CN210202345U - Electronic equipment, electromagnetic touch screen, radio frequency identification device and electromagnetic shielding film - Google Patents
Electronic equipment, electromagnetic touch screen, radio frequency identification device and electromagnetic shielding film Download PDFInfo
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- CN210202345U CN210202345U CN201790000121.3U CN201790000121U CN210202345U CN 210202345 U CN210202345 U CN 210202345U CN 201790000121 U CN201790000121 U CN 201790000121U CN 210202345 U CN210202345 U CN 210202345U
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
Abstract
The utility model belongs to the technical field of electromagnetic shielding, aim at providing an electronic equipment, electromagnetism touch screen, radio frequency identification device and electromagnetic shielding film, this electromagnetic shielding film includes the first release layer that stacks gradually, has the shielding layer of conductivity and is made by soft magnetic material and has the absorbing layer of printing characteristic, compared with the prior art, this electromagnetic shielding film's shielding effect is good, simple structure, does benefit to frivolousization and jumbo size application; the radio frequency identification device is provided with the electromagnetic shielding film on one side of the surface to be shielded of the substrate, so that the electronic tag can be read in a single direction, and the reading can be completed quickly and accurately; after the electromagnetic touch screen is provided with the electromagnetic shielding film on one side of the non-working surface of the circuit board, the consistency of the response sensitivity of different positions and the improvement of the sensitivity are ensured, meanwhile, the touch performance is stable, the application range is enlarged, and the problem that the electromagnetic radiation of the electronic equipment attached with the electromagnetic touch screen exceeds the standard is stably controlled.
Description
Technical Field
The utility model belongs to the technical field of the electromagnetic shield, more specifically say, relate to an electronic equipment, electromagnetism touch screen, radio frequency identification device and electromagnetic shielding film.
Background
Nowadays, the electromagnetic shielding film is usually formed by depositing metals such as copper and silver on a film body by a vacuum sputtering method to form a highly conductive surface, and when in application, the electromagnetic shielding film can be directly attached to the surface of conventional glass or organic glass to shield the interference of electromagnetic waves, however, in practical application, new problems are often brought, and the following application scenarios will be exemplified:
in a first application scenario, a Radio Frequency Identification (RFID) card reader is an automatic Identification device capable of reading electronic tag data, and generally, the RFID card reader needs to be equipped with an RFID antenna to be used together to read the electronic tag data. Specifically, the target electronic tags are automatically identified and relevant data inside the target electronic tags are obtained through radio frequency signals sent by the RFID antenna, manual interference is not needed in the whole identification work, a plurality of target electronic tags can be identified simultaneously, and the whole identification process is convenient and rapid.
Generally, an RFID card reader can read information in two opposite directions, however, in practical applications, only one side is often needed to read information, in order to solve the problem, in the prior art, a metal sheet is generally disposed on one side of the RFID card reader where card reading is not needed, however, after the metal sheet is directly disposed on the RFID card reader, an RFID antenna may be subjected to electromagnetic interference of the metal sheet, and finally, it is difficult to read a card or even impossible to read a card on the side where the card reading is needed.
The second uses the scene, the electromagnetism touch screen, it is the screen body that relies on the electromagnetic pen to produce the magnetic field change with the inductor under the glass panels and distinguish the touch position point, wherein, the electromagnetic pen is the signal transmission end, the antenna panel is the signal reception end, however, at the induction process, the internal circuit board of screen can produce electromagnetic interference to the signal of electromagnetic pen, use the silicon steel sheet to solve signal interference in the past, however, in practical application, the silicon steel sheet is fragile easily to assemble, easy oxidation is perforated, short service life, be difficult to process into great size, inconvenient on trying on the large-size screen, easily produce secondary interference.
In addition, in the application process, generally, the edge of the electromagnetic touch screen is provided with a metal frame to protect the electromagnetic touch screen, so that the magnetic environments of the middle position and the edge position of the electromagnetic touch screen are different, correspondingly, the reaction sensitivities of the electromagnetic pen at the middle position and the edge position are also different, and finally the experience of a user is poor.
