A surface elastic wave device comprises a stack including: a thin film made of a piezoelectric first material; a substrate made from a second material; and exciting means for generating at least one surface acoustic wave propagation mode in the piezoelectric film; wherein: the first material is a single-crystal material and the second material is a crystalline material, the thickness of the thin film of piezoelectric first material being smaller than or equal to 20 μm, and the first material and the second material having viscoelastic coefficients lower than or equal to those of quartz for the propagation mode induced by the exciting means.. .
Commissariat A L'energie Atomique Et Aux Energies Alternatives


Piezoelectric drive device and robot


A piezoelectric drive device includes multiple piezoelectric drive units that have a contact portion which can come into contact with a driven portion, and that have a piezoelectric substance. The number of the multiple piezoelectric drive units is 10 or more, an overall output from the multiple piezoelectric drive units is 0.3 w or greater, and a weight of the piezoelectric drive unit is 1 μg to 5 g..
Seiko Epson Corporation


Piezoelectric wafer, piezoelectric vibration piece, and piezoelectric vibrator


This piezoelectric wafer has: a piezoelectric vibration piece; a frame portion that supports the piezoelectric vibration piece; and a coupling portion that couples the piezoelectric vibration piece to the frame portion. The piezoelectric vibration piece is broken off at the coupling portion and separated from the piezoelectric wafer.
Daishinku Corporation


Piezoelectric resonator element, piezoelectric device using the piezoelectric resonator element, producing the piezoelectric resonator element, and producing the piezoelectric device using the piezoelectric resonator element


A crystal resonator element 2 has excitation electrodes 23a, 23b formed on front and back main surfaces of a crystal resonator plate. Each of the excitation electrodes is made of a ternary alloy containing silver as a major component, a first additive, and a second additive.
Daishinku Corporation


Ultrasonic transducer and manufacture method thereof


The present application relates to the technical field of transducer, it provides an ultrasonic transducer and the manufacture method therefore. The ultrasonic transducer comprises: a piezoelectric layer for radiating sound signal forward or backward, each side thereof being plated with an electrode; a matching layer arranged in the front of the piezoelectric layer and suitable for sending the forward sound signal; a tuning layer arranged on the back of the piezoelectric layer, wherein the piezoelectric layer is disposed between the tuning layer and the matching layer; a backing layer for absorbing the backward sound signal from the piezoelectric layer, wherein the backing layer is arranged against the piezoelectric layer on the tuning layer..
Edan Instruments, Inc.


Surface treatment of semiconductor substrate using free radical state fluorine particles


A substrate having a buffer layer and a barrier layer is formed. The buffer and barrier layers have different bandgaps such that an electrically conductive channel comprising a two-dimensional charge carrier gas arises at an interface between the buffer and barrier layers due to piezoelectric effects.
Infineon Technologies Austria Ag


Semiconductor device


Provided is a semiconductor device. The semiconductor device includes a substrate including a cantilever configured to generate a flow of cooling media through dynamic movement, an active area on the substrate which an electronic device is provided on, an insulation layer disposed to be spaced apart from the active area on the substrate, a lower electrode on the insulation layer, a piezoelectric film on the lower electrode, and an upper electrode on the piezoelectric film..
Electronics And Telecommunications Research Institute


Methods and multi-touch tactile touch panel actuator mechanisms


A method and apparatus of actuator mechanisms for a multi-touch tactile touch panel are disclosed. The tactile touch panel includes an electrical insulated layer and a tactile layer.
Immersion Corporation


Method for evaluating atomic vacancy in surface layer of silicon wafer and evaluating the same


A method for evaluating atomic vacancies in a silicon wafer surface layer includes: element formation in which a pair of comb-shaped electrodes are formed on the same surface of a silicon sample over piezoelectric thin films; detection during which the sample is cooled and an ultrasonic pulse generated from one electrode while an external magnetic field is applied, the ultrasonic pulse being propagated through the sample surface and received by the other electrode, and a phase difference being detected between the ultrasonic pulse generated by the one electrode and the ultrasonic pulse received by the other electrode; and evaluation during which the sample surface elastic constant is determined on the basis of the phase difference, and the atomic vacancies in the sample surface are evaluated on the basis of changes in the elastic constant according to temperature or changes in the elastic constant according to the magnetic field intensity.. .
Niigata University


