CN216925890U - Waterproof barometer - Google Patents
Waterproof barometer Download PDFInfo
- Publication number
- CN216925890U CN216925890U CN202122922217.6U CN202122922217U CN216925890U CN 216925890 U CN216925890 U CN 216925890U CN 202122922217 U CN202122922217 U CN 202122922217U CN 216925890 U CN216925890 U CN 216925890U
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- Prior art keywords
- substrate
- sealant
- chip
- shell
- barometer
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- 239000000758 substrate Substances 0.000 claims abstract description 47
- 239000000565 sealant Substances 0.000 claims abstract description 42
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 13
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000000499 gel Substances 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 239000010931 gold Substances 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 229920006335 epoxy glue Polymers 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- -1 wherein Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 239000000047 product Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a waterproof barometer which comprises a packaging structure formed by a shell and a substrate, wherein an MEMS (micro electro mechanical System) chip and an ASIC (application specific Integrated Circuit) chip are arranged in the packaging structure, and sealant for covering the MEMS chip and the ASIC chip is filled in the packaging structure, wherein an extending part is arranged at one end of the shell, which is not fixed with the substrate, is of an annular structure, and part of the sealant is covered. The utility model can solve the problems that the traditional waterproof barometer is easy to cause the sealant to overflow to the upper end face of the shell, and the material throwing and the material sucking are easy to cause during the product assembly.
Description
Technical Field
The utility model relates to the technical field of barometers, in particular to a waterproof barometer.
Background
With the rise of wearable products such as watches and bracelets, barometers have become their indispensable standard and match devices for measuring the pressure difference of the product position. Due to the diversity and complexity of the environments in which end products having barometers are used, water or vapor may enter the barometer in many environments, thereby affecting the performance of the barometer.
At present, a waterproof barometer generally adopts a sealant for waterproofing, but the traditional waterproof barometer can cause damage to a rubber surface and foreign matters easily because the sealant is directly exposed in the air; in addition, as the upper end of the shell is not provided with a shielding part, the sealant is easy to overflow to the upper end surface of the shell; when the shell is pasted, the phenomena of material throwing and inclined absorption easily occur because the contact area between the upper end of the shell and the suction nozzle is small.
In order to solve the above problems, the present invention provides a novel waterproof barometer.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a waterproof barometer, so as to solve the problems that the conventional waterproof barometer is prone to sealant overflowing to the upper end surface of the housing, and material throwing and sucking deviation are prone to occur during product assembly.
The utility model provides a waterproof barometer, which comprises a packaging structure formed by a shell and a substrate, wherein an MEMS chip and an ASIC chip are arranged in the packaging structure, and a sealant for covering the MEMS chip and the ASIC chip is filled in the packaging structure,
an extension part is arranged at one end of the shell, which is not fixed with the substrate, the extension part is of an annular structure and covers part of the sealant.
In addition, the preferred structure is that the extension part comprises a main body part and a through hole positioned in the middle, wherein the space which is not filled with the sealant in the packaging structure is communicated with the outside through the through hole of the extension part.
In addition, the preferable structure is that the sealant is silicone gel.
In addition, it is preferable that an annular groove is provided on the inner wall of the housing, wherein,
the annular groove is used for accommodating the sealant and preventing the sealant from overflowing inside the packaging structure.
Further, it is preferable that a gas hole is provided in the substrate, and the gas hole communicates with the MEMS chip.
Further, it is preferable that the housing is adhesively fixed to the substrate by an adhesive, wherein,
the adhesive is silver paste, tin paste or epoxy glue.
Further, it is preferable that the MEMS chip is provided on the ASIC chip, the ASIC chip is provided on the substrate, and,
the MEMS chip and the ASIC chip are fixed on the ASIC chip and the substrate through silica gel respectively.
In addition, it is preferable that the MEMS chip and the ASIC chip are electrically connected to the ASIC chip and the substrate by gold wires, respectively.
In addition, the substrate is preferably a ceramic substrate or a PCB substrate.
In addition, it is preferable that a pad is further provided on the substrate, and the substrate is electrically connected to an external device through the pad.
According to the technical scheme, the extension part is arranged at the end, not fixed with the base plate, of the shell, the extension part is of an annular structure and covers part of the sealant, the extension part comprises a main body part and a through hole located in the middle, and the sealant is communicated with the outside through the through hole of the extension part. In the utility model, the extending part on the shell exposes a small part of the sealant in the air, thus reducing the damage of the surface of the sealant and foreign matters; the extending part is used for preventing the sealant from overflowing to the upper end face of the shell, and when a product is assembled, the shell is increased in adsorption area, so that the adsorption difficulty and the shell attaching difficulty are reduced, and the production line assembly difficulty is further reduced.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the utility model is more fully understood. In the drawings:
FIG. 1 is a first schematic view of a waterproof barometer according to an embodiment of the utility model;
fig. 2 is a schematic structural diagram of a waterproof barometer according to an embodiment of the utility model.
Wherein the reference numerals include: 1. the MEMS chip comprises a shell, 11, an extension part, 2, a substrate, 3, an MEMS chip, 4, an ASIC chip, 5, a first gold wire, 6, a second gold wire, 7 and sealant.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
Aiming at the problems that the traditional waterproof barometer is easy to cause sealant to overflow to the upper end face of the shell, and material throwing, material sucking and deviation sucking and the like are easy to occur during product assembly, the utility model provides a novel waterproof barometer.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to illustrate the structure of the waterproof barometer provided by the utility model, fig. 1 and 2 show the waterproof structure of the barometer from different angles. Specifically, FIG. 1 illustrates a waterproof barometer structure one, according to an embodiment of the utility model; fig. 2 shows a waterproof structure two of the barometer according to an embodiment of the utility model.
As shown in fig. 1 and fig. 2, the waterproof barometer provided by the present invention includes a package structure formed by a housing 1 and a substrate 2, wherein a MEMS chip 3 and an ASIC chip are disposed inside the package structure, 4 a sealant 7 is filled inside the package structure, and the sealant 7 covers the MEMS chip 3 and the ASIC chip 4, wherein an extension portion 11 is disposed at one end of the housing 1, which is not fixed to the substrate 2, the extension portion 11 is an annular structure and covers the sealant 7.
In an embodiment of the present invention, the extension portion 11 includes a main body portion and a through hole located in the middle, wherein the sealant is communicated with the outside through the through hole of the extension portion 11, that is: and the space which is not filled with the sealant in the packaging structure is communicated with the outside through the through hole of the extension part.
In the embodiment shown in fig. 1 and 2, the extension portion 11 on the housing 1 can cover part of the sealing compound, so that a small part of the sealing compound is exposed in the air, thereby reducing the damage of the compound surface and foreign matters, and the extension portion can also prevent the existing sealing compound from overflowing to the upper end surface of the housing; the area of shell and adsorption equipment has been increased in the setting of extension, and adsorption equipment (generally be the suction nozzle) avoids appearing throwing the material and inhales inclined to one side the phenomenon when adsorbing to reduced and adsorbed the degree of difficulty and pasted the shell degree of difficulty, and then further reduced and produced the line equipment degree of difficulty.
In the embodiment of the utility model, the sealant 7 is silicone gel, and the silicone gel 7 covers the MEMS chip 3, the ASIC chip 4, and the gold wires (the gold wires include a first gold wire 5 connecting the MEMS chip 3 and the ASIC chip 4, and a second gold wire 6 connecting the ASIC chip 4 and the substrate 2).
In the embodiment shown in fig. 1 and 2, the MEMS chip 3 and the ASIC chip 4 are electrically connected by a first gold wire 5, and the a ASIC chip 4 is electrically connected by a second gold wire 6 between the substrate 2, that is, signals of the MEMS chip 3 and the ASIC chip 4 are transmitted to the substrate 2 by gold wires.
In the embodiment of the present invention, a gas hole (not shown) is provided on the substrate 2, and the gas hole communicates with the MEMS chip. The silicone gel 7 is set as a first pressure-sensitive end, and the air hole is set as a second pressure-sensitive end. The MEMS chip 3 senses the pressure of the first pressure sensing end through the silicone gel 7, and the MEMS chip 3 senses the pressure of the second pressure sensing end through the air hole, so that the MEMS chip 3 obtains the pressure difference between the first pressure sensing end and the second pressure sensing end.
In the embodiment of the present invention, the housing 1 is bonded and fixed to the substrate 2 by an adhesive, where the adhesive is a silver paste, a tin paste, or an epoxy glue, preferably, the adhesive is a silver paste, and may also be a tin paste or an epoxy glue, and in practical applications, any one of the silver paste, the tin paste, or the epoxy glue is selected to bond and fix the housing 1 and the substrate 2 together according to needs.
The silicone gel 7 is filled into the shell through a port at one end of the shell 1, which is provided with the extension part 11, and protects the internal chips (the MEMS chip 3 and the ASIC chip 4) and the gold wires, so that the waterproof and anticorrosion effects are achieved.
