WO2024099800A1 - Elektro-akustisches multifunktionsmodul und elektro-akustisches kommunikationssystem - Google Patents
Elektro-akustisches multifunktionsmodul und elektro-akustisches kommunikationssystem Download PDFInfo
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- WO2024099800A1 WO2024099800A1 PCT/EP2023/080072 EP2023080072W WO2024099800A1 WO 2024099800 A1 WO2024099800 A1 WO 2024099800A1 EP 2023080072 W EP2023080072 W EP 2023080072W WO 2024099800 A1 WO2024099800 A1 WO 2024099800A1
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- Prior art keywords
- acoustic
- electro
- multifunctional
- module
- outer side
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W44/00—Electrical arrangements for controlling or matching impedance
- H10W44/20—Electrical arrangements for controlling or matching impedance at high-frequency [HF] or radio frequency [RF]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing ultrasonic, sonic or infrasonic waves
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10083—Electromechanical or electro-acoustic component, e.g. microphone
Definitions
- An electro-acoustic multifunctional module and an electro-acoustic communication system are specified.
- RF connection radio frequency
- RFID tags RFID tags
- NFC tags near-field communication
- the publication WO 2021/197735 Al describes a transmission arrangement with a primary piezoelectric transducer and a secondary piezoelectric transducer, by means of which an acoustic signal can be transmitted through a medium.
- the publication WO 2022/101215 A1 describes a so-called ID tag in which a corresponding transponder chip is attached directly to a piezoelectric transducer.
- To control such piezoelectric transducers specially adapted additional electrical and electronic components must be made available, which must be connected together to form complex, multi-part and cost-intensive circuit arrangements that can only be used individually for the respective intended application.
- At least one task of certain embodiments is to specify an electro-acoustic multifunctional module. At least another task of certain embodiments is to specify an electro-acoustic communication system.
- an electro-acoustic multifunctional module has a module body with a first outer side, on which an electrical interface is provided, and a second outer side, on which an acoustic interface is provided.
- the electro-acoustic multi-function module which is also referred to below as multi-function module or simply as module forms a single, inseparable unit during normal operation and can therefore also be referred to as a monolithic device.
- a module is therefore used to describe a device which, as part of its usual and intended use, is provided and installed as a one-piece component.
- the term module in the present sense therefore does not include devices which are made up of several components which can be connected to one another by a user or which can be easily separated from one another by a user, for example by loosening mechanical connections using conventional tools and by removing soldered connections.
- the module and in particular the module body cannot be disassembled into several parts without causing damage under normal conditions and is therefore referred to here and in the following as being one-piece.
- the one-piece module body can be designed in such a way that it is not possible to non-destructively access those parts of the module in the module body which are not accessible from the outside in the normal, intended state of the module.
- the multifunctional module is designed in such a way that it has several functionalities.
- the several functionalities can in particular include data transmission and energy transmission, whereby the module can be used on a transmitter side and also on a receiver side.
- one or more functionalities of the module can be selected by an external connection of the electrical interface that can be carried out by a user.
- an electro-acoustic communication system for communication through a wall i.e. in particular for acoustic data and/or energy transmission through the wall, has at least two electro-acoustic multifunctional modules.
- the electro-acoustic communication system can also be referred to below as a communication system or simply as a system.
- the communication system can have at least two identical multifunctional modules, each of which has different functionalities that can be selected by different external connections of the respective electrical interface.
- Each of the identical multifunctional modules offers in particular the same collection of different functionalities that are inherently provided and made available.
- the functionality required for the individual multifunctional module, which depends on the desired application, is selected by the external connection.
- the communication system in particular has at least a first electro-acoustic multifunctional module of the at least two electro-acoustic multifunctional modules, which is mounted on a first side of the wall is attached.
- the at least one first multifunctional module with the acoustic interface is attached to the first side of the wall.
- the communication system has at least one further electro-acoustic multifunctional module of the at least two electro-acoustic multifunctional modules, which is attached to a second side of the wall opposite the first side.
- the at least one further multifunctional module with the acoustic interface is attached to the second side of the wall so that the acoustic interfaces face each other.
- the at least one first multifunctional module and the at least one further multifunctional module can particularly preferably be attached directly opposite each other on the wall.
- an acoustic wave generated by the acoustic interface of one multifunctional module can be detected through the wall by the acoustic interface of the other multifunctional module, with the acoustic wave being passed through the wall.
- the communication system thus forms a system that can also be referred to as an ADL (acoustic data link).
- ADL acoustic data link
- Unidirectional or bidirectional communication can be possible here.
- one of the multifunctional modules acts as a transmitter that sends out acoustic waves, while the other of the multifunctional modules acts as a receiver that detects the acoustic waves. This can make it possible, for example, to transfer energy through the wall.
- data can be transmitted to the receiving multifunctional module, for example.
- a multi-function module that receives first can, after detecting corresponding acoustic waves that are intended for energy transmission and/or that represent suitable control signals, generate acoustic waves itself as a response, which are received by the multi-function module that transmits first.
- data can be queried through the wall once or continuously.
- At least one multifunctional module can be connected to electrical and/or electronic components, whereby the respective functionality is selected.
- the multifunctional modules can also be used, for example, to enable communication between the connected components on both sides of the wall.
