CN213126974U - Membrane and circuit board - Google Patents
Membrane and circuit board Download PDFInfo
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- CN213126974U CN213126974U CN202021486556.3U CN202021486556U CN213126974U CN 213126974 U CN213126974 U CN 213126974U CN 202021486556 U CN202021486556 U CN 202021486556U CN 213126974 U CN213126974 U CN 213126974U
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Abstract
The utility model discloses a membrane and circuit board, wherein the membrane includes: a first contrast layer; a second contrast layer located on one side of the first contrast layer; wherein the grey scale value of the color of the first contrast layer is greater than the grey scale value of the color of the second contrast layer. The utility model provides a membrane and circuit board to the realization sets up the identification code on the membrane, thereby improves definition and the resolution ratio of identification code.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a membrane and circuit board.
Background
With the rapid development of the electronic industry, electronic products are further developed toward miniaturization, light weight and high-density assembly, which greatly promotes the development of flexible circuit boards and gradually realizes the integration of component devices and wire connection. The flexible circuit board can be widely applied to industries such as mobile phones, liquid crystal display, communication, aerospace and the like.
Among present electronic product, various components and parts have been integrateed to electronic product's inside, for this electronic product of better traceing back or the inside certain components and parts of better traceing back electronic product, often be provided with the identification code in electronic product, through sweeping this identification code of sign indicating number, can carry out electronic product or the information of its inside certain unitary device and trace back.
In the prior art, an identification code (for example, a two-dimensional code) is printed on a steel plate, but the size of the steel plate is limited due to the lightness and thinness of an electronic product, so that the two-dimensional code is not easy to print on the steel plate. In the prior art, the identification code can be printed on a soft board of an electronic product in a printing mode, but the printed identification code is not clear due to the small size of the soft board, the accuracy cannot meet the identification requirement, and the condition that the identification code cannot be printed on the soft board with the small size exists.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a membrane and circuit board to the realization sets up the identification code on the membrane, thereby improves definition and the resolution ratio of identification code.
In a first aspect, an embodiment of the present invention provides a membrane, including: a first contrast layer;
a second contrast layer located on one side of the first contrast layer;
wherein the grey scale value of the color of the first contrast layer is greater than the grey scale value of the color of the second contrast layer.
In a second aspect, the embodiments of the present invention further provide a membrane, including: a first contrast layer;
a second contrast layer located on one side of the first contrast layer;
wherein the grey scale value of the color of the first contrast layer is greater than the grey scale value of the color of the second contrast layer; the first contrast layer forms hollow patterns of the identification codes.
The third aspect, the embodiment of the present invention further provides a circuit board, including: printed circuit board and the film provided by any embodiment of the present invention; a glue film layer is arranged on one side, away from the first contrast layer, of the second contrast layer of the film; one side of the glue layer of the film is attached to the printed circuit board.
In a fourth aspect, the embodiment of the present invention further provides a circuit board, including: a printed circuit board, an electromagnetic shielding layer and a film provided by any embodiment of the present invention; a glue film layer is arranged on one side, away from the first contrast layer, of the second contrast layer of the film; the electromagnetic shielding layer is attached to the printed circuit board; one side of the glue layer of the film is attached to one side of the electromagnetic shielding layer far away from the printed circuit board.
The utility model discloses in, the membrane includes first contrast layer to and set up in the second contrast layer of first contrast layer one side. And the gray value of the color of the first contrast layer is larger than that of the color of the second contrast layer, so that obvious bright-dark brightness contrast is formed between the first contrast layer and the second contrast layer. The embodiment can form the hollow-out pattern of the identification code by the first contrast layer, so that the identification code with higher definition can be obtained under the strong contrast of the brightness and the color of the first contrast layer and the second contrast layer, and the identification precision and the accuracy of the identification code by a user are improved. The film of the present embodiment can be attached to components and electronic products, thereby facilitating tracing of the components or electronic products through identification codes.
Drawings
Fig. 1 is a schematic structural diagram of a membrane provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another membrane provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another circuit board provided in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the utility model provides a membrane, include: a first contrast layer;
a second contrast layer located at one side of the first contrast layer;
the gray value of the color of the first contrast layer is larger than the gray value of the color of the second contrast layer.
The embodiment of the present invention provides a gray scale value of the color of the first contrast layer is greater than that of the second contrast layer, and after the identification code is formed, the device can identify the colors of the first contrast layer and the second contrast layer and further process the identified codes to form a clear and recognizable identification code.
In an embodiment of the present invention, the film includes a first contrast layer and a second contrast layer disposed on one side of the first contrast layer. And the gray value of the color of the first contrast layer is larger than that of the color of the second contrast layer, so that obvious bright-dark brightness contrast is formed between the first contrast layer and the second contrast layer. The embodiment can form the hollow-out pattern of the identification code by the first contrast layer, so that the identification code with higher definition can be obtained under the strong contrast of the brightness and the color of the first contrast layer and the second contrast layer, and the identification precision and the accuracy of the identification code by a user are improved. The film of the present embodiment can be attached to components and electronic products, thereby facilitating tracing of the components or electronic products through identification codes.
Above is the core thought of the utility model, will combine the attached drawing in the embodiment of the utility model below, to the technical scheme in the embodiment of the utility model clearly, describe completely. Based on the embodiments in the present invention, under the premise that creative work is not done by ordinary skilled in the art, all other embodiments obtained all belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a film according to an embodiment of the present invention, and as shown in fig. 1, the film in this embodiment includes a first contrast layer 13 and a second contrast layer 12 sequentially disposed. In the present embodiment, the gradation value of the color of the first contrast layer 13 is larger than the gradation value of the color of the second contrast layer 12. The first contrast layer 13 is used to form a distinct color or brightness difference with the second contrast layer 12, and the gray scale value of the color of the first contrast layer 13 is greater than the gray scale value of the color of the second contrast layer 12. The present embodiment uses the gray scale parameter to convert the color of the color into high quality gray scale gradient to detect the contrast of the brightness of the first contrast layer 13 and the second contrast layer 12. The gray scale uses black tone to represent various colors, that is, black is used as a reference color, and different colors are displayed by black with different saturation. And dividing black and white into 0-255 gray levels. The gray value of white is 255, the gray value of black is 0, and in this embodiment, the gray value of the color of the first contrast layer 13 is defined to be greater than the gray value of the color of the second contrast layer 12, so that if the hollow-out pattern of the identification code is formed on the first contrast layer 13, the bright-dark contrast between the first contrast layer 13 and the second contrast layer 12 can form a clear and easily-recognized identification code, and the recognition accuracy and the precision of the identification code by the user are improved. Optionally, the hollow-out pattern of the identification code may be formed by laser ablation, for example, the hollow-out pattern may be ablated by ultraviolet laser and carbon dioxide laser.
Fig. 2 is a schematic structural diagram of another membrane provided in an embodiment of the present invention, and optionally, the membrane of this embodiment may further include: a glue layer 11; the glue layer 11 is arranged on the side of the second contrast layer 12 far away from the first contrast layer 13. The glue layer 11 is arranged on the side of the second contrast layer 12 far away from the first contrast layer 13. The first contrast layer 13 of the film is used for forming hollow patterns of identification codes for users to recognize. In this embodiment, the adhesive layer 11 may be disposed on a side of the second contrast layer 12 away from the first contrast layer 13, and the position of the film is fixed without affecting the exposure of the identification code. The glue layer 11 is used to protect the first and second contrast layers 13 and 12. Alternatively, in this embodiment, the adhesive layer 11 may include at least one of a thermosetting adhesive and a thermoplastic adhesive, where the thermosetting adhesive is a kind of adhesive that can form a chemical bond under the action of a thermal catalyst alone or in combination, and the thermosetting adhesive is not melted or dissolved after being cured. Specifically, the thermosetting adhesive in this embodiment may include at least one of phenol formaldehyde, urea formaldehyde, melamine, epoxy, polyurethane, acrylate, unsaturated polyester, and silicone. Alternatively, the adhesive layer 11 may be white or colorless, and the specific color of the adhesive layer 11 is not limited in this embodiment. In this embodiment, the adhesive layer 11 can be used to adhere and fix the film to other structural layers and other components.
Preferably, it can be defined that the grey value of the color of the first contrast layer 13 differs more from the grey value of the color of the second contrast layer 12. For example, the first contrast layer 13 is light gray in color, and the gray value of light gray is larger, so that the light gray of the first contrast layer 13 is clearly contrasted with the dark color of the second contrast layer 12. Alternatively, the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 may be greater than or equal to a first grayscale threshold; the first grayscale threshold is greater than or equal to 10. The difference value between the gray scale value of the color of the first contrast layer 13 and the gray scale value of the color of the second contrast layer 12 is at least 10, so that a relatively obvious light and shade difference is formed between the second contrast layer 12 and the first contrast layer 13, and the accuracy of the identification code identification device in identifying the identification code formed by the second contrast layer 12 and the first contrast layer 13 is improved.
In order to further increase the brightness difference between the first contrast layer 13 and the second contrast layer 12, the first grayscale threshold value may be defined as 50, and the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 is at least 50, the color brightness of the first contrast layer 13 is stronger, the color brightness of the second contrast layer 12 is smaller, the light-dark contrast between the second contrast layer 12 and the first contrast layer 13 is further increased, and the identification precision and accuracy of the identification code are improved.
On the basis of the above embodiment, in this embodiment, it may be further defined that the first grayscale threshold is 100, the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 is at least 100, the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 is greater than or equal to 100 and less than or equal to 255, and the color brightness of the first contrast layer 13 is greater. For example, if the gray-scale value of the color of the second contrast layer 12 is 0, the gray-scale value of the color of the first contrast layer 13 is different from the gray-scale value of the color of the second contrast layer 12 by at least 100, even 255, the gray-scale value of the first contrast layer 13 may be selected to be greater than or equal to 100. In the case of the difference between the gray values of 255, one of the second contrast layer 12 and the first contrast layer 13 is pure black, and the other is pure white, i.e. the gray values of the two are 255 and 0, the difference between the brightness and the color is large, and the definition of the identification code is further enhanced.
In this embodiment, the second contrast layer 12 is a film layer with a darker color and a smaller gray value than the first contrast layer 13, and optionally, the second contrast layer 12 may include at least one of epoxy resin, rubber, modified epoxy resin, polyimide, polyurethane resin, acrylic resin, modified acrylic resin, polyester, polyphenylene sulfide, polyethylene glycol terephthalate, and liquid crystal polymer.
The second contrast layer 12 is preferably black or a color having a gray value closer to black, such as dark blue, and the second contrast layer 12 includes at least one of epoxy resin, rubber, modified epoxy resin, polyimide, polyurethane resin, acrylic resin, modified acrylic resin, polyester, polyphenylene sulfide, polyethylene glycol terephthalate, and liquid crystal polymer, and in this embodiment, at least one of the above materials is mixed by adding other materials to form a dark color having a lower gray value.
Alternatively, the second contrast layer 12 may be black in color; the second contrast layer 12 may be at least one of black polyimide and black ink. The water-gas blocking effect of the black polyimide is good, the black ink has a strong flame-retardant effect, the second contrast layer 12 can be set to be the black polyimide material or the black ink material, and in addition, the second contrast layer 12 can simultaneously comprise the black polyimide and the black ink. The second contrast layer 12 forms a distinct color contrast with the first contrast layer 13 and protects the electronic device or component to which it is attached.
The first contrast layer 13 is used for contrasting with the second contrast layer 12, and optionally, the first contrast layer 13 comprises at least one of modified epoxy resins, modified acrylic resins, modified rubber resins, modified thermoplastic polyimides, modified polyesters, thermoplastic resins, thermosetting resins, and pressure-sensitive adhesives. In the embodiment, at least one of the above materials is mixed by adding other materials to form a light color with a high gray value, such as yellow, beige, light gray, etc. Alternatively, the first contrast layer 13 may be at least one of a white glue layer or a white ink layer. The gray value of the color of the first contrast layer 13 is 255 and the gray value of the color of the second contrast layer 12 is preferably 0, the contrast between black and white is stronger, and a clearer identification code is easily formed. In addition, the adhesive layer or the ink layer may also be a color with a lower gray value, such as gray, yellow, etc., which is not limited in this embodiment.
Alternatively, the thickness of the first and second contrast layers 13 and 12 may range from 2 to 25 μm. Preferably, in order to adapt to the thinning trend of electronic products, the thickness range of the first contrast layer 13 and the second contrast layer 12 is 2 μm to 8 μm, so as to reduce the thickness of the whole film as much as possible, optionally, the thickness of the first contrast layer 13 and the thickness of the second contrast layer 12 can be respectively selected to be 3.5 μm, and the first contrast layer 13 and the second contrast layer 12 are thinned while ensuring that the identification code hollow patterns can be formed by etching.
It should be noted that when the membrane that provides sets up the identification code through this implementation to electronic product or components and parts, can pass through the glue film with the membrane and attach to the sculpture that carries out the fretwork figure of identification code again behind corresponding electronic product or components and parts, perhaps also can carry out the membrane and carry out the sculpture back of the fretwork figure of identification code, the rethread glue film is attached to corresponding electronic product or components and parts, this embodiment does not prescribe a limit to this.
In the present embodiment, the second contrast layer 12 may also be a ferrous metal, such as a simple metal of iron, chromium, or manganese, or an alloy thereof, for example, ferrous metal iron and an alloy thereof, such as steel, pig iron, an iron alloy, cast iron, etc., in which case the first contrast layer 13 may be at least one of a white glue layer or a white ink, so that there is a distinct brightness difference between the first contrast layer 13 and the second contrast layer 12.
With continued reference to fig. 1, embodiments of the present invention further provide a membrane, including: a first contrast layer 13;
a second contrast layer 12 located on one side of the first contrast layer 13;
wherein the gray value of the color of the first contrast layer 13 is greater than the gray value of the color of the second contrast layer 12; the first contrast layer 13 forms a hollowed-out pattern of the identification code.
In an embodiment of the present invention, the film includes a first contrast layer and a second contrast layer disposed on one side of the first contrast layer. And the gray value of the color of the first contrast layer is larger than that of the color of the second contrast layer, so that obvious bright-dark brightness contrast is formed between the first contrast layer and the second contrast layer. The embodiment can form the hollow-out pattern of the identification code by the first contrast layer, so that the identification code with higher definition can be obtained under the strong contrast of the brightness and the color of the first contrast layer and the second contrast layer, and the identification precision and the accuracy of the identification code by a user are improved. The film of the present embodiment can be attached to components and electronic products, thereby facilitating tracing of the components or electronic products through identification codes.
Alternatively, the identification code may include at least one of a bar code, a two-dimensional code, and a character. The identification code is a unique corresponding identification mark for identifying the component or the electronic product. The identification code may include figures of characters such as numbers and letters, and may also be a bar code or a two-dimensional code, and the film of this embodiment may include at least one of the above-mentioned bar code, two-dimensional code and characters to identify a corresponding component or electronic product. Exemplarily, the membrane can be attached to a printed circuit board of the electronic equipment, the identification codes of the components can be arranged at positions corresponding to the components on the membrane, and the plurality of identification codes and the plurality of components can be arranged in a one-to-one correspondence manner, so that the problem that the printed identification codes are not clear due to the fact that the identification codes are arranged on steel plates with insufficient sizes of electronic products is solved, and the resolution and the identification precision of the identification codes are effectively improved. Optionally, the hollowed-out pattern is formed by laser ablation. For example, ablation of the hollowed-out pattern may be performed using an ultraviolet laser and a carbon dioxide laser.
It should be noted that when the hollow pattern is ablated, there may be two situations:
firstly, only the first contrast layer 13 is burnt through to form the hollow pattern of the identification code, and the second contrast layer 12 is not ablated, that is, the ablation depth of the hollow pattern is: the thickness of the first contrast layer 13. The hollow pattern just exposes the second contrast layer 12 which is not etched, and the second contrast layer 12 and the first contrast layer 13 form the identification code.
Secondly, the second contrast layer 12 may be partially ablated while the first contrast layer 13 is fired through the hollowed-out pattern forming the identification code. In this embodiment, the second contrast layer 12 is partially ablated but not completely ablated, and after the identification code is ablated, the hollow pattern can also expose the structure of the second contrast layer 12, so that the second contrast layer 12 and the first contrast layer 13 form the identification code. Specifically, the second contrast layer 12 forms a groove pattern; the vertical projection of the hollow pattern of the first contrast layer 13 on the plane of the second contrast layer 12 is completely overlapped with the groove pattern. A groove pattern is formed by partially ablating a layer of the second contrast layer 12, and because the groove pattern and the hollow pattern are formed by the same process, the vertical projection of the hollow pattern on the plane of the second contrast layer 12 is completely overlapped with the groove pattern.
In this embodiment, the film may also be directly attached to the housing of the electronic device or the component to individually identify the electronic device or the component.
Preferably, it can be defined that the grey value of the color of the first contrast layer 13 differs more from the grey value of the color of the second contrast layer 12. For example, the color of the first contrast layer 13 is light gray, and the gray value of the light gray is larger, so that the light gray of the first contrast layer 13 is clearly contrasted with the dark color of the first contrast layer 13. Alternatively, the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 may be greater than or equal to a first grayscale threshold; the first grayscale threshold is greater than or equal to 10. The difference value between the gray scale value of the color of the first contrast layer 13 and the gray scale value of the color of the second contrast layer 12 is at least 10, so that a relatively obvious light and shade difference is formed between the second contrast layer 12 and the first contrast layer 13, and the accuracy of the identification code identification device in identifying the identification code formed by the second contrast layer 12 and the first contrast layer 13 is improved.
In order to further increase the brightness difference between the first contrast layer 13 and the second contrast layer 12, the first grayscale threshold value may be defined as 50, and the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 is at least 50, the color brightness of the first contrast layer 13 is stronger, the color brightness of the second contrast layer 12 is smaller, the light-dark contrast between the second contrast layer 12 and the first contrast layer 13 is further increased, and the identification precision and accuracy of the identification code are improved.
On the basis of the above embodiment, in this embodiment, it may be further defined that the first grayscale threshold is 100, the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 is at least 100, the difference between the grayscale value of the color of the first contrast layer 13 and the grayscale value of the color of the second contrast layer 12 is greater than or equal to 100 and less than or equal to 255, and the color brightness of the first contrast layer 13 is greater. For example, if the gray-scale value of the color of the second contrast layer 12 is 0, the gray-scale value of the color of the first contrast layer 13 is different from the gray-scale value of the color of the second contrast layer 12 by at least 100, even 255, the gray-scale value of the first contrast layer 13 may be selected to be greater than or equal to 100. In the case of the difference between the gray values of 255, one of the second contrast layer 12 and the first contrast layer 13 is pure black, and the other is pure white, i.e. the gray values of the two are 255 and 0, the difference between the brightness and the color is large, and the definition of the identification code is further enhanced.
Based on the same concept, the embodiment of the present invention further provides a circuit board, as shown in fig. 3, fig. 3 is a schematic structural diagram of the circuit board provided by the embodiment of the present invention, and the circuit board includes a printed circuit board 2 and a film 1 provided by any embodiment of the present invention; a glue film layer is arranged on one side, away from the first contrast layer, of the second contrast layer of the film 1; one side of the glue layer of the film 1 is attached to a printed circuit board 2. This embodiment circuit board includes the utility model discloses the technical characteristic of the membrane that arbitrary embodiment provided possesses the utility model discloses the beneficial effect of the membrane that arbitrary embodiment provided.
