CN203368751U - Mems microphone - Google Patents
Mems microphone Download PDFInfo
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- CN203368751U CN203368751U CN 201320444614 CN201320444614U CN203368751U CN 203368751 U CN203368751 U CN 203368751U CN 201320444614 CN201320444614 CN 201320444614 CN 201320444614 U CN201320444614 U CN 201320444614U CN 203368751 U CN203368751 U CN 203368751U
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- Prior art keywords
- circuit board
- base plate
- mems microphone
- electrical connector
- mems
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- 239000007795 chemical reaction product Substances 0.000 claims description 21
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 241000218202 Coptis Species 0.000 description 2
- 235000002991 Coptis groenlandica Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 101001045744 Sus scrofa Hepatocyte nuclear factor 1-beta Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model discloses an MEMS microphone and relates to the acoustoelectric product technology field. The MEMS microphone comprises a base plate and an MEMS chip which is arranged on the base plate in a fastened manner, wherein a side, provided with the MEMS chip, of the base plate is provided with an outer shell; a place, corresponding to the inner cavity of the MEMS chip, of the base plate is provided with a sound hole; the outer side of the top part of the outer shell is provided with a first circuit board; a side, far away from the outer shell, of the first circuit board is provided with welding pads which are electrically connected with the MEMS microphone and a terminal product circuit board; the top part of the outer shell is provided with an open hole, an electric connection member is arranged in the outer shell, and the electric connection member runs through the open hole and is electrically connected with the base plate and the first circuit board. The MEMS microphone solves the technical problem that to realize convenience of installation and high acoustic performance at the same time is difficult for an MEMS microphone of the prior art. The MEMS microphone can be connected with a terminal product conveniently and is high in acoustic performance.
Description
Technical field
The utility model relates to the acoustic-electric product technical field, particularly a kind of MEMS microphone.
Background technology
Along with the develop rapidly of portable electronic terminal, as the microphone of the important acoustic element of portable electronic terminal, also constantly doing and improving.Be applied at present the MEMS(Micro-Electro-Mechanic System in portable electronic terminal) microphone mainly contains Bottom(sound hole and is positioned at bottom) type MEMS microphone and TOP(sound hole be positioned at top) type MEMS microphone.
As shown in Figure 1, Bottom type MEMS microphone comprises shell 20a and the base plate 10a be combined as a whole, the inboard of base plate 10a is provided with MEMS chip 30, the position of the inner chamber of the upper corresponding MEMS chip 30 of base plate 10a has sound hole 50a, and the outside of base plate 10a is provided with for being electrically connected to the pad 40 of MEMS chip 30 and end product circuit board.The rear operatic tunes of the MEMS microphone of this type is large, and the front operatic tunes is little, highly sensitive, and acoustical behavior is good.But the structural requirement to end product that it is installed is higher, needs the circuit board of end product also to be provided with perforate, for sound wave provides passage, therefore can not meet the topology requirement of some end products.
As shown in Figure 2, Top type MEMS microphone comprises shell 20b and the base plate 10b be combined as a whole, the inboard of base plate 10b is provided with MEMS chip 30, and the top of shell 20b is provided with sound hole 50b, and the outside of base plate 10b is provided with for being electrically connected to the pad 40 of MEMS chip 30 and end product circuit board.The front operatic tunes of the MEMS microphone of this type is large, and the rear operatic tunes is little, and its acoustical behavior is poorer than Bottom type MEMS microphone, but its structural requirement to end product need to not offered channel of acoustic wave the end of than on the circuit board of end product.
