CN109743835A - A kind of flexible flat cable - Google Patents
A kind of flexible flat cable Download PDFInfo
- Publication number
- CN109743835A CN109743835A CN201910027781.6A CN201910027781A CN109743835A CN 109743835 A CN109743835 A CN 109743835A CN 201910027781 A CN201910027781 A CN 201910027781A CN 109743835 A CN109743835 A CN 109743835A
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- Prior art keywords
- conductor layer
- layer
- flexible flat
- flat cable
- conductor
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Abstract
The invention discloses a kind of flexible flat cables.Flexible flat cable includes: the first conductor layer, the second conductor layer and third conductor layer, and the second conductor layer is set between the first conductor layer and third conductor layer；The first medium layer being set between the first conductor layer and the second conductor layer；The second dielectric layer being set between the second conductor layer and third conductor layer；It is set to first insulating layer of first conductor layer far from first medium layer side；It is set to second insulating layer of the third conductor layer far from second dielectric layer side；Wherein, signal wire and ground unit are provided in the second conductor layer, ground unit is set to the outside of signal wire and does not contact with signal wire；First conductor layer is connect with ground unit by the first connecting hole, and third conductor layer is connect with ground unit by the second connecting hole.The flexible flat cable can reduce the interference for the external electromagnetic signal being subject to, and improve the transmission performance of flexible flat cable.
Description
Technical field
The present embodiments relate to signal transmission technology field more particularly to a kind of flexible flat cables.
Background technique
Flexible flat cable (Flexible Flat Cable, FFC) is a kind of using polyethylene terephthalate
(PET) insulating materials and very thin tin plating flat copper wire produce novel number made of pressing by high-tech automation equipment
According to cable, with soft, random bending fold, thickness is thin, small in size, connection is simple, convenient disassembly, easily solution electromagnetic shielding
(EMI) the advