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Piezoelectric patents

      

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




 Electro-acoustic conversion film and digital speaker patent thumbnailElectro-acoustic conversion film and digital speaker
Provided is an electro-acoustic conversion film that is suitably used for a digital speaker or the like, and that includes a polymer composite piezoelectric body formed by dispersing piezoelectric particles in a viscoelastic matrix formed of a polymer material having viscoelasticity at room temperature, and thin-film electrodes provided on both surfaces of the polymer composite piezoelectric body, and at least one of the thin-film electrodes is divided into a plurality of regions of which an area increases by 2n times (n is a natural number including 0). Thus, a digital speaker in which reverberation or crosstalk between segments is suppressed is obtained..
Fujifilm Corporation


 Electro-acoustic conversion film and digital speaker patent thumbnailElectro-acoustic conversion film and digital speaker
Provided is an electro-acoustic conversion film that is suitably used for a digital speaker or the like, and that includes a polymer composite piezoelectric body formed by dispersing piezoelectric particles in a viscoelastic matrix formed of a polymer material having viscoelasticity at room temperature, and thin-film electrodes provided on both surfaces of the polymer composite piezoelectric body, in which at least one of the thin-film electrodes is divided into a plurality of regions having the same area, and the respective regions are coupled in parallel and grouped to correspond to a weight of each bit digit of a parallel pcm digital signal. Thus, an electro-acoustic conversion film by which a digital speaker in which reverberation or crosstalk between segments is suppressed is obtained is provided..
Fujifilm Corporation


 Acoustic resonator structure with inclined c-axis piezoelectric bulk and crystalline seed layers patent thumbnailAcoustic resonator structure with inclined c-axis piezoelectric bulk and crystalline seed layers
Systems and methods for growing hexagonal crystal structure piezoelectric material with a c-axis that is tilted (e.g., 25 to 50 degrees) relative to normal of a face of a substrate are provided. A deposition system includes a linear sputtering apparatus, a translatable multi-aperture collimator, and a translatable substrate table arranged to hold multiple substrates, with the substrate table and/or the collimator being electrically biased to a nonzero potential.
Qorvo Us, Inc.


 Piezoelectric vibrator, electronic apparatus, and vehicle patent thumbnailPiezoelectric vibrator, electronic apparatus, and vehicle
A piezoelectric vibrator includes a piezoelectric substrate including a first surface, a second surface that is opposites to the first surface, and a connection part that connects the first surface and the second surface to each other, and a pair of excitation electrodes disposed respectively on the first surface and the second surface. The connection part includes a plurality of protruding parts disposed in an area between the excitation electrode and an outer edge of the piezoelectric substrate.
Seiko Epson Corporation


 Piezoelectric vibrator element, piezoelectric vibrator, electronic apparatus, and vehicle patent thumbnailPiezoelectric vibrator element, piezoelectric vibrator, electronic apparatus, and vehicle
A piezoelectric vibrator element includes a piezoelectric substrate including a vibrating part and a fixation part, a first excitation electrode including a first foundation electrode layer disposed on a first surface of the vibrating part, and a first upper electrode layer disposed on the first foundation electrode layer, and a second excitation electrode including a second foundation electrode layer disposed on a second surface of the vibrating part, opposed to the first surface, and a second upper electrode layer disposed on the second foundation electrode layer, wherein a ratio ta2/t1 between a thickness ta2 of the second upper electrode layer and a thickness t1 of the vibrating part is not lower than 1.4% and not higher than 2.4%.. .
Seiko Epson Corporation


 Methods for producing piezoelectric bulk and crystalline seed layers of different c-axis orientation distributions patent thumbnailMethods for producing piezoelectric bulk and crystalline seed layers of different c-axis orientation distributions
Systems and methods for growing hexagonal crystal structure piezoelectric material with a c-axis that is tilted (e.g., 25 to 50 degrees) relative to normal of a face of a substrate are provided. A deposition system includes a linear sputtering apparatus, a translatable multi-aperture collimator, and a translatable substrate table arranged to hold multiple substrates, with the substrate table and/or the collimator being electrically biased to a nonzero potential.
Qorvo Us, Inc.


