Source: https://patents.google.com/patent/DE102015107557A1/en
Timestamp: 2019-12-13 06:03:18
Document Index: 646698737

Matched Legal Cases: ['art 14', 'art 14', 'art 14', 'art 14', 'art 14', 'art 15', 'art 15', 'art 15', 'art 15', 'art 15', 'art 14', 'art 14', 'art 14', 'art 14', 'art 15', 'art 35', 'art 35', 'art 35', 'art 14', 'art 15', 'art 14']

DE102015107557A1 - Circuit board module with a continuous recess and related sound transducer arrangement and manufacturing method - Google Patents
Circuit board module with a continuous recess and related sound transducer arrangement and manufacturing method
DE102015107557A1
DE102015107557A1 DE102015107557.1A DE102015107557A DE102015107557A1 DE 102015107557 A1 DE102015107557 A1 DE 102015107557A1 DE 102015107557 A DE102015107557 A DE 102015107557A DE 102015107557 A1 DE102015107557 A1 DE 102015107557A1
DE102015107557.1A
2015-05-13 Application filed by USound GmbH filed Critical USound GmbH
2015-05-13 Priority to DE102015107557.1A priority Critical patent/DE102015107557A1/en
2016-11-17 Publication of DE102015107557A1 publication Critical patent/DE102015107557A1/en
The invention relates to a printed circuit board module (2) for a sound transducer arrangement (1) for generating and / or detecting sound waves in the audible wavelength spectrum with a printed circuit board (4) having a recess (6) with a first opening (7), and at least one Part of a MEMS sound transducer (5), which is arranged in the region of the first opening (7), so that the recess (6) at least partially forms a cavity (9) of the MEMS sound transducer (5). According to the invention, the recess (6) has a second opening (8) opposite the first opening (7), so that the recess (6) extends completely through the printed circuit board (4). Furthermore, the invention relates to a sound transducer arrangement (1) with such a printed circuit board module (2) and to a method for producing this sound transducer arrangement (1).
The present invention relates to a printed circuit board module for a sound transducer arrangement for generating and / or detecting sound waves in the audible wavelength spectrum with a printed circuit board having a recess with a first opening, and with at least a part of a MEMS transducer arranged in the region of the first opening is, so that the recess at least partially forms a cavity of the MEMS sound transducer.
Furthermore, the invention relates to a sound transducer arrangement with a printed circuit board module which comprises a printed circuit board with a first opening having a recess and at least a part of a MEMS sound transducer, said part being arranged in the region of the first opening, so that the recess at least partially a cavity of the MEMS transducer and with a membrane module having a membrane frame connected to the printed circuit board module and at least one membrane held by the membrane frame, wherein the membrane in the extension of the recess is connected to the at least part of the MEMS sound transducer ,
Moreover, the invention relates to a method for producing a sound transducer arrangement in which a membrane module is connected to a printed circuit board module, wherein a membrane of the membrane module and an actuator structure of the printed circuit board module, both of which are deflectable along a common z-axis, positioned between a ram and a reference tool and be pressed between these two, so that connect the two modules in a first connection area with each other.
The term MEMS stands for microelectromechanical systems. The term "cavity" is to be understood as a cavity by means of which the sound pressure of the MEMS sound transducer can be amplified.
From the DE 10 2011 084 393 A1 is a micromechanical functional device, in particular speaker device, and a corresponding manufacturing method known. The functional device comprises a substrate, at least one circuit chip mounted on the substrate, a wrapping package in which the circuit chip is packaged, a micromechanical functional arrangement, in particular loudspeaker arrangement, with a plurality of micromechanical loudspeakers which is mounted on the wrapping and one above the micromechanical Functional arrangement, in particular loudspeaker arrangement, covering device opposite the wrapping packaging. A major disadvantage of such transducer arrangements is that their manufacture is complex and costly. Furthermore, the scrap costs are very high because the transducer assembly can be tested only in the fully assembled state and consequently the entire device is broke in case of a defect.
It is therefore an object of the present invention to provide a sound transducer arrangement and a manufacturing method for this sound transducer arrangement, so that the production costs and the scrap costs can be reduced.
The object is achieved by a printed circuit board module having the features of patent claim 1, a sound converter arrangement having the features of independent patent claim 5, and by a method for producing such a sound transducer arrangement having the features of independent patent claim 9.
A printed circuit board module is proposed for a sound transducer arrangement for generating and / or detecting sound waves in the audible wavelength spectrum. The printed circuit board module comprises a printed circuit board and at least part of a MEMS sound transducer. This part of the MEMS sound transducer may for example be a MEMS actuator - in particular with a substrate and / or an actuator structure - or a membrane. In a separate manufacturing step, this part of the MEMS sound transducer connected to the printed circuit board module can be connected to another part of the MEMS sound transducer to completely form the MEMS sound transducer.
The circuit board has a recess. The recess comprises a first opening. The part of the MEMS sound transducer is arranged in the region of the first opening. In this way, the recess at least partially forms a cavity of the MEMS sound transducer. The recess has a second opening opposite the first opening. As a result, the recess extends completely through the circuit board. Preferably, the recess extends along a z-axis, in the direction of which a membrane provided for this purpose is able to oscillate.
Due to the at least partially integrative formation of the cavity in the printed circuit board, the proposed printed circuit board module, in particular in the z-direction, are designed to save space, since additional components, in particular additional housing parts, smaller sized for the formation of the cavity or even completely saved. Accordingly, the circuit board cavity or the recess in the area its second opening by means of a, in particular plate-shaped, housing part to be closed when the volume of the cavity formed by the recess for the individual application is sufficient. Alternatively, however, to increase the performance of the MEMS sound transducer, the volume of the recess may be widened by an additional volume formed in the housing part itself, if a higher sound pressure is required. In this case, the cavity would be formed at least by the final housing part and the recess. As a result, the cavity of the MEMS sound transducer can be quickly, easily and inexpensively adapted to the particular application by means of the through-cut without having to change the circuit board. The printed circuit board module can thus be expanded in a modular design by various additional components and adapted to different requirements.