In a third application scenario, in order to ensure user safety, in the production process of electronic devices such as mobile phones, electromagnetic radiation exceeding detection is generally performed on the electronic devices, and if the electromagnetic radiation exceeding detection exceeds the standard, a metal material is generally used for shielding, so that excessive electromagnetic wave radiation to the outside is reduced as much as possible.
It is obvious from the above that the conventional electromagnetic shielding film can shield external electromagnetic interference, but cannot prevent the interference of the electromagnetic shielding film to a target object, and the shielding effect is not good as a whole.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electromagnetic shielding film for solve the electromagnetic wave that the shielding film that exists among the prior art can shield the external world of target object and target object self radiation, nevertheless can't prevent shielding film self to the electromagnetic interference of target object, shielding effect is not good overall, and the structure is more complicated to lead to being unfavorable for frivolous and jumbo size technical problem of using.
In order to solve the technical problem, the utility model discloses a technical scheme is: providing an electromagnetic shielding film, wherein the electromagnetic shielding film comprises a first release layer, a shielding layer which can shield electromagnetic waves and has conductive performance, and a wave-absorbing layer which is made of soft magnetic materials, has printing characteristics and can absorb the electromagnetic waves, the shielding layer is provided with a top surface and a bottom surface which is arranged opposite to the top surface, the wave-absorbing layer is attached to the top surface of the shielding layer, and the first release layer is attached to the bottom surface of the shielding layer; the thickness range of the electromagnetic shielding film is 0.01 mm-5.00 mm.
Compared with the prior art, the utility model provides an electromagnetic shielding film's beneficial effect lies in:
the electromagnetic shielding film comprises a shielding layer with conductive performance and a wave absorbing layer made of soft magnetic materials, wherein the shielding layer can shield electromagnetic interference of external electromagnetic waves on a target object and can also shield the electromagnetic wave radiation of the target object; in addition, the electromagnetic shielding film has fewer film layers and simpler structure under the same shielding effect, thereby being beneficial to light and thin application, and the wave absorbing layer is made of flexible materials, so that the electromagnetic shielding film has good flexibility and is not easy to break, thereby being beneficial to large-size application.
The purpose of the utility model is to provide a radio frequency identification device for the radio frequency identification device who exists is difficult to realize the folk prescription among the solution prior art and to reading information, even realize, also appears the technical problem that information reading difficulty can't read even easily.
In order to solve the technical problem, the utility model discloses a technical scheme is: the radio frequency identification device comprises a substrate and the electromagnetic shielding film, wherein the electromagnetic shielding film is positioned on one side of the surface to be shielded of the substrate.
Compared with the prior art, the utility model provides a radio frequency identification device's beneficial effect lies in: the radio frequency identification device can realize the unidirectional reading of the radio frequency identification device by adopting the electromagnetic shielding film and the shielding layer with the conductive performance of the electromagnetic shielding film, meanwhile, the wave absorbing layer with the wave absorbing property of the electromagnetic shielding film is arranged on the shielding layer, obviously, the wave absorbing layer can directly absorb the electromagnetic waves radiated by the antenna, and the secondary interference caused by the emission of the shielding layer to the antenna is avoided, so that the radio frequency identification device can quickly and accurately read when the information is read unidirectionally.
The utility model aims at still providing an electromagnetism touch screen for solve the electromagnetism touch screen that exists among the prior art and lead to the touch performance stable inadequately because of receiving electromagnetic interference, life is short and application scope is narrower, simultaneously differ because of the magnetic environment of intermediate position and border position, lead to the reaction sensitivity of electromagnetism touch screen at different positions to differ, and even also sensitivity is not good under the same condition of magnetic environment, the phenomenon that the reaction lags appears, finally lead to user's experience to feel not good technical problem.
In order to solve the technical problem, the utility model discloses a technical scheme is: the electromagnetic touch screen comprises a circuit board and the electromagnetic shielding film, wherein the electromagnetic shielding film is positioned on one side of the non-working surface of the circuit board.