Self-powered tactile pressure sensors


In one embodiment, a self-powered tactile pressure sensor includes a flexible substrate, an array of piezoelectric crystalline nanorods each having a bottom end and a top end, the nanorods being generally perpendicular to the substrate, a top electrode that is electrically coupled to the top ends of the nanorods, and a bottom electrode that is electrically coupled to the bottom ends of the nanorods.. .
Board Of Regents, The University Of Texas System


Icing condition detection method


A method for detecting an icing condition using an apparatus comprising a piezoelectric material and a vibration detector. The piezoelectric material has a surface proximate to a surface of a vehicle.
The Boeing Company


Tire producing electrical power


The present application relates to a tire (2) comprising a tread portion (4) and sidewalls (6) terminating with beads, with inner sides defining an annular cavity; a deformable structure (8) located in the annular cavity in contact with the inner side of the tread portion (4), said structure (8) comprising bendable elements (10); wherein the bendable elements (10) of the deformable structure (8) comprise a piezoelectric material (102) so as to produce electrical energy from bending of said elements (10) and comprise at least one thermoelectric material (101, 103) so as to produce electrical energy from heat of said elements.. .
The Goodyear Tire & Rubber Company


Liquid ejecting head


A liquid ejecting head includes a piezoelectric element that is disposed on a flow passage formation substrate, and discharges liquid from nozzle openings through the nozzle openings by pressurizing the liquid which fills the inside of a pressure generating chamber due to the displacement of a vibration film according to driving of the piezoelectric element, the piezoelectric element includes an insulating film formed on the vibration film, a first electrode film formed on the insulating film, a piezoelectric layer formed on the first electrode film, and a second electrode film formed on the piezoelectric layer, and the insulating film includes a lower insulating film formed on the vibration film and an upper insulating film which is formed on the lower insulating film with the same material as that of the lower insulating film, but has a different crystal structure.. .
Seiko Epson Corporation


System of detection and transmission of ultrasonic machining


A system of detection and transmission of ultrasonic machining incorporating a motor, an ultrasonic horn and a cutting tool mainly includes a detector, a vibrator and a transmitter. The vibrator is made of piezoelectric material and is used to create ultrasonic vibrations, and the detector made of piezoelectric material is used to physically detect the vibrations.
Chung-yuan Christian University


Interface apparatus of transmission


An interface apparatus of transmission which can be installed in an ultrasonic vibration machining apparatus which includes a cutting tool and a piezoelectric vibration apparatus includes a fixed ring, a plurality of rotary bearing objects and a rotary ring. The fixed ring is used to connect the piezoelectric vibration apparatus and remains in a fixed state.
Chung-yuan Christian University


Piezoelectric harvesting system using repulsion force


A piezoelectric harvesting system using repulsion force, according to one embodiment of the present invention, comprises: a piezoelectric body comprising a piezoelectric material; a fixed portion to at least one surface of which the piezoelectric body is adhered; a support portion for supporting one side of the fixed portion; and a repulsion force-providing portion for providing repulsion force to the fixed portion, so that the piezoelectric body generates electric energy when the fixed portion is deformed due to application of external force and then recovered. According to one embodiment of the present invention, additional shock is applied to the fixed portion to which the piezoelectric body is adhered when recovering after being deformed, thereby increasing the amount of electric energy generated due to the deformation of the piezoelectric body..
Amc Energy Co., Ltd.


Process for making lead zirconate titanate (pzt) layers and/or platinum electrodes and products thereof


A method of making a piezoelectric device comprising providing a deposition chamber, the deposition chamber having reduced pressure therein; loading a substrate into the deposition chamber; sputter depositing hexagonal 001 oriented titanium on the substrate; providing an oxygen anneal to convert 001 oriented titanium into 100 oriented rutile tio2; sputter depositing a 111 or 100 oriented textured conducting material for use as an electrode; sputter depositing a hexagonal 001 oriented titanium and providing an oxygen anneal in a lead oxide environment to convert 001 oriented titanium into 100 oriented rutile tio2 or pbxti1-xo3; sputter depositing textured lead zirconate titanate pbzrxti1-x03 having an 001 orientation as a piezoelectric layer, and sputter depositing a textured electrode on top of the textured lead zirconate titanate; whereby processing of the layers within the deposition chamber provides minimized exposure to ambient contamination and improved texturing in the resulting films.. .
U.s. Army Research Laboratory Attn: Rdrl-loc-i


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Piezoelectric thin film, manufacturing method therefor, and piezoelectric element


A piezoelectric thin film composed of aluminum nitride and which contains magnesium and 31 to 120 atomic percent of niobium relative to 100 atomic percent of the magnesium, and the total content of the magnesium and the niobium relative to the total sum of contents of the magnesium, the niobium and the aluminum nitride falls within the range of 10 to 67 atomic percent.. .
National Institute Of Advanced Industrial Science And Technology


Bistable piezoelectric cantilever vibration energy generator based on spherical composite structure and partial separation of different layers


Implementations herein relate to a bistable piezoelectric cantilever vibration energy generator based on spherical composite structure with partial separation of different layers that includes a beam bracket and a shell. The shell is spherical, the bottom of the shell has a circular opening.
Beijing University Of Technology


Piezoelectric ceramic plate, plate-shaped substrate and electronic component


A piezoelectric ceramic plate which is slightly deformed by firing, includes a plate-shaped substrate, and an electronic component. The piezoelectric ceramic plate has a pair of main surfaces, a pair of opposing first side surfaces, and a pair of opposing second side surfaces.
Kyocera Corporation


Drive control objective lens and fluorescence microscope system


Provided is a driving control method of an objective lens in which an optical-axis chromatic aberration can be corrected by driving the objective lens, and an image can be quickly captured by realizing a quick driving and stabilizing of the objective lens so as to acquire a three-dimensional image at a high speed. A driving control method of the objective lens driven by a piezoelectric actuator provided in a fluorescence microscope includes a first step of applying a pulse voltage larger than a displacement voltage making the objective lens move to a focal position of an observation target to the piezoelectric actuator for a predetermined time so as to move the objective lens near the focal position, and a second step of applying the displacement voltage to the piezoelectric actuator after the first step to stabilize the objective lens..
Riken


Sensor capable of sensing pressure by means of the deformation of a wrinkled piezoelectric layer


A pressure-sensitive sensor including a substrate supporting a piezoelectric layer of a piezoelectric material. The piezoelectric layer includes surface undulations as wrinkles on which pressure is exerted upon use of the sensor.
Commissariat A L'energie Atomique Et Aux Energies Alternatives


Temperature sensor using piezoelectric resonator and methods of measuring temperature


A method of measuring temperature includes positioning a piezoelectric resonator in an environment exhibiting the temperature to be measured, applying an input signal to the piezoelectric resonator to resonate the piezoelectric resonator, varying a frequency of the input signal over a range of input frequencies, determining the resonance frequency of the piezoelectric resonator, and determining the temperature of the environment by referencing the resonance frequency of the piezoelectric resonator. The resonance frequency of the piezoelectric resonator changes according to a change in the temperature of the environment and the resonance frequency of the piezoelectric resonator corresponds to the temperature of the environment..
California Institute Of Technology


Injection valve and operation of an injection valve


The present disclosure relates to an injection valve comprising an injector body, a needle body, a control space, a control valve, and a piezoelectric actuator. The injector body has a recess and a fluid inflow and a fluid outflow.
Continental Automotive Gmbh


Piezoelectric device, inkjet head, inkjet printer, and manufacturing piezoelectric device


An actuator as a piezoelectric device has a bonding layer including titanium, a lower electrode including platinum, a piezoelectric thin film, and an upper electrode formed in this order on a substrate. Ti particles precipitate from the bonding layer onto the lower electrode.
Konica Minolta, Inc.


Device generating sound


In the present invention, a device is provided with a main surface member, a piezoelectric body plate, a first support part, and a housing. The main surface member is used as a vibration plate.
Sharp Kabushiki Kaisha


Acoustic wave device and acuoustic wave module


An acoustic wave device of the present invention has a piezoelectric substrate, an excitation electrode arranged on the piezoelectric substrate, an electrode pad arranged on the piezoelectric substrate and electrically connected to the excitation electrode, and a cover arranged on the piezoelectric substrate so that a oscillation space is arranged between the cover and the excitation electrode. The cover has inside it a via conductor electrically connected to the electrode pad and is curved so that its surface facing the piezoelectric substrate approaches the excitation electrode side with respect to an upper surface of the piezoelectric substrate from a position of contact with the via conductor..
Kyocera Corporation