A further advantage of the continuous recess is that the MEMS sound transducer does not have to be connected as a whole to the printed circuit board in order to be able to test the functionality of its electronic components (in particular a MEMS actuator and / or an ASIC). Thus, parts of the MEMS sound transducer and / or the transducer assembly due to the continuous recess can also be subsequently attached to the PCB module. For this purpose, the second opening constitutes a mounting opening, via which an assembly tool can be inserted.
Accordingly, for example, only the MEMS actuator - without the membrane - may be connected as part of the MEMS sound transducer to the printed circuit board or to the ASIC preferably embedded therein. Subsequently, the functionality of this unit or this module can be tested. If this unit is defective, only the components covered by this unit need to be disposed of. The other components of the transducer assembly, in particular the membrane, the membrane support and / or additional housing parts, can be saved, whereby the waste costs are reduced.
However, if the bump test yields a positive result, the circuit board module may be connected to the other components of the MEMS transducer in a subsequent connection procedure. For this purpose, a reference tool is introduced via the second opening of the recess in this. The reference tool is in this case positioned within the recess in such a way that it holds in position the deflectable and / or movable components of the MEMS sound transducer, in particular the actuator structure and / or the membrane, so that they are not damaged during mutual pressing , The reference tool thus acts as a counter-stop. The second opening is thus preferably designed as a mounting feed opening for the reference tool.
It is advantageous if the circuit board is formed as, in particular circumferentially closed, frame. It is also advantageous if the printed circuit board is made up of several layers. By a layered structure of the circuit board electronic components can be easily and inexpensively integrated or embedded in the circuit board.
Additionally or alternatively, it is advantageous if an ASIC is embedded in the printed circuit board, in particular in its edge region designed as a frame. Passive additional components are advantageously embedded alternatively or additionally in the edge region of the printed circuit board. The frame encloses circumferentially the recess of the circuit board, so that the first opening and the second opening are formed axially to the frame. The construction volume of the printed circuit board can be used as efficiently as possible if the electronic components, in particular an ASIC and / or passive additional components, are embedded in the edge region of the printed circuit board. As a result, the printed circuit board module can be made very compact.
Furthermore, it is advantageous if that part of the MEMS acoustic transducer which is connected to the printed circuit board in the region of the first opening is a MEMS actuator. The MEMS actuator preferably comprises a substrate frame, an actuator structure and / or a coupling element. The substrate frame preferably has a substrate recess. The actuator structure is fastened in particular to the side of the substrate frame facing the printed circuit board. The actuator structure, which preferably comprises at least one cantilever, is deflectable with respect to the substrate frame along a z-axis. The actuator structure is preferably formed from at least one piezoelectric layer. The coupling element is arranged in particular in the substrate recess and / or attached to the actuator structure, in particular at its free end. The substrate frame is preferably made of silicon. If the acoustic transducer arrangement functions as a loudspeaker, the actuator structure can be excited via the embedded ASIC in such a way that a diaphragm for generating sound energy is set in oscillation by the MEMS actuator. If the sound transducer arrangement acts as a microphone, the vibrations are converted by the actuator structure into electrical signals.
It is also advantageous if the width of the recess of the printed circuit board is less than or equal to the Width of the substrate recess is. The MEMS loudspeaker can thereby be carried by the printed circuit board, in particular by its edge region formed as a frame. Due to the advantageous embodiment, the MEMS actuator can be connected in a cost-effective manner to the printed circuit board, in particular adhesively bonded. Furthermore, the sound transducer assembly can be made compact as a result, since the outer width of the circuit board can be reduced.
Another advantage is when the MEMS actuator is arranged in the direction of the z-axis immediately adjacent to the circuit board. As a result, the height of the printed circuit board assembly can be reduced.
The MEMS actuator interacts with the membrane provided for this purpose. The actuator structure converts electrical signals into acoustically perceptible sound waves. To increase the amplitude of the sound waves, it is therefore advantageous if the MEMS actuator is strongly deflectable in the direction of the z-axis. This can be facilitated if the MEMS actuator is spaced in the direction of the z-axis by means of a spacer from the circuit board. The spacer is preferably designed as an electrical contact, which in particular connects the ASIC with the actuator structure.
Also proposed is a sound transducer arrangement for generating and / or detecting sound waves in the audible wavelength spectrum with a printed circuit board module and a membrane module. The printed circuit board module has a printed circuit board. The printed circuit board comprises a recess and at least part of a MEMS sound transducer, in particular a MEMS actuator. The recess has a first opening. The part of the MEMS sound transducer is arranged in the region of the first opening, so that the recess at least partially forms a cavity of the MEMS sound transducer. The membrane module has a membrane frame and at least one membrane held by the membrane frame. The membrane frame is connected to the printed circuit board module. The membrane is connected in the extension of the recess with the at least part of the MEMS sound transducer. The printed circuit board module is formed according to the preceding description, wherein said features may be present individually or in any combination.
The modular construction of the sound transducer arrangement makes it possible to test the individual modules, in particular the printed circuit board module and the membrane module, independently of one another prior to assembly for its functionality. The electrical components, such as an ASIC, a MEMS actuator and / or passive additional components can be checked for their functionality and, if necessary, be sorted out in the case of a defect. Advantageously, the inventive sound transducer arrangement allows the early identification of faulty modules. The number of defective transducer assemblies can be reduced in this way, which saves costs. Likewise, through the continuous printed circuit board recess, a production method can be selected in which the sensitive components of the MEMS sound transducer, namely in particular the actuator structure and / or the membrane, are not damaged. In the recess, which extends from the second opening to the first opening, a reference tool can thus be introduced via the second opening, which can be positioned in the region of the flexible actuator structure. To connect the MEMS actuator with the membrane they are pressed together. In this case, the actuator structure and / or the membrane can be held in position by the reference tool, so that they are not deflected beyond their maximum permissible deflection range. Thus, damage to the actuator structure and / or the membrane during bonding and / or pressing can be avoided.
Furthermore, it is advantageous if the membrane is connected to an actuator structure of a MEMS actuator in an inner first connection region, in particular indirectly (i.e., via at least one intermediate element, in particular a coupling element). By the actuator structure, a lifting movement can be generated, by means of which the membrane is deflected.
It is particularly advantageous if the first connection region is formed between a coupling element of the MEMS actuator arranged on the actuator structure and the membrane, in particular a reinforcing element of the membrane. By the reinforcing element, the sensitive membrane is protected from damage caused by excessive movement of the membrane due to excessive sound pressure or external shock or shock.
It is likewise advantageous if the membrane frame is connected in an outer second connecting region, indirectly and / or directly to the printed circuit board. The membrane module is thus connected to the first connection region formed between the membrane and the coupling element and to the printed circuit board module via the second connection region formed between the membrane frame and the printed circuit board. The circuit board designed as a frame, in particular its front side facing the membrane module, serves as a peripheral receiving surface for the membrane frame, so that a stable and secure connection can be made.
Likewise, there are advantages if the sound transducer arrangement, in particular the printed circuit board module, has a first housing part closing off the cavity. In this regard, it is advantageous if the first housing part partially forms the cavity. Thus, it is possible to customize the transducer assembly according to the requirements. The sound pressure and thus the sound that can be generated by a sound transducer arrangement is decisively determined by the cavity. In order to improve performance, the cavity can be increased as required by the first housing part. With very limited space, it is advantageous if the cavity ends at the second opening. Here, the second opening is preferably closed by means of the first housing part, so that the size of the cavity from the first opening, starting in the direction of the second opening is defined solely by the recess. In this case, the first housing part is preferably flat and / or plate-shaped.
It is advantageous if the first housing part is arranged on the side of the printed circuit board facing away from the MEMS sound transducer, in particular glued to it. Furthermore, it is advantageous if the first housing part preferably embraces the printed circuit board in a form-fitting manner, in particular in its edge region. The recess of the circuit board can be easily and inexpensively sealed with the first housing part in the course of the manufacturing process.
In order to be able to avoid an acoustic excitation of the first housing part, this is preferably made of a material which is stiffer compared to the substrate frame and / or the printed circuit board, in particular a metal, a ceramic and / or a composite material. It therefore has advantages when the substrate frame, the circuit board and / or the first housing part are formed from mutually different materials. The substrate frame and / or at least partially the coupling element are preferably made of silicon. The circuit board may be formed of a plastic and / or a fiber composite material.
Also proposed is a method for producing a sound transducer arrangement. The sound transducer arrangement is preferably designed according to the preceding description, wherein said features may be present individually or in any combination. In the proposed manufacturing method, a membrane module is connected to a printed circuit board module. The printed circuit board module is preferably formed according to the preceding description, wherein said features may be present individually or in any combination. In the manufacturing process, a membrane of the membrane module and an actuator structure of the printed circuit board module are positioned between a ram and a reference tool. The two modules, i. the membrane module and the PCB module are pressed between the ram and the reference tool. In this case, the membrane module and the printed circuit board module are connected to one another, in particular adhesively bonded, in a first connection region, which is formed between the membrane and the actuator structure. The membrane and the actuator structure are both deflectable along a common z-axis.
Before the two modules are connected to each other, first, in particular in a separate manufacturing step, the printed circuit board module is produced, wherein the actuator structure is attached to a circuit board in the region of a first opening of a recess. Before pressing the two modules, the reference tool is inserted into the recess. The reference tool is introduced via a first opening opposite the second opening in the recess and positioned within this. The positioning takes place in such a way that the actuator structure and / or the membrane are held in position during pressing by the reference tool within a maximum allowable deflection range. This deflection range is defined by the membrane and the actuator structure and can vary depending on the circumstances. Significant influence thereby have the materials used in the membrane and / or the actuator structure. The production method according to the invention makes it possible to ensure that the flexible actuator structure and the sensitive membrane are not deflected beyond their respective maximum permissible deflection range in the z-direction, as a result of which they could be damaged. Instead, they are supported by the reference tool in the z-direction. The reference tool thus acts as a stop surface, by means of which the actuator structure and the membrane are held in position during the pressing. This also has an advantageous effect on the quality of the sound transducer arrangement. The cost of the method for producing a transducer assembly can also be reduced, since only a few steps are necessary and less waste is produced.
It is advantageous if the reference tool is inserted so far into the recess until it comes to rest on the actuator structure. The flexible, in particular deflectable in the z-direction, actuator structure can be kept in this way in its neutral position, so that no damage can occur, which would limit the functioning of the transducer. Furthermore, this can improve the quality of the sound transducer assembly.
Likewise, it brings advantages when the printed circuit board module is held in the region of the actuator structure by the reference tool and / or in the region of the printed circuit board by a holding tool. The reference tool and the holding tool can be formed in one piece or in two parts. In a two-part design, it is advantageous if the reference tool is moved relative to the holding tool for insertion into the recess. The holding tool is therefore preferably stationary.
It is advantageous if the printed circuit board module, in particular with its recess, is placed on the corresponding reference tool and / or is held positively in position by the holding tool. It is also advantageous if subsequently an adhesive is applied in the first and / or second connection region.
