CN220324165U - Low-delay-difference flexible flat cable - Google Patents
Low-delay-difference flexible flat cable Download PDFInfo
- Publication number
- CN220324165U CN220324165U CN202321635391.5U CN202321635391U CN220324165U CN 220324165 U CN220324165 U CN 220324165U CN 202321635391 U CN202321635391 U CN 202321635391U CN 220324165 U CN220324165 U CN 220324165U
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- Prior art keywords
- conductor
- shielding film
- low
- layer
- flexible flat
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- 239000004020 conductor Substances 0.000 claims abstract description 52
- 239000010410 layer Substances 0.000 claims abstract description 47
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- 239000011888 foil Substances 0.000 claims abstract description 16
- 239000004831 Hot glue Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000010985 leather Substances 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 4
- 239000003063 flame retardant Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model discloses a low-delay-difference flexible flat cable, which comprises a conductor, wherein a coating film capable of being used as a printing surface and a shielding film without a printing surface are respectively arranged on the upper side and the lower side of the conductor; the shielding film comprises an aluminum foil layer, PET layers are arranged on the upper side face and the lower side face of the aluminum foil layer, and a high-viscosity hot melt adhesive layer is further arranged on the outer side of the PET layer close to one side of the conductor so that the shielding film and the conductor are adhered and fixed. According to the low-delay-difference flexible flat cable, the shielding film is adopted to replace a common leather film to be assembled with the conductor, the improved flat copper wire size is matched, so that the delay difference of the cable is lower, the effect is more excellent, the shielding film is simple and practical in structure, the process steps during assembly can be reduced, the production cost is saved, meanwhile, the interference of cable signal transmission is reduced after the width of the flat copper wire in the conductor is reduced, and the crosstalk data is improved.
Description
Technical Field
The utility model relates to the technical field of flexible flat cables, in particular to a flexible flat cable with low delay difference.
Background
The Flexible Flat Cable (FFC) is used for signal transmission, and is generally realized by combining conductors, hot melt adhesive films and shielding materials, the number and the distance of the conductors can be arbitrarily selected, so that the wiring is more convenient, the volume of an electronic product is greatly reduced, and the flexible flat cable is most suitable for data transmission cables between a mobile part and a main board, between a PCB board and in miniaturized electrical equipment, and therefore, the flexible flat cable is widely applied to signal transmission and board connection of various products such as sound equipment, liquid crystal electrical appliances, plotters, scanners and the like.
In practical use, limited by the mechanism, shielding material pasting method and material shielding effect difference applied by the flexible flat cable, corresponding products need to be designed according to practical situations, sharing of material surfaces and product design surfaces cannot be achieved, conductors formed by copper wires with the thickness of 0.3 x 0.035mm are generally adopted in the industry, common hot melt adhesive films are arranged on the upper side and the lower side of the copper wires, shielding materials are pasted on the outer sides of the copper wires, when the signal transmission requirement is high, the copper wire specification and the flatness of the shielding materials pasted on the hot melt adhesive films can influence the delay difference of transmitted signals, the delay difference of the conductors is high, and the product quality is difficult to meet the increasingly improved market demand gradually.
Therefore, in combination with the above-mentioned technical problems, it is necessary to provide a new technical solution.
Disclosure of Invention
The utility model aims to provide a low-delay-difference flexible flat cable which is lower in delay difference, less in process flow and capable of effectively controlling production cost.
In order to solve the technical problems, the utility model provides a low-delay-difference flexible flat cable, which comprises the following specific technical scheme:
the flexible flat cable with low delay difference comprises a conductor, wherein the upper side and the lower side of the conductor are respectively provided with a film capable of being used as a printing surface and a shielding film without a printing surface, two ends of the conductor are provided with reinforcing plates, and the reinforcing plates are positioned on one side of the conductor provided with the shielding film;
the shielding film comprises an aluminum foil layer, PET layers are arranged on the upper side face and the lower side face of the aluminum foil layer, and a high-viscosity hot melt adhesive layer is further arranged on the outer side of the PET layer close to one side of the conductor so that the shielding film and the conductor are adhered and fixed.