At present, some portable electronic terminal requires the MEMS microphone to have the acoustical behavior of Bottom type MEMS microphone, above-mentioned two kinds of MEMS microphones require again the MEMS microphone consistent with combination and the Top type MEMS microphone of end product, therefore all can't meet the requirement of this kind of portable electronic terminal.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of MEMS microphone, this MEMS microphone had both had the acoustical behavior of Bottom type MEMS microphone, the mounting means that there is again Top type MEMS microphone, can meet the requirement of the high acoustical behavior of portable electronic terminal, meet again its requirement easy to assembly simultaneously.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of MEMS microphone comprises base plate and be located in the MEMS chip on described base plate that the side that described base plate is provided with described MEMS chip is covered with shell, and on described base plate, the position of corresponding described MEMS chip inner chamber is provided with the sound hole; The outside of described cover top portion is provided with first circuit board, and described first circuit board is provided with for being electrically connected to the pad of described MEMS microphone and end product circuit board away from a side of described shell; The top of described shell is provided with perforate, in described shell, is provided with electrical connector, and described electrical connector is electrically connected to described base plate and described first circuit board through described perforate.
Wherein, between described electrical connection module and described shell, leave for being communicated with the space of the described electrical connector two rear flank operatic tunes.
Wherein, described electrical connector is provided with for being communicated with the through hole of the described electrical connector two rear flank operatic tunes.
As a kind of execution mode, described electrical connector is second circuit board, and the two ends of described second circuit board are electrically connected to described base plate and described first circuit board respectively.
As another kind of execution mode, described electrical connector is the first extension that described base plate stretches out to described first circuit board, and the end of described the first extension is electrically connected to described first circuit board.
As another execution mode, described electrical connector is the second extension that described first circuit board stretches out to described base plate, and the end of described the second extension is electrically connected to described base plate.
After having adopted technique scheme, the beneficial effects of the utility model are:
Because the outside of the cover top portion of the utility model MEMS microphone is provided with first circuit board, first circuit board is provided with for being electrically connected to the pad of MEMS microphone and end product circuit board away from a side of shell; The top of shell is provided with perforate, is provided with electrical connector in shell, and electrical connector is electrically connected to base plate and first circuit board through perforate.The pad be arranged on base plate in existing Bottom type MEMS microphone has been moved on on the first circuit board that is positioned at cover top portion, and be provided with perforate on shell, be provided with electrical connector in shell, by electrical connector, the base plate of MEMS microphone is electrically connected to pad, when the utility model MEMS microphone is installed, the circuit board of pad and end product is welded, now the sound hole of MEMS microphone is positioned at the end of MEMS microphone away from pad, so need on the circuit board of terminal, perforate not provide channel of acoustic wave, therefore consistent with the mounting means of Top type MEMS microphone, and structure and the acoustical behavior of Bottom type MEMS microphone have been retained, facilitated and being connected of end product, and met the requirement of the high acoustical behavior of end product.
Visible, the utility model MEMS microphone solved in the prior art MEMS microphone be difficult to meet simultaneously conveniently install, the high technical problem of acoustical behavior again.The utility model MEMS microphone is convenient to be connected with end product, has again higher acoustical behavior simultaneously.
The accompanying drawing explanation
Fig. 1 is the structural representation of Bottom type MEMS microphone in background technology;
Fig. 2 is the structural representation of Top type MEMS microphone in background technology;
Fig. 3 is the structural representation of the utility model MEMS microphone embodiment mono-;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the upward view of Fig. 3;
Fig. 6 is the A-A line cutaway view of Fig. 3;
Fig. 7 is the structural representation of the utility model MEMS microphone embodiment bis-;
Fig. 8 is the structural representation of the utility model MEMS microphone embodiment tri-;
In figure: 10a, base plate, 10b, base plate, 10c, base plate, 10d, base plate, the 12, first extension, 20a, shell, 20b, shell, 20c, shell, 30, the MEMS chip, 40, pad, 50a, sound hole, 50b, sound hole, 50c, sound hole, 60a, first circuit board, 60b, first circuit board, 62, the second extension, 70, second circuit board, 80, space.
Embodiment
Below in conjunction with drawings and Examples, further set forth the utility model.