It is also advantageous if the holding tool is partially positioned on the side of the printed circuit board module facing away from the membrane module, in particular on the printed circuit board. Alternatively or additionally, the reference tool is positioned in the region of the recess. The circuit board module is thus provided in a simple manner and without expensive special tool for connection to the membrane module.
It is advantageous if a gripper grips the membrane module on a membrane frame and / or places it on the printed circuit board module. Additionally or alternatively, the gripper for connection in a second connection region on the circuit board module, in particular in the outer region of the circuit board, positioned and / or pressed with this, in particular in a first and second connection region. The membrane module can be positioned in this way on the provided printed circuit board module. In this case, the membrane frame is preferably positioned on the circuit board designed as a frame, so that they are pressed together in the second connection region. At the same time, the membrane is indirectly positioned on the actuator structure, so that the first connection region is formed. As a result of the positioning using the holding and reference tool on the one hand and the gripper on the other, the two modules are fixed so that they can be pressed together safely. The pressing of the two modules can be done simultaneously or sequentially in the two connection areas. In the case of sequential pressing, preferably the second connection region is preferably pressed first, preferably in the course of positioning on the printed circuit board module, and only then is the first connection region pressed.
Furthermore, it is advantageous if the press ram is displaced in the z direction relative to the gripper. After proper positioning of the two modules, they are pressed together by the force exerted by the ram. After the pressing and / or curing of a bonding agent, in particular of an adhesive applied in the respective bonding area, the press die, the gripper and / or the reference tool can be removed from the sound transducer arrangement.
It is a further advantage if the sound transducer assembly is connected after pressing and / or connecting the two modules with at least one housing part. In this case, the printed circuit board and / or the membrane frame may form part of the outer housing. Through the housing, the sensitive components of the transducer assembly are protected from external influences.
It is advantageous if after connecting the two modules, the second opening of the recess is closed with a first housing part. For this purpose, the first housing part is preferably adhesively bonded to the printed circuit board at an end face facing away from the membrane module.
Further advantages of the invention are described in the following exemplary embodiments. It shows:
1 a printed circuit board module in a sectional view,
2 a membrane module in a sectional view,
3 a method for connecting the printed circuit board module to the membrane module for forming a sound transducer arrangement in a connection press,
4 a sectional view of the according to the in 3 illustrated connecting press manufactured Schallwandleranordnung,
5 A second embodiment of the transducer assembly in a perspective view,
6 a third embodiment of the transducer assembly in a perspective view and
7 A fourth embodiment of the transducer assembly in a perspective view.
In the following description of the figures, in order to define the relationships between the various elements, reference will be made to FIG Objects relative terms, such as above, below, above, below, above, below, left, right, vertical and horizontal, used. It goes without saying that these terms may change in the event of a deviation from the position of the devices and / or elements shown in the figures. Accordingly, for example, in the case of an inverted orientation of the devices and / or elements shown in relation to the figures, a feature specified above in the following description of the figures would now be arranged underneath. The relative terms used thus merely serve to simplify the description of the relative relationships between the individual devices and / or elements described below.
The 1 shows a printed circuit board module 2 in a sectional view. The PCB module 2 essentially comprises a frame formed as a circuit board 4 and a portion of a MEMS transducer 5 (see. 4 ). This part of the MEMS sound transducer 5 is a MEMS actuator according to the present embodiment 16 , The circuit board 4 has a recess 6 with a MEMS actuator 16 facing first opening 7 and one of the first opening 7 opposite second opening 8th on. The recess 6 thus extends completely through the circuit board 4 , It is therefore a through hole. The circuit board 4 includes an ASIC 12 and / or passive additional components 13 completely in the circuit board 4 are integrated. This is the circuit board 4 built up in layers. The circuit board is formed as a circumferentially closed frame, wherein the ASIC 12 and / or the passive additional components 13 embedded in the frame or border area.
The MEMS actuator 16 essentially comprises an actuator structure 19 , a substrate frame 17 and a coupling element 20 , The substrate frame 17 has a substrate recess 18 on. In the middle area of the substrate recess 18 is the coupling element 20 arranged. About the particular piezoelectric actuator structure 19 is the coupling element 20 with the substrate frame 17 connected. The coupling element 20 and the substrate frame 17 are made of a silicon substrate have the same thickness. The actuator structure 19 is on the circuit board 4 facing side of the substrate frame 17 arranged. The MEMS actuator 16 , in particular the actuator structure 19 , is with the circuit board 4 , especially the ASIC 12 and / or the at least one passive additional component 13 , electrically connected.
The actuator structure 19 is in the area of the recess 6 , in particular the first opening 7 arranged. The recess 6 is present as wide as the substrate recess 18 educated. The MEMS actuator 16 is in the range of the substrate frame 17 with the circuit board 4 connected. The actuator structure 19 can be compared to the substrate frame 17 and the circuit board 4 swing in z direction. Here, the coupling element 20 along the z-axis deflected from the presently illustrated neutral position. The recess 6 or the circuit board cavity forms at least partially a cavity 9 of in 4 fully illustrated MEMS transducer 5 ,
This in 1 illustrated printed circuit board module 2 has a first connection area 23 on. This is on one of the actuator structure 19 opposite side of the coupling element 20 educated. Furthermore, the printed circuit board module 2 a second connection area 24 on. This is on a the MEMS actuator 16 facing end face of the circuit board 4 educated. In the first and second connection area 23 . 24 can that in 1 illustrated printed circuit board module 2 with an in 2 illustrated membrane module 3 get connected.
2 shows the membrane module 3 in a sectional view, for connecting to the in 1 illustrated printed circuit board module 2 is provided. The membrane module 3 includes a membrane 10 , This is swingable in its edge region in the z-direction in a membrane frame 11 added. Furthermore, the membrane module comprises 3 a reinforcing element 22 for reinforcing the membrane 10 , The reinforcing element 22 is at a bottom of the membrane 10 arranged. The membrane 10 , which is made of rubber, for example, is in its edge region fixed to the membrane frame 11 connected. Between the edge area and the reinforcing element 22 is an elastic region of the membrane 10 educated. This preferably has a curvature. The reinforcing element 22 even not with the membrane frame 11 connected and thus can oscillate with respect to this in the z direction. The membrane 10 thus spans the membrane frame 11 and is stiffened in its middle range.
According to 2 is the first connection area 23 of the membrane module 3 in on the membrane 10 formed in a central area. The present is the first connection area 23 directly on the reinforcing element 22 educated. In this area, the in 1 illustrated coupling element 20 with the reinforcing element 22 or indirectly with the membrane 10 connected.
The second connection area 24 of the membrane module 3 is according to 2 frontally on the membrane frame 11 arranged. Both connection areas 23 . 24 are therefore frontally oriented to the same side.
3 shows a connection press 40 by means of the in 1 shown PCB module 2 with the in 2 illustrated membrane module 3 can be connected to an in 4 illustrated transducer assembly 1 manufacture. The preassembled PCB module 2 is doing by a holding tool 27 kept in position. The holding tool 27 comes on the circuit board 4 , in particular at the MEMS sound transducer 5 opposite side, to concern. It is also conceivable that the holding tool 27 the circuit board 4 engages positively, so that no lateral movement of the PCB module 2 is possible. The holding tool 27 has a tool recess 30 on, after positioning the holding tool 27 im to the recess 6 adjacent area is arranged. The tool recess 30 forms an extension of the recess 6 , The width of the tool recess 30 is larger, equal to or smaller than the width of the recess 6 ,
The connection press 40 further includes a reference tool 26 , This is narrower than the tool recess 30 so that the reference tool 26 into the tool recess 30 is and executable. The reference tool 26 is therefore along the z-axis relative to the holding tool 27 move axially. The reference tool 26 is in the recess before pressing 6 the circuit board 4 introduced. According to the present embodiment, the reference tool becomes 26 so far in the recess 6 introduced until it with a, in particular plan, support surface 41 in the area of the first opening 7 on the MEMS sound transducer 5 , in particular on the actuator structure 19 and / or the coupling element 20 is applied. This allows the axially flexible and / or moving parts of the MEMS sound transducer 5 in particular the actuator structure 19 , the membrane 10 and / or these two elements coupling coupling element 20 to be held in position. So that the actuator structure 19 and the membrane 10 must not be damaged during pressing due to excessive deflection, the reference tool 26 not necessarily on the actuator structure 19 abut in the illustrated neutral position. It may also be within the maximum allowable deflection range of the actuator structure 19 and / or the membrane 10 be spaced from this. In this case, the actuator structure would 19 thus only when pressing on the support surface 41 come to the concern. To the reference tool 26 To be able to position reliably in the desired support position, the reference tool has 26 an axial stop 36 on. With this beats the reference tool 26 in his in 3 illustrated support end position on the holding tool 27 at.
The connection press 40 further comprises a gripper 28 , The gripper 28 picks up the membrane module 3 on his membrane frame 11 , in particular at the membrane 10 having side of the membrane module 3 to it on the PCB module 2 align and position. The gripper 28 has a gripper recess 31 on, which is after grasping the membrane module 3 above the middle region of the membrane 10 located and the gripper 28 in the deflectable membrane area of the membrane 10 spaced.
The two modules 2 . 3 be by means of the gripper 28 positioned to each other such that the two modules 2 . 3 in the first connection area 23 and the second connection area 24 lie together. In the first connection area 23 become the two deflectable parts in the z direction - namely the membrane 10 and the actuator structure 19 - of the MEMS sound transducer 5 connected with each other. In the illustrated embodiment, the first connection area 23 between the reinforcing element 22 of the membrane module 3 and the coupling element 20 of the PCB module 2 educated. However, it is also conceivable that the membrane 10 directly with the coupling element 20 is connected. Here, the coupling element 20 also be designed in several parts. In any case, the PCB module 2 and the membrane module 3 in the first connection area 23 connected in such a way that the membrane 10 for generating sound waves by means of the actuator structure 19 is deflectable in the z direction.
In the second connection area 24 be the two support parts, by means of which the actuator structure 19 or the membrane 10 are accommodated swingably - namely present the circuit board 4 and the membrane frame 11 - of the MEMS sound transducer 5 connected with each other. The frame-like extending second connection area 24 is therefore in the illustrated embodiment between the membrane frame 11 , in particular at the gripper 28 opposite side, and the outer area of the circuit board 4 educated. Alternatively or additionally, the membrane frame could 11 but also on the substrate frame 17 and / or another carrier part of the printed circuit board module 2 be attached. On both modules 2 . 3 in particular at the adjoining surfaces of the connection areas 23 . 24 An adhesive is applied before the connection.
After the two modules 2 . 3 arranged one another and are aligned to each other, they are pressed together. In the second connection area 24 the pressing of the two modules takes place 2 . 3 between the holding tool 27 and the gripper 28 , For pressing the two modules 2 . 3 in the first connection area 23 has the connection press 40 a punch 25 on. This is preferably a part of the gripper 28 and / or relative to this displaceable in the axial direction. For pressing the two modules 2 . 3 in the first connection area 23 becomes the press stamp 25 through the gripper recess 31 performed until this on the membrane 10 is applied. The press stamp 25 then squeezes the two modules 2 . 3 in the first connection area 23 , The reference tool 26 or its support surface 41 acts as a counterholder and / or holds the actuator structure 19 and the membrane 10 in position, especially in their illustrated neutral position. After pressing and / or curing of the adhesive, the press die becomes 25 , the grapple 28 and / or the reference tool 26 moved back again.
4 shows a first embodiment of the transducer assembly produced by the described method 1 , The sound transducer arrangement 1 according to the method described above from the in 1 illustrated printed circuit board module 2 and in 2 illustrated membrane module 3 produced. The sound transducer arrangement 1 has a housing 29 on. This is partially according to the present embodiment of the membrane frame 11 and the circuit board 4 educated. Furthermore, the sound transducer arrangement comprises 1 a first housing part 14 , This will be after pressing the two modules 2 . 3 at the transducer assembly 1 attached. The first housing part 14 closes the recess 6 on the side of the second opening 8th , For this, this is on the MEMS sound transducer 5 opposite side of the circuit board 4 arranged, in particular flush with this glued. This creates a closed cavity 9 educated. The first housing part 14 is presently plate-shaped and lies flush with the second opening 8th at. As a result, the cavity is 9 in the area of the printed circuit board 4 and on the MEMS actuator 16 opposite side of the circuit board exclusively through the recess 6 educated. The first housing part 14 , the substrate frame 17 and / or the circuit board 4 are preferably made of mutually different materials.
In the 5 to 7 are other embodiments of the transducer assembly 1 shown, in each case substantially to the differences with respect to the already described first embodiment will be discussed. Thus, the same reference numerals are used in the following description of the other embodiments for the same features. Unless these are explained again in detail, their design and mode of action corresponds to the features already described above. The differences described below can be combined with the features of the respective preceding and following embodiments.
5 shows a second embodiment of the transducer assembly 1 in perspective view. The housing 29 is also through the membrane frame 11 , the circuit board 4 and the first housing part 14 educated. In addition, the housing includes 29 however, a second housing part 15 , The second housing part 15 is on the circuit board 4 remote side of the MEMS sound transducer 5 arranged. The membrane 10 is thus between the membrane frame 11 and the second housing part 15 bonded. The second housing part 15 has a sound outlet opening 32 on. Through this, the sound waves that are due to the excitation of the membrane 10 through the actuator structure 19 emerge from the housing 29 escape. The sound outlet 32 is above the central region of the membrane according to the present embodiment 10 arranged. The second housing part 15 protects the elastic region of the membrane 10 that does not pass through the reinforcing element 22 is reinforced.
The first housing part 14 is frontally on the circuit board 4 attached. In an embodiment not shown here, the first housing part 14 the circuit board 4 but also positively engages in its outer edge region. The first housing part 14 contrary to in 4 illustrated embodiment, a housing cavity 33 on. This forms in addition to the recess 6 the cavity 9 out.
6 shows a third embodiment of the transducer assembly 1 , The first housing part 14 also forms by means of the housing cavity 33 a part of the cavity 9 of the MEMS sound transducer 5 out. The housing cavity 33 borders in the area of the second opening 8th directly to the recess 6 the circuit board 4 at.
The second housing part 15 in the present case partially forms a Schallleitkanal 34 out. Another part of the sound conduction channel 34 is from a third housing part 35 educated. The sound outlet 32 is here on the third housing part 35 educated. The third housing part 35 is laterally on the first and second housing part 14 . 15 attached. Accordingly, the generated sound waves from the membrane 10 starting over the second and third housing part 15 . 35 trained Schallleitkanal 34 to the sound outlet 32 and about this from the case 29 the sound transducer assembly 1 directed.
According to the in 6 illustrated embodiment, the recess 6 narrower than the substrate recess 18 , To thereby restrict the maximum deflectability of the actuator structure 19 To avoid in the z-direction, is the actuator structure 19 from the first opening 7 or from the circuit board 4 spaced. For this purpose, the sound transducer arrangement 1 one spacer 21 on. The spacer 21 is preferably formed as an electrical contact. He connects the ASIC 12 electrically with the actuator structure 19 of the MEMS sound transducer 5 , The spacer 21 is between the circuit board 4 and the MEMS actuator 16 , in particular its actuator structure 19 arranged. The MEMS actuator 16 is this way from the circuit board 4 spaced in the z-direction and thus does not abut the circuit board at its deflection 4 at.
7 shows a fourth embodiment of the transducer assembly 1 , Herein is the cavity 9 of the MEMS sound transducer 5 through the recess 6 the circuit board 4 , the housing cavity 33 and an additional volume 38 educated. The additional volume 38 and the housing cavity 33 are via a connection channel 37 connected with each other. The housing of the additional volume 38 is through a first and second housing part 14 . 15 educated.
The present invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims are also possible as a combination of features, even if they are shown and described in different embodiments.
passive additional components
substrate frame
substrate cutout
tool recess
gripper recess
housing cavity
Schallleitkanal
third housing part
DE 102011084393 A1 [0005]
PCB module ( 2 ) for a sound transducer arrangement ( 1 ) for generating and / or detecting sound waves in the audible wavelength spectrum with a printed circuit board ( 4 ), which has a recess ( 6 ) with a first opening ( 7 ), and at least part of a MEMS sound transducer ( 5 ) located in the area of the first opening ( 7 ) is arranged so that the recess ( 6 ) at least partially a cavity ( 9 ) of the MEMS sound transducer ( 5 ), characterized in that the recess ( 6 ) one of the first opening ( 7 ) opposite the second opening ( 8th ), so that the recess ( 6 ) completely through the circuit board ( 4 ).
Printed circuit board module according to the preceding claim, characterized in that the printed circuit board ( 4 ) is formed as a frame, is constructed from several layers and / or, in particular in its edge region formed as a frame, an ASIC ( 12 ) and / or passive additional components ( 13 ) are embedded.
