FFC (flexible flat cable) for high-frequency signal transmission

Abstract

The utility model discloses an FFC (flexible flat cable) for high-frequency signal transmission, which comprises an aluminum foil, insulating films and a plurality of silver-plated copper wires, the silver-plated copper wires are arranged on the same plane at intervals, the insulating films cover two surfaces of each silver-plated copper wire, and the aluminum foil covers the surfaces of the insulating films; one surface, in contact with the insulating film, of the aluminum foil is coated with hot melt adhesive, and the hot melt adhesive is distributed in an inclined strip shape arranged at intervals; the insulating film is a PP film, and the surface, in contact with the silver-plated copper wire, of the insulating film is coated with polyolefin insulating glue. The dielectric constant of the insulating film can be reduced, and the loss of the FFC for high-frequency signal transmission in the high-frequency signal transmission process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wire materials, in particular to an FFC flexible cable for high-frequency signal transmission. Background Art

[0002] FFC flexible wire materials have the advantages of thin thickness, softness and foldability, small volume, convenient insertion and removal, and can eliminate electromagnetic shielding, and are widely used in various electrical equipment.

[0003] The internal space of the server is small and the temperature is high. The FFC flexible wire materials of the prior art use tinned copper wires as conductors. Since the signal transmission speed of the FFC flexible wire materials is not high and the heat dissipation performance is insufficient, when used for the connection between the internal electrical components of the server, it is easy to cause large losses of high-frequency signals. Summary of the Utility Model

[0004] Aiming at the above deficiencies, the purpose of the utility model is to provide an FFC flexible cable for high-frequency signal transmission to solve the problem of high loss in the process of high-frequency signal transmission.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An FFC flexible cable for high-frequency signal transmission includes an aluminum foil, an insulating film and a plurality of silver-plated copper wires. The plurality of silver-plated copper wires are arranged at intervals in the same plane. Both sides of the plurality of silver-plated copper wires are covered with the insulating film, and the aluminum foil covers the surface of the insulating film;

[0007] One side of the aluminum foil in contact with the insulating film is coated with hot melt adhesive, and the hot melt adhesive is distributed in an inclined strip shape at intervals; the insulating film is a PP film, and one side of the insulating film in contact with the silver-plated copper wire is coated with polyolefin insulating glue.

[0008] Further, one side of both ends of the silver-plated copper wire is covered with the aluminum foil and the insulating film, and the other side of both ends of the silver-plated copper wire is exposed outside the aluminum foil and the insulating film.

[0009] In some embodiments, the plurality of silver-plated copper wires are divided into a plurality of PIN groups, and each PIN group includes at least two silver-plated copper wires;

[0010] A through hole is provided between two adjacent PIN groups, and the through hole sequentially penetrates through two silver-plated copper wires on both sides, and the aluminum foil and the insulating film covering both ends of the silver-plated copper wire.

[0011] Further, the through hole is filled with a conductive material;

[0012] The aluminum foils covering both ends of the silver-plated copper wires are electrically connected to the two silver-plated copper wires on both sides of the through hole through the conductive material.

[0013] Furthermore, it further includes a reinforcing plate;

[0014] The reinforcing plate is disposed between one side of both ends of the silver-plated copper wires and the aluminum foil.

[0015] Furthermore, it further includes a gasket;

[0016] The gasket is located between the reinforcing plate and the silver-plated copper wires;

[0017] Both the gasket and the reinforcing plate are made of PET, and both sides of the gasket and the reinforcing plate are coated with polyolefin insulating glue.

[0018] Preferably, the silver-plated copper wire is a flat wire.

[0019] The beneficial effects of the technical solution of the present utility model are as follows: For the FFC cable used for high-frequency signal transmission, by using silver-plated copper wires as conductors, on the basis of improving the electrical conductivity, the signal loss of the FFC cable used for high-frequency signal transmission during high-frequency signal transmission can be reduced; The hot melt adhesive is distributed in a slant strip shape at intervals between the aluminum foil and the insulating film, forming a so-called "M" structure, which can reduce the dielectric constant of the insulating film, making the FFC cable used for high-frequency signal transmission more adaptable to the high-speed transmission and heat dissipation requirements of high-frequency signals in servers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional structure diagram of the FFC cable used for high-frequency signal transmission of the present utility model;

[0021] Figure 2 is a schematic structural diagram of an embodiment of the FFC cable used for high-frequency signal transmission of the present utility model;

[0022] Figure 3 is a schematic structural diagram of another embodiment of the FFC cable used for high-frequency signal transmission of the present utility model;

[0023] Wherein: silver-plated copper wire 1; insulating film 2; aluminum foil 3; gasket 4; reinforcing plate 5; through hole 6; conductive material 7. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following will further illustrate the technical solution of the present utility model in conjunction with the attached Figures 1 - 3 and through specific embodiments.

