WO2015161940A1 - MIKROFON MIT VERGRÖßERTEM RÜCKVOLUMEN UND VERFAHREN ZUR HERSTELLUNG - Google Patents
MIKROFON MIT VERGRÖßERTEM RÜCKVOLUMEN UND VERFAHREN ZUR HERSTELLUNG Download PDFInfo
- Publication number
- WO2015161940A1 WO2015161940A1 PCT/EP2015/053404 EP2015053404W WO2015161940A1 WO 2015161940 A1 WO2015161940 A1 WO 2015161940A1 EP 2015053404 W EP2015053404 W EP 2015053404W WO 2015161940 A1 WO2015161940 A1 WO 2015161940A1
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- WIPO (PCT)
- Prior art keywords
- microphone
- sound
- guide element
- cover
- bottom plate
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/0032—Packages or encapsulation
- B81B7/0061—Packages or encapsulation suitable for fluid transfer from the MEMS out of the package or vice versa, e.g. transfer of liquid, gas, sound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/0032—Packages or encapsulation
- B81B7/0064—Packages or encapsulation for protecting against electromagnetic or electrostatic interferences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00261—Processes for packaging MEMS devices
- B81C1/00309—Processes for packaging MEMS devices suitable for fluid transfer from the MEMS out of the package or vice versa, e.g. transfer of liquid, gas, sound
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/04—Structural association of microphone with electric circuitry therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
- H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0257—Microphones or microspeakers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2203/00—Basic microelectromechanical structures
- B81B2203/01—Suspended structures, i.e. structures allowing a movement
- B81B2203/0127—Diaphragms, i.e. structures separating two media that can control the passage from one medium to another; Membranes, i.e. diaphragms with filtering function
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2207/00—Microstructural systems or auxiliary parts thereof
- B81B2207/01—Microstructural systems or auxiliary parts thereof comprising a micromechanical device connected to control or processing electronics, i.e. Smart-MEMS
- B81B2207/015—Microstructural systems or auxiliary parts thereof comprising a micromechanical device connected to control or processing electronics, i.e. Smart-MEMS the micromechanical device and the control or processing electronics being integrated on the same substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16151—Cap comprising an aperture, e.g. for pressure control, encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16152—Cap comprising a cavity for hosting the device, e.g. U-shaped cap
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
Definitions
- a so-called bottom port microphone has a housing in which a sound inlet opening is arranged on the underside, ie where external electrical connections of the component are located.
- the internal components (MEMS, ASIC) in the housing below, i.d.R. that is, arranged on a carrier substrate, resulting in a very simple structure.
- the carrier substrate may then be a printed circuit board or a multi-layer substrate, each with integrated wiring and interconnection.
- the sound inlet opening lies on a surface facing away from the outer terminals, in particular the top side of the microphone.
- the MEMS chip and possibly the ASIC
- the MEMS chip can then also be arranged in the region of the sound entrance, but then an electrical rewiring from there to the housing bottom must be made, which is technologically complex and critical for component performance ,
- An alternative is to leave the internal components on the carrier substrate, and instead the incoming sound appropriately through a gap between
- Redirecting components on the carrier substrate as known for example from DE 10 2011 012295 AI.
- the MEMS chip is sealed by a foil cover against the carrier substrate, which simultaneously covers and encloses the existing back volume. But this concept does not allow any Extension of the back volume already present in the MEMS chip.
- the process is also critical to the
- Gap geometry which can lead to adverse noise and resonances.
- one is limited with respect to the positioning of the sound entry on the top of the housing.
- Object of the present invention is therefore to provide a microphone with top arranged sound inlet, which avoids the disadvantages mentioned above. In particular, it is an object to avoid adverse thermo-mechanical stress for the MEMS chip and yet an extended
- the microphone has a closed, particularly rigid
- Cavity housing which has at least one bottom plate, a cover and therein an opening for the sound inlet.
- a MEMS component designed as a microphone transducer and a sound guide element with a sound channel formed therein are arranged adjacent to each other on the bottom plate within the cavity housing and mounted. Inside, more components can be mounted,
- a partition is also provided which divides the cavity into a forward and a backward volume.
- the cavity housing can be made with various technologies known per se. It is important that a cavity is preformed in the housing. This is for example
- a lid encloses and then cover this with a lid. It is also possible to provide a base plate with trough-shaped depression or even a trough-shaped bottom part, in which the components of the microphone can be mounted. Accordingly, the materials used for the housing may be different.
- any known MEMS component can be used. This is characterized by a membrane having a recess in a e.g. crystalline body spans.
- the microphone transducer is designed as a condenser microphone in a silicon body, wherein the membrane is an electrode of the capacitor whose movement against a rigid back electrode changes the capacitance of the condenser ⁇ microphone and so a measure of the
- a sound channel is geometrically defined by a sound guide element and prefabricated as a component.
- the microphone according to the invention is therefore not dependent on any gaps between components of the microphone, which in known solutions as a sound channel
- the sound guide element sits on the bottom plate of the
- the sound guide ⁇ element can therefore be made of different materials. It is possible, for example, this made of metal.
- a metallic sound guide element has the advantage that it can be mounted together with the microphone converter in a simple manner by soldering.
- An opening provided within the cavity separation is not part of the housing but is formed separately from the microphone ⁇ components. The separation allows a
- Sound channel in the sound guide element connects an opening for the sound inlet in the top of the housing with the active side of the microphone transducer.
- the sound guide element is then preferably designed so that by means of
- the separation between the forward and rear volumes is formed as a film which at least the
- Microphone transducer and the sound guide element spans and which rests close to these components close to the bottom plate and seals the components against the back volume.
- films that are known from the packaging ⁇ technology of electrical components and MEMS devices.
- the film comprises, for example, a thermoplastic which is thermoformable.
- thermoplastic which is thermoformable.
- thermoset or a purely thermally deformable state
- the back volume is formed between the used as a separation film and the upper housing part. With the film of the microphone transducer and the sound channel are tightly sealed against the bottom plate. In addition, the sound conduction finished with the sound channel tight against the cover in the area of the opening.
- the microphone transducer itself does not have to seal against the housing, is sealed by the foil used for the separation, and is usually flexible
- the back volume is thus defined solely by the size of the cavity i cavity housing.
- the sound guide element - if necessary, plus a cover layer and / or an adhesive layer located thereon - a greater height above the bottom plate than the microphone transducer and can so after closing the cavity housing on the
- Spans sound guiding element It is also possible to use an additional sealant, e.g. to provide an adhesive or additional film between the release liner over the top of the sound guide member and the housing.
- This additional sealing means may for example be formed as a sealing ring. This may be prefabricated mounted on the underside of the cover around the opening or on the upper end of the sound guide member around the mouth of the sound channel around.
- the sound guide element in such a way that forms after closing the cavity housing, a capillary gap between the sound guide element and cover, which allows the capillary forces a safe flow of a liquid-applied sealant, such as a resin, thus ensuring a complete seal.
- the microphone usually also has an integrated circuit, which is designed, for example, as an ASIC.
- This circuit controls the function of the microphone transducer and takes over at least in part the signal processing of the electrical signal supplied by the microphone transducer.
- the integrated circuit is also on the bottom plate mounted and can optionally be arranged below the separation, ie within the pre-volume. However, it is also possible to cover with the separation alone microphone transducer and sound guide element and the integrated circuit next to it within the back volume on the
- Microphone converter and circuit are electrically connected to the
- the pads are connected to external electrical contacts on the underside of the bottom plate, via which the microphone can be installed in an external circuit environment, for example in a Audiovor ⁇ direction or a cell phone.
- On or within the bottom plate can still be provided an electrical interconnection of the components.
- the cover of the cavity housing is formed as a cap glued or soldered on the bottom plate, under which the cavity of the cavity housing is enclosed.
- the cap is formed of metal or comprises at least one metal layer. This has the advantage that the microphone transducer and the integrated circuit are electromagnetically shielded from the environment and trouble-free operation of the microphone
- the sound guide element has at least one plane surface pointing upwards, in which the sound channel opens. Furthermore, the sound guide element has at least one side part, with which it rests on the bottom plate. The sound channel can be largely closed. It is also possible, however, with the sound guide element to perform only one side wall, wherein the opening of the
- Sound channel can be an acoustically optimized course
- the sound guide element may be made of metal, ceramic,
- the latter embodiment has the advantage that the material is compatible with the assembly process and in a simple manner on the bottom with solderable
- Metallizations can be provided. In the
- Circuit board technology are also known methods in which geometrically structured three-dimensional body in
- FIG. 1 shows a microphone according to the invention in a schematic cross section according to a first exemplary embodiment
- FIG. 2 shows a microphone in schematic cross section according to a second exemplary embodiment
- FIG. 3 shows a microphone in schematic cross section according to a third exemplary embodiment
- FIG. 4 shows a microphone converter, a sound guiding element and an integrated circuit in a perspective representation obliquely from above
- FIG. 5 shows the same arrangement in perspective
- FIG. 6 shows an exemplary embodiment in schematic form
- FIG. 1 shows the first embodiment in a schematic cross section through all the components of the microphone.
- a cavity housing is formed of a bottom plate BP and a cap-shaped cover AD, which is mounted on the top of the bottom plate by means of a fastening means BM.