Compared with the prior art, the utility model provides an electromagnetism touch screen's beneficial effect lies in: the electromagnetic touch screen is characterized in that the electromagnetic shielding film is arranged on one side of the non-working surface of the circuit board, the electromagnetic interference caused by the circuit board can be avoided by virtue of the shielding layer with the conductive performance of the electromagnetic shielding film, the electromagnetic wave absorbing layer adhered on the shielding layer is utilized to directly absorb the electromagnetic wave radiated to the shielding layer, and the secondary interference caused by the reflection of the electromagnetic wave back is avoided.
Meanwhile, because of above-mentioned electromagnetic shielding film pastes and establishes on the circuit board, be located the centre of electromagnetism touch screen, from this, the shielding layer that has the electrical conductivity of electromagnetic shielding film can be balanced mutually with the metal frame at electromagnetism touch screen border, ensure that the intermediate position of electromagnetism touch screen and the magnetic environment of border position keep unanimous, and then guarantee that the reaction sensitivity of electromagnetism touch screen in different positions is unanimous, moreover, can also improve the reaction sensitivity of electromagnetism touch screen to a certain extent, the phenomenon that the reaction lags can not appear, promote user's experience and feel.
The utility model aims at providing an electronic equipment still for solve the electronic equipment's that exists among the prior art electromagnetic radiation problem that exceeds standard difficult technical problem of controlling.
In order to solve the technical problem, the utility model discloses a technical scheme is: an electronic device is provided, which includes the electromagnetic shielding film.
Compared with the prior art, the utility model provides an electronic equipment's beneficial effect lies in: the electromagnetic radiation of the electronic equipment can be prevented from exceeding the standard by additionally attaching the electromagnetic shielding film and using the shielding layer of the electromagnetic shielding film, and meanwhile, the electromagnetic wave absorbing layer is attached to the shielding layer, so that components in the electronic equipment can be directly radiated to the electromagnetic wave absorption of the shielding layer, secondary electromagnetic interference caused by the fact that the shielding layer reflects the electromagnetic wave back is avoided, and obviously, the electromagnetic radiation of the electronic equipment is stably controlled from exceeding the standard.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electromagnetic shielding film according to a first embodiment of the present invention, in which a main layer structure of the electromagnetic shielding film is in a separated state;
fig. 2 is a schematic cross-sectional structure diagram of an electromagnetic shielding film according to a first embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure view of an electromagnetic shielding film according to a second embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure view of an electromagnetic shielding film according to a third embodiment of the present invention;
fig. 5 is a schematic cross-sectional structure diagram of an electromagnetic shielding film according to a fourth embodiment of the present invention.
Wherein the reference numbers in the drawings are as follows:
10-a first tie layer, 20-a second tie layer, 30-a third tie layer;
100-shielding layer, 110-top surface, 120-bottom surface, 200-wave absorbing layer, 300-first release layer, 400-first protective film layer, 500-second release layer and 600-second protective film layer.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention to be solved clearer, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be further noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc., indicating directions or positional relationships based on those shown in the drawings, it is only for convenience of description and simplicity of description, but not for indicating or implying that the indicated device or element must have a specific direction, be constructed in a specific direction, and operate, and therefore, the terms describing the positional relationships in the drawings are used only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the above terms according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The following describes an implementation of the electromagnetic shielding film provided by the present invention in detail with reference to the accompanying drawings.
It should be noted that the thickness range of the electromagnetic shielding film is 0.01mm to 5.00mm, although the thicker the electromagnetic shielding film is, the stronger the shielding and wave absorbing ability is, in practical application, the thickness of the electromagnetic shielding film should be determined according to actual needs. In addition, during the use process, the electromagnetic shielding layer 100 may be cut into various shapes, such as a circle, a rectangle, etc., and the details should also be determined according to the actual needs. In conclusion, compared with the existing shielding film, the electromagnetic shielding film has fewer structural layers, is lighter and thinner as a whole, and is more beneficial to mass production.