 Multi-stage deposition system for growth of inclined c-axis piezoelectric material structures patent thumbnailMulti-stage deposition system for growth of inclined c-axis piezoelectric material structures
Systems and methods for growing hexagonal crystal structure piezoelectric material with a c-axis that is tilted (e.g., 25 to 50 degrees) relative to normal of a face of a substrate are provided. A deposition system includes a linear sputtering apparatus, a translatable multi-aperture collimator, and a translatable substrate table arranged to hold multiple substrates, with the substrate table and/or the collimator being electrically biased to a nonzero potential.
Qorvo Us, Inc.


 Methods for fabricating acoustic structure with inclined c-axis piezoelectric bulk and crystalline seed layers patent thumbnailMethods for fabricating acoustic structure with inclined c-axis piezoelectric bulk and crystalline seed layers
Systems and methods for growing hexagonal crystal structure piezoelectric material with a c-axis that is tilted (e.g., 25 to 50 degrees) relative to normal of a face of a substrate are provided. A deposition system includes a linear sputtering apparatus, a translatable multi-aperture collimator, and a translatable substrate table arranged to hold multiple substrates, with the substrate table and/or the collimator being electrically biased to a nonzero potential.
Qorvo Us, Inc.


 Power generating element patent thumbnailPower generating element
There is provided a power generating element which is capable of converting vibration energy in various directions into electric energy without waste and less likely to be damaged even upon application of excessive vibration. Made available is a main generating structure (mgs) in which a first layer (100), a second layer (200) and a third layer (300) are laminated.
Tri-force Management Corporation


 Peristaltic pump for traction battery thermal management system patent thumbnailPeristaltic pump for traction battery thermal management system
A battery assembly may include an array of battery cells, a conduit system, and an emitter. The conduit system delivers coolant for thermally communicating with the array and defines a channel with a flexible wall having dielectric particles.
Ford Global Technologies, Llc


Composition for forming ce-doped pzt-based piezoelectric film

A composition for forming a ce-doped pzt-based piezoelectric film contains: pzt-based precursors containing metal atoms configuring the composite metal oxides; a diol; and polyvinylpyrrolidone. The pzt-based precursors are contained so that a metal atom ratio (pb:ce:zr:ti) in the composition satisfies (1.00 to 1.28):(0.005 to 0.05):(0.40 to 0.55):(0.60 to 0.45) and the total of zr and ti in a metal atom ratio is 1.
Mitsubishi Materials Corporation

Integrated piezoelectric micromechanical ultrasonic transducer pixel and array

An ultrasonic sensor pixel includes a substrate, a piezoelectric micromechanical ultrasonic transducer (pmut) and a sensor pixel circuit. The pmut includes a piezoelectric layer stack including a piezoelectric layer disposed over a cavity, the cavity being disposed between the piezoelectric layer stack and the substrate, a reference electrode disposed between the piezoelectric layer and the cavity, and one or both of a receive electrode and a transmit electrode disposed on or proximate to a first surface of the piezoelectric layer, the first surface being opposite from the cavity.
Qualcomm Incorporated

Deposition system for growth of inclined c-axis piezoelectric material structures

Systems and methods for growing hexagonal crystal structure piezoelectric material with a c-axis that is tilted (e.g., 25 to 50 degrees) relative to normal of a face of a substrate are provided. A deposition system includes a linear sputtering apparatus, a translatable multi-aperture collimator, and a translatable substrate table arranged to hold multiple substrates, with the substrate table and/or the collimator being electrically biased to a nonzero potential.
Qorvo Us, Inc.

Touch sensor and liquid crystal display including the same

There are provided a touch sensor and a liquid crystal display including the same. A touch sensor includes a plurality of driving electrodes, a plurality of sensing electrodes intersecting the driving electrodes, a plurality of piezoelectric materials disposed between the driving electrodes and the sensing electrodes at intersection points of the driving electrodes and the sensing electrodes, and a touch controller for detecting a touch position and a touch pressure by using sensing signals output from the sensing electrodes..
Samsung Display Co., Ltd.

Sonic sensors and packages

Embodiments relate to integrated sonic sensors having a transmitter, a receiver and driver electronics integrated in a single, functional package. In one embodiment, a piezoelectric signal transmitter, a silicon microphone receiver and a controller/amplifier chip are concomitantly integrated in a semiconductor housing.
Infineon Technologies Ag

Ce-doped pzt-based piezoelectric film

A ce-doped pzt-based piezoelectric film is provided which is formed of ce-doped composite metal oxides represented by a general formula: pbzcexzryti1-yo3. X, y, and z in the general formula satisfy a relationship of 0.005≦x≦0.05, a relationship of 0.40≦y≦0.55, and a relationship of 0.95≦z≦1.15, respectively.
Mitsubishi Materials Corporation