- terms such as above or below refer to the arrangement in the figure, but nothing about the true spatial arrangement when using the microphone or with respect to its orientation in one
- the cap-shaped cover AD is glued or soldered, for example. In the latter case are on the bottom plate BP accordingly
- a microphone transducer for example a MEMS component designed as
- Condenser microphone a sound guide element SFE and an integrated circuit IC, which is designed as a chip mounted.
- the microphone transducer MW is mounted so that its membrane ME and thus also have the electrical connections facing down.
- the sound-conducting element SFE is arranged between the microphone converter MW and the integrated circuit IC.
- the sound guide element SFE and the microphone converter MW arranged close to each other.
- Microphone transducer, sound guide element and IC are with a laminating film, which serves as a separation AT between the pre-volume FV and back volume RV, sealed against the bottom plate BP ⁇ .
- the separation AT is applied after assembly of the three components and laminated, for example, with the aid of pressure and elevated temperature.
- the sound guide element SFE is a mechanically stable part, which has a sound channel inside.
- Sound channel has at the top at least one passage DL for the sound entrance and opens down in the direction
- Microphone converter MW The sound channel does not have to be closed except for the openings but can in the simplest case only consist of one or more side walls which open towards the microphone transducer MW.
- On the top of the sound guide element SFE is flat and provided with said passage.
- Microphone converter MW, sound guide element SFE and integrated circuit IC are arranged at any distance from each other, but small enough that at least the remaining gap between sound guide element SFE and microphone converter MW can be spanned by the separating film AT.
- the sound guide element SFE is dimensioned in its height above the bottom plate BP so that it is firmly clamped after closing the cavity housing between the cover and bottom plate BP, optionally in cooperation with the release liner, a cover layer and optionally a sealant such. an adhesive layer on top of the sound guide element.
- the microphone converter has a lower height and therefore no through the housing
- an opening OE is provided for the sound inlet, which is aligned with the passage DL on the upper side of the sound guide element SFE.
- the sound channel is sealed. Due to the voltage applied to the cover AD sound guide element, the seal can be done by the tightly against de cover AD fitting release film AT or optionally additionally by a sealing agent DM, for example a sealing ring.
- a sealing agent DM for example a sealing ring.
- the interior of the cavity housing is separated into a pre-volume FV and a return volume RV.
- the back volume RV extends between the
- Cavity volume is connected via the passage DF with the rest of the volume RV and is therefore added to this.
- the opening OE in the cover AD, the passage DL in the top of the sound guide element FE and the sound channel SK may have the same cross section and are arranged one above the other so that a continuous
- Sound entry only after the attachment of the cover D to produce for example by drilling, laser or etching.
- the exact sound transmission ie the path of an acoustic signal from outside the microphone through the opening OE to below the membrane of the microphone transducer MW is indicated in the figure by a dashed line with an arrow. If the sound guide element SFE has a sufficiently high acoustic cross section, no attenuation of the acoustic signal is to be expected despite sound diversion, so that the full functionality of the microphone is ensured. Because the return volume RV according to the invention is increased by the entire space below the cover AD, the microphone a high sensitivity combined with a high sensitivity
- the invention makes it possible to arrange the sound guide element SFE independently of the arrangement of the integrated circuit IC within the cavity housing, but preferably immediately adjacent to the microphone transducer MW.
- FIG. 2 shows an arrangement in which the microphone converter MW is arranged between the integrated circuit IC and the sound conducting element SFE.
- the laminate film used as a partition AT covers the three components mounted in the same way, sound guiding element SFE, microphone transducer MW and integrated circuit IC and closing them tightly against the base plate BP.
- FIG. 1 A third embodiment is shown in FIG. Here the integrated circuit IC is completely independent of
- Microphone transducer and sound guide element mounted on the base plate. This can be done after the application of the used as separation AT laminate film, if this is then removed locally at the mounting location of the integrated circuit IC again. It is also possible that used as a separation AT laminate film only via microphone converter MW and
- FIG. 4 shows a possible geometrical configuration of a sound guiding element SFE on the basis of a perspective view, which shows a view obliquely from above on the
- the microphone converter MW has a crystalline body, of which the in
- the sound guiding element SFE is designed as a molded part, which at the top is a planar surface with at least one, for example, two passages DL in the figure.
- the sound guide ⁇ element SFE has at least two side parts, with which it is mounted on the bottom plate BP.
- the sound guiding element SFE has a round, oval or otherwise shaped sound channel SK open in the direction of the microphone transducer MW.
- Figure 5 shows in the perspective view obliquely from below the exact shape of the sound channel, the below the plan top only of the semicircular curved
- FIG. 5 also shows the Lotbumps LB, on the bottom of microphone transducer, sound guide element and integrated circuit or the chip with the integrated
- Microphone converter MW and integrated circuit IC serve.
- the sound guide element SFE requires no electrical
- Connection but if it is made of metallic material, can be connected to ground potential.
- any further embodiments are possible in which the sound channel can also be closed tubular and only at the lower end in the direction of the membrane has an opening.
- a single passage DL or a single passage DL can also be provided.
- FIG. 6 shows a schematic cross section through an inventive microphone only schematically
- Base plate BP The pads of the bottom plate BP, on the microphone converter MW and integrated circuit IC
- a metallic cap can also be electrically connected by means of a via and connected to ground potential, for example, to allow a better electromagnetic shielding of the microphone.
- the housing design can be made very flexible. For example, if you specify a
- Microphone transducer so the MEMS component are intervened. Instead, only the simple and inexpensive sound guide element is adjusted. With the sound guide element and optionally an additional sealant DM, which may be a further cover film or an adhesive and / or a cover layer, height tolerances can easily be taken into account without the costly deep drawing tools for a metallic
- Sound guiding element preferably via at least one transverse web or a side wall, which it against such Stiffening loads.
- the sound guide element can also be formed in the shape of a bridge arch. Also, a cuboid with one or more communicating holes for the sound channel is possible.
- a stamping process can be used particularly cost.
- below the sound entrance opening OE up to the lower edge of the microphone transducer is preferably not less than 0.02 mm 2 , for example at 0.04 mm 2 and advantageously at a cross section of 0.08 mm 2 and more.
- the sound guide element for the production of the sound guide element under ⁇ different materials and methods are suitable. It is possible, for example, the sound guide element as a plastic ⁇ injection part, optionally with metallpumble ambiencem
- Silicon chip in which the corresponding sound channel and the passage are etched, can be used as a sound guide element.
- the sound guide element can also on the
- the invention is not limited to the few embodiments shown in the figures. Rather, it is clear that the exact configuration of the cavity housing as described above is not limited to a combination of flat bottom plate and cap-shaped cover, but can also be constructed as a trough-shaped bottom plate and flat lid formed as cover. Accordingly, sub-combinations of the details shown in the individual embodiments are to be regarded as further inventive embodiments, which, however, are not described separately in this combination.
- AT separation e.g. a foil
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016563466A JP6311800B2 (ja) | 2014-04-25 | 2015-02-18 | 拡大されたバックチャンバを備えたマイクロホンおよび製造方法 |
US15/126,863 US9854350B2 (en) | 2014-04-25 | 2015-02-18 | Microphone having increased rear volume, and method for production thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014105849.6 | 2014-04-25 | ||
DE102014105849.6A DE102014105849B3 (de) | 2014-04-25 | 2014-04-25 | Mikrofon mit vergrößertem Rückvolumen und Verfahren zur Herstellung |
Publications (1)
Publication Number | Publication Date |
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WO2015161940A1 true WO2015161940A1 (de) | 2015-10-29 |
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PCT/EP2015/053404 WO2015161940A1 (de) | 2014-04-25 | 2015-02-18 | MIKROFON MIT VERGRÖßERTEM RÜCKVOLUMEN UND VERFAHREN ZUR HERSTELLUNG |
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JP (1) | JP6311800B2 (de) |
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US10499161B2 (en) * | 2014-06-23 | 2019-12-03 | Tdk Corporation | Microphone and method of manufacturing a microphone |
US10065852B2 (en) * | 2016-09-26 | 2018-09-04 | Taiwan Semiconductor Manufacturing Company Ltd. | MEMS device and manufacturing method thereof |
DE102018203094B3 (de) * | 2018-03-01 | 2019-05-23 | Infineon Technologies Ag | MEMS-Baustein |
EP3680211B1 (de) * | 2019-01-10 | 2024-03-06 | TE Connectivity Solutions GmbH | Sensoreinheit und verfahren zum verbinden eines substrats und eines trägers |
US11399226B2 (en) * | 2019-07-12 | 2022-07-26 | Lg Electronics Inc. | Voice input apparatus |
WO2021010498A1 (ko) * | 2019-07-12 | 2021-01-21 | 엘지전자 주식회사 | 음성 입력 장치 |
CN112689041B (zh) * | 2020-12-22 | 2023-05-26 | 维沃移动通信有限公司 | 电子设备 |
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US20170094402A1 (en) | 2017-03-30 |
JP2017517938A (ja) | 2017-06-29 |
JP6311800B2 (ja) | 2018-04-18 |
US9854350B2 (en) | 2017-12-26 |
DE102014105849B3 (de) | 2015-09-17 |
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