CN201328182Y - Microphone diaphragm and electret condenser microphone - Google Patents

Microphone diaphragm and electret condenser microphone Download PDF

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Publication number
CN201328182Y
CN201328182Y CNU2008201764440U CN200820176444U CN201328182Y CN 201328182 Y CN201328182 Y CN 201328182Y CN U2008201764440 U CNU2008201764440 U CN U2008201764440U CN 200820176444 U CN200820176444 U CN 200820176444U CN 201328182 Y CN201328182 Y CN 201328182Y
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CN
China
Prior art keywords
layer
organic
microphone
vibrating membrane
diaphragm
Prior art date
Application number
CNU2008201764440U
Other languages
Chinese (zh)
Inventor
姜滨
姚荣国
刘忠远
王显彬
党茂强
姚邵阳
Original Assignee
歌尔声学股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 歌尔声学股份有限公司 filed Critical 歌尔声学股份有限公司
Priority to CNU2008201764440U priority Critical patent/CN201328182Y/en
Application granted granted Critical
Publication of CN201328182Y publication Critical patent/CN201328182Y/en

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Abstract

The utility model relates to a microphone diaphragm and an electret condenser microphone, which comprises an organic material layer using as the base, and is characterized in that metal layers are respectively arranged on the two sides of the organic material layer. The utility model can avoid the direct contact of the organic material layer of the diaphragm with an electret layer of a back plate through arranging the metal layers on the two faces of the organic material layer, in order to avoid the charge loss of the back plate, and the metal layer has higher stability than the diaphragm under high temperature, which can greatly avoid the charge loss of the back plate. Therefore, through adopting the diaphragm whose organic material layer is provided with the metal layers on the two faces, not only the electret has more stability, but also the weakness of poor mechanical performance of the diaphragm made of metal can be overcome, and the stability of the electret condenser microphone is greatly increased under the high temperature environment in the installation and use processes.

Description

Microphone is with vibrating membrane and electret capacitor microphone
Technical field
The utility model relates to a kind of microphone with vibrating membrane and electret capacitor microphone.
Background technology
In recent years, on the electronic products such as mobile phone, earphone, electret capacitor microphone cheap, superior performance is widely used.The core devices of electret capacitor microphone is oppositely arranged the sound-electric transition components of forming by a back pole plate and a vibrating membrane, one side of the close vibrating membrane of back pole plate is provided with electret layer and is used for storing electric charge, vibrating membrane and back pole plate form certain interval and realize and can vibrate that these have become technique known in the industry.
Wherein the design of vibrating membrane is the key factor that influences the electret capacitor microphone performance, application number is the design that the Chinese patent of CN02127323.5 has embodied a kind of vibrating membrane, as shown in Figure 1, this vibrating membrane with layer of metal layer 10 by evaporation process attached on one deck organic film 9, become an electrode, metal level 10 sticks on the becket 71, thereby vibrating membrane can be realized vibrating, the function of ground connection.This also is vibrating membrane design general in the present industry with layer of metal attached to the design on one deck organic film.
Yet, this electret capacitor microphone of this vibrating membrane that is equipped with is in the process welded and installed process of high temperature, the electric charge of storing in the electret on the back pole plate is very easy to scatter and disappear, especially be attracted to back pole plate (claiming this phenomenon to be " suction film " in the industry) when going up at vibrating membrane, organic film on the vibrating membrane takes place directly to contact with the back pole plate electret layer, thereby cause the loss of charge on the back pole plate, because the surface mount product needed is through a high-temperature soldering process that surpasses 200 degrees centigrade, this problem is especially obvious under hot conditions, because under the hot conditions, the electric charge activity is more active, like this, organic thin film layer contact back pole plate can cause the loss speed of electric charge on the back pole plate electret faster, causes the decline of product stability.
The utility model content
The utility model has overcome above-mentioned shortcoming, and the microphone that a kind of simple in structure, stable performance is provided is with vibrating membrane and electret capacitor microphone.
The technical scheme in the invention for solving the technical problem is: a kind of microphone vibrating membrane comprises that the both sides of described organic material layer are provided with metal level as the organic material layer on basis.
The thickness of described organic material layer can be 0.0005~0.01mm.
Described metal layer thickness can be 0.0001~0.001mm.
Two metal layer thickness of described organic material layer both sides can be identical.
Described metal layer thickness can be 1/2~1/20 of an organic material layer thickness.
A kind of electret capacitor microphone comprises the back pole plate and the vibrating membrane that are oppositely arranged composition sound-electric transition components, and described vibrating membrane adopts above-mentioned microphone vibrating membrane.
The utility model all is provided with metal level by the two sides at the organic material layer of vibrating membrane, can avoid the vibrating membrane organic material layer to contact with the direct of back pole plate electret layer, thereby avoid the loss of charge on the back pole plate, and metal level stability at high temperature surpasses the vibrating diaphragm organic layer, can avoid this situation significantly.Therefore, adopt the two sides of this organic material layer that the vibrating membrane of metal level all is set by the utility model, not only make electret have better stability, also avoided simultaneously only adopting the bad shortcoming of diaphragm mechanical performance of metal making, and can be in installation, use, especially under hot environment, the stability of electret capacitor microphone significantly improves.
Description of drawings
Fig. 1 is the application structure schematic diagram of original vibrating membrane;
Fig. 2 is the structural representation of electret capacitor microphone in the utility model;
Fig. 3 is the local enlarged diagram of back pole plate and vibrating membrane among Fig. 2.
Embodiment
As shown in Figure 2, present embodiment is a kind of electret capacitor microphone that can realize that paster is installed.With prior art approximate be, electret capacitor microphone comprises: a wiring board substrate 1 and the protection structure that flute profile metal shell 2 constitutes, wherein the arranged outside of wiring board substrate 1 has a plurality of electrodes 11 that can realize that paster is installed, the inboard is provided with signal amplifying apparatus 12, and the bottom of shell 2 is provided with the sound hole 21 that is used to receive the external sound signal; Described protection inside configuration is equipped with dead ring 3, and dead ring 3 inside are equipped with becket 4, back pole plate 5, shading ring 6, vibration ring 7 successively and are installed in the vibrating membrane 8 that vibrates on the ring 7, and described back pole plate 5 and vibrating membrane 8 are oppositely arranged composition sound-electric transition components.
As shown in Figure 3, described back pole plate 5 is made of the electret layer 52 of metallic plate 51 and storage electric charge, and wherein electret layer 52 is near vibrating membrane 8 one sides.And vibrating membrane 8 comprises the organic material layer 82 of middle part as basal layer, and described organic material layer 82 both sides are respectively arranged with metal level 81 and 83.Wherein organic material layer can vibrate according to it, different performances such as extension, heatproof select to adopt a kind of among PTFE, FEP, ETFE, PFA, PVE, PP, PVC, PET, the PPS; The thickness of organic material layer mainly requires to select according to the difference of vibration sensitivity, and thickness range is generally 0.0005-0.01mm; Described metal level can carry out the selection of material and thickness according to different requirements, adopts a kind of in gold, nickel, chromium, titanium, the aluminium; The described metal layer thickness of metal layer thickness is 1/2~1/20 of an organic material layer thickness, is generally less than 0.001mm.
Two metal levels of described organic material layer both sides can adopt identical thickness, have equal intensity and stability with the both sides that guarantee vibrating membrane, also are convenient to install.
Rely on this design, in installation, use, the stability of electret capacitor microphone significantly improves.The product of kind especially is installed at automatic chip mounting,, and is selected the intermediate layer of resistant to elevated temperatures organic material, select suitable thickness and outer layer metal, can significantly improve the stability and the reliability of product as vibrating membrane by this design.
More than microphone provided by the utility model is described in detail with vibrating membrane and electret capacitor microphone, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims (6)

1. a microphone vibrating membrane comprises that it is characterized in that: the both sides of described organic material layer are provided with metal level as the organic material layer on basis.
2. microphone vibrating membrane according to claim 1 is characterized in that: the thickness of described organic material layer is 0.0005~0.01mm.
3. microphone vibrating membrane according to claim 1 is characterized in that: described metal layer thickness is 0.0001~0.001mm.
4. microphone vibrating membrane according to claim 1 is characterized in that: two metal layer thickness of described organic material layer both sides are identical.
5. microphone vibrating membrane according to claim 1 is characterized in that: described metal layer thickness is 1/2~1/20 of an organic material layer thickness.
6. an electret capacitor microphone comprises the back pole plate and the vibrating membrane that are oppositely arranged composition sound-electric transition components, and described vibrating membrane adopts as the microphone vibrating membrane described in the claim 1~6 each.
CNU2008201764440U 2008-12-03 2008-12-03 Microphone diaphragm and electret condenser microphone CN201328182Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008201764440U CN201328182Y (en) 2008-12-03 2008-12-03 Microphone diaphragm and electret condenser microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008201764440U CN201328182Y (en) 2008-12-03 2008-12-03 Microphone diaphragm and electret condenser microphone

Publications (1)

Publication Number Publication Date
CN201328182Y true CN201328182Y (en) 2009-10-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008201764440U CN201328182Y (en) 2008-12-03 2008-12-03 Microphone diaphragm and electret condenser microphone

Country Status (1)

Country Link
CN (1) CN201328182Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102938871A (en) * 2012-10-31 2013-02-20 深圳市豪恩声学股份有限公司 Piezoelectric electret microphone and piezoelectric electret film thereof
CN105578356A (en) * 2016-01-01 2016-05-11 苏州井利电子股份有限公司 Moisture-resistant paper cone for loudspeaker
CN108989959A (en) * 2018-08-09 2018-12-11 京东方科技集团股份有限公司 Electret microphone and its manufacturing method, display device
CN111200779A (en) * 2019-12-18 2020-05-26 歌尔微电子有限公司 Electret microphone and electronic device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102938871A (en) * 2012-10-31 2013-02-20 深圳市豪恩声学股份有限公司 Piezoelectric electret microphone and piezoelectric electret film thereof
CN105578356A (en) * 2016-01-01 2016-05-11 苏州井利电子股份有限公司 Moisture-resistant paper cone for loudspeaker
CN108989959A (en) * 2018-08-09 2018-12-11 京东方科技集团股份有限公司 Electret microphone and its manufacturing method, display device
CN108989959B (en) * 2018-08-09 2020-11-10 京东方科技集团股份有限公司 Electret microphone, manufacturing method thereof and display device
CN111200779A (en) * 2019-12-18 2020-05-26 歌尔微电子有限公司 Electret microphone and electronic device

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Granted publication date: 20091014