- a "wall” is generally referred to as a material that conducts acoustic waves.
- the wall can particularly preferably be a metal wall.
- other materials for the wall are also possible that have sufficient structure and strength to conduct acoustic waves.
- they can be glued to the wall with the acoustic interface, for example with an epoxy resin-based adhesive or another adhesive that is not or only slightly elastic when cured.
- mounting can also be carried out using a magnet on a metal wall, for example, whereby the magnet can be glued to the acoustic interface of the multifunctional module.
- a first plurality of electro-acoustic multifunctional modules to be attached to the first side of the wall and a further plurality of multifunctional modules to be attached to the second side of the wall.
- a further multifunctional module can be attached to the second side.
- all multifunctional modules of the communication system are designed in the same way.
- identical multifunctional modules are used on both sides of the wall, so that the multifunctional modules can be used as a universal component on each side of the wall and the communication system can therefore have a simple and cost-effective structure.
- the electro-acoustic multifunctional module and the electro-acoustic communication system can be provided and set up to operate electronic components such as sensors inside or outside a room surrounded by a wall from the other side without cables and to enable an exchange of information and/or energy.
- a corresponding first electronic component for example a sensor
- a further electronic component is connected to the at least one further multifunctional module, which forms a suitable control for the first electronic component.
- the fact that an electronic component is connected to a multifunctional module can particularly preferably mean that the electronic component is mounted directly on the multifunctional module or the multifunctional module is mounted directly on the electronic component.
- a sensor can, for example, be an active sensor, i.e. a sensor with integrated signal processing and particularly preferably also with a digital interface. Such components can only perform their function if they receive at least a small electrical supply, which can be provided by the connected multifunctional module.
- a sensor can be based on MEMS technology (MEMS: microelectromechanical system).
- the acoustic interface of the multifunctional module has a piezoelectric component.
- the piezoelectric component is provided and designed in particular for converting an electrical voltage signal, for example a carrier frequency, into an acoustic wave, particularly preferably with the same signal form, and vice versa.
- the piezoelectric component can thus convert an electrical voltage signal into an acoustic wave, which is then emitted by the piezoelectric component, and conversely convert an acoustic wave incident on the piezoelectric component from outside into an electrical voltage.
- the piezoelectric component is thus an electro-acoustic transducer.
- the piezoelectric component can preferably comprise a lead-free material.
- the piezoelectric component can also comprise PZT (lead zirconate titanate), for example.
- the piezoelectric component is particularly preferably in the form of a circular or polygonal Disk which is applied to the second outer side of the module body.
- a height of the piezoelectric component along the arrangement direction of the piezoelectric component on the module body is less than a width or a diameter of the piezoelectric component in a direction perpendicular to the arrangement direction.
- the piezoelectric component can have electrode layers, for example on at least two areas and preferably on two sides, for example on two opposite sides, which are provided and designed for the electrical connection of the piezoelectric component.
- the piezoelectric component can particularly preferably be designed as a disk with a bottom side facing the module body and an upper side facing away from the module body and opposite the bottom side, with a first electrode layer being applied to the top side and a second electrode layer being applied to the bottom side.
- the first electrode layer can extend over a side edge of the disk to the bottom side, so that electrical contact with the piezoelectric component is only possible from the bottom side.
- the second outer side of the module body has a first surface area.
- the piezoelectric component can occupy a second surface area on the second outer side, which is preferably greater than or equal to 50% or greater than or equal to 60% or greater than or equal to 70% of the first surface area.
- the available space on the second outer side can be used efficiently for the acoustic interface.
- the piezoelectric component is designed as a circular disk formed, the disc can preferably have a diameter which substantially corresponds to a side length of the module body or at least 80% or at least 90% of the side length of the module body.
- a region of the part or the entire part of the second outer side that is free, i.e. not covered, by the piezoelectric component is covered with a protective layer.
- the piezoelectric component itself can be free of the protective layer at least on an upper side facing away from the module body.
- the protective layer can thus surround the piezoelectric component laterally.
- a protective layer can also be applied over the piezoelectric component.
- a protective layer can be applied over the entire second outer side.
- the protective layer can be, for example, a protective varnish, for example based on an epoxy resin.
- the module body is cuboid-shaped or also designed as a cylinder with a round base or as a prism with a polygonal base.
- the module body can have a first main surface, which is formed by the first outer side, and a second main surface, which is formed by the second outer side, which are connected to one another by side surfaces.
- the main surfaces each have a larger surface area than each of the side surfaces. This can also mean that a height of the module body perpendicular to the main surfaces is smaller than the side lengths of the main surfaces.
- the module body is designed as a cuboid with square main surfaces, the side lengths, i.e.
- the multifunctional module can have a volume of greater than or equal to 5 mm3 and less than or equal to 300 mm3 and can therefore be very compact and have a small design.
- the module body has at least two and preferably exactly two printed circuit boards, also referred to as PCBs (printed circuit boards), which are arranged one above the other and connected to one another by means of an intermediate layer.
- the module body can have a first printed circuit board with the first outer side, on which the electrical interface is provided, and a second printed circuit board with the second outer side, on which the acoustic interface is provided.
- the intermediate layer is arranged between the first and second printed circuit boards, so that the first and second printed circuit boards are connected by means of the intermediate layer and the first and second printed circuit boards and the intermediate layer are stacked one above the other in a sandwich-like manner.