Acoustic wave device


An acoustic wave device includes: a support substrate; a piezoelectric substrate bonded to the support substrate; a first acoustic wave element formed on the piezoelectric substrate; a frame formed on the support substrate to surround the first acoustic wave element; and a substrate formed on the frame so that a cavity to which the first acoustic wave element is exposed is formed above the piezoelectric substrate, wherein a difference in linear expansion coefficient between the support substrate and the substrate in a first direction in a surface direction of the piezoelectric substrate is less than a difference in linear expansion coefficient between the support substrate and the piezoelectric substrate in the first direction, and the piezoelectric substrate remains in a region where the first acoustic wave element is formed and is removed in a region where the frame is formed.. .
Taiyo Yuden Co., Ltd.


Method and identifying discharge failure of a piezoelectric circuitry


The present disclosure discloses a method and apparatus for identifying discharge failure of a piezoelectric circuitry. The apparatus comprises a piezoelectric circuitry consisting of charging and discharging circuit with a microcontroller to compute the time required to charge and discharge the piezoelectric element respectively.
Hcl Technologies Limited


Self-limited crack etch to prevent device shorting


A semiconductor device includes a piezoelectric layer interposed between a first metal layer and a hardmask layer. A first trench extends through the hardmask layer, the piezoelectric layer and the first metal layer.
International Business Machines Corporation


Method of fabricating a base plate for piezo actuation


A method of fabricating a base plate for piezoelectric actuation, comprises providing a plate having a major surface, striking a first removable portion of the plate in a first direction substantially normal to the major surface to shear the first removable portion relative to the plate by a shear distance that is less than the plate thickness. Striking the first removable portion in a second direction substantially opposite the first direction to reduce the shear distance by a reduction in shear that is less than the plate thickness.
Intri-plex Technologies, Inc.


Piezoelectric device


A piezoelectric device including a substrate, at least two electrodes extending on the substrate, at least one piezoelectric strip extending on the substrate and on the electrodes, and at least one electrically-conductive strip extending at least on one of the electrodes and on the piezoelectric strip and in contact with the substrate on either side of the piezoelectric strip.. .
Commissariat à I'Énergie Atomique Et Aux Énergies Alternatives


Piezoelectric devices and methods for their preparation and use


Methods for fabricating a piezoelectric device are provided. The methods can include providing a substrate and forming a nanocrystalline diamond layer on a first surface of the substrate.
Indian Institute Of Technology Madras


Tactile sensation providing apparatus and control tactile sensation providing apparatus


A tactile sensation providing apparatus includes a piezoelectric element 1, a detection unit 7 for detecting each pressing and releasing based on an output voltage of the piezoelectric element 1, a drive unit 4 for driving the piezoelectric element 1 synchronously with the detection of each pressing and releasing by the detection unit 7 and thereby providing a tactile sensation, a discharge unit 5 for discharging the piezoelectric element 1 after the driving of the piezoelectric element 1 before start of detection of next releasing or pressing, and a voltage fixing unit 11 for fixing, after the detection of the pressing or releasing by the detection unit 7 before the start of the detection of the next pressing or releasing, an input voltage of the detection unit 7 at a predetermined voltage.. .
Kyocera Corporation


Piezoelectric sensor assembly for wrist based wearable virtual keyboard


In one example a holder for a piezoelectric sensor comprises a body comprising a first surface and a second surface, opposite the first surface and a recess formed in the first surface of the body to receive the piezoelectric sensor. Other examples may be described..
Intel Corporation


Vacuum cell-assembly device, cell-assembly method and manufacturing device


A vacuum cell-assembly device, for cell-assembly of an upper substrate and a lower substrate of a display panel, includes an upper machine table, a lower machine table, a control circuit and a dynamic sensing and regulating structure. The dynamic sensing and regulating structure is fixed on the upper machine table and comprises a plurality of sub-structures.
Boe Technology Group Co., Ltd.)


Actuation and sensing platform for sensor calibration and vibration isolation


A micro-system with integrated multi-axis actuation and sensing capabilities for in-situ calibration of long-term scale-factor drifts in the output signal of attached or monolithically integrated inertial sensors. The micro-system comprises a piezoelectric actuator, integrated position sensors, and a controller.
The Regents Of The University Of Michigan


Cylindrical resonator gyroscope


A quartz vibratory gyroscope comprises a substrate, a quartz cylindrical ring having one end connected to the substrate and an opposite open end, and a radial surface lined with an electrically conductive material, and a pair (or more) of electrodes arranged adjacent opposite sections of the electrically conductive material to electrically induce resonance at the open end of the quartz cylindrical ring, such as by electrostatic actuation or piezoelectric actuation. The same or additional electrode pairs may be used for rotational sensing, such as by capacitive sensing or by piezoelectric sensing..

