Anti-interference splicing film structure of FPC
By using an anti-interference splicing film structure on the FPC, the shielding film and the high-temperature resistant film are spliced at one time, which solves the process elongation and alignment problems caused by separate bonding in the prior art, improves the adhesion yield and efficiency, and ensures the shielding effect and grounding performance.
Patent Information
- Application Number
- CN202421512927.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the prior art, the conductive fabric and the shielding film on the FPC are laid separately, the process is lengthened and the position is difficult to overlap, which affects the adhesion yield and efficiency.
The anti-interference splicing film structure is adopted. By splicing the shielding film and the high-temperature resistant film first, a single adhesion is formed, and precise alignment is ensured by positioning right angle lines and avoiding gaps. The high-temperature resistant film and conductive cloth are used to improve the bonding accuracy and efficiency.
The one-time adhesion of the shielding film and high-temperature resistant film on the FPC is realized, which improves the adhesion yield and efficiency, simplifies the process, and ensures the shielding effect and grounding performance.
Smart Images
Figure CN223093940U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of FPC, in particular to an anti-interference splicing film structure for FPC. Background Art
[0002] During the production process of in-vehicle casting modules, in order to ensure the sealing performance of the opening position of the FPC bending, it is necessary to attach conductive cloth and shielding film simultaneously at the opening position to ensure the sealing performance. The existing method is to separately attach the conductive cloth and the shielding film on the FPC, but not only does the process become longer; moreover, it is very difficult to align the positions of the conductive cloth and the shielding film during the two-time attachment, and the alignment difficulty is high, which affects the attachment yield and efficiency. Summary of the Utility Model
[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an anti-interference splicing film structure for FPC.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] An anti-interference splicing film structure for FPC includes: a protective film, a shielding film, and a high-temperature resistant film; one side of the shielding film has adhesiveness, the lower side of the adhesive surface of the shielding film is bonded and spliced with one side of the high-temperature resistant film, the protective film is bonded to the shielding film and the high-temperature resistant film respectively, and the other side of the high-temperature resistant film has adhesiveness and is attached to the protective film.
[0006] In one embodiment, positioning right-angle lines are provided on the shielding film, and the positioning right-angle lines are used to position the high-temperature resistant film.
[0007] In one embodiment, an avoidance notch is provided on the shielding film.
[0008] In one embodiment, the protective film is a heavy release film.
[0009] In one embodiment, the protective film has a cuboid structure.
[0010] In one embodiment, the shielding film is an EMI film.
[0011] In one embodiment, the thickness of the shielding film is 0.1 mm.
[0012] In one embodiment, the high-temperature resistant film is conductive cloth.
[0013] In one embodiment, the bonding surface of the conductive cloth and the protective film has adhesiveness, and the bonding surface of the conductive cloth is conductive.
[0014] In one of the embodiments, a hand-lifting part is provided on one side of the protective film, and the hand-lifting part extends to the outside of the shielding film.
[0015] Compared with the prior art, the utility model has at least the following advantages:
[0016] The anti-interference splicing film structure of an FPC of the utility model is provided with a protective film, a shielding film and a high-temperature resistant film. The utility model preferentially splices the shielding film and the high-temperature resistant film, so that the anti-interference splicing film structure of an FPC is attached to the FPC once, without two times, shortening the process, improving the fitting accuracy between the shielding film and the high-temperature resistant film, and improving the attaching yield and efficiency of the anti-interference splicing film structure of an FPC on the FPC. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below.
[0018] Figure 1 It is a schematic cross-sectional structure diagram of an anti-interference splicing film structure of an FPC in an embodiment of the present utility model;
[0019] Figure 2 It is a schematic front structure diagram of an anti-interference splicing film structure of an FPC in an embodiment of the present utility model.
[0020] Reference numerals:
[0021] Protective film 10, shielding film 20, high-temperature resistant film 30, support film 40, avoidance notch 50. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] In order to facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings.
[0023] The present application provides an anti-interference splicing film structure for an FPC, which is used for fitting on the FPC. Please refer to Figure 1 and Figure 2 , including: a protective film 10, a shielding film 20 and a high-temperature resistant film 30. The shielding film 20 is a material for isolating electromagnetic waves, usually composed of a metal foil and a polymer film. It can prevent external electromagnetic wave interference, and at the same time prevent the leakage of electromagnetic waves inside the device, improving the stability and reliability of electronic devices. A metal layer is provided on the outside of the shielding film 20, and the metal layer is used for EMC prevention. Preferably, the protective film 10 is in a cuboid structure. The shielding film 20 is an EMI film.
[0024] Specifically, one side of the shielding film 20 has adhesiveness. The lower side of the adhesive surface of the shielding film 20 is bonded and spliced with one side of the high-temperature resistant film 30. The protective film 10 is bonded to the shielding film 20 and the high-temperature resistant film 30 respectively. The other side of the high-temperature resistant film 30 has adhesiveness, and this side is attached to the protective film 10. In the present utility model, the shielding film 20 and the high-temperature resistant film 30 are preferentially spliced, so that an anti-interference splicing film structure of an FPC is attached to the FPC once, without the need for two times, shortening the process, improving the fitting accuracy between the shielding film 20 and the high-temperature resistant film 30, and improving the attaching yield and efficiency of an anti-interference splicing film structure of an FPC on the FPC.
[0025] It should be noted that the staff spliced the separately incoming high-temperature resistant film 30 and the separately incoming EMI shielding film 20 together. The film cutting machine punches and cuts the high-temperature resistant film 30 and the EMI shielding film 20 into finished products at one time, which can ensure the overlapping position of the two. After attaching an anti-interference splicing film structure of an FPC once, the position stability of the high-temperature resistant film 30 and the shielding film 20 is ensured, and the attaching yield of the FPC is improved. In order to better fit the shielding film 20 and the protective film 10, a support film 40 is provided. The support film 40 is arranged above the high-temperature resistant film 30, and the shielding film 20 is attached to the protective film 10 through the support film 40. And, the thickness of the support film 40 is the same as that of the high-temperature resistant film 30.
[0026] Preferably, the thickness of the shielding film 20 is 0.1 mm. The thickness of the shielding film 20 is thick enough to prevent the shielding film 20 from being punctured, resulting in the failure of the shielding effect, and the components on the FPC are easily interfered by external signals.
[0027] In an embodiment, the protective film 10 is a heavy release film. The heavy release film has good hardness and can support the shielding film 20 and the high-temperature resistant film 30, so that the shielding film 20 and the high-temperature resistant film 30 are placed flat for easy transportation.
[0028] Furthermore, positioning right-angle lines are provided on the shielding film 20. The high-temperature resistant film 30 is accurately attached by using the positioning right-angle lines for alignment, providing the production line yield and production efficiency.
[0029] Please refer to again Figure 2 , an avoidance notch 50 is provided on the shielding film 20. The avoidance notch 50 is adaptively set with the avoidance area of the FPC to avoid hindering the setting of other components.
[0030] In another embodiment, the high-temperature resistant film 30 is a conductive cloth, which is a special cloth, and its main material is a mixture of metal fiber and polyester fiber. It is a conductive material and can be used to manufacture various conductive products. The surface of the conductive cloth is very smooth, having good electrical conductivity and insulation properties. It can be processed into various shapes and sizes according to needs, with high flexibility and applicability. At the same time, the conductive cloth has the advantages of high temperature resistance, corrosion resistance, anti-aging, etc., and has a long service life. When an anti-interference splicing film structure of an FPC is attached to the FPC and the FPC is heat-treated, it can prevent the corners of the anti-interference splicing film structure of the FPC from curling up, resulting in poor attachment effect and ineffective grounding effect.
[0031] Furthermore, the bonding surface between the conductive cloth and the protective film 10 has adhesiveness and is electrically conductive, while the other side opposite to the bonding surface has no adhesiveness and is not electrically conductive. A copper-clad ground network is provided at the window opening of the FPC. The conductive surface of the conductive cloth is bonded to the window opening of the FPC, so that external interference of the conductive cloth can be introduced into the ground network of the FPC through this grounding design.
[0032] In addition, a hand-lifting part is provided on one side of the protective film 10, and the hand-lifting part extends to the outside of the shielding film 20, so as to facilitate the tearing of an anti-interference splicing film structure of an FPC from the protective film 10 and reduce the difficulty of peeling off.
[0033] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. An anti-interference splicing film structure for an FPC, characterized in that, Including: A protective film, a shielding film, and a high-temperature resistant film; One side of the shielding film has adhesiveness. Below the adhesive surface of the shielding film, it is bonded and spliced with one side of the high-temperature resistant film. The protective film is bonded to the shielding film and the high-temperature resistant film respectively. The other side of the high-temperature resistant film has adhesiveness, and this side is attached to the protective film.
2. The anti-interference splicing film structure of an FPC according to claim 1, characterized in that, Positioning right-angle lines are provided on the shielding film, and the positioning right-angle lines are used to position the high-temperature resistant film.
3. A anti-interference splicing film structure of an FPC according to claim 1, characterized in that, Avoidance notches are provided on the shielding film.
4. A FPC anti-interference splicing film structure according to claim 1, characterized in that The protective film is a heavy release film.
5. A FPC anti-interference splicing film structure according to claim 1, characterized in that, The protective film has a cuboid structure.
6. A FPC anti-interference splicing film structure according to claim 1, characterized in that, The shielding film is an EMI film.
7. A FPC anti-interference splicing film structure according to claim 1, characterized in that The thickness of the shielding film is 0.1 mm.
8. The anti-interference splicing film structure of an FPC according to claim 1, characterized in that, The high-temperature resistant film is a conductive fabric.
9. The anti-interference splicing film structure of an FPC according to claim 8, characterized in that, The bonding surface of the conductive fabric and the protective film has adhesiveness, and the bonding surface of the conductive fabric is conductive.
10. The anti-interference splicing film structure of an FPC according to claim 1, characterized in that, A hand-lifting part is provided on one side of the protective film, and the hand-lifting part extends to the outside of the shielding film.