Printed circuit board module according to one or more of the preceding claims, characterized in that the part of the MEMS sound transducer ( 5 ) a MEMS actuator ( 16 ), which preferably has a substrate frame ( 17 ) with a substrate recess ( 18 ), an actuator structure ( 19 ), in particular on the circuit board ( 4 ) facing side of the substrate frame ( 17 ) and / or against this along a z-axis is deflectable, and / or a coupling element ( 20 ), in particular in the substrate recess ( 18 ) and / or on the actuator structure ( 19 ) is attached.
Printed circuit board module according to one or more of the preceding claims, characterized in that the MEMS actuator ( 16 ) in the direction of the z-axis immediately adjacent to the printed circuit board ( 4 ) or by means of a spacer ( 21 ), which is preferably designed as an electrical contact, of the printed circuit board ( 4 ) is spaced.
Sound transducer arrangement ( 1 ) for generating and / or detecting sound waves in the audible wavelength spectrum with a printed circuit board module ( 2 ), which has a printed circuit board ( 4 ) with a first opening ( 7 ) having recess ( 6 ) and at least part of a MEMS sound transducer ( 5 ), wherein this part in the region of the first opening ( 7 ) is arranged so that the recess ( 6 ) at least partially a cavity ( 9 ) of the MEMS sound transducer ( 5 ) and with a membrane module ( 3 ), which has a membrane frame ( 11 ) connected to the PCB module ( 2 ), and at least one of the membrane frame ( 11 ) held membrane ( 10 ), wherein the membrane ( 10 ) in the extension of the recess ( 6 ) with the at least one part of the MEMS sound transducer ( 5 ), characterized in that the printed circuit board module ( 2 ) is formed according to one or more of the preceding claims.
Sound transducer arrangement according to the preceding claim, characterized in that the membrane ( 10 ) in an inner first connection area ( 23 ), in particular indirectly, with an actuator structure ( 19 ) of a MEMS actuator ( 16 ), the first connection area ( 23 ) preferably between one on the actuator structure ( 19 ) arranged coupling element ( 20 ) of the MEMS actuator ( 16 ) and the membrane ( 10 ), in particular a reinforcing element ( 22 ) of the membrane ( 10 ), is trained.
Sound transducer arrangement according to the preceding claim, characterized in that the membrane frame ( 11 ) in an outer second connection region ( 24 ), indirectly and / or directly with the printed circuit board ( 4 ) connected is.
Sound transducer arrangement according to one or more of the preceding claims, characterized in that the sound transducer arrangement ( 1 ), in particular the printed circuit board module ( 2 ), a cavity ( 9 ) Closing and / or the cavity ( 9 ) partially forming the first housing part ( 14 ) having.
Method for producing a sound transducer arrangement ( 1 ), in particular according to one or more of the preceding claims, in which a membrane module ( 3 ) with a printed circuit board module ( 2 ), wherein a membrane ( 10 ) of the membrane module ( 3 ) and an actuator structure ( 19 ) of the printed circuit board module ( 2 ), which are both deflectable along a common z-axis, between a punch ( 25 ) and a reference tool ( 26 ) and be pressed between the two, so that the two modules ( 2 . 3 ) in a first connection area ( 23 ), characterized in that during manufacture of the printed circuit board module ( 2 ) the actuator structure ( 19 ) on a printed circuit board ( 4 ) in the region of a first opening ( 7 ) a recess ( 6 ) and that before pressing the two modules ( 2 . 3 ) the reference tool ( 26 ) via one of the first openings ( 7 ) opposite the second opening ( 8th ) in the recess ( 6 ) and is positioned within it such that the actuator structure ( 19 ) and / or the membrane ( 10 ) during pressing by the reference tool ( 26 ) are held in position.
Method according to the preceding claim, characterized in that the reference tool ( 26 ) so far into the recess ( 6 ) until it is attached to the actuator structure ( 19 ) comes to the concern.
Method according to one or more of the preceding claims, characterized in that the printed circuit board module ( 2 ) in the area of the actuator structure ( 19 ) from the reference tool ( 26 ) and / or in the area of the printed circuit board ( 4 ) of a holding tool ( 27 ), preferably the reference tool ( 26 ) relative to the holding tool ( 27 ).
Method according to one or more of the preceding claims, characterized in that the holding tool ( 27 ) partially at the membrane module ( 3 ) facing away from the PCB module ( 2 ), in particular on the printed circuit board ( 4 ), and / or the reference tool ( 26 ) in the region of the recess ( 6 ) is positioned.
Method according to one or more of the preceding claims, characterized in that a gripper ( 28 ) the membrane module ( 3 ) on a membrane frame ( 11 ) and / or for connection in a second connection area ( 24 ) on the printed circuit board module ( 2 ), in particular on the outer region of the printed circuit board ( 4 ), positioned and / or pressed with this.
Method according to one or more of the preceding claims, characterized in that the press ram ( 25 ) for pressing the first connection area with respect to the gripper ( 28 ) and / or the reference tool ( 26 ) is moved.
Method according to one or more of the preceding claims, characterized in that the sound transducer arrangement ( 1 ) after pressing with a cavity ( 9 ) closing the first housing part ( 14 ) is connected.