Piezoelectric ceramic making the same piezoelectric element liquid discharge head ultrasonic motor and dust cleaner

A barium titanate piezoelectric ceramic having good piezoelectric properties and mechanical strength and a piezoelectric element that includes the ceramic are provided. A method for making a piezoelectric ceramic includes forming a compact composed of an oxide powder containing barium titanate particles, sintering the compact, and decreasing the temperature of the compact after the sintering.
Canon Kabushiki Kaisha

Liquid ejecting head, and manufacturing liquid ejecting head

A liquid ejecting head includes a first substrate in which a piezoelectric element is provided; and a second substrate on which the first substrate is connected to a first surface, in which the second substrate is provided with a penetration hole, which penetrates through the second substrate in a plate thickness direction, and penetration wiring, which is formed from a conductor that is formed in an inner portion of the penetration hole, the penetration wiring is formed from a first end portion, which is provided on a first surface side, a second end portion, which is provided on a second surface side, which is a surface that is on an opposite side to the first surface, and connection wiring, which connects the first end portion and the second end portion, and a cross-sectional area of the connection wiring in a planar direction of the first surface is smaller than cross-sectional areas of the first end portion and the second end portion in the planar direction.. .
Seiko Epson Corporation

Device using a piezoelectric element and manufacturing the same

An inkjet printing head includes a hydrogen barrier film, covering side surfaces of upper electrodes and piezoelectric films, a portion of an upper surface of each upper electrode, and a portion of an upper surface of a lower electrode, an insulating film, formed above the hydrogen barrier film, upper wiring, formed above the insulating film, connects the upper electrode to a drive circuit, and a lower wiring, formed above the insulating film, connects the lower electrode to the drive circuit. First contact holes, each exposing an upper electrode, and second contact holes, each exposing an extension portion, are formed in the hydrogen barrier film and the insulating film.
Rohm Co., Ltd.

Electronic apparatus

An electronic apparatus is disclosed. An electronic apparatus comprises a cover panel, a display panel, and a piezoelectric vibrator.
Kyocera Corporation

Sound generator

A sound generator includes a housing (20), a piezoelectric vibrator (60) including a piezoelectric element (61), at least a portion of the piezoelectric vibrator (60) protruding from the housing (20), and an anchor (10) applying a load to the piezoelectric vibrator (60). A portion or all of the piezoelectric vibrator (60) withdraws into the housing (20) under a force of a predetermined load or greater.
Kyocera Corporation

Input terminal

A panel of an input terminal that includes a base substrate having a first principal surface and a second principal surface opposing each other; a piezoelectric film having a third principal surface and a fourth principal surface opposing each other and made of a uniaxially stretched polylactic acid; and rigid bodies disposed at end portions of the first principal surface and the second principal surface of the base substrate so as to oppose each other across the base substrate and partially prevent a deformation caused by a twist of the base substrate. First displacement detection electrodes are formed on the first principal surface of the piezoelectric film and divide the first principal surface into four.
Murata Manufacturing Co., Ltd.

Optical scanning actuator and optical scanning apparatus

An optical scanning actuator (1) includes an optical fiber (2) having a tip (2a) supported to allow vibration and includes a piezoelectric element (4) that generates a driving force by expanding and contracting in the direction of the optical axis of the optical fiber (2), the driving force driving the tip (2a) of the optical fiber (2) in a direction perpendicular to the optical axis. The optical scanning actuator (1) has rotational asymmetry or two-fold rotational symmetry about the optical axis of the optical fiber (2), and the resonance direction of the tip (2a) of the optical fiber (2) and the direction of the driving force of the piezoelectric element (4) are substantially parallel..
Olympus Corporation

Piezoelectric ceramics, and piezoelectric element, and electronic equipment containing piezoelectric ceramics

Provided is a lead-free piezoelectric ceramics having enhanced mechanical quality factor (qm) and mechanical strength. The piezoelectric ceramics, includes at least a first crystal grain and a second crystal grain.
Canon Kabushiki Kaisha

Ink-jet head and printer

In accordance with an embodiment, an ink-jet head is provided which comprises a substrate; a piezoelectric body configured to have a plurality of parallel partition walls at the same pitch interval in the nozzle arrangement direction on the substrate and be plurally arranged in a direction orthogonal to the nozzle arrangement direction; a frame body configured to be arranged on the substrate at the outside of the piezoelectric body; and a nozzle plate configured to have a plurality of discharge openings which is formed by shifting by a half pitch in the nozzle arrangement direction in each row of pressure chambers formed with plural rows by the frame body and a plurality of the partition walls and is respectively formed in the orthogonal direction at a pitch identical to the pitch in each the pressure chamber.. .
Toshiba Tec Kabushiki Kaisha

Liquid ejection device

A liquid ejection device, including a piezoelectric transducer including a plurality of pressure chambers; a plurality of partitions dividing the plurality of pressure chambers; and a plurality of electrodes formed in the plurality of pressure chambers, respectively, wherein the plurality of partitions each include a first side wall and a second side wall that is positioned on a back surface side of the first side wall, wherein the first side wall includes a first wall surface positioned in an upper portion thereof, the first side wall being positioned so as to be set back from a second wall surface positioned below the first wall surface, a first electrode is formed on the second wall surface, a second electrode is formed on the second side wall, and a height of an upper end of the second electrode is larger than a height of an upper end of the first electrode.. .
Canon Kabushiki Kaisha

Smart teethbrush

The present invention describes a conformable u-shaped teeth brush device having a conformable shape adjusting u-shaped teethbrush module and one or more individual tooth brushes coupled to the power drive mechanism, each brush having a sensor, piezoelectric crystal and transducer and each tooth brush having a block anchor coupled to the power drive, under smart controls, an electronic control system for sensing individual tooth pressure and controlling motor transmission of vibration to prior positioned brushes, whereby a users unique mouth features can be accounted for by adjusting u-shape distal ends to fit through the users mouth and align with users teeth arch for programmatically brushing more than one tooth simultaneously.. .

Duplexer

At least one of a transmission filter and a reception filter of a duplexer includes a piezoelectric substrate, an elastic wave filter electrode portion on the piezoelectric substrate and including ground terminals to be connected to a ground potential, a support layer provided on the piezoelectric substrate, a cover provided on the support layer to seal a cavity in the support layer, and via hole electrodes penetrating the support layer and the cover and including first and second ends. The ground terminals are commonly connected on the piezoelectric substrate, and the ground terminals are electrically connected to the respective first ends of the plurality of via hole electrodes.
Murata Manufacturing Co., Ltd.

Tcsaw with improved reliability

Embodiments of a surface acoustic wave (saw) device, or filter, and methods of fabrication thereof are disclosed. In some embodiments, the saw filter comprises a piezoelectric substrate and an interdigitated transducer (idt) on a surface of the piezoelectric substrate.
Rf Micro Devices, Inc.

Piezoelectric device and manufacturing piezoelectric device

In a method for manufacturing a piezoelectric device while stably achieving strong bonding, a moisture-absorbing layer is formed on a bonding surface side of a piezoelectric single-crystal substrate. The moisture-absorbing layer is allowed to absorb moisture.
Murata Manufacturing Co., Ltd.

Piezoelectric nanoelectromechanical relays

An apparatus comprises: a body terminal comprising a first body electrode and a second body electrode; a gate terminal comprising a first gate electrode and a second gate electrode; a first actuator between the first body electrode and the first gate electrode, the first actuator comprising a first piezoelectric material; a second actuator between the second body electrode and the second gate electrode, the second actuator comprising a second piezoelectric material; a beam comprising a first end attached to the first actuator, a second end attached to the second actuator, and a suspended section between the first end and the second end; a metal channel attached to the suspended section of the beam; a source terminal extending over the beam; and a drain terminal extending over the beam.. .
Carnegie Mellon University

Piezoelectric film, piezoelectric film element, piezoelectric actuator, piezoelectric sensor, hard-disk drive and ink jet printer head

A piezoelectric film containing (k,na)nbo3 as the main component, wherein, when a surface of the piezoelectric film was observed in a field view within a specified range, a plurality of first crystals and a plurality of second crystals are arranged in the surface of the piezoelectric film, wherein, the first crystal has a slender shape orientating toward the first orientation along the surface, and the second crystal has a slender shape orientating toward the second orientation which crosses with the first orientation along the surface.. .
Tdk Corporation

Piezoelectric device and producing piezoelectric device

A piezoelectric device that prevents defects due to pyroelectric charge without limiting how the piezoelectric device can be used includes a first metal layer located on a bonding surface of a piezoelectric single crystal substrate. A second metal layer is located on a bonding surface of a support substrate.
Murata Manufacturing Co., Ltd.