Embodiment mono-:
As shown in Fig. 3, Fig. 4 and Fig. 5 are common, a kind of MEMS microphone, for rectangular configuration, comprise base plate 10c and be located in the MEMS chip 30 on base plate 10c, the side that base plate 10c is provided with MEMS chip 30 is covered with shell 20c, the tubular structure that shell 20c is an end opening, and the openend of shell 20c combines with base plate 10c, MEMS chip 30 is electrically connected to base plate 10c by two gold threads, and the position of upper corresponding MEMS chip 30 inner chambers of base plate 10c is provided with sound hole 50c.The outside at shell 20c top is provided with first circuit board 60a, and first circuit board 60a is provided with for being electrically connected to the pad 40 of MEMS microphone and end product circuit board away from the side of shell 20c.The position that MEMS chip 30 is avoided at the top of shell 20c is provided with perforate, be provided with electrical connector in shell 20c, electrical connector is second circuit board 70, one end of second circuit board 70 is fixed on base plate 10c, and be electrically connected to base plate 10c, the other end of second circuit board 70 is fixed through the perforate and the first circuit board 60a that are located at shell 20c top, and is electrically connected to first circuit board 60a.
As shown in Figure 6, leaving 80， space, space 80 between second circuit board 70 and shell 20c can be communicated with the rear operatic tunes of second circuit board 70 both sides, has guaranteed that the rear operatic tunes still has larger volume, thereby guarantees that the acoustical behavior of MEMS microphone is constant.Fig. 6 only shows a kind of structure of electrical connector, in practical application, electrical connector can have the various structures form, as offered through hole or offer groove etc. in the end of electrical connector in the centre position at electrical connector, as long as the rear operatic tunes of electrical connector both sides can be communicated with.
As shown in Figure 3, shell 20c is metal shell, and metal shell has good shield effectiveness, can reduce interference, promotes the acoustical behavior of MEMS microphone.
As shown in Figure 3, base plate 10c and first circuit board 60a are PCB(Printed Circuit Board), second circuit board 70 is PCB or FPCB(Flexible Printed Circuit Board).
As shown in Figure 3, be equipped with circuit structure on base plate 10c, first circuit board 60a and second circuit board 70, as for concrete circuit structure, be not invention main points of the present utility model, and circuit those skilled in the art of this kind of simple electric connection mode can design multiple easily, therefore no longer describe in detail inferior.
As shown in Figure 3, the operation principle of the present embodiment MEMS microphone is as follows:
Sound wave enters through sound hole 50c, and act on the vibrating diaphragm of MEMS chip 30, vibrating diaphragm vibrates along with the power of sound wave, MEMS chip 30 is converted to the vibration of the different amplitudes of vibrating diaphragm the signal of telecommunication of variation, the signal of telecommunication is transferred to end product by gold thread, base plate 10c, second circuit board 70, first circuit board 60a and pad 40, thereby completes the conversion of acoustic-electric.After the utility model MEMS microphone is installed on end product, its sound hole 50c is away from the circuit board of end product, end product need to perforate not provide channel of acoustic wave for it on circuit board, therefore its mounting means is consistent with the mounting means of Top type MEMS microphone of the prior art, can be connected with end product very easily; Because the utility model MEMS microphone has the little design feature of large, the front operatic tunes of the rear operatic tunes, therefore have equally the acoustical behavior of Bottom type MEMS microphone, have the advantages such as sensitivity height again, acoustical behavior is high.Thereby the utility model MEMS microphone has the acoustical behavior technical characterstic high, easy for installation of portable electronic terminal requirement.
Embodiment bis-:
As shown in Figure 7, present embodiment and embodiment mono-are basic identical, and its difference is:
Electrical connector is that the first extension 12, the first extensions 12 of stretching out to first circuit board 60a of base plate 10d are perpendicular with base plate 10d, and the end of the first extension 12 and first circuit board 60a are fixed as one, and are electrically connected to first circuit board 60a.
Present embodiment is compared with embodiment mono-, and its structure is more simple, and processing technology thereof is easy.