DE102015107557.1A 2015-05-13 2015-05-13 Circuit board module with a continuous recess and related sound transducer arrangement and manufacturing method Pending DE102015107557A1 (en)
DE102015107557.1A DE102015107557A1 (en) 2015-05-13 2015-05-13 Circuit board module with a continuous recess and related sound transducer arrangement and manufacturing method
SG10201907304XA SG10201907304XA (en) 2015-05-13 2016-05-10 Circuit board module with a continuous recess and a related sound transducer assembly and a manufacturing method
EP16723324.6A EP3295680B1 (en) 2015-05-13 2016-05-10 Manufacturing method for a sonic transducer assembly with circuit board module having continuous cavity
AU2016261304A AU2016261304A1 (en) 2015-05-13 2016-05-10 Circuit board module comprising a continuous cavity, associated sonic transducer assembly, and production method
KR1020177035939A KR20180014727A (en) 2015-05-13 2016-05-10 Circuit board module, related sound transducer assembly and method of manufacturing same
US15/573,210 US10206046B2 (en) 2015-05-13 2016-05-10 Circuit board module comprising a continuous cavity, associated sonic transducer assembly, and production method
PCT/EP2016/060479 WO2016180841A1 (en) 2015-05-13 2016-05-10 Circuit board module comprising a continuous cavity, associated sonic transducer assembly, and production method
CN201680039763.4A CN107836121A (en) 2015-05-13 2016-05-10 Circuit board module and associated acoustic transducer component and preparation method with continuous recess
SG11201709340PA SG11201709340PA (en) 2015-05-13 2016-05-10 Circuit board module with a continuous recess and a related sound transducer assembly and a manufacturing method
CA2985723A CA2985723A1 (en) 2015-05-13 2016-05-10 Circuit board module with a continuous recess and a related sound transducer assembly and a manufacturing method
DE102015107557A1 true DE102015107557A1 (en) 2016-11-17
ID=56014977
DE102015107557.1A Pending DE102015107557A1 (en) 2015-05-13 2015-05-13 Circuit board module with a continuous recess and related sound transducer arrangement and manufacturing method
US (1) US10206046B2 (en)
EP (1) EP3295680B1 (en)
KR (1) KR20180014727A (en)
CN (1) CN107836121A (en)
AU (1) AU2016261304A1 (en)
CA (1) CA2985723A1 (en)
DE (1) DE102015107557A1 (en)
SG (2) SG10201907304XA (en)
WO (1) WO2016180841A1 (en)
DE4229244A1 (en) * 1992-09-02 1994-03-03 Basf Ag A process for producing microstructure elements
US20110156178A1 (en) * 2009-12-31 2011-06-30 Texas Instruments Incorporated Micro-Electro-Mechanical System Having Movable Element Integrated into Leadframe-Based Package
DE102011084393A1 (en) 2011-10-13 2013-04-18 Robert Bosch Gmbh Micromechanical functional device, in particular speaker device, and corresponding manufacturing method
US20130322675A1 (en) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Sensor module
CN201114763Y (en) * 2007-10-09 2008-09-10 东莞泉声电子有限公司 A silicon speaker
JP5269659B2 (en) * 2009-03-17 2013-08-21 株式会社オーディオテクニカ Condenser microphone unit, method of manufacturing capacitor microphone unit, and capacitor microphone
JP5348073B2 (en) * 2010-06-01 2013-11-20 船井電機株式会社 Electroacoustic transducer mounting substrate, microphone unit, and manufacturing method thereof
CN102655617B (en) * 2012-05-24 2015-09-30 歌尔声学股份有限公司 Method of assembling a microphone
2015-05-13 DE DE102015107557.1A patent/DE102015107557A1/en active Pending
2016-05-10 EP EP16723324.6A patent/EP3295680B1/en active Active
2016-05-10 KR KR1020177035939A patent/KR20180014727A/en unknown
2016-05-10 CA CA2985723A patent/CA2985723A1/en active Pending
2016-05-10 WO PCT/EP2016/060479 patent/WO2016180841A1/en active Application Filing
2016-05-10 SG SG10201907304XA patent/SG10201907304XA/en unknown
2016-05-10 CN CN201680039763.4A patent/CN107836121A/en active Search and Examination
2016-05-10 AU AU2016261304A patent/AU2016261304A1/en active Pending
2016-05-10 US US15/573,210 patent/US10206046B2/en active Active
2016-05-10 SG SG11201709340PA patent/SG11201709340PA/en unknown
US10206046B2 (en) 2019-02-12
SG11201709340PA (en) 2017-12-28
EP3295680B1 (en) 2019-07-10
US20180091905A1 (en) 2018-03-29
SG10201907304XA (en) 2019-09-27
KR20180014727A (en) 2018-02-09
WO2016180841A1 (en) 2016-11-17
EP3295680A1 (en) 2018-03-21
AU2016261304A1 (en) 2017-12-14
CA2985723A1 (en) 2016-11-17
CN107836121A (en) 2018-03-23
EP1755360A1 (en) 2007-02-21 Silicon based condenser microphone and packaging method for the same
EP1765035A2 (en) 2007-03-21 Condenser microphone and packaging method for the same
EP2075221B1 (en) 2015-12-16 Mechanical isolation for MEMS devices
US20100043550A1 (en) 2010-02-25 Physical quantity sensor device and method for producing the same
JP5130054B2 (en) 2013-01-30 Electrical module with MEMS microphone
JP4738481B2 (en) 2011-08-03 Directional silicon condenser microphone with additional back chamber
CN100595909C (en) 2010-03-24 Semiconductor device
KR20010098701A (en) 2001-11-08 A piezoelectric type electric acoustic converter
JP5011820B2 (en) 2012-08-29 Multilayer device and manufacturing method thereof
WO2007145778A3 (en) 2008-05-15 Mems device and method of fabricating the same
US20100155863A1 (en) 2010-06-24 Method for manufacturing a microelectronic package comprising a silicon mems microphone
US20110148256A1 (en) 2011-06-23 Piezoelectric Power Generator
KR100868593B1 (en) 2008-11-13 Semiconductor device and manufacturing method thereof
TW200920157A (en) 2009-05-01 Electro-acoustic sensing device
US7402905B2 (en) 2008-07-22 Methods of fabrication of wafer-level vacuum packaged devices
WO2009071637A3 (en) 2009-11-05 Mems package and method for the production thereof
Free format text: PREVIOUS MAIN CLASS: H04R0019000000
Ipc: H04R0023000000
2018-10-02 R083 Amendment of/additions to inventor(s)