A flow control valve and a mass flow controller using the same


Thereby, a flow control valve which can effectively intercept a transmission of heat using a simpler and compacter structure than a flow control valve according to a conventional technology so that the temperature of a laminated piezoelectric actuator does not exceed its heat-resistant temperature even when it is used for high-temperature process gas is provided.. .

Piezoelectric injector for direct fuel injection


A piezo injector for direct fuel injection may comprise an injector body, an actuator unit having a piezoelectric actuator with a head plate and a base plate, a hydraulic coupler having a coupler piston, a coupler cylinder, and a coupler spring, and a nozzle unit having a nozzle needle arranged in a nozzle body. The piezoelectric actuator is surrounded by a corrugated tube braced between the head plate and the base plate such that the piezoelectric actuator has a preload imparted to it.
Continental Automotive Gmbh


Liquid discharge manufacturing the same


A liquid discharge apparatus is provided, including a liquid discharge head including: an upper substrate, a plurality of piezoelectric elements, an intermediate substrate, a lower substrate and a plurality of individual traces arranged on the upper substrate and extending toward the contacts arranged on the one end side in the second direction from the plurality of piezoelectric elements respectively.. .
Brother Kogyo Kabushiki Kaisha


Liquid discharge producing piezoelectric actuator


A liquid discharge apparatus is provided, which comprises a channel substrate formed with a plurality of first and second pressure chambers disposed in a first direction, a plurality of first and second individual electrodes, a piezoelectric film, a common electrode, and first traces. The first traces are connected to exposed portions of the first individual electrodes exposed from the piezoelectric film, and each of the first traces passes from the exposed portion between the two second individual electrodes to extend to the one side in the second direction.
Brother Kogyo Kabushiki Kaisha


Liquid discharging apparatus and control liquid discharging apparatus


A liquid discharging apparatus includes a housing, a head unit that is provided in the housing, and includes a discharge section, which is provided with a piezoelectric element that is displaced depending on a driving signal, a driving signal creation section that creates the driving signal, a temperature information creation section that creates temperature information, which shows a temperature of a predetermined location inside the housing, a detection signal creation section that creates a detection signal by amplifying a residual vibration signal, which shows residual vibrations that occur in the discharge section after the piezoelectric element is displaced depending on the driving signal, with an amplification factor that depends on a temperature, which the temperature information shows, and a discharge state determination section that determines a discharge state of the liquid in the discharge section on the basis of the detection signal.. .
Seiko Epson Corporation


Driving circuit for driving a capacitive load


Provided is a liquid discharging apparatus which includes a modulation circuit which generates a modulation signal which is obtained by pulse-modulating a source signal, a transistor which generates an amplified modulation signal by amplifying the modulation signal, a low pass filter which includes an inductor and a capacitor and generates a drive signal by smoothening the amplified modulation signal, a piezoelectric element which is displaced by receiving the drive signal, a cavity of which the internal volume changes in accordance with the displacement of the piezoelectric element, a nozzle through which liquid in the cavity is discharged in accordance with change in the internal volume of the cavity, and a circuit substrate on which the modulation circuit, the transistor, and the low pass filter are mounted, in which the capacitor is a leadless type capacitor.. .
Seiko Epson Corporation


Drive circuit for driving a capacitive load


A liquid discharge apparatus includes: a modulation circuit that generates a modulated signal by pulse-modulating a source signal; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that returns the drive signal to the modulation circuit; a circuit board; a piezoelectric element that is displaced by application of the drive signal thereto. The circuit board has a first mounting surface and a second mounting surface.
Seiko Epson Corporation


Electronic device


An electronic device 1 includes: a panel 10; a housing 60 holding the panel 10; and a piezoelectric element 30 attached to the panel 10, wherein the deformation of the piezoelectric element 30 causes the panel 10 to vibrate, to transmit human body vibration sound to an object in contact with the panel 10, and the perpendicular line or normal to the main surface of the panel 10 and the surface of the piezoelectric element 30 attached to the panel 10 are not orthogonal to each other.. .
Kyocera Corporation