- the side of the first printed circuit board facing away from the intermediate layer is preferably the first outer side of the module body, the side of the second printed circuit board facing away from the intermediate layer is preferably the second outer side of the module body.
- the module body can be manufactured in the form of a composite, also referred to as a panel.
- a first circuit board composite is provided, which has a large number of Areas which, after later separation, each form a first circuit board of the module body.
- the areas can be provided with a wiring level, i.e. in particular conductor tracks and assembly areas, and can be equipped with electrical and/or electronic components.
- a material for the intermediate layer in the form of a plastic material such as a resin, for example an epoxy resin has been applied, preferably over a large area
- a second circuit board composite can be applied to the intermediate layer, the second circuit board composite having a plurality of areas which, after later separation, each form a second circuit board of the module body.
- the areas can in particular have electrode structures, which are described further below, which can be formed by metallization.
- the intermediate layer can form a connecting layer for the material-locking connection of the first circuit board to the second circuit board.
- the composite By separation, for example sawing, the composite can be divided into a plurality of module bodies.
- the module body can have traces of the separation process on the side surfaces, for example traces of sawing, grinding and/or polishing processes.
- the assembly of piezoelectric components can be carried out before or after separation.
- electrical vias that protrude through the module body can be produced on the first circuit board assembly after the assembly of the second circuit board assembly.
- the electrical interface has a plurality of electrical connection surfaces, which can also be referred to simply as connection surfaces below.
- the electrical connection surfaces are arranged on the first outer side.
- the connection surfaces can be formed by metallization of the first circuit board.
- the electrical interface can have at least a first connection surface, a second connection surface and a third connection surface.
- the first and second connection surfaces are electrically connected directly to the acoustic interface.
- the acoustic interface can be controlled or read directly from the outside by external contacting of the first and second connection surfaces.
- An electrical via can extend from each of the first and second connection surfaces through the module body to the second outer side.
- a first electrode structure and a second electrode structure can be present on the second outer side.
- the first electrode structure can be electrically connected to the first connection area, for example via an electrical via mentioned above.
- the second electrode structure can be electrically connected to the second connection area, for example via another electrical via mentioned above.
- the first connection area can be electrically connected directly to the first electrode structure and the second connection area can be electrically connected directly to the second electrode structure via the electrical vias.
- the piezoelectric component can be attached to the first and second electrode structure and electrically connected.
- the piezoelectric component can be mounted on the first and second electrode structure soldered on.
- the piezoelectric component can be glued to the first and second electrode structure, for example with an electrically conductive adhesive.
- a first electrode layer of the piezoelectric component can be attached to the first electrode structure.
- a second electrode layer of the piezoelectric component can be attached to the second electrode structure.
- the first and second electrode structures can each have a grid structure and thus not be formed over the entire surface of areas of the second outer side. This allows good freedom of movement and, at the same time, reliable attachment of the piezoelectric component to the second outer side.
- connection surface on the first outer side can be electrically connected to a wiring level on an inner side of the first circuit board opposite the first outer side.
- a wiring level in the form of conductor tracks and contact points can be formed on the inner side of the first circuit board opposite the first outer side and thus facing the intermediate layer.
- further connection surfaces on the first outer side can be electrically connected to the wiring level.
- the first connection surface can also be electrically connected to the wiring level.
- electrical vias can be provided to connect connection surfaces to the wiring level, which extend from the first outer side to the inner side through the first circuit board.
- the contact points of the wiring level can be designed and configured so that one or more electrical and/or electronic components can be mounted on them.
- a semiconductor chip in the form of a near-field communication transponder chip can be mounted on the wiring level, i.e. in particular on contact points of the wiring level.
- the semiconductor chip can have contact points that are soldered onto the contact areas or glued on in an electrically conductive manner.
- the semiconductor chip can be intended and configured to provide at least one or more of the following functionalities: energy harvesting, I 2 C interface, memory management, encryption.
- the first connection surface can be connected to the third connection surface via an inductor.
- the inductor can be mounted on contact points provided for this purpose and wired via conductor tracks.
- further connection surfaces and/or contact points can be connected to one another via further electrical or electronic components such as resistors, inductors and capacitors.
- the electro-acoustic multifunctional module described here can form a subassembly of the communication system in the form of a monolithic component with an electrical interface and an acoustic interface.
- the acoustic interface can particularly preferably be formed by the piezoelectric component in the form of a piezoelectric transducer, which is suitably acoustically coupled to one side of a wall, for example by gluing as described above.
- the electrical interface can particularly preferably be formed by the electrical connection surfaces, which are in the form of so-called pads on a electrically insulating material, in particular a plastic material of the circuit board forming the first outer side. Such pads are easy to contact by soldering or by another electrical connection technology and can thus be connected, for example, to a sensor or one or more other electronic components.
- a first multifunctional module can be attached to, for example, the inner side of a wall and acoustically coupled, while another multifunctional module is attached to the outer side of the wall, ideally opposite the first multifunctional module, and acoustically coupled.
- the multifunctional modules convert the signals into acoustic waves that can penetrate the wall.
- the multifunctional modules can in particular use suitable signals and protocols to ensure good transmission through the wall.