The printed circuit board 2 is integrated with a large number of components with different functions, and in the embodiment, the positions, corresponding to the components, on the film 1 can be provided with identification codes of the components. The film 1 may cover the printed circuit board in a whole layer for realizing electromagnetic shielding in the whole layer, and the film 1 may also include a plurality of sub-films with smaller sizes, each of which is used for covering a corresponding area of the printed circuit board 2, which is not limited in this embodiment. In addition, an identification code of an electronic device where the wiring board is located may be provided on the film 1, and for example, an identification code of an electronic device may be provided on an edge region of the film 1.
Based on the same concept, the embodiment of the present invention further provides a circuit board, as shown in fig. 4, fig. 4 is a schematic structural diagram of another circuit board provided by the embodiment of the present invention, the circuit board includes a printed circuit board 2, an electromagnetic shielding layer 3 and a film 1 provided by any embodiment of the present invention; a glue film layer is arranged on one side, away from the first contrast layer, of the second contrast layer of the film 1; the electromagnetic shielding layer 3 is attached to the printed circuit board 2; one side of the glue layer of the film 1 is attached to one side of the electromagnetic shielding layer 3 far away from the printed circuit board 2. One side of the glue layer of the film 1 is attached to a printed circuit board 2. The attached electromagnetic shield layer 3 of membrane 1 sets up in this embodiment, is favorable to carrying out insulation protection to electromagnetic shield layer 3, carries out the corresponding setting of identification code to electronic product and/or components and parts simultaneously. This embodiment circuit board includes the utility model discloses the technical characteristic of the membrane that arbitrary embodiment provided possesses the utility model discloses the beneficial effect of the membrane that arbitrary embodiment provided.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (11)
1. A film, comprising: a first contrast layer;
a second contrast layer located on one side of the first contrast layer;
wherein the grey scale value of the color of the first contrast layer is greater than the grey scale value of the color of the second contrast layer.
2. The film of claim 1, further comprising: a glue layer;
the glue layer is arranged on one side, far away from the first contrast layer, of the second contrast layer.
3. The film of claim 1, wherein the difference in the grayscale value of the color of the first contrast layer and the grayscale value of the color of the second contrast layer is greater than or equal to a first grayscale threshold; the first grayscale threshold is greater than or equal to 10.
4. The film of claim 1, wherein the second contrast layer is a black polyimide or black ink.
5. The film of claim 1, wherein the first contrast layer is at least one of a white glue layer or a white ink layer.
6. The film of claim 1, wherein the first and second contrast layers have a thickness in the range of 2 to 25 μm.
7. The film of claim 1, wherein the first contrast layer is at least one of a white glue layer or a white ink layer, and the second contrast layer is a black metal layer.
8. A film, comprising: a first contrast layer;
a second contrast layer located on one side of the first contrast layer;
wherein the grey scale value of the color of the first contrast layer is greater than the grey scale value of the color of the second contrast layer; the first contrast layer forms hollow patterns of the identification codes.
9. The film of claim 8, wherein the second contrast layer forms a pattern of grooves;
and the vertical projection of the hollowed-out pattern of the first contrast layer on the plane of the second contrast layer is completely superposed with the groove pattern.
10. A circuit board, comprising: a printed circuit board and a film according to any one of claims 1 to 9; a glue film layer is arranged on one side, away from the first contrast layer, of the second contrast layer of the film;
one side of the glue layer of the film is attached to the printed circuit board.
11. A circuit board, comprising: a printed circuit board, an electromagnetic shielding layer, and the film of any one of claims 1-9; a glue film layer is arranged on one side, away from the first contrast layer, of the second contrast layer of the film;
the electromagnetic shielding layer is attached to the printed circuit board;
one side of the glue layer of the film is attached to one side of the electromagnetic shielding layer far away from the printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021486556.3U CN213126974U (en) | 2020-07-24 | 2020-07-24 | Membrane and circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021486556.3U CN213126974U (en) | 2020-07-24 | 2020-07-24 | Membrane and circuit board |
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| Publication Number | Publication Date |
|---|---|
| CN213126974U true CN213126974U (en) | 2021-05-04 |
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| CN202021486556.3U Active CN213126974U (en) | 2020-07-24 | 2020-07-24 | Membrane and circuit board |
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|---|---|
| CN (1) | CN213126974U (en) |
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