Preferably, the conductor is composed of a plurality of parallel flat copper wires which are arranged at intervals, the size of the flat copper wires is 0.037 x 0.28mm, the upper limit of tolerance of the flat copper wires is +0.015mm, and the lower limit of tolerance of the flat copper wires is 0mm.
Preferably, a composite adhesive layer is further arranged between the aluminum foil layer and the PET layer, and the PET layer is fixedly connected with the aluminum foil layer through the composite adhesive layer.
Preferably, the coating comprises a base film PET layer, and at least one flame-retardant resin layer is arranged on the base film PET layer.
Preferably, the conductor, the shielding film and the reinforcing plate are bonded by hot pressing through a heating wheel.
Preferably, the lengths of the coating film and the shielding film are smaller than the length of the conductor so that two ends of the flat copper wire are exposed, and the reinforcing plate is fixedly bonded with the conductor.
The low-delay-difference flexible flat cable has the following beneficial effects:
according to the low-delay-difference flexible flat cable, the shielding film is adopted to replace a common leather film to be assembled with the conductor, the improved flat copper wire size is matched, so that the delay difference of the cable is lower, the effect is more excellent, the shielding film is simple and practical in structure, the process steps during assembly can be reduced, the production cost is saved, meanwhile, the interference of cable signal transmission is reduced after the width of the flat copper wire in the conductor is reduced, and the crosstalk data is improved;
additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a low latency flexible flat cable;
FIG. 2 is a top view of the low latency flexible flat cable of FIG. 1;
FIG. 3 is a bottom view of the low latency flexible flat cable of FIG. 1;
FIG. 4 is a schematic view of the shielding film of FIG. 1;
FIG. 5 is a schematic view of the coating film of FIG. 1;
FIG. 6 is a delay data plot of the low delay flexible flat cable of FIG. 1;
fig. 7 is a cross-talk data graph of the low delay differential flexible flat cable of fig. 1.
Wherein 1-conductor; 2-shielding film; 21-an aluminum foil layer; 22-a composite adhesive layer; a 23-PET layer; 24-a high-viscosity hot melt adhesive layer; 3-coating; 31-a flame retardant resin layer; 32-PET base film layer; 4-reinforcing plates.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
Examples
Referring to fig. 1 to 5, a low delay flexible flat cable includes a conductor 1, wherein the upper and lower sides of the conductor are respectively provided with a film 3 capable of being used as a printing surface and a shielding film 2 without a printing surface, two ends of the conductor are provided with reinforcing plates 4, and the reinforcing plates are positioned on one side of the conductor provided with the shielding film;
the shielding film 2 comprises an aluminum foil layer 21, and PET layers 23 are respectively arranged on the upper side and the lower side of the aluminum foil layer, wherein a high-viscosity hot melt adhesive layer 24 is further arranged on the outer side of the PET layer close to one side of the conductor so that the shielding film and the conductor are adhered and fixed.
The conductor 1 is composed of a plurality of flat copper wires which are parallel and are distributed at intervals, the size of each flat copper wire is 0.037 x 0.28mm, the upper limit of tolerance of each flat copper wire is +0.015mm, and the lower limit of tolerance of each flat copper wire is 0mm.
And a composite adhesive layer 22 is further arranged between the aluminum foil layer 21 and the PET layer 23, and the PET layer is fixedly connected with the aluminum foil layer through the composite adhesive layer.
The film 3 comprises a base film PET layer 32, and at least one flame-retardant resin layer 31 is arranged on the base film PET layer.
The conductor 1, the shielding film 2 and the reinforcing plate 4 are bonded by hot pressing through a heating wheel.
The lengths of the leather film 3 and the shielding film 2 are smaller than the length of the conductor 1 so that two ends of the flat copper wire are exposed, and the reinforcing plate is fixedly bonded with the conductor.
The low delay difference flexible flat cable of this embodiment adopts the shielding film with aluminum foil layer to replace the conventional film to fix on the conductor, and changes the size of flat copper wire in the conventional conductor, so that the delay difference of the cable is greatly improved (as shown in fig. 6). In addition, the wider the conductor is, the worse the signal transmission crosstalk effect is, the crosstalk effect is improved after the width dimension of the flat copper wire in the conductor is reduced to 0.28mm, and the specific data is shown in fig. 7, meanwhile, the conventional connector section of the matching cable is 0.2mm in width, the spacing tolerance is +/-0.02 mm, the width of the flat copper wire in the conductor is not lower than 0.24mm as much as possible, and the bonding spacing tolerance is +/-0.04 mm when the conductor is bonded and assembled, so that the flat copper wire with the width of 0.28+0.015/-0mm is the optimal dimension generated on the premise of not increasing the production cost.
The beneficial effects of the utility model are as follows: the shielding film is adopted to replace a common leather film to be assembled with the conductor, the size of the flat copper wire after being matched with the improvement is lower, the cable delay difference is enabled to be more excellent, the shielding film is simple and practical in structure, the process steps during assembly can be reduced, the production cost can be saved, meanwhile, the interference of cable signal transmission is reduced after the width of the flat copper wire in the conductor is reduced, and the crosstalk data is improved.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications and alternatives to the above embodiments may be made by those skilled in the art within the scope of the utility model.
Claims (6)
1. A low-delay-difference flexible flat cable is characterized in that: the conductor comprises a conductor (1), wherein a leather film (3) capable of being used as a printing surface and a shielding film (2) without a printing surface are respectively arranged on the upper side and the lower side of the conductor, reinforcing plates (4) are arranged at two ends of the conductor, and the reinforcing plates are positioned on one side of the conductor, on which the shielding film is arranged;
the shielding film (2) comprises an aluminum foil layer (21), PET layers (23) are arranged on the upper side face and the lower side face of the aluminum foil layer, and a high-viscosity hot melt adhesive layer (24) is further arranged on the outer side of the PET layer close to one side of the conductor so that the shielding film and the conductor are adhered and fixed.
2. The low-latency flexible flat cable according to claim 1, wherein: the conductor (1) is composed of a plurality of flat copper wires which are parallel and are distributed at intervals, the size of each flat copper wire is 0.037 x 0.28mm, the upper limit of tolerance of each flat copper wire is +0.015mm, and the lower limit of tolerance of each flat copper wire is 0mm.
3. The low-latency flexible flat cable according to claim 1, wherein: and a composite adhesive layer (22) is further arranged between the aluminum foil layer (21) and the PET layer (23), and the PET layer is fixedly connected with the aluminum foil layer through the composite adhesive layer.
4. The low-latency flexible flat cable according to claim 1, wherein: the coating (3) comprises a base film PET layer (32), and at least one flame-retardant resin layer (31) is arranged on the base film PET layer.
5. The low-latency flexible flat cable according to claim 1, wherein: the conductor (1), the shielding film (2) and the reinforcing plate (4) are bonded through hot pressing of a heating wheel.
6. The low-latency flexible flat cable according to claim 1, wherein: the lengths of the leather film (3) and the shielding film (2) are smaller than the length of the conductor (1) so that two ends of the flat copper wire are exposed, and the reinforcing plate is fixedly bonded with the conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321635391.5U CN220324165U (en) | 2023-06-27 | 2023-06-27 | Low-delay-difference flexible flat cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321635391.5U CN220324165U (en) | 2023-06-27 | 2023-06-27 | Low-delay-difference flexible flat cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220324165U true CN220324165U (en) | 2024-01-09 |
Family
ID=89410916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321635391.5U Active CN220324165U (en) | 2023-06-27 | 2023-06-27 | Low-delay-difference flexible flat cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220324165U (en) |
-
2023
- 2023-06-27 CN CN202321635391.5U patent/CN220324165U/en active Active
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