EP3010656A1 - Procédé pour le contact électrique d'une piézocéramique - Google Patents

Procédé pour le contact électrique d'une piézocéramique

Info

Publication number
EP3010656A1
EP3010656A1 EP14728127.3A EP14728127A EP3010656A1 EP 3010656 A1 EP3010656 A1 EP 3010656A1 EP 14728127 A EP14728127 A EP 14728127A EP 3010656 A1 EP3010656 A1 EP 3010656A1
Authority
EP
European Patent Office
Prior art keywords
piezoceramic
electrically conductive
flexible
conductive film
composite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14728127.3A
Other languages
German (de)
English (en)
Inventor
Guenter Gerlach
Andre Gerlach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3010656A1 publication Critical patent/EP3010656A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/06—Forming electrodes or interconnections, e.g. leads or terminals

Definitions

  • the invention relates to a method for electrically contacting a piezoceramic.
  • the invention also relates to a sound transducer with a correspondingly contacted
  • Piezoceramic and an ultrasonic array with such transducers are Piezoceramic and an ultrasonic array with such transducers.
  • ultrasonic parking systems are based on ultrasonic sensors, which operate in the transceiver mode and are distributed in the rear and / or front bumper integrated. In this case, four to six such sensors are arranged and vertically aligned front and rear, so that the individual sound fields cover the entire space in front of and behind the vehicle and no ground reflections are detected. Such systems have a significant warning function when an object is detected in the sound space.
  • array sensors that include a matrix or line with multiple ultrasonic sensors.
  • the piezoceramic is attached to a front end side of the diaphragm pot. Furthermore, the piezoceramic is connected via at least two lines with signal connection points of the printed circuit board, wherein the signal connection points are provided on a portion of the printed circuit board in the interior of the diaphragm pot.
  • the cables themselves are designed as wires or single core stranded cables.
  • a method for electrically contacting a piezoceramic comprising the following steps: a) providing the piezoceramic with electrodes for electrically contacting the
  • Piezoceramic and a flexible, electrically conductive film b) forming a composite by the flexible, electrically conductive film is at least partially applied to an electrode of the piezoceramic; c) forming a permanent, electrically conductive connection between the flexible, electrically conductive film and the electrode of the piezoceramic.
  • inventive method a stable and robust contacting the piezoceramic.
  • a reliable contact can be provided, which increases the life and reliability of systems in which such a contacted piezoceramic is used.
  • the process is simple and reliable to carry out.
  • a cost effective method is provided which achieves high process reliability and is suitable for high-volume production.
  • the inventive method is particularly suitable for the production of
  • Sound transducers such as ultrasonic transducers, the sound waves over the piezoceramic in a
  • the method according to the invention is particularly suitable for producing thickness vibrators or bending vibrators.
  • the piezoceramic can first be contacted according to the method according to the invention and then introduced into a transducer element.
  • the piezoceramic can be introduced into the transducer element and then contacted. Also possible are combinations of these method steps in which the piezoceramic is partially contacted, then introduced into the transducer element and then the further contacting of the
  • Piezoceramic is performed.
  • the transducer element can be adapted to the design of the sound transducer.
  • the transducer element of a bending oscillator is designed as a converter pot, on the bottom of which the piezoceramic is introduced.
  • the transducer element comprises two transducer bodies, between which the piezoceramic is introduced.
  • a piezoceramic refers to a ceramic material which deforms under the action of an external force, for example by ultrasonic waves, and results in a charge separation from this deformation. Piezoceramics are based on
  • the piezoceramic is formed flat, d. H. the aspect ratio between length or width and thickness is at least 2, preferably 8-40, particularly preferably 20.
  • the piezoceramic may have any geometric shapes. For example, it may be round, rectangular, elliptical or square.
  • the flexible film comprises a carrier film, an adhesive layer and an electrically conductive layer, it can be between 20 ⁇ and 250 ⁇ , preferably between 30 ⁇ and 230 ⁇ and more preferably between 40 ⁇ and 90 ⁇ thick. Furthermore, the film can be temperature-resistant up to a temperature of preferably 250 ° C.