Drive circuit for driving a capacitive load


A liquid discharge apparatus includes: an modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that allows the drive signal to return to the modulation circuit; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. In this configuration, a self-resonant frequency of the capacitor is higher than a frequency of the self-oscillation..
Seiko Epson Corporation


Lifting system, electrical testing, vibration damper, and machine assembly


The invention relates to a lifting system, comprising a piezoelectric actuator, a support, and a hydraulic stroke multiplier having an input and an output side, wherein with the input side of the hydraulic stroke multiplier said hydraulic stroke multiplier is tied to the piezoelectric actuator, and with the output side of the hydraulic stroke multiplier said hydraulic stroke multiplier is tied to the support. In the method for electrically testing an electronic component, the component is placed on the support of such a lifting system, and is lifted for positioning relative to a test contact.
Siemens Aktiengesellschaft


Piezoelectric drive device, robot, and drive method thereof


A piezoelectric drive device includes a vibrating plate and multiple piezoelectric drive units that are disposed in the vibrating plate, and that respectively have a contact portion which can come into contact with a driven body.. .
Seiko Epson Corporation


Piezoelectric thin film stack


The present disclosure is drawn to a piezoelectric thin film stack and method of preparing the same. The piezoelectric thin film stack can comprise a substrate with an oxide application surface, a metal oxide adhesive blend layer applied to the oxide application surface, and a piezoelectric film applied directly to the metal oxide adhesive blend layer..
The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Orego


Piezoelectric element and manufacturing piezoelectric element


Provided are a piezoelectric element having high stability, which operates with high efficiency, and a method for manufacturing the piezoelectric element. The piezoelectric element (10) has a laminate structure in which a first electrode (14), a first piezoelectric film (16), a second electrode (18), an adhesion layer (20), an interlayer (22), a third electrode (24), a second piezoelectric film (26), and a fourth electrode (28) are laminated in this order on a silicon substrate (12).
Fujifilm Corporation


Nebulizing driving apparatus and nebulizing system


A nebulizing driving apparatus is used to drive a piezoelectric material of a nebulizing module. The nebulizing driving apparatus includes a driving circuit, a control circuit and a feedback circuit.
Delta Electronics, Inc.


Piezoelectric thin-film based flexible sensing device, fabrication thereof and operating the same


A sensing device, a method for fabrication thereof, and a method for operating the same are disclosed. The sensing device includes a flexible substrate, a first metallisation layer, a piezoelectric thin film layer, a second metallisation layer, and an insulating layer.
Masdar Institute Of Science And Technology


Apparatus including optical deflector controlled by saw-tooth voltage and its controlling method


An optical deflector includes a mirror; a piezoelectric actuator adapted to rock the mirror around an axis of the mirror; and a piezoelectric sensor adapted to sense vibrations of the piezoelectric actuator. A control unit includes: a saw-tooth voltage generating block adapted to generate a saw-tooth voltage; an integral block adapted to calculate an integral voltage of a sum of a sense voltage of the piezoelectric sensor and a dc offset characteristic voltage; a dc offset characteristic voltage calculating block adapted to calculate the dc offset characteristic voltage in accordance with the integral voltage; a subtracter block adapted to generate a deviation between the saw-tooth voltage and the integral voltage; and a controller adapted to generate a drive voltage in accordance with the deviation to apply the drive voltage to the piezoelectric actuator..
Stanley Electric Co., Ltd.


Pressure-sensing device and pressure-sensing touch panel


A pressure-sensing device including a pressed component that has a contact surface to which pressure is applied by contact from a presser; a polymeric piezoelectric element that is disposed at an opposite side from the contact surface of the pressed component and that has a piezoelectric constant d14 of 1 pc/n or more as measured at 25° c. Using a stress-charge method; a curable resin layer that includes at least one selected from the group consisting of cold-setting resins, thermosetting resins, and actinic radiation-curable resins and that is in contact with at least part of a surface of the polymeric piezoelectric element; and an electrode that is in contact with at least part of a surface of the polymeric piezoelectric element or of a surface of the curable resin layer..
Murata Manufacturing Co., Ltd




Piezoelectric topics:
  • Piezoelectric
  • Piezoresistive Material
  • Wave Device
  • Acoustic Wave
  • Electronic Device
  • Attenuation
  • Control Unit


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