Example one
As shown in fig. 1 and 2, the electromagnetic shielding film includes a first release layer 300, a shielding layer 100 and a wave-absorbing layer 200, wherein the shielding layer 100 has electrical conductivity and has a property of shielding electromagnetic waves, and it can be understood that when the electromagnetic shielding film is disposed on an object, the shielding layer 100 of the electromagnetic shielding film can prevent external electromagnetic waves from entering the object, and can also shield electromagnetic waves radiated from the object from entering a working environment of the object.
In the present embodiment, the shielding layer 100 is preferably a metal sheet or a metal coating, and specifically, the shielding layer 100 may be made of any material of iron, aluminum, copper, gold, silver, platinum, an alloy, conductive graphite, and the like, but of course, the material is not limited to these materials, and the material should be determined according to actual needs. More specifically, the thickness of the shielding layer 100 ranges from 0.01mm to 1.00 mm.
As shown in fig. 2, the shielding layer 100 has a top surface 110 and a bottom surface 120 opposite to the top surface 110, in this embodiment, the top surface 110 is parallel to the bottom surface 120, and actually, the top surface 110 may not be parallel to the bottom surface 120. Generally, the wave-absorbing layer 200 is attached to the top surface 110 of the shielding layer 100, and the first release layer 300 is attached to the bottom surface 120 of the shielding layer 100, that is, the wave-absorbing layer 200, the shielding layer 100, and the first release layer 300 are sequentially stacked.
It should be noted that, in general, the wave-absorbing layer 200 and the first release layer 300 can be disposed on the top surface 110 and the bottom surface 120 of the shielding layer 100 respectively by means of adhesive bonding, hot pressing, or the like. Preferably, in this embodiment, as shown in fig. 2 again, the wave-absorbing layer 200 is attached to the top surface 110 of the shielding layer 100 through the first adhesive layer 10, and the first release layer 300 is attached to the bottom surface 120 of the shielding layer 100 through the second adhesive layer 20. Wherein, the thickness range of the first bonding layer 10 and the second bonding layer 20 is 0.01 mm-0.50 mm. Correspondingly, the thickness of the wave-absorbing layer 200 is preferably in the range of 0.01mm to 3.00 mm.
Note that, in general, both the wave-absorbing layer 200 and the shielding layer 100 may be single-layer structured sheets, or sheets formed by stacking multiple layers, and when the wave-absorbing layer 200 and the shielding layer 100 are stacked in multiple layers, they may be stacked by gluing, hot pressing, or the like.
Because the wave-absorbing layer 200 can absorb electromagnetic waves, the shielding layer 100 can shield and isolate the electromagnetic waves, and at the same time, the wave-absorbing layer 200 can absorb the electromagnetic waves, so as to better isolate the external electromagnetic waves from the target object, or better prevent the electromagnetic waves emitted by the target object from radiating to the external environment. In addition, since the wave-absorbing layer 200 is disposed on the shielding layer 100, the wave-absorbing layer 200 can also directly absorb the electromagnetic wave radiated from the target object to the shielding layer 100, so as to avoid the secondary interference of the shielding layer 100 itself to the target object, and obviously, the electromagnetic shielding film has a good shielding effect.
Because the wave-absorbing layer 200 is made of soft magnetic material, the wave-absorbing layer 200 has good flexibility and is not easy to break, which is beneficial to large-size and light and thin application. Specifically, the wave-absorbing layer 200 is made of any one of sintered ferrite, an iron-based nanocrystalline material, an iron-based amorphous material, a composite material formed by blending soft magnetic powder and high molecular plastics, and the like, and certainly, the wave-absorbing layer is not limited to these materials, and the specific material can be determined according to actual needs.
Because the wave-absorbing layer 200 has the printing characteristic, different patterns with various colors can be printed on the electromagnetic shielding film, so that the appearance of the electromagnetic shielding film is improved, and the promotion is facilitated.