  • the flexible film may comprise a plastic film as a base film based on a polyimide or PET or PEN. Such polyimide films are available, for example, under the name Kapton®.
  • the flexible film In order to make the flexible film electrically conductive, it can be coated on one or two sides with an electrically conductive material.
  • the coating can be applied uniformly on the flexible film or printed in printed conductors.
  • a coating material a metal such as copper, gold, aluminum or
  • Gold alloys are used.
  • the flexible film By coating the flexible film with an electrically conductive material contacting surfaces are formed on the flexible film, which can preferably be brought directly into contact with the electrodes of the piezoceramic.
  • the ground entry of the contacting by the flexible, electrically conductive film is minimal.
  • the vibration characteristics remain essentially unaffected.
  • the solder paste may contain a solder metal powder, for example based on copper, tin, silver or mixtures thereof, and a flux.
  • conductive adhesive anisotropic or isotropic conductive adhesive can be used. anisotropic
  • Conductive adhesives contain, for example, an epoxy resin in which 10 to 20 wt .-% based on the epoxy resin may be contained on metallic balls. Such balls may have a size of 5 ⁇ to 50 ⁇ , preferably from 8 ⁇ to 25 ⁇ . Isotropic conductive adhesive can also be formed on the basis of an epoxy resin, in the metallic platelets with a length or width of 30 ⁇ to 70 ⁇ and an aspect ratio to the thickness of 5, also possible isotropic conductive adhesive with metal balls, wherein the proportion of metal in wt. % greater than anisotropic conductive adhesives is, for example, in the range of 20 to 7% by weight. As the metal for the balls or the plates, for example, silver or aluminum or a composite of a metal with an outer nickel layer or only nickel is suitable.
  • thermode at least one
  • Thermodynamic head comprising at least one contact surface, which introduces heat and / or pressure in the composite.
  • the thermal head can comprise a plurality of contact surfaces in a specific geometry.
  • the thermal head can have round, rectangular, elliptical or square contact surfaces or contact surfaces
  • the thermal head comprises a heater for introducing heat into the composite and a rear spring for applying pressure in the form of contact pressure.
  • a heater for introducing heat into the composite
  • a rear spring for applying pressure in the form of contact pressure.
  • Each contact surface of the thermal head can be individually spring-loaded in order to achieve a suitable tolerance compensation.
  • Thermode makes it possible to provide a fully automated process that can be easily adapted to different requirements.
  • individual sound transducers can be produced just as easily with the aid of a suitably designed thermo head, such as sound transducer arrays in which a plurality of sound transducers can be arranged in a matrix.
  • the Kunststofftechnik a low-resistance contact, through which compared to thermocompression welding a low heat input is necessary and a depolarization of the piezoceramic can be prevented.
  • thermode may comprise a plurality of thermo-heads which are controlled jointly or individually. Thereby, a sequential or parallel operation can be realized. In sequential operation, several
  • thermo-heads can be controlled simultaneously. That's it
  • thermo-heads with different forms of contact surfaces can be structurally combined. This makes it possible to contact different 1 D or 2D array layouts in just one step. It is still possible, a
  • thermode may comprise a plurality of thermo-heads, which may be further back-springed several times to form a one- or two-dimensional geometric arrangement of a plurality of contacted piezoceramics or transducer elements. This can be done in one step. Alternatively, the formation of the transducer assembly can be done sequentially with just a feathered thermal head. This can also be the geometric
  • the thermal head with subgroups can also be arranged several times, so that the entire layout of the piezoceramics to be contacted or the transducer elements can be cured in one step.
  • the contact surfaces of the thermal head can be designed both symmetrically and not symmetrically.
  • the contact surfaces can in this case have any shapes or be divided.
  • the contact surface is heated to the melting temperature of the solder, for example 240 ° C, and then brought into contact with the composite and pressed.
  • the contact surface of the thermal head can be made smaller compared to the contact surface for conductive adhesive.
  • anisotropic conductive adhesive is used with spheres, when the composite is heated, vertical electrical conductivity is created when the composite is pressed until the spheres press into the metallic upper and lower contact partners.
  • the contact surface is heated to temperatures up to 250 ° C, preferably 190 ° C, and is thus well below half the Curie temperature of typical piezoceramics to avoid depolarization.