- Each of the multifunctional modules can be operated analogously, i.e.
- Each of the multifunctional modules can therefore function with an NFC protocol and corresponding signals, for example, and can as functions, for example, a universal ID number and/or energy harvesting for a regulated supply voltage and a test of the current capability of the channel and/or a digital I 2 C interface with master function and/or a memory management with fixed and/or volatile memory and/or encryption.
- Figure 1 is a schematic representation of an electro-acoustic multifunctional module according to an embodiment
- FIGS. 2A to 2M are schematic representations of an electro-acoustic multifunctional module according to further embodiments.
- FIG. 3 is a schematic representation of an electro-acoustic communication system according to another embodiment
- FIG. 4 is a schematic representation of an electro-acoustic communication system according to another embodiment
- FIG. 5 is a schematic representation of an electro-acoustic communication system according to another embodiment.
- Figure 6 is a schematic representation of an electro-acoustic communication system according to a further embodiment.
- identical, similar or similarly acting elements can each be provided with the same reference symbols.
- the elements shown and their relative sizes to one another are not to be regarded as being to scale; rather, individual elements, such as layers, components, structural elements and areas, can be shown exaggeratedly large for better representation and/or better understanding.
- FIG. 1 shows an electro-acoustic multifunctional module 100 according to an exemplary embodiment.
- the multifunctional module 100 has a one-piece module body 1 with a first outer side 11 and a second outer side 12.
- An electrical interface 13 is provided on the first outer side 11.
- An acoustic interface 14 is provided on the second outer side 12, which has a piezoelectric component 30.
- the multifunctional module 100 is designed such that, for example, it can provide an acoustic output signal at the acoustic interface 14 based on an electrical input signal at the electrical interface 13. Simply put, the multifunctional module 100 can convert an electrical signal directly or indirectly into an acoustic signal.
- the multifunctional module 100 is designed such that, based on an acoustic input signal at the acoustic interface 14, it can provide an electrical signal in an internal circuit and/or at the electrical interface 13. Simply put, the multifunctional module 100 can convert an acoustic signal directly or indirectly into an electrical signal.
- the multifunctional module 100 is particularly designed to have several functionalities. The several Functionalities can in particular include data transmission and energy transmission, whereby the multifunctional module 100 can be used both on a transmitter side and on a receiver side of a communication system. In particular, one or more functionalities of the multifunctional module 100 can be selected by an external connection of the electrical interface 13 that can be carried out by a user. Further features and embodiments of the multifunctional module 100 are explained in connection with Figures 2A to 2M.
- At least two multifunctional modules 100 can be part of an electro-acoustic communication system 1000, as explained in more detail in connection with Figures 3 to 6.
- Figures 2A to 2M show three-dimensional views of the multifunctional module 100 with a view of the acoustic interface 14 and with a view of the electrical interface 13.
- Figures 2C and 2D show schematic sectional views of various variants of the multifunctional module 100.
- Figures 2E to 2M show further plan views, sectional views and schematic drawings of parts of the multifunctional module 100 to explain various aspects and features. The following description refers to all Figures 2A to 2M.
- the multifunctional module 100 has, as can be seen in Figures 2A and 2B, a compact module body 1, which is preferably cuboid-shaped. Alternatively, however, Other shapes are also possible, for example a cylinder shape with a round base or a prism shape with a polygonal base, for example a hexagonal base. Regular polygonal bases such as a rectangle, square or hexagon can be advantageous if, for example, several multifunctional modules 100 are to be arranged close to one another in a space-saving manner.
- the module body 1 has a first main surface, which is formed by the first outer side 11 with the electrical interface 13.
- the module body 1 also has a second main surface, which is formed by the second outer side 12 with the acoustic interface 14.
- the two main surfaces are connected to one another by side surfaces.
- the main surfaces each have a larger surface area than each of the side surfaces, as shown, so that a height of the module body 1 perpendicular to the main surfaces is smaller than the side lengths of the main surfaces.
- the module body 1 is designed as a cuboid with square main surfaces with side lengths, i.e.
- the multifunctional module 100 can have a volume of greater than or equal to 5 mm 3 and less than or equal to 300 mm 3 and thus be very compact and have a small design.
- the multifunctional module 100 with the cuboid module body 1 dimension of 5 .1 mm x 5 .1 mm * 1 .2 mm ( length * width * height ) .
- the module body 1 has two circuit boards 15, 16 which are arranged one above the other and connected to one another by means of an intermediate layer 17, as indicated by the dashed lines in Figures 2A, 2C and 2D.
- the module body 1 has a first circuit board 15 with the first outer side 11 on which the electrical interface
- the first and second circuit boards 15 are provided on .
- the module body 1 is preferably manufactured in the form of a composite, as described above in the general part.
- the side of the first circuit board facing away from the intermediate layer 17 is preferably manufactured in the form of a composite, as described above in the general part.
- the intermediate layer 17 can be formed from a plastic material such as a resin, for example with or from epoxy, and can cover electrical and electronic components mounted on the first circuit board 15 completely and preferably without cavities, so that the entire area between the first and second circuit boards 15, 16 is filled and the intermediate layer 17 forms a connecting layer for the material-locking connection of the first circuit board 15 to the second circuit board 16.
- a piezoelectric component 30 is mounted as an acoustic interface 14.