Example two
As shown in fig. 3, for another embodiment of the present invention, the main technical features of the present embodiment are substantially the same as those of the first embodiment, and are not described herein again, wherein the main differences between the present embodiment and the first embodiment are as follows:
because the wave-absorbing layer 200 is made of soft magnetic material, in order to improve the strength of the wave-absorbing layer 200 and prevent the wave-absorbing layer 200 from being damaged in the using process, the electromagnetic shielding film further comprises a first protective film layer 400, wherein the first protective film layer 400 is attached to the wave-absorbing layer 200 on the side away from the top surface 110 of the shielding layer 100, that is, as shown in fig. 3, the first protective film layer 400, the wave-absorbing layer 200, the shielding layer 100 and the first release layer 300 are sequentially stacked.
It should be noted that the first protective film 400 is generally a polymer protective film, such as a plastic film made of PET, PE, PP, PC, PVC, PI, etc., but not limited to these materials, and is for meeting the personalized requirements of different users. The first protective film 400 can have different thicknesses, and the thickness of the first protective film 400 is usually in the range of 0.01mm to 0.50mm, although the specific thickness of the first protective film 400 is determined according to actual needs.
It should be noted that, in order to improve the appearance of the electromagnetic shielding film and facilitate promotion, the first protective film layer 400 has a printing characteristic, that is, different patterns of various colors may be printed on the first protective film layer 400. However, it should be noted that when the wave-absorbing layer 200 is printed with a pattern, the first protective film 400 should be transparent in order to show the pattern.
EXAMPLE III
As shown in fig. 4, for another embodiment of the present invention, the main technical features of the present embodiment are substantially the same as those of the first embodiment, and are not described herein again, wherein the main differences between the present embodiment and the first embodiment are as follows:
for the convenience satisfies different demands, before locating the object with the electromagnetic shielding film, protect absorbing layer 200, the electromagnetic shielding film still includes the second from type layer 500, wherein, the second is glued from type layer 500 accessible or modes such as hot pressing set up on absorbing layer 200. It can be understood that, in the present embodiment, the second release layer 500, the wave-absorbing layer 200, the shielding layer 100 and the first release layer 300 are sequentially stacked.
Specifically, as shown in fig. 4, on the side away from the top surface 110 of the shielding layer 100, the second release layer 500 is attached to the wave-absorbing layer 200 through the third adhesive layer 30, preferably, in this embodiment, the thickness of the first release layer 300 is consistent with the thickness of the second release layer 500, and certainly, in practical applications, the thickness of the first release layer 300 may not be consistent with the thickness of the second release layer 500. Correspondingly preferably, the thickness of the third adhesive layer 30 is less than or equal to the thickness of the second adhesive layer 20. The thickness of the third adhesive layer 30 ranges from 0.01mm to 0.50mm, wherein the specific thickness of the third adhesive layer 30 is determined according to actual needs.
Example four
As shown in fig. 5, for another embodiment of the present invention, the main technical features of the present embodiment are substantially the same as those of the first embodiment, and are not described herein again, wherein the main differences between the present embodiment and the first embodiment are as follows:
as shown in fig. 5, the electromagnetic shielding film includes a second protective film layer 600, a shielding layer 100 and a wave-absorbing layer 200, wherein the shielding layer 100 has a top surface 110 and a bottom surface 120 disposed opposite to the top surface 110, in this embodiment, the top surface 110 is parallel to the bottom surface 120, and actually, the top surface 110 may not be parallel to the bottom surface 120. The wave-absorbing layer 200 is attached to the top surface 110 of the shielding layer 100, the second protective film layer 600 is attached to the bottom surface 120 of the shielding layer 100, and the second protective film layer 600 is attached to the wave-absorbing layer 200 on the side away from the top surface 110 of the shielding layer 100, that is, as shown in fig. 5, in this embodiment, the second protective film layer 600, the wave-absorbing layer 200, the shielding layer 100, and the second protective film layer 600 are sequentially stacked, and the thickness range of the electromagnetic shielding film is 0.01mm to 5.00 mm.
It should be noted that the second protective film layer 600 is generally a polymer protective film, such as a plastic film made of PET, PE, PP, PC, PVC, PI, etc., but not limited to these materials, and is for meeting the personalized requirements of different users. The second protective film 600 may have different thicknesses, and the thickness of the second protective film 600 is usually in the range of 0.01mm to 0.50mm, although the specific thickness of the second protective film 600 is determined according to actual needs.
The utility model also provides a radio frequency identification device, this radio frequency identification device include base plate and foretell electromagnetic shielding film, and wherein, electromagnetic shielding film is located one side of treating the shielding face of base plate. The surface to be shielded is the surface of the radio frequency identification device which needs to shield and read information. Specifically, the wave absorbing layer 200 of the electromagnetic shielding film faces the surface to be shielded of the substrate and is disposed on one side of the surface to be shielded of the substrate.
More specifically, if the electromagnetic shielding film in the first embodiment or the second embodiment is adopted, after the first release layer 300 is removed from one side of the surface to be shielded of the substrate, the shielding layer 100 and the substrate are pasted on other parts of the radio frequency identification device back to back or arranged on other objects, the wave-absorbing layer 200 is laid flat and arranged face to face with the surface to be shielded of the substrate, and preferably, the wave-absorbing layer 200 is tightly attached to the surface to be shielded of the substrate; if the electromagnetic shielding film in the third embodiment is adopted, the first release layer 300 and the second release layer 500 may be removed, and the shielding layer 100 may be attached to other components of the rfid device, or may be attached to other objects, and the wave-absorbing layer 200 may be attached to the surface of the substrate to be shielded, or may be attached to other components of the rfid device, on one side of the surface of the substrate to be shielded. The same applies to the fourth embodiment. Thus, the shielding layer 100 of the electromagnetic shielding film can shield the electromagnetic wave of the electronic tag, so that the electronic tag cannot be read on the side of the rfid device on which the electromagnetic shielding film is disposed, and can only be read on the other side, thereby achieving the function of one-way information reading of the rfid device.
Meanwhile, the wave absorbing layer 200 attached to the shield can directly absorb the electromagnetic wave emitted from the antenna of the rfid device to the shielding layer 100, thereby preventing the shielding layer 100 from emitting the electromagnetic wave back to cause secondary interference to the antenna, and thus ensuring that the rfid device can quickly and accurately read information.
The utility model also provides an electromagnetism touch screen, this electromagnetism touch screen include circuit board and foretell electromagnetic shielding film, and wherein, electromagnetic shielding film is located one side of the non-working face of circuit board. The non-working surface of the circuit board, that is, the surface of the electromagnetic touch screen that needs to shield electromagnetic waves, is described herein. Specifically, the wave-absorbing layer of the electromagnetic shielding film is arranged facing the non-working surface of the circuit board, and the shielding layer is arranged opposite to the non-working surface of the circuit board.
Finally, the utility model also provides an electronic equipment, this electronic equipment includes foretell electromagnetic shielding film.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (14)
1. The electromagnetic shielding film is characterized by comprising a first release layer, a shielding layer which can shield electromagnetic waves and has conductive performance, and a wave absorbing layer which is made of soft magnetic materials, has printing characteristics and can absorb the electromagnetic waves, wherein the shielding layer is provided with a top surface and a bottom surface which is arranged opposite to the top surface, the wave absorbing layer is attached to the top surface of the shielding layer, and the first release layer is attached to the bottom surface of the shielding layer; the thickness range of the electromagnetic shielding film is 0.01 mm-5.00 mm; the wave absorbing layer is attached to the top surface of the shielding layer through a first bonding layer, and the first release layer is attached to the bottom surface of the shielding layer through a second bonding layer.
2. The electromagnetic shielding film of claim 1, wherein the wave-absorbing layer has a thickness ranging from 0.01mm to 3.00 mm.