  • isotropic conductive adhesives in addition to the vertical electrical conductivity between the electrode of the piezoceramic and the flexible, eclectic conductive foil to a vertical and horizontal line. Compared to anisotropic conductive adhesives, it may therefore be in the border area between
  • Piezo ceramics of the array come to short circuits.
  • the introduction of heat into the composite takes place by the thermo head or the thermo heads are controlled to a temperature that the
  • Processing temperature of the solder paste or the hardening temperature of the conductive adhesive corresponds.
  • the application of pressure to the composite can be controlled by the thermodynamic head is brought into contact with the composite and is pressed over a spring characteristic until the desired contact pressure is reached.
  • the contact pressure can be chosen so that when placing the thermal head on the composite no surface forces act to prevent the breakage of the ceramic.
  • the thermo head In the pressed position, the thermo head can dwell for a holding time, the
  • thermo head can be relaxed and brought to the starting position.
  • the thermode head can act on the composite of piezoceramic and flexible, electrically conductive film for between 5 and 30 seconds with a contact pressure in the range of 1 to 2 N / mm 2 .
  • the curing time is small under the action of the contact pressure and high volume production can be achieved within a very short time for mass production.
  • the flexible, electrically conductive film after forming the permanent, electrically conductive connection between the flexible, electrically conductive film and an electrode of the piezoceramic or after contacting the
  • Piezoceramic connected to an electrical assembly.
  • the flexible, conductive film is thus connected at one end to the piezoceramic and connected at the other end to the electrical assembly.
  • the electrical assembly can be used for controlling and measuring signals of the piezoceramic. So can the electric
  • Assembly components in particular electronic components, have, which are mounted on the flexible, electrically conductive foil, a flexible printed circuit board or a rigid printed circuit board.
  • the flexible, electrically conductive foil in the region of the electrical assembly can have a thickness of 40 ⁇ m to 400 ⁇ m.
  • the flexible printed circuit board may have the same flexible, electrically conductive foil as the flexible, electrically conductive foil for contacting and be reinforced in the region of the components.
  • the flexible, electrically conductive film may be reinforced at the end contacting the circuit board.
  • this part of the flexible, electrically conductive film for example stretchable with an electronic component, such as an SMD (Surface-Mounted Device) -Buchsenance, can be connected.
  • SMD Surface-Mounted Device
  • the flexible, electrically conductive foil or the flexible printed circuit board For contacting the components of the electrical assembly tracks are provided on the flexible, electrically conductive foil or the flexible printed circuit board. Furthermore, the electrical assembly with the flexible, electrically conductive film can be formed in one piece or in two parts. In the two-part embodiment, the contacting between the flexible, electrically conductive film and the electrical assembly, for example, with a conductive adhesive or a solder paste, as described above, take place. Furthermore, the flexible, electrically conductive foil and the electrical
  • Assembly be designed in different forms and be adapted accordingly to different applications.
  • a cost-effective overall system for contacting the piezoceramic can be provided, which is "quasi" made of one piece and thus enables a robust contacting.
  • a sound transducer in particular an ultrasonic transducer, which comprises a piezoceramic, which is connected via a flexible, electrically conductive foil with an electrical assembly.
  • the sound transducer is produced by the method described above.
  • the additional mass input of the contacting can be minimized.
  • the contact thus influences the vibration characteristics of the transducer only minimally and unwanted side effects due to the contact can be avoided.
  • the sound transducer can be configured as a bending oscillator or as a thickness oscillator.
  • the contacting can via the backside electrode of the
  • Piezoceramic made with a metallic transducer pot, a metallic mass or a metallized plastic component. Furthermore, the contacting of the
  • Front side electrode and / or the re-contacted backside electrode of the piezoceramic done by the flexible, electrically conductive film.
  • re-contacting is understood here that the one of two electrodes of the piezoelectric element, which is not accessible, guided on the piezoelectric element by an applied, electrically conductive path to the accessible side and expanded at the end suitable for contacting.
  • a sound transducer array in particular a
  • Ultrasonic transducer array comprising a plurality of the above-described sound transducer.
  • the transducer array may be a 1D or 2D array, i. the individual sound transducers can be arranged in a matrix with one or more rows.
  • the individual sound transducer elements of the array can be arranged symmetrically or asymmetrically.
  • FIG. 1 shows a device for contacting a piezoceramic and a
  • Figures 2a, 2b, 2c exemplary embodiments for contact surfaces of a
  • Thermodenkopfes, 3a, 3b an embodiment of a bending oscillator with a piezoceramic, which is contacted with a flexible film,
  • Figure 4 shows another embodiment of a bending oscillator
  • Piezoceramic which is contacted with a flexible film
  • FIG. 5 shows an embodiment of a thickness oscillator whose piezoceramic is contacted with a flexible film
  • Figure 6 shows another embodiment of a thickness vibrator with a
  • Piezoceramic which is contacted with a flexible film
  • Figure 8 shows a further embodiment of a thickness vibrator
  • Piezoceramic which is contacted with a flexible film.
  • FIG. 1 shows by way of example a device 10 for contacting an electrode 40, 42 of a piezoceramic 14 with an electrically conductive, flexible film 16.
  • the device 10 includes a thermode 18 having a thermode head 20.
  • the thermo-head 20 is followed by a transmission unit 22, which has a heater 24 and a prestressed compression spring 26.
  • the transfer unit 22 is guided by a securing element 28 in a guide device 30. In this way, by the guide means 30 and the transfer unit 22 pressure on the heated thermal head 20 are transmitted.
  • the guide device 30 is movably mounted in the vertical 32.
  • a metallic transducer element 36 here a metallic transducer pot
  • a conductive adhesive 38 such as an anisotropic or an isotropic conductive adhesive, applied by means of dispensers and the
  • Piezoceramic 14 placed by means of, for example, a vacuum gripper. As a result, after curing of the composite, an electrically conductive connection between the
  • Transducer element 36 and the rear electrode 40 of the piezoceramic 14 produced.
  • a layer of conductive adhesive 44 is applied to the front-side electrode 42 of the piezoceramic 14.
  • the flexible, electrically conductive film 16 which comprises, for example, a copper-coated polyimide film, is placed on this conductive adhesive layer 44 with the aid of a vacuum gripper.
  • the composite 46 of transducer element 36, piezoceramic 14 and flexible, electrically conductive film 16 is formed so far that a permanent, electrically conductive connection between the individual components can be formed.
  • the guide device 30 is controlled such that a contact between the thermo-head 20 and the composite 46 with transducer element 36, flexible, electrically conductive foil 16 and piezoceramic 14 is produced.
  • the thermo-head 20 and the composite 46 with transducer element 36, flexible, electrically conductive foil 16 and piezoceramic 14 is produced.
  • Guiding device 30 by means of a linear adjuster or a spindle drive.
  • the guide means 30 are first moved into contact with the composite 46, wherein the reheated thermal head 20 in a further method of
  • Composite 46 exercises and via the heat conduction of the heat input to the conductive adhesive 38, 44 takes place. Accordingly, the thermo-head 20 can be timed into position so that the conductive adhesive 38, 44 cured in the composite 46 and thus a permanent, electrically conductive connection between the components 36, 14, 16 of the composite 46 is formed.
  • FIGS. 2a, 2b and 2c show different embodiments of a
  • Thermodenkopfes 20 in plan view which can be used for example in the device 10 of Figure 1.
  • FIG. 2 a shows, by way of example, a thermode head 20 with a single contact surface 48, which implements a transducer structure with a rectangular base area.
  • FIGS. 2b and 2c three rectangular contact surfaces 48 are formed, with which three converter assemblies can be contacted simultaneously. In such a
  • Embodiment with multiple contact surfaces 48 is a regular arrangement, as shown in Figure 2b, or an irregular arrangement, as shown in Figure 2c possible.
  • the curing of multiple transducer assemblies at the same time is particularly advantageous in forming one-dimensional or two-dimensional transducer arrays.
  • thermode head shapes shown in FIG. 2 may also have any other geometric shapes.
  • the contact surfaces 48 of the thermal head 20 may be round, angular, elliptical or other shapes or combinations of these geometric shapes exhibit.
  • the contact surfaces 48 may be divided uniformly or non-uniformly, which is particularly advantageous when, for example, round or rectangular, re-contacted piezoceramics are to be contacted.
  • thermode heads 20 When hardening the composite 46 with the device 10 according to FIG. 1, it is thus possible to use different thermode heads 20, which make it possible to contact an entire 1D or 2D array layout for a transducer array in one work step.
  • similar thermo-heads 20 can be summarized at a slightly greater distance from each other, the entire head can sit in a station.
  • a plurality of individual sound transducers can be produced in parallel, ie simultaneously. If a top head 20 is used with several parallel contact surfaces 48 for the simultaneous contacting of a plurality of individual transducers of a transducer array, it may still be useful depending on the tolerance of the transducer array to individually spring-back the contact surfaces 48 and so to achieve a suitable tolerance compensation.
  • thermode heads 20 Another possibility is to sequentially use one or more thermode heads 20.
  • the holding plate 34 can be moved via linear and rotary tables and the corresponding layout part of the transducer array can be positioned to the respective thermode head 20.
  • this increases the cycle time, there is more flexibility in the layout of the array with only one or two thermal heads.
  • FIG. 3 a shows a bending oscillator 50 with a transducer element 36 and a
  • Piezoceramic 14 which is contacted by a flexible, electrically conductive film 16.
  • the bending oscillator 50 of FIG. 3 a has a transducer element 36, which is designed cup-shaped with side walls 54 and a pot base 56. In the interior of the pot adjacent to the bottom of the pot 56, a piezoceramic 14 is provided, which is the
  • the piezoceramic 14 electrodes 40, 42 which are connected by the flexible, electrically conductive film 16 with an electrical assembly 52.
  • the electrical assembly 52 includes elements to receive the signals of the piezoceramic 14 and to drive the piezoceramic 14 for emitting sound waves. Furthermore, the
  • Elements of the electrical assembly 52 provided on a flexible, electrically conductive film, which corresponds to the flexible, electrically conductive film 16 of the contact or running as a rigid board and connected to the electrically conductive flex foil.
  • Figure 3b shows such a further construction of a bending oscillator 50 with a
  • Piezoceramic 14 which is connected via a flexible, electrically conductive film 16 with a circuit board 52.
  • Figure 4 shows another embodiment of a bending oscillator 50 with a
  • Piezoceramic 14 which is contacted via a flexible, electrically conductive film 16.
  • the back side electrode 40 of the piezoceramic 14 and the lateral surface 54 of the transducer element 36 are contacted with the flexible, electrically conductive foil 16.
  • the transducer element 36 is electrically conductive and conducts the
  • both electrical connection points on the piezoceramic are each contacted with a conductor of the flex foil.
  • FIG. 5 shows a thickness oscillator 58 with a piezoceramic 14, which is contacted via a flexible, electrically conductive foil 16.
  • This includes for transmitting vibrations of the plates 64, a front body 60 and a rear body 62, between which a piezoceramic 14 is provided.
  • the contacting takes place on the outer end sides 66 of the front body 60 and the rear body 62, which point away from the piezoceramic 14.
  • Both the front and the rear body 60, 62 are electrically conductive and direct the contacting of the flexible, electrically conductive film 16 on the piezoceramic 14 and the electrodes 40, 42.
  • the flexible, electrically conductive film 16 may thus be an electrically conductive connection between the piezoceramic 14 and its electrodes 40, 42 and an electrical assembly 52 manufacture.
  • FIG. 6 shows a further embodiment of a thickness vibrator 58 and its contacting.
  • the thickness oscillator 58 of FIG. 6 has a contacting on the end faces 68 of the front and rear bodies 60, 62, which adjoin the piezoceramic 14.
  • the flexible, electrically conductive film 16 can thus produce an electrically conductive connection between the piezoceramic 14 or its electrodes 40, 42 and an electrical assembly 52.
  • FIG. 7 shows a further embodiment of a thickness oscillator 58 which is contacted with a flexible, electrically conductive foil 16.
  • the flexible, electrically conductive film 16 is further electrically conductively connected to the electrodes of the piezoceramic 14.
  • the front and rear bodies 60, 62 are likewise electrically conductive and conduct the contacting to the piezoceramic 14 or its electrodes 40, 42.
  • one of the flexible, conductive foils 16 contacts the electrode 40 of the piezoceramic 14 and the front body 60, whereas the other flexible film 16 only the piezoceramic 14 contacted. These two contacts can be continued to an electrical assembly 52.
  • FIG. 8 shows a further embodiment of a thickness vibrator 58, which is contacted with a flexible, electrically conductive foil 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