- the piezoelectric component 30 is an electro-acoustic transducer and has a piezoelectric material 33 on which electrode layers 31, 32 are applied for electrical contact, as is indicated in a sectional view in Figure 2G.
- the piezoelectric component 30 preferably has a lead-free material.
- the piezoelectric component 30 can also have PZT, for example.
- the piezoelectric component 30 is particularly preferably designed in the form of a circular disk.
- the piezoelectric component 30 can also be a polygonal disk, for example.
- a height of the piezoelectric component 30 along the arrangement direction of the piezoelectric component 30 on the module body 1 is smaller than a width or a diameter of the piezoelectric component 30 in a direction perpendicular to the arrangement direction.
- the second circuit board 16 has a first electrode structure 61 and a second electrode structure 62 on the second outer side 12 for mounting and electrically connecting the piezoelectric component 30, which are formed on regions of the second outer side 12.
- the position of the piezoelectric component 30 above the electrode structures 61, 62 is also indicated by the dashed line.
- the first and second electrode structures 61, 62 which are particularly preferably formed by metallizations of the second circuit board 16, each have a grid structure and are therefore not formed over the entire surface of the intended areas of the second outer side 12.
- the first electrode structure 61 is contacted by an electrical via 41 which extends through the module body 1 from the second outer side 12 to the first outer side 11.
- the second electrode structure 62 is contacted by a further electrical via 42 which extends through the module body 1 from the second outer side 12 to the first outer side 11.
- the piezoelectric component 30 is attached to the first and second electrode structure 61, 62 and electrically connected, as indicated in Figure 2G.
- the piezoelectric component 30 can be soldered or glued onto the first and second electrode structure 61, 62 as shown using a suitable connecting layer 70, which can be formed by a solder or an adhesive.
- the piezoelectric component has
- the piezoelectric component 30 which is designed as a disk, has a bottom side facing the second circuit board 16 and thus the module body and a top side facing away from the second circuit board 12 and thus the module body and opposite the bottom side, with the first electrode layer 31 being attached to the top side. and the second electrode layer 32 is applied to the underside.
- the first electrode layer 31 extends over a side edge of the disk to the underside in order to enable the previously described fastening from the underside.
- the assembly of the piezoelectric component 30 is particularly preferably carried out by means of ref low soldering, by means of an electrically conductive adhesive or also by means of an electrically non-conductive adhesive.
- an electrically non-conductive adhesive the electrode structures 61, 62 and electrode layers 31, 32 arranged on top of one another are pressed against one another by shrinking when the adhesive hardens in such a way that an electrically conductive contact is created.
- the piezoelectric component 30 covers as large a part of the second outer side 12 as possible.
- the second outer side 12 of the module body 1 can, for example, have a first surface area, while the piezoelectric component 30 on the second outer side 12 can occupy a second surface area which is preferably greater than or equal to 50% or greater than or equal to 60% or particularly preferably greater than or equal to 70% of the first surface area.
- the piezoelectric component 30 is designed as a circular disk as shown, the disk can preferably have a diameter which essentially corresponds to a side length of the module body 1 or at least 80% or at least 90% thereof.
- the part of the second outer side 12 which is free i.e.
- the piezoelectric component 30 is at least partially or completely covered with a protective layer 90, as can be seen in Figures 2A and 2C.
- the piezoelectric component 30 itself can be free of the protective layer 90 on an upper side facing away from the module body 1.
- the protective layer 90 can be applied over the entire second outer side 12 and thus also over the piezoelectric component 30, as is indicated in Figure 2D.
- the protective layer 90 can be additionally or alternatively applied over parts of the side surfaces or the entire side surfaces and/or over parts of the first outer side 11 or the entire first outer side 11 (in each case not shown).
- the protective layer 90 can in particular be electrically insulating and, for example, have a protective varnish or be a protective varnish.
- the protective varnish can, for example, contain or be an epoxy resin.
- the module body 1 i.e. in particular the first circuit board 15 of the module body 1, has a plurality of electrical connection surfaces 21 to 28 as an electrical interface 13, as can be seen in particular in Figures 2B and 2H.
- the electrical connection surfaces 21 to 28 are arranged on the first outer side 11 and are particularly preferably designed as metallizations of the first circuit board 15.
- the electrical interface 13 has in particular a first connection surface 21 and a second connection surface 22, wherein the first connection surface 21 is connected to the first electrode structure 61 on the second outer side 12 is directly electrically connected, while the second connection surface 22 is directly electrically connected to the second electrode structure 62 on the second outer side 12 via the previously described further electrical via 42 through the module body 1, as can be seen in the sectional view shown in Figure 21 through the module body 1 along the cutting plane HH indicated in Figure 2H.
- the acoustic interface 14 can be directly controlled or read from the outside by external contacting of the first and second connection surfaces 21, 22, which corresponds to an analog operation of the multifunctional module 100.
- the first circuit board 15 has, as an electrical interface 13 on the first outer side 11, in addition to the first and second connection surfaces 21, 22, further connection surfaces 23 to 28. Furthermore, on the inner side 18 of the first circuit board 15 opposite the first outer side 11 and thus facing the intermediate layer 17, a wiring level 80 in the form of contact points 81 and conductor tracks 82 is formed, as can be seen in various top views of the inner side 18 in Figures 2J, 2K and 2L. In Figure 2L, the positions of the connection surfaces 21 to 28 on the first outer side 11 are also indicated.
- Figure 2M shows a schematic circuit diagram of the wiring level 80 and the connection surfaces 21 to 28.
- the contact points 81 of the wiring level 80 can be provided and set up so that one or more electrical and/or electronic components can be mounted on them.
- the semiconductor chip 50 is designed to provide at least one or more of the following functionalities: energy harvesting, I 2 C interface, memory management, encryption.
- the semiconductor chip 50 can be a chip from the "NTAG" series from NXP Semiconductors.
- the design of the wiring level 80 and the designations in Figure 2L and in particular in the circuit diagram in Figure 2M are shown purely as examples for such a semiconductor chip and are not to be understood as limiting.
- connection surfaces 21 to 28 is electrically connected to the wiring level 80 via at least one electrical via 41 to 48.
- a third connection surface 23 on the first outer side 11 is electrically connected to the wiring level 80 on the inner side 18 of the first circuit board 15.
- the first connection surface 21 is also electrically connected to the wiring level 80 via the previously described electrical via 41, which extends through the module body 1.
- further connection surfaces on the first outer side can be electrically connected to the wiring level via electrical vias.
- the connection surfaces 21, 23, 24, 25, 26 and 28 are electrically connected to the wiring level 80 via one of the electrical vias 41, 43, 44, 45, 46 and 48.
- connection surfaces and contact points can be connected via other electrical or electronic components such as resistors, inductors and capacitors, which in Figures 2L and 2M are designated RI, R2, LI and CI, are connected to one another.
- resistors inductors and capacitors
- in Figures 2L and 2M are designated RI, R2, LI and CI
- the use of the inductor designated LI between the first and third connection areas 21, 23 can be particularly advantageous.
- an inductor with an inductance of 220 nH, a capacitor with a capacitance of 100 nF and resistors each with a resistance value of 22 kOhm can be used.
- the acoustic interface 14 can be connected to the semiconductor chip 50, so that digital operation of the acoustic interface 14 is possible.
- the multifunctional module 100 described here is compact and delimited and offers a clearly defined range of functions, which is described below in conjunction with further features and exemplary embodiments.
- the multifunctional module 100 has defined mechanical, electrical and information technology properties due to its structure, which can be used in particular for an electro-acoustic communication system 1000, which is described in various application possibilities in conjunction with Figures 3 to 6.
- the communication system 1000 has at least two identical multifunctional modules 100, which, as described above and below, each have a collection of different functionalities that can be selected through different external connections of the respective electrical interface.
- the communication system 1000 therefore has in particular at least a first electro-acoustic multifunctional module 100 of the at least two electro-acoustic multifunctional modules 100, which is attached to a first side of the wall 200.
- the at least one first multifunctional module 100 with the acoustic interface is attached to the first side of the wall 200.
- the communication system 1000 has at least one further electro-acoustic multifunctional module 100 of the at least two electro-acoustic multifunctional modules 100, which is attached to a second side of the wall 200 opposite the first side.
- the at least one further multifunctional module 100 with the acoustic interface is attached to the second side of the wall 200, so that the acoustic interfaces of the two multifunctional modules 100 face each other.
- the at least one first multifunctional module 100 and the at least one further multifunctional module 100 can, as shown, particularly preferably be attached directly opposite each other on the wall 200.
- an acoustic wave generated by the acoustic interface of one multifunctional module 100 can be transmitted through the wall 200 from the acoustic Interface of the further multifunctional module 100 can be detected, the acoustic wave being conducted through the wall 200.
- Unidirectional operation or bidirectional operation may be possible here.
- the wall 200 can particularly preferably be a metal wall. Furthermore, other materials for the wall are also possible which have sufficient structure and strength to conduct acoustic waves.
- each of the multifunctional modules 100 can also be mounted on a metal wall using a magnet, wherein the magnet is glued to the acoustic interface of the respective multifunctional module 100.
- At least one respective multifunctional module is connected to electrical and/or electronic components, whereby the respective functionality is selected and communication between the electrical and/or electronic components on the two sides of the wall is made possible.
- Each of the multifunctional modules 100 is provided with all its components as a one-piece device and is available as a structural unit that cannot be disassembled into several parts without causing damage under normal conditions. This applies in particular to the module body.
- the technology described above also referred to as “embedded components PCB", is used to construct the multifunctional modules.
- This technology contains an electronic circuit with the near-field communication transponder chip in a miniaturized design in the one-piece module body.
- the acoustic interface is formed by the piezoelectric component as described.
- each of the multifunctional modules 100 On the bottom or rear side of each of the multifunctional modules 100, which faces away from the wall and which is formed by the first outer side, there are the connection surfaces that form electrical connection pads that enable electrical connection of further elements in the form of external components such as a sensor, an analog-digital converter and the like.
- the multifunctional module 100 offers a variety of different application possibilities that are possible without changing the respective internal architecture of the multifunctional modules. are .
- each of the multi-function modules 100 has the piezoelectric transducer in the form of the piezoelectric component, which is well suited for electro-acoustic conversion in a certain frequency range.