3. The electromagnetic shielding film of claim 1, wherein the shielding layer is a metal sheet or a metal coating.
4. The electro-magnetic shielding film of claim 3, wherein the thickness of the shielding layer is in the range of 0.01mm to 1.00 mm.
5. The electromagnetic shielding film according to any one of claims 1 to 4, further comprising a first protective film layer with printing property, wherein the first protective film layer is attached on the wave-absorbing layer on a side away from the top surface of the shielding layer, and when the wave-absorbing layer is printed with a pattern, the first protective film layer is transparent.
6. The electro-magnetic shielding film of claim 5, wherein the first protective film layer has a thickness ranging from 0.01mm to 0.50 mm.
7. The electromagnetic shielding film according to any one of claims 1 to 4, further comprising a second release layer, wherein the second release layer is attached to the wave-absorbing layer through a third adhesive layer on a side of the top surface away from the shielding layer.
8. The electromagnetic shielding film according to claim 7, wherein: the thickness of the first release layer is consistent with that of the second release layer.
9. The electromagnetic shielding film according to claim 7, wherein: the thickness of the third bonding layer is less than or equal to the thickness of the second bonding layer.
10. The electromagnetic shielding film is characterized by comprising a second protective film layer, a shielding layer which can shield electromagnetic waves and has conductive performance, and a wave absorbing layer which has magnetic and printing characteristics and can absorb the electromagnetic waves, wherein the shielding layer is provided with a top surface and a bottom surface, the wave absorbing layer is attached to the top surface of the shielding layer, the second protective film layer is attached to the bottom surface of the shielding layer, and the second protective film layer is attached to one side, far away from the top surface of the shielding layer, of the wave absorbing layer; the thickness range of the electromagnetic shielding film is 0.01 mm-5.00 mm.
11. The electromagnetic shielding film according to claim 10, wherein: the thickness range of the second protective film layer is 0.01 mm-0.50 mm.
12. A radio frequency identification device, characterized by: the rfid device includes a substrate and the electromagnetic shielding film according to any one of claims 1 to 11, the electromagnetic shielding film being located on one side of a surface to be shielded of the substrate.
13. Electromagnetic touch screen, its characterized in that: the electromagnetic touch screen comprises a circuit board and the electromagnetic shielding film according to any one of claims 1 to 11, wherein the electromagnetic shielding film is positioned on one side of a non-working surface of the circuit board.
14. An electronic device, characterized in that: the electronic device comprising the electromagnetic shielding film according to any one of claims 1 to 11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/095166 WO2019023847A1 (en) | 2017-07-31 | 2017-07-31 | Electronic device, electromagnetic touch screen, radio frequency identification device and electromagnetic shielding film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210202345U true CN210202345U (en) | 2020-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201790000121.3U Active CN210202345U (en) | 2017-07-31 | 2017-07-31 | Electronic equipment, electromagnetic touch screen, radio frequency identification device and electromagnetic shielding film |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN210202345U (en) |
| WO (1) | WO2019023847A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427709A (en) * | 2011-09-06 | 2012-04-25 | 东莞市万丰纳米材料有限公司 | Electromagnetic shielding film and preparation method thereof |
| KR101926797B1 (en) * | 2012-07-31 | 2018-12-07 | 삼성전기주식회사 | Printed circuit board |
| CN103619154B (en) * | 2013-12-09 | 2016-09-14 | 保定乐凯新材料股份有限公司 | A kind of electromagnetic protection film with high-efficiency shielding and electromagnetic absorption |
| CN105578851A (en) * | 2014-10-15 | 2016-05-11 | 昆山雅森电子材料科技有限公司 | Thin-type high-transmission electromagnetic-absorbing screened film and manufacturing method thereof |
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2017
- 2017-07-31 CN CN201790000121.3U patent/CN210202345U/en active Active
- 2017-07-31 WO PCT/CN2017/095166 patent/WO2019023847A1/en active Application Filing
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| WO2019023847A1 (en) | 2019-02-07 |
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