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Piezo patents

      

This page is updated frequently with new Piezo-related patent applications.




 Electronic component-use package and piezoelectric device patent thumbnailElectronic component-use package and piezoelectric device
An electronic component-use package includes a base that holds an electronic component element, and terminal electrodes formed on a bottom surface of the base. The terminal electrodes have chamfered parts facing corner parts of the base bottom surface and having angles of chamfer ranging in ±10 degrees to a reference line.
Daishinku Corporation


 One-port surface elastic wave resonator on high permittivity substrate patent thumbnailOne-port surface elastic wave resonator on high permittivity substrate
A surface elastic wave resonator comprises a piezoelectric material to propagate the surface elastic waves and a transducer inserted between a pair of reflectors comprising combs of interdigitated electrodes and having a number nc of electrodes connected to a hot spot and an acoustic aperture w wherein the relative permittivity of the piezoelectric material is greater than about 15, a product of nc·w/fa for the transducer being greater than 100 μm·mhz−1, where fa is the antiresonance frequency of the resonator. A circuit comprises a load impedance and a resonator according to the invention and having an electrical response manifesting as a peak in the coefficient of reflection s11 at a frequency of a minimum value of the parameter s11 that is lower than −10 db, the antiresonance peak of the resonator being matched to the impedance of the load..
Senseor


 Piezoelectric thin film resonator, filter, and duplexer patent thumbnailPiezoelectric thin film resonator, filter, and duplexer
A piezoelectric thin film resonator includes: a substrate; a piezoelectric film located on the substrate and having a poisson's ratio of 0.33 or less; a lower electrode and an upper electrode facing each other across the piezoelectric film; and an insertion film that is located in the piezoelectric film or on a lower surface or an upper surface of the piezoelectric film in an outer peripheral region within a resonance region, in which the lower electrode and the upper electrode face each other across the piezoelectric film, and is not located in a center region of the resonance region, wherein at least one of the lower electrode, the piezoelectric film, and the upper electrode in the outer peripheral region within the resonance region is thinner than the at least one of the lower electrode, the piezoelectric film, and the upper electrode in the center region of the resonance region.. .
Taiyo Yuden Co., Ltd.


 Stealth-dicing compatible devices and methods to prevent acoustic backside reflections on acoustic wave devices patent thumbnailStealth-dicing compatible devices and methods to prevent acoustic backside reflections on acoustic wave devices
Stealth-dicing-compatible devices and methods to prevent acoustic backside reflections on acoustic wave devices are disclosed. An acoustic wave device comprises a substrate having opposing top and bottom surfaces, where a first portion of the bottom surface has a higher roughness than a second portion of the bottom surface, and an acoustic resonator over the top surface of the substrate.
Rf Micro Devices, Inc.


 Bulk acoustic wave (baw) device having roughened bottom side patent thumbnailBulk acoustic wave (baw) device having roughened bottom side
A bulk acoustic wave (baw) resonator includes a substrate having a top side surface and a bottom side surface. A bragg mirror is on the top side surface of the substrate.
Texas Instruments Incorporated


 Acoustic wave device and module patent thumbnailAcoustic wave device and module
An acoustic wave device includes: a support substrate; a piezoelectric substrate bonded on an upper surface of the support substrate at room temperature and made of a different material from the support substrate; a comb-shaped electrode formed on an upper surface of the piezoelectric substrate and exciting an acoustic wave; and an amorphous layer formed between the support substrate and the piezoelectric substrate.. .
Taiyo Yuden Co., Ltd.


 Bonded wafers and surface acoustic wave devices using same patent thumbnailBonded wafers and surface acoustic wave devices using same
A bonded wafer with low carrier lifetime in silicon comprises a silicon substrate having opposing top and bottom surfaces, the structure of the silicon in a top portion of the silicon substrate having been modified to reduce the carrier lifetime in the top portion relative to the carrier lifetime in portions of the silicon substrate other than the top portion; a piezoelectric layer bonded over the top surface of the silicon substrate and having opposing top and bottom surfaces separated by a distance t; and a pair of electrodes having fingers that are inter-digitally dispersed on the top surface of the piezoelectric layer in a pattern having a center-to-center distance d between adjacent fingers of the same electrode, the electrodes comprising a portion of a surface acoustic wave (saw) device. Modification of the top portion of the silicon substrate prevents the creation of a parasitic conductance within the top portion of the silicon substrate during operation of the saw device..
Rf Micro Devices, Inc.


 Methods for fabrication of bonded wafers and surface acoustic wave devices using same patent thumbnailMethods for fabrication of bonded wafers and surface acoustic wave devices using same
A method of fabricating a bonded wafer with low carrier lifetime in silicon comprises providing a silicon substrate having opposing top and bottom surfaces, modifying a top portion of the silicon substrate to reduce carrier lifetime in the top portion relative to the carrier lifetime in portions of the silicon substrate other than the top portion, bonding a piezoelectric layer having opposing top and bottom surfaces separated by a distance t over the top surface of the silicon substrate, and providing a pair of electrodes having fingers that are inter-digitally dispersed on a top surface of the piezoelectric layer, the electrodes comprising a portion of a surface acoustic wave (saw) device. The modifying and bonding steps may be performed in any order.
Rf Micro Devices, Inc.


 Device for harvesting energy from a fluidic flow including a thin film of piezoelectric material patent thumbnailDevice for harvesting energy from a fluidic flow including a thin film of piezoelectric material
A transmission belt is described which comprises a body made of a first elastomeric material, a plurality of teeth and a plurality of longitudinal cords buried in the body of the belt and a back. The belt has a working surface on said teeth and the working surface is at least partially covered by a covering made of a plastic and/or metal material.
Fondazione Istituto Italiano Di Tecnologia


 Connector for needle with piezoelectric polymer sensors patent thumbnailConnector for needle with piezoelectric polymer sensors
A connector includes an inner conductive body (34) for connecting to a sensor contact on a medical device. An insulator (40) is formed on the inner conductive body.
Koninklijke Philips N.v.


Bimorph-type piezoelectric film

The first piezoelectric film and the second piezoelectric film each having a total light transmittance of 90% or more, and a total haze value of 8.0% or less.. .

Button device using piezoelectric element

A button device includes a piezoelectric element which includes a piezoelectric body with one surface on which a first external electrode and a second external electrode are formed and a plate with one surface attached to the other surface of the piezoelectric body, a supporting plate disposed on the one surface of the piezoelectric body, a cover disposed on the other surface of the plate, a first spacer provided between an edge portion of the one surface of the plate and the supporting plate, a second spacer provided between at least a part of an edge portion of the other surface of the plate and the cover to provide a separation space between the plate and the cover, and a dot provided in the separation space to transfer an external force to the piezoelectric element or to transfer a vibration of the piezoelectric element to the cover.. .
Wisol Co., Ltd.

Microelectromechanical generating a physical effect

A microelectromechanical apparatus for generating a physical effect, including an array of moving elements, each coupled to a mechanical support by at least one flexure which is associated with at least one piezoelectric member which is operable to be strained by an electrical field applied to the piezoelectric member, thereby flexing the flexure to which the piezoelectric member is coupled; an electrical wiring, including a group of electrodes, wherein each electrode out of the group of electrodes is coupled to at least one of the piezoelectric members; wherein the electrical wiring is operable to concurrently transfer different sequences of electric fields to different piezoelectric members, thereby controllably inducing movement of moving elements of the array for creating the physical effect; and a motion restriction mechanism for maintaining a maximal motion distance for each of the moving elements when actuated via the corresponding flexure and piezoelectric member.. .
Audio Pixels Ltd.

Method and a merged power-communication cable in door security environment

A method controlling access to a door using a merged power-communication cable. An access controlled door lock in door is operated using merged power-communication cable.

Hermetically sealed hydrophones with very low acceleration sensitivity

An improved hydrophone is presented that has extremely low acceleration sensitivity, hermetic sealing, and is self-shielded. The hydrophone can also contain an integral amplifier and pressure/depth limiting switch.

Wireless piezoelectric accelerometer and system

Wireless piezoelectric accelerometers and systems are provided. A wireless piezoelectric accelerometer may comprise a piezoelectric sensing element configured to sense mechanical acceleration and produce an electrical charge signal in response of the sensed mechanical acceleration, a signal processing module (spm) configured to convert the electrical charge signal into a voltage signal, and process and digitize the voltage signal, and a wireless module configured to modulate and transmit the digitized voltage signal as wireless signals.
Agency For Science, Technology And Research

Piezoelectric pressure sensor

A piezoelectric pressure sensor includes a sensor housing that accommodates a membrane, a piezoelectric sensor, a charge pick-off and a pre-stressing assembly. The membrane captures a pressure profile, and polarization charges are generated accordingly on the piezoelectric sensor by the captured pressure profile.
Kistler Holding Ag

Piezoelectric pressure sensor and process of manufacturing same

A piezoelectric pressure sensor includes a membrane for detecting a pressure profile, a piezoelectric sensor on which polarization charges are produced by the detected pressure profile, an electrode arrangement receiving and transmitting the generated polarization charges as signals via a charge output. The sensor further includes an electrical connecting element and an electrical signal conductor.
Kistler Holding Ag

Piezoelectric pressure sensor

A piezoelectric pressure sensor includes a sensor housing enclosing a membrane, a piezoelectric sensor, an electrode arrangement and a pre-stressing body. The membrane captures a pressure profile causing polarization charges generated on the piezoelectric sensor.
Kistler Holding Ag

Pinch valve

The present invention relates to pinch valves and in particular to such pinch valves controlled with a piezoelectric linear actuator assembly for controlling the flow through a flexible tube disposed within a pinch valve body by controlling the position of a plunger relative to a flexible tube at a control point along the length of said tube.. .
I.p.u. Industries Ltd

Vehicle braking systems and methods

A method in which at least one piezoceramic sensor, which converts every mechanical force to which it is subjected into an electrical signal and having a curie temperature higher than 200° c., is solidarized directly onto the surface of a metal support element of a vehicle braking element, which during use faces a vehicle element to be braked. While in contact with such a surface, an electrical circuit is implemented that picks up and eventually processes the electrical signal, the electrical circuit being connected with a connector integrated with the metal support element.
Itt Italia S.r.l.

Power generation system

A power generation system to improve the degree of freedom of installation is described herein. A power generation system comprises: first fluid chambers that contain a fluid; a second fluid chamber that contains the fluid; a communication flow channel that communicates the first fluid chambers and the second fluid chamber with each other; first pistons that are disposed such that the fluid in the first fluid chambers can be pressed; a second piston that is disposed such that the fluid in the second fluid chamber can be pressed; and power generation modules that convert pressing forces of the corresponding first pistons into electricity using piezoelectric elements.
Soundpower Corporation

Transducer including fibers and outputting and inputting an electric signal

A transducer in the form of cloth having high flexibility obtained by manufacturing a conventional woven or knitted fabric structure using general-purpose fiber materials. The transducer includes piezoelectric units, each including two conductive fibers and one piezoelectric fiber arranged substantially on the same plane in the order of the conductive fiber, the piezoelectric fiber and the conductive fiber, and outputs and inputs an electric signal..
Kansai University

Electronic vehicle horn

An electronic vehicle horn outputs a warning sound by exciting a diaphragm using a piezoelectric device that is driven with a composite signal generated, in part, by modulating a first fundamental square wave with a first modulating square wave and setting a frequency deviation at the time of the modulation in a predetermined range, modulating a second fundamental square wave with a second modulating square wave and setting a frequency deviation at the time of the modulation in a predetermined range, and generating the composite signal by mixing the modulated first fundamental square wave and the modulated second fundamental square wave.. .
Shuchitatsugiken Co.,ltd.