- This can particularly preferably be a frequency range of greater than or equal to 9 MHz and less than or equal to 15 MHz, in which, for example, the frequency 13.56 MHz usual for near-field communication lies. Direct or indirect electrical contact from the outside to the piezoelectric component is possible via the electrical interface.
- the multi-function module can be connected 100 on one side, for example, as indicated in Figure 4 on the left side of the wall, connect an electronic component 400 such as an NFC reader with a suitable adaptation network. If the reader supports, for example, the ISO/IEC15693 standard or another corresponding standard, an acoustic transmission of energy and data through a wall 200 such as a metal wall is possible.
- each of the multifunctional modules 100 offers an electrical circuit in the form of a semiconductor chip, which is a transponder and which can be formed, for example, by an integrated circuit (IC) from the NTAG series from NXP Semiconductors. As described above, it is possible to connect such a circuit at the input to the piezoelectric component via the electrical interface. If such a multifunctional module 100, shown on the right-hand side of the wall in Figure 4, is addressed with a suitable protocol and suitable signals, it responds in the protocol and reveals its universal ID number.
- IC integrated circuit
- the unique ID number of the transponder formed by the semiconductor chip can thus be read out via the acoustic channel if all the necessary framework conditions are met, for example if the semiconductor chip receives sufficient voltage amplitude for its function.
- the multi-function module 100 on the right side of the wall 200 in Figure 4 can, in addition to the function of an acoustic ID tag, also fulfill the function of a non-volatile data storage device, which can be read by the part of the communication system 1000 arranged to the left of the wall 200.
- the electrical connection surfaces and/or other parts of the module can be coated with an insulating protective layer 91 as mentioned above, as indicated in Figure 4.
- the control side i.e. on the left-hand side of the wall in Figure 4
- external electronics such as a so-called reader as described
- Another transponder or another circuit can also be connected to the electrical interface.
- an external adaptation network can also be connected and, if required, connected to the second input of the integrated transponder circuit via the first connection surface. This can, for example, lead to an improvement in efficiency through a larger and possibly more expensive adaptation network.
- the integrated transponder circuit in the form of the wiring level with the semiconductor chip with the piezoelectric component can be made possible, as described above, for example by establishing an electrical connection between the third connection surface and the piezoelectric component, which is achieved by electrically connecting the second and third connection surfaces. This is possible directly using external wiring by short-circuiting the second and third connection surfaces, or by adding further elements in the connection between the second and third connection surfaces, which are suitable for impedance matching, for example. If the integrated semiconductor chip is connected to the piezoelectric component in this way, functions such as energy harvesting and a digital interface are available. In this case, it can also be advantageous for some applications, for example, if the other connection surfaces of the electrical interface of the multifunctional module on the control side are not connected to one another, but are used according to their transponder function.
- FIG. 5 A corresponding application example is indicated in Figure 5.
- other components 401 in the form of circuits and/or electronic components for example MEMS components and/or sensors, can be electrically and/or mechanically connected to the electrical interface and thus to the multifunctional module 100 in the manner of a "modular system", as is indicated in Figure 5 on the right-hand side of the wall.
- harvested electrical power is available via the connection areas 24 and 28 marked “GND” and "VCC” in Figure 2M if the basic conditions are selected appropriately. Any electrical consumer can be connected to these connection areas if its power consumption is lower than the power that can be made available via the acoustic signal transmission through the wall and the semiconductor chip.
- This Output can be switched on and off by control by commands of the previously described reader, which as previously mentioned is connected to the multifunctional module 100 on the left side of the wall in Figure 5.
- three different regulated voltages can be provided with the previously described semiconductor chip, namely 1.8 V, 2.4 V and 3.0 V, and the current carrying capacity can be tested before activation.
- the communication system 1000 can accordingly have a first plurality of electro-acoustic multifunctional modules 100 on the first side of the wall 200 and a further plurality of multifunctional modules 100 on the second side of the wall 200, which are connected in parallel and connected to an electronic component 401 such as a sensor.
- an electronic component 401 such as a sensor.
- a further multifunctional module 100 can be attached to the second side.
- all multifunctional modules 100 of the communication system 1000 are designed identically.
- the multi-functional modules 100 are used on each side of the wall, so that the multi-functional modules 100 can be used as a universal component on each side of the wall and the communication system 1000 can thus have a simple and cost-effective structure.
- the transmission reliability can be increased by a corresponding plurality of multifunctional modules 100 per side of the wall 200.
- a digital interface according to I 2 C specification with master function is available in addition to the connection areas 24 and 28 marked “GND” and “VCC” in Figure 2M via the connection areas 25 and 26 marked “SDA” and “SCL". It can be configured, for example in the communication system of Figure 5, via the reader connected on the left side of the wall in the multi-function module 100 connected to it or, via the acoustic signal transmission through the wall 200, in the multi-function module 100 on the right side of the wall 200 and can be used to establish digital bidirectional communication with any component 401 electrically connected to the multi-function module 100 on the right side of the wall.
- the multifunctional module described here can serve as a central element in a modular system for setting up communication systems with acoustic energy and/or data transmission.