L'invention concerne un procédé pour le contact électrique d'une piézocéramique (14), comprenant les étapes suivantes : a) mise à disposition de la piézocéramique (14) avec des électrodes (40, 42) pour le contact électrique de la piézocéramique (14) et d'une feuille souple électroconductible (16) ; b) réalisation d'un assemblage (46) en ce que la feuille souple électroconductible (14) est appliquée au moins partiellement sur une électrode de la piézocéramique (14) ; c) réalisation d'une liaison durable, électroconductrice entre la feuille souple, électroconductible (16) et l'électrode (40, 42) de la piézocéramique (14). L'invention concerne en outre un transducteur de son (14) ainsi qu'un groupe de transducteurs de son fabriqué à l'aide du procédé pour le contact électrique d'une piézocéramique (14).
EP14728127.3A 2013-06-20 2014-05-26 Procédé pour le contact électrique d'une piézocéramique Withdrawn EP3010656A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211596.2A DE102013211596A1 (de) 2013-06-20 2013-06-20 Verfahren zum elektrischen Kontaktieren einer Piezokeramik
PCT/EP2014/060765 WO2014202336A1 (fr) 2013-06-20 2014-05-26 Procédé pour le contact électrique d'une piézocéramique

Publications (1)

Publication Number Publication Date
EP3010656A1 true EP3010656A1 (fr) 2016-04-27

Family

ID=50884884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14728127.3A Withdrawn EP3010656A1 (fr) 2013-06-20 2014-05-26 Procédé pour le contact électrique d'une piézocéramique

Country Status (5)

Country Link
US (1) US10074797B2 (fr)
EP (1) EP3010656A1 (fr)
CN (1) CN105339098B (fr)
DE (1) DE102013211596A1 (fr)
WO (1) WO2014202336A1 (fr)

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WO2016008525A1 (fr) * 2014-07-16 2016-01-21 Siemens Aktiengesellschaft Composant de connecteur électrique sous-marin
DE102015106484A1 (de) * 2015-04-28 2016-11-03 Valeo Schalter Und Sensoren Gmbh Verfahren und Vorrichtung zum Herstellen eines Ultraschallsensors für ein Kraftfahrzeug
CN106442734B (zh) * 2016-09-29 2024-06-18 中国人民解放军92228部队 一种小型不规则铸件声谱无损检测装置及检测方法
CN109935223B (zh) * 2017-12-19 2021-04-20 北京长城电子装备有限责任公司 一种超小尺寸低频发射换能器
DE102018109319B4 (de) * 2018-04-19 2022-09-22 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug, Kraftfahrzeug und Verfahren zum Herstellen eines Ultraschallsensors
CN109142931B (zh) * 2018-09-03 2021-11-23 苏州华兴源创科技股份有限公司 一种用于压电陶瓷测试的系统及方法
DE102019111742A1 (de) * 2019-05-07 2020-11-12 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor-Baugruppe, Ultraschallsensorvorrichtung und Verfahren zur Herstellung einer Ultraschallsensor-Baugruppe
DE102020216448A1 (de) 2020-12-22 2021-10-28 Carl Zeiss Smt Gmbh Optisches system, lithographieanlage und verfahren zum herstellen eines optischen systems
JP2022117116A (ja) * 2021-01-29 2022-08-10 株式会社ディスコ 剥離装置
DE102023200233A1 (de) 2023-01-12 2024-07-18 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Ausbildung einer stoffschlüssigen Verbindung

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US20160141488A1 (en) 2016-05-19
CN105339098B (zh) 2019-01-15
WO2014202336A1 (fr) 2014-12-24
CN105339098A (zh) 2016-02-17
US10074797B2 (en) 2018-09-11

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