[0025] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the patent; for better illustration of this embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be said that the interiors of two elements are in communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] An FFC cable for high-frequency signal transmission includes an aluminum foil 3, an insulating film 2, and a plurality of silver-plated copper wires 1. The plurality of silver-plated copper wires 1 are arranged at intervals in the same plane. Both sides of the plurality of silver-plated copper wires 1 are covered with the insulating film 2, and the aluminum foil 3 covers the surface of the insulating film 2;

[0028] One side of the aluminum foil 3 in contact with the insulating film 2 is coated with hot melt adhesive, and the hot melt adhesive is distributed in an oblique strip shape at intervals; the insulating film 2 is a PP film, and one side of the insulating film 2 in contact with the silver-plated copper wire 1 is coated with polyolefin insulating glue.

[0029] The FFC cable for high-frequency signal transmission of the present utility model uses silver-plated copper wires 1. The silver-plated layer on the surface of the silver-plated copper wires 1 can improve the electrical conductivity of the cable, and can also effectively reduce the signal loss of the FFC cable for high-frequency signal transmission during the high-frequency signal transmission process, and can also improve the corrosion resistance of the wire, making the FFC cable for high-frequency signal transmission more adaptable to the high-speed and heat dissipation requirements of server signal transmission; the insulating film 2 coated with polyolefin insulating glue has good heat resistance, which can improve the service life of the FFC wire. The hot melt adhesive is distributed in an oblique strip shape at intervals between the aluminum foil 3 and the insulating film 2, forming a so-called "M" structure, which can reduce the dielectric constant of the insulating film 2. After measurement, the dielectric constant of the insulating film 2 of the present utility model is 2.2 - 2.4.

[0030] Further, one side of both ends of the silver-plated copper wire 1 is covered with the aluminum foil 3 and the insulating film 2, and the other side of both ends of the silver-plated copper wire 1 is exposed outside the aluminum foil 3 and the insulating film 2.

[0031] Such as Figure 1As shown, the aluminum foil 3 and the insulating film 2 on one side of the silver-plated copper wire 1 are extended to cover both ends of the silver-plated copper wire 1, so that the ends of the multiple silver-plated copper wires 1 of the FFC flexible flat cable for high-frequency signal transmission are connected as a whole. While keeping the other side of both ends of the silver-plated copper wire 1 of the FFC flexible flat cable for high-frequency signal transmission exposed, the anti-bending performance of the silver-plated copper wires 1 at both ends of the FFC flexible flat cable for high-frequency signal transmission during the plugging and unplugging process can be improved, and the wire usage loss can be reduced.

[0032] In some embodiments, the multiple silver-plated copper wires 1 are divided into multiple PIN groups, and each PIN group includes at least two silver-plated copper wires 1;

[0033] A through hole 6 is provided between two adjacent PIN groups, and the through hole 6 sequentially penetrates through two silver-plated copper wires 1 on both sides, as well as the aluminum foil 3 and the insulating film 2 covering both ends of the silver-plated copper wire 1.

[0034] As Figure 1 shown, providing the through hole 6 between two adjacent PIN groups can improve the connection stability and grounding reliability of the FFC flexible flat cable for high-frequency signal transmission during use.

[0035] Furthermore, the through hole 6 is filled with a conductive material 7;

[0036] The aluminum foil 3 covering both ends of the silver-plated copper wire 1 is electrically connected to the two silver-plated copper wires 1 on both sides of the through hole 6 through the conductive material 7.

[0037] As Figure 3 shown in the embodiment, in this way, the aluminum foil 3 on one side covering both ends of the silver-plated copper wire 1 and part of the silver-plated copper wire 1 can be electrically connected to the ground wire through the filling body of the conductive material 7 in the through hole 6, thereby improving the grounding performance and electrostatic shielding performance of the above-mentioned FFC flexible flat cable of the present invention.

[0038] Preferably, conductive silver paste can be used as the conductive material 7 to fill the through hole 6.

[0039] Furthermore, a reinforcing plate 5 is further included;

[0040] The reinforcing plate 5 is disposed between one side of both ends of the silver-plated copper wire 1 and the aluminum foil 3.

[0041] As Figure 1 shown, adding the reinforcing plate 5 between the non-exposed both ends of the silver-plated copper wire 1 and the aluminum foil 3 can improve the strength and plugging and unplugging resistance performance of both ends of the FFC flexible flat cable for high-frequency signal transmission.

[0042] Furthermore, a gasket 4 is further included;

[0043] The gasket 4 is located between the reinforcing plate 5 and the silver-plated copper wire 1;

[0044] The gasket 4 and the reinforcing plate 5 are both made of PET, and both sides of the gasket 4 and the reinforcing plate 5 are coated with polyolefin insulating glue.

[0045] like Figure 1 As shown, by adding the gasket 4, the hardness and plug-in resistance of the two end wire ports of the FFC cable for high-frequency signal transmission can be further improved.

[0046] Preferably, the silver-plated copper wire 1 is a flat wire.

[0047] like Figure 2 and Figure 3 As shown, the use of flat wires can increase the electrical contact area of ​​the silver-plated copper wire 1 and improve the stability of the electrical connection of the FFC cable for high-frequency signal transmission.

[0048] In summary, if Figures 1 - 3 In the embodiment of the utility model shown, the FFC cable for high-frequency signal transmission adopts a silver-plated copper wire 1 as a conductor, which can reduce the signal loss of the FFC cable for high-frequency signal transmission during high-frequency signal transmission on the basis of improving the conductive performance; the hot melt adhesive is distributed between the aluminum foil 3 and the insulating film 2 in the form of spaced oblique strips to form a so-called Mal-shaped structure, which can reduce the dielectric constant of the insulating film 2, so that the FFC cable for high-frequency signal transmission is more suitable for the high-speed transmission and heat dissipation requirements of the server's high-frequency signals.

[0049] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. An FFC cable for high-frequency signal transmission, characterized in that: It comprises an aluminum foil, an insulating film and a plurality of silver-plated copper wires, wherein the plurality of silver-plated copper wires are arranged at intervals on the same plane, both sides of the plurality of silver-plated copper wires are covered with the insulating film, and the aluminum foil covers the surface of the insulating film; The side of the aluminum foil in contact with the insulating film is coated with hot melt adhesive, and the hot melt adhesive is distributed in oblique strips arranged at intervals; the insulating film is a PP film, and the side of the insulating film in contact with the silver-plated copper wire is coated with polyolefin insulating adhesive.

2. The FFC cable for high-frequency signal transmission according to claim 1, characterized in that: One side of both ends of the silver-plated copper wire is covered with the aluminum foil and the insulating film, and the other side of both ends of the silver-plated copper wire is exposed to the aluminum foil and the insulating film.

3. The FFC cable for high-frequency signal transmission according to claim 1, characterized in that: The plurality of silver-plated copper wires are divided into a plurality of PIN groups, each of the PIN groups includes at least two of the silver-plated copper wires; A through hole is opened between two adjacent PIN groups, and the through hole sequentially penetrates the two silver-plated copper wires on both sides, and the aluminum foil and the insulating film covering the two ends of the silver-plated copper wires.

4. The FFC cable for high-frequency signal transmission according to claim 3, characterized in that: The through hole is filled with a conductive material; The aluminum foil covering the two ends of the silver-plated copper wire is electrically connected to the two silver-plated copper wires on both sides of the through hole through the conductive material.

5. The FFC cable for high-frequency signal transmission according to claim 2, characterized in that: Also includes reinforcement plates; The reinforcing plate is arranged between one side of both ends of the silver-plated copper wire and the aluminum foil.

6. The FFC cable for high-frequency signal transmission according to claim 5, characterized in that: Also includes spacers; The gasket is located between the reinforcement plate and the silver-plated copper wire; The gasket and the reinforcing plate are both made of PET, and both sides of the gasket and the reinforcing plate are coated with polyolefin insulating glue.

7. The FFC cable for high-frequency signal transmission according to claim 1, characterized in that: The silver-plated copper wire is a flat wire.

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