- Different sensors can be connected via the generally usable electrical interface. These can also follow the small design of the multifunctional module. In this way, one obtains a range of possible sensor functions based on a single type of communication module in the form of the multifunctional module described here. This makes it possible to produce a large number of identical components without having to adapt them to their later use during production.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
- Combinations Of Printed Boards (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380077981.7A CN120188277A (zh) | 2022-11-11 | 2023-10-27 | 电声多功能模块和电声通信系统 |
| JP2025525386A JP2025541650A (ja) | 2022-11-11 | 2023-10-27 | 電気音響多機能モジュール及び電気音響通信システム |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022129889.2 | 2022-11-11 | ||
| DE102022129889.2A DE102022129889B3 (de) | 2022-11-11 | 2022-11-11 | Elektro-akustisches Multifunktionsmodul und elektro-akustisches Kommunikationssystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024099800A1 true WO2024099800A1 (de) | 2024-05-16 |
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ID=88647677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/080072 Ceased WO2024099800A1 (de) | 2022-11-11 | 2023-10-27 | Elektro-akustisches multifunktionsmodul und elektro-akustisches kommunikationssystem |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2025541650A (de) |
| CN (1) | CN120188277A (de) |
| DE (1) | DE102022129889B3 (de) |
| WO (1) | WO2024099800A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024109310A1 (de) | 2024-04-03 | 2025-10-09 | Tdk Electronics Ag | Elektro-akustisches modul und elektro-akustisches kommunikationssystem |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3521089A (en) * | 1968-06-05 | 1970-07-21 | Atomic Energy Commission | Piezoelectric feedthrough device |
| US10118054B2 (en) * | 2016-07-07 | 2018-11-06 | The Regents Of The University Of California | Implants using ultrasonic backscatter for sensing physiological conditions |
| WO2021168229A1 (en) * | 2020-02-19 | 2021-08-26 | Chan Zuckerberg Biohub, Inc. | A deep tissue ultrasonic implantable luminescence oxygen sensor |
| WO2021197735A1 (de) | 2020-03-31 | 2021-10-07 | Tdk Electronics Ag | Akustisches übertragungssystem, primärschaltung, sekundärschaltung, verfahren zum übertragen und verwendung eines akustischen übertragungssystems |
| WO2022101215A1 (de) | 2020-11-16 | 2022-05-19 | Tdk Electronics Ag | Akustischer transponder, verwendung eines akustischen transponders, verfahren zur herstellung eines transponders und akustisches übertragungssystem |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3261544B2 (ja) | 1991-10-03 | 2002-03-04 | キヤノン株式会社 | カンチレバー駆動機構の製造方法、プローブ駆動機構の製造方法、カンチレバー駆動機構、プローブ駆動機構、及びこれを用いたマルチプローブ駆動機構、走査型トンネル顕微鏡、情報処理装置 |
| JP3445262B2 (ja) | 2001-11-22 | 2003-09-08 | 松下電器産業株式会社 | 圧電体の製造方法、圧電体、超音波探触子、超音波診断装置および非破壊検査装置 |
| CN102668523B (zh) | 2009-12-24 | 2015-11-25 | 诺基亚公司 | 用于在便携式设备中使用的装置 |
| EP2912789B1 (de) | 2012-10-26 | 2017-08-02 | Rensselaer Polytechnic Institute | Akustisch-elektrische kanalkonstruktion und betrieb mit adaptiven wandlerarrays |
| US10295500B2 (en) | 2014-03-27 | 2019-05-21 | Ultrapower Inc. | Electro-acoustic sensors for remote monitoring |
| DE102018203098B3 (de) | 2018-03-01 | 2019-06-19 | Infineon Technologies Ag | MEMS-Sensor |
| DE102019124989A1 (de) | 2019-09-17 | 2021-03-18 | Tdk Electronics Ag | Übertragungsanordnung zur Übertragung elektrischer Energie mit piezoelektrischen Wandlern |
-
2022
- 2022-11-11 DE DE102022129889.2A patent/DE102022129889B3/de active Active
-
2023
- 2023-10-27 JP JP2025525386A patent/JP2025541650A/ja active Pending
- 2023-10-27 WO PCT/EP2023/080072 patent/WO2024099800A1/de not_active Ceased
- 2023-10-27 CN CN202380077981.7A patent/CN120188277A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3521089A (en) * | 1968-06-05 | 1970-07-21 | Atomic Energy Commission | Piezoelectric feedthrough device |
| US10118054B2 (en) * | 2016-07-07 | 2018-11-06 | The Regents Of The University Of California | Implants using ultrasonic backscatter for sensing physiological conditions |
| WO2021168229A1 (en) * | 2020-02-19 | 2021-08-26 | Chan Zuckerberg Biohub, Inc. | A deep tissue ultrasonic implantable luminescence oxygen sensor |
| WO2021197735A1 (de) | 2020-03-31 | 2021-10-07 | Tdk Electronics Ag | Akustisches übertragungssystem, primärschaltung, sekundärschaltung, verfahren zum übertragen und verwendung eines akustischen übertragungssystems |
| WO2022101215A1 (de) | 2020-11-16 | 2022-05-19 | Tdk Electronics Ag | Akustischer transponder, verwendung eines akustischen transponders, verfahren zur herstellung eines transponders und akustisches übertragungssystem |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025541650A (ja) | 2025-12-23 |
| CN120188277A (zh) | 2025-06-20 |
| DE102022129889B3 (de) | 2023-12-21 |
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