Liquid discharging apparatus

A liquid discharging apparatus is provided with a liquid discharging section that discharges a liquid onto a medium, and a transport section that transports the medium, and a piezoelectric film sensor is provided in the liquid discharging section. Due to a liquid discharging apparatus having such a configuration, it is possible to suppress a circumstance in which at least one of the medium and the liquid discharging section become damaged due to contact between the medium and the liquid discharging section..
Seiko Epson Corporation

Actuator, ink-jet head, and ink-jet device

An actuator includes a piezoelectric layer, a vibration plate, and a reduction inhibition layer. The piezoelectric layer includes an oxide material.
Panasonic Intellectual Property Management Co., Ltd.

Piezoelectric device, liquid ejecting head and manufacturing piezoelectric device

A piezoelectric device includes a first substrate having a piezoelectric element on one surface thereof and a second substrate having penetration wiring that includes a through hole formed in a thickness direction thereof and a conductor section formed in the through hole. A resin section is formed on a surface of one substrate of one of the first substrate and the second substrate, which opposes the other substrate, and is formed of an elastic body in a shape protruding toward the other substrate, and a first electrode layer is formed on the surface of the other substrate side of the resin section.
Seiko Epson Corporation

Liquid ejecting device, head unit, and liquid ejecting method

A liquid ejecting device includes: a piezoelectric element that is deformed by applying at least one drive waveform among a plurality of drive waveforms to the piezoelectric element, the plurality of drive waveforms including a first drive waveform and a second drive waveform; a cavity that is filled with a liquid and is increased or decreased in internal pressure due to deformation of the piezoelectric element; a nozzle that communicates with the cavity, and ejects the liquid as a liquid droplet; and a selection section that selects at least one drive waveform from the plurality of drive waveforms, the liquid droplet including a first liquid droplet ejected when the first drive waveform has been selected, and a second liquid droplet ejected when the second drive waveform has been selected, an ejection volume of the first liquid droplet being almost equal to an ejection volume of the second liquid droplet.. .
Screen Holdings Co., Ltd.

Vibration device

A vibration device that includes an elastic plate having a first elastic plate section, a second elastic plate section opposing the first elastic plate section, and a curvature joining section connecting the first and second elastic plate sections; a piezoelectric vibration element is provided on a surface of the first elastic plate section; and a circuit is provided on the second elastic plate section. A mass addition member is attached to a leading end portion of the first elastic plate section, and the elastic plate is accommodated in a package member..
Murata Manufacturing Co., Ltd.

Ultrasonic device, piezoelectric device, ultrasonic measurement apparatus, and electronic instrument

An ultrasonic device includes an element substrate provided with an ultrasonic transducer array in which a plurality of ultrasonic transducers are arranged in an array, a sealing plate (array counter plate) that is bonded to the element substrate and covers at least the ultrasonic transducer array, and a support substrate that supports at least one of the element substrate and the sealing plate, and the support substrate has a through hole (insertion section) into which at least part of the sealing plate is inserted.. .
Seiko Epson Corporation



Piezo topics:
  • Piezoelectric
  • Transducer
  • Ultrasonic
  • Electric Actuator
  • Electronic Device
  • Electronic Apparatus
  • Damping Force
  • Radial Flow
  • Semiconductor Material
  • Semiconductor
  • Sound Transducer
  • Ultrasound
  • Synchronous
  • Asynchronous
  • Liquid Adhesive


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    This listing is a sample listing of patent applications related to Piezo for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Piezo with additional patents listed. Browse our RSS directory or Search for other possible listings.


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