Embodiment tri-:
As shown in Figure 8, present embodiment and embodiment mono-are basic identical, and its difference is:
Electrical connector is that the second extension 62, the second extensions 62 of stretching out to base plate 10c of first circuit board 60b are vertical with first circuit board 60b, and the end of the second extension 62 and base plate 10c are fixed as one, and are electrically connected to base plate 10c.
Present embodiment is compared with embodiment mono-, and its structure is more simple, and processing technology thereof is easy.
Base plate and second circuit board in the utility model, second circuit board and first circuit board, base plate and fixed form between first circuit board can adopt welding, bonding, joggle or buckle to be connected etc.
" first circuit board " named in the utility model and " second circuit board " are just the difference technical characterictic, do not represent erection sequence between the two and job order etc.
" the first extension " named in the utility model and " the second extension " are just the difference technical characterictic, do not represent erection sequence between the two and job order etc.
The technical scheme that the utility model is converted to Top type MEMS microphone by Bottom type MEMS microphone not merely is applicable to above-described embodiment, above-described embodiment just describes in detail for the MEMS microphone of rectangle, in practical application, this technical scheme is equally applicable in the MEMS microphone of circle, track type or round rectangle, those skilled in the art do not need to pay creative work and just the technical program can be transplanted in the MEMS microphone of above-mentioned shape, therefore be not described in detail in this.
The utility model is not limited to above-mentioned concrete execution mode, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done, within all dropping on protection range of the present utility model.
Claims (6)
1.MEMS microphone comprises base plate and be located in the MEMS chip on described base plate that the side that described base plate is provided with described MEMS chip is covered with shell, on described base plate, the position of corresponding described MEMS chip inner chamber is provided with the sound hole; It is characterized in that, the outside of described cover top portion is provided with first circuit board, and described first circuit board is provided with for being electrically connected to the pad of described MEMS microphone and end product away from a side of described shell; The top of described shell is provided with perforate, in described shell, is provided with electrical connector, and described electrical connector is electrically connected to described base plate and described first circuit board through described perforate.
2. MEMS microphone according to claim 1, is characterized in that, between described electrical connector and described shell, leaves for being communicated with the space of the described electrical connector two rear flank operatic tunes.
3. MEMS microphone according to claim 1, is characterized in that, described electrical connector is provided with for being communicated with the through hole of the described electrical connector two rear flank operatic tunes.
4. according to the described MEMS microphone of claim 2 or 3, it is characterized in that, described electrical connector is second circuit board, and the two ends of described second circuit board are electrically connected to described base plate and described first circuit board respectively.
5. according to the described MEMS microphone of claim 2 or 3, it is characterized in that, described electrical connector is the first extension that described base plate stretches out to described first circuit board, and the end of described the first extension is electrically connected to described first circuit board.
6. according to the described MEMS microphone of claim 2 or 3, it is characterized in that, described electrical connector is the second extension that described first circuit board stretches out to described base plate, and the end of described the second extension is electrically connected to described base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320444614 CN203368751U (en) | 2013-07-24 | 2013-07-24 | Mems microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320444614 CN203368751U (en) | 2013-07-24 | 2013-07-24 | Mems microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368751U true CN203368751U (en) | 2013-12-25 |
Family
ID=49816462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320444614 Expired - Lifetime CN203368751U (en) | 2013-07-24 | 2013-07-24 | Mems microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107295449A (en) * | 2017-06-23 | 2017-10-24 | 深圳天珑无线科技有限公司 | A kind of method for packing of microphone assembly, mobile terminal and microphone assembly |
-
2013
- 2013-07-24 CN CN 201320444614 patent/CN203368751U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107295449A (en) * | 2017-06-23 | 2017-10-24 | 深圳天珑无线科技有限公司 | A kind of method for packing of microphone assembly, mobile terminal and microphone assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20200611 Address after: 266104 room 103, 396 Songling Road, Laoshan District, Qingdao, Shandong Province Patentee after: Goer Microelectronics Co.,Ltd. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: GOERTEK Inc. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
|
| CX01 | Expiry of patent term |