Piezoelectric device and driving piezoelectric device

A piezoelectric device includes a piezoelectric element including a first electrode, a second electrode, and a piezoelectric layer provided between the first electrode and the second electrode, and a driving system that drives the piezoelectric element by applying voltage to the first electrode and the second electrode, in which the driving system drives the piezoelectric element at a maximum voltage that is lower than a voltage at which a tunnel current or a poole-frenkel current starts to be generated in the piezoelectric element.. .
Seiko Epson Corporation

Touch pad and electronic apparatus using the same, and producing touch pad

A touch pad is provided. The touch pad includes a transparent piezoelectric film layer configured to generate an electrical signal varying according to a touch pressure, and an electrode layer including a plurality of transparent electrodes disposed in a plurality of areas of the transparent piezoelectric film layer and configured to sense a voltage of the electrical signal generated from the plurality of areas..
Samsung Electronics Co., Ltd.

Touch panel

A touch panel that includes a plate member which includes a first principal surface and a second principal surface opposing each other, and is constructed so as to be distorted in response to a force applied to the first principal surface; a main functional unit having piezoelectric voltage detection electrodes disposed on opposed sides of a piezoelectric film and which detect a piezoelectric voltage corresponding to a distortion amount of the piezoelectric film; and an adhesive layer which adheres the plate member and the main functional unit, the adhesive layer being divided into a plurality of areas, and at least two areas have different moduli.. .
Murata Manufacturing Co., Ltd.

Karman vortex flowmeter

There is provided a karman vortex flowmeter including: a body inside which a flow passage and a karman vortex generation column are formed; and a flow rate measurement unit that measures karman vortexes generated by the karman vortex generation column to thereby obtain a flow rate of a fluid, in which the flow rate measurement unit includes: a piezoelectric element; a piezoelectric element holder that is attached to the body so that the piezoelectric element is arranged in a flow passage; and a thin film part that is formed of a material with higher corrosion resistance than an electrode of the piezoelectric element, the piezoelectric element holder houses the piezoelectric element in a state where the piezoelectric element is sandwiched by a pair of plate-shaped parts integrally formed by a resin material, and in which the thin film part is arranged between the plate-shaped parts and the electrode.. .
Surpass Industry Co., Ltd.

Liquid discharging apparatus

There is provided a liquid discharging apparatus including: a substrate formed with a first pressure chamber and two second pressure chambers; a vibration film; a first piezoelectric element; two second piezoelectric elements; a first wire connected to the first piezoelectric element; two second wires connected to the two second piezoelectric elements, respectively; and three contact sections to which the first wire and the two second wires are connected, respectively. The first wire passes between the two second piezoelectric elements and extends toward one of the three contact sections corresponding thereto; and length in the first direction of second active portions in second piezoelectric portions of the two second piezoelectric elements, is shorter than that of a first active portion in a first piezoelectric portion of the first piezoelectric element; and length in the second direction of the second active portion is longer than that of the first active portion..
Brother Kogyo Kabushiki Kaisha

Piezoelectric element, liquid ejecting head, and piezoelectric device

Provided is a piezoelectric element including: a first electrode; a piezoelectric layer which is provided over the first electrode; and a second electrode provided on a side of the piezoelectric layer opposite to the first electrode, in which the second electrode includes a first layer which is provided on the piezoelectric layer side, and a second layer which is provided on a side of the first layer opposite to the piezoelectric layer, and the second layer does not contain platinum and covers an end portion of the first layer.. .
Seiko Epson Corporation

Piezoelectric element, probe, and ultrasonic measurement apparatus

A piezoelectric element which includes a vibrating film, a piezoelectric body disposed on one surface of the vibrating film, and a horizontal electrode structure in which electrodes are disposed at a predetermined gap therebetween on the piezoelectric body. The vibrating film includes a recess portion in a portion corresponding to the predetermined gap in plan view..
Seiko Epson Corporation

Inhalation device

An inhalation device includes a nozzle, a separator, a housing, a battery portion, a circuit board, and a piezoelectric blower. The piezoelectric blower has a suction hole that opens near the center of an upper surface of the piezoelectric blower and a discharge hole that opens at the center of a bottom surface of the piezoelectric blower.
Murata Manufacturing Co., Ltd.

Dual display presentation portable medical ultrasound scanning systems

A portable ultrasound scanning system comprising a hand-held housing, ultrasound electronics of a complete ultrasound scanning system, including a beamformer and an image processing unit, contained within the hand-held housing. A first display comprises a touchscreen on the hand-held housing with a user input interface, at least partially presented on the first display.
Sonoscanner Sarl

Interchangeable probes for portable medical ultrasound scanning systems

A portable ultrasound scanning system for performing a diagnostic ultrasound scanning process of a patient. The system comprises a portable housing containing ultrasound electronics of a complete ultrasound scanning system including a beamformer that regulate and control operation of the scanning system.
Sonoscanner Sarl

Ultrasonic wave-dissipation block and ultrasonic probe having same

The present invention provides an ultrasonic wave-dissipation block and an ultrasonic probe having the same, which reflect and diffract a backward ultrasonic wave progressing toward the rear of piezoelectric ceramics for generating ultrasonic waves, so as to dissipate the ultrasonic wave, thereby improving the absorption performance of the ultrasonic wave, while reducing the weight and size of a part performing the role of absorbing the ultrasonic wave. The ultrasonic wave-dissipation block comprises: a base body in which an accommodation space is formed; and an ultrasonic reflector disposed in the accommodation space of the base body, and reflecting the ultrasonic wave, flowing in from the outside of the base body, in the direction of the inner sides of side walls of the base body..
Humanscan Co.,ltd

Control system with smart devices for hazardous environments

A control system for hazardous environments decreases flame paths, decreases punctures to the control system when installing interfaces, and increases safety. The control system may be characterized as a “one size fits all” controller that is able to automatically recognize a plurality of user interfaces.
Cooper Technologies Company

Mems loudspeaker having an actuator structure and a diaphragm spaced apart therefrom

The invention relates to a mems loudspeaker (1) for generating sound waves in the audible wavelength spectrum, with a carrier substrate (2) that features a sub-strate cavity (6) with two substrate openings (7, 8), which are formed on two opposite sides of the carrier substrate (2), an actuator structure (3), in particular a piezoelectric actuator structure, which is arranged in the area of one of the two substrate openings (7, 8) and is connected to the carrier substrate (2) in its edge area, and a membrane (4) anchored in its edge area, which, by means of the actuator structure (3), can be set into vibration for generating sound waves. In accordance with the invention, in a cross-sectional view of the mems loudspeaker (1), the membrane (4) is spaced at a distance from the actuator structure (3), such that an intermediate cavity (13) is formed between these two.
Usound Gmbh

Sound transducer for insertion in an ear

The invention relates to a sound transducer for producing sound vibrations, which can be inserted in an ear and can be used in particular for an implantable hearing aid. The sound transducer has at least one carrier layer and at least one piezoelectric layer, as a result of which a deflection via a bimorph principle is achieved, or a deflection can be detected by picking up a voltage..
Fraunhofer-gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Longitudinally coupled resonator-type surface acoustic wave filter

A longitudinally coupled resonator-type surface acoustic wave filter includes a low acoustic velocity film and a piezoelectric film stacked over a high acoustic velocity component in which a bulk wave propagates at an acoustic velocity higher than an acoustic velocity of an elastic wave that propagates in the piezoelectric film. Idt electrodes are provided on one surface of the piezoelectric film.
Murata Manufacturing Co., Ltd.

Acoustic resonator structure having an electrode with a cantilevered portion

An acoustic resonator comprises a first electrode and second electrode comprising a plurality of sides. At least one of the sides of the second electrode comprises a cantilevered portion.
Avago Technologies General Ip (singapore) Pte. Ltd

Elastic wave device and manufacturing the same

An elastic wave device includes a piezoelectric substrate, functional electrodes on the piezoelectric substrate, a support layer on the piezoelectric substrate with a frame shape surrounding the functional electrodes, a cover member on the support layer to seal an opening of the support layer, the cover member including a first main surface facing the support layer, and a second main surface opposite to the first main surface. Recesses are located in the cover member and are open to the second main surface.
Murata Manufacturing Co., Ltd.

Control apparatus, control method, and driving vibration-type actuator, and electronic apparatus equipped with vibration-type actuator

A control apparatus capable of improving responsiveness in a minute movement of a vibration-type actuator that has a vibration body (a piezoelectric device and an elastic body) and a driven body that pressure contact with the vibration body. A driving unit moves the driven body by causing a thrust-up vibration in a pressurizing direction and a conveyance vibration in a perpendicular direction in the vibration body by applying alternating voltages to the piezoelectric device.
Canon Kabushiki Kaisha



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


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