In the embodiment shown in fig. 1 and 2, the MEMS chip 3 is disposed on the ASIC chip 3, the ASIC chip 4 is disposed on the substrate 2, and both the MEMS chip 3 and the ASIC chip 4 are fixed to the substrate 2 by silicone. In the embodiment of the present invention, the MEMS chip 3 and the ASIC chip 4 may be both disposed on the substrate 2, and the ASIC chip 4 is electrically connected to the substrate 2 through a gold wire, in practical application, the MEMS chip 3 may be disposed on the ASIC chip 4 or the MEMS chip 3 may be disposed on the substrate 2 as needed.
In the embodiment of the present invention, the substrate 2 may be a ceramic substrate or a PCB substrate, and preferably, the substrate 2 is a ceramic substrate having the characteristics of water resistance and corrosion resistance. A pad is also provided on the substrate 2, and the substrate is electrically connected to an external device through the pad.
In the embodiment shown in fig. 1, an annular groove is formed in the inner wall of the casing, wherein the annular groove is used for accommodating the sealant and preventing the sealant from overflowing out of the interior of the package structure. The design mode is as follows: the annular groove and the extension part are combined with each other, so that the overflow to the upper end surface of the shell can be better prevented. In the embodiment shown in fig. 2, no groove for preventing the sealant from overflowing is arranged on the inner wall of the shell, and even if no groove for preventing the sealant from overflowing is arranged, the sealant can be prevented from overflowing to the upper end face of the shell only through the extension part. In a specific application, a suitable structure (fig. 1 or fig. 2) is selected as the waterproof barometer according to actual conditions.
According to the waterproof barometer, the extending portion is arranged at the end, not fixed with the base plate, of the shell, the extending portion is of an annular structure and covers part of the sealant, the extending portion comprises the main body portion and the through hole located in the middle, and the sealant is communicated with the outside through the through hole of the extending portion. In the utility model, the extending part on the shell exposes a small part of the sealant in the air, thus reducing the damage of the surface of the sealant and foreign matters; the extending part is used for preventing the sealant from overflowing to the upper end face of the shell, and when a product is assembled, the shell is increased in adsorption area, so that the adsorption difficulty and the shell attaching difficulty are reduced, and the assembly difficulty of a production line is further reduced.
The waterproof barometer proposed according to the utility model is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the waterproof barometer proposed by the utility model described above without departing from the scope of the utility model. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. A waterproof barometer comprises a packaging structure formed by a shell and a substrate, wherein an MEMS chip and an ASIC chip are arranged inside the packaging structure, and sealant for covering the MEMS chip and the ASIC chip is filled inside the packaging structure,
an extending part is arranged at one end of the shell, which is not fixed with the substrate, the extending part is of an annular structure, and part of the sealant is covered.
2. The waterproof barometer of claim 1,
the extension part comprises a main body part and a through hole positioned in the middle, wherein the space which is not filled with the sealant in the packaging structure is communicated with the outside through the through hole of the extension part.
3. The waterproof barometer of claim 1,
the sealant is silicone gel.
4. The waterproof barometer of claim 1,
an annular groove is arranged on the inner wall of the shell, wherein,
the annular groove is used for accommodating the sealant and preventing the sealant from overflowing into the packaging structure.
5. The waterproof barometer of claim 3,
and the substrate is provided with an air hole, and the air hole is communicated with the MEMS chip.
6. The waterproof barometer of claim 1,
the shell is bonded and fixed with the substrate through an adhesive, wherein,
the adhesive is silver paste, tin paste or epoxy glue.
7. The waterproof barometer of claim 1,
the MEMS chip is disposed on the ASIC chip, the ASIC chip is disposed on the substrate, and,
the MEMS chip and the ASIC chip are fixed on the ASIC chip and the substrate respectively through silica gel.
8. The waterproof barometer of claim 1,
the MEMS chip and the ASIC chip are electrically connected with the ASIC chip and the substrate through gold wires respectively.
9. The waterproof barometer of claim 1,
the substrate is a ceramic substrate or a PCB substrate.
10. The waterproof barometer of claim 1,
and a bonding pad is also arranged on the substrate, and the substrate is electrically connected with an external device through the bonding pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122922217.6U CN216925890U (en) | 2021-11-25 | 2021-11-25 | Waterproof barometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122922217.6U CN216925890U (en) | 2021-11-25 | 2021-11-25 | Waterproof barometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216925890U true CN216925890U (en) | 2022-07-08 |
Family
ID=82249811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122922217.6U Active CN216925890U (en) | 2021-11-25 | 2021-11-25 | Waterproof barometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216925890U (en) |
-
2021
- 2021-11-25 CN CN202122922217.6U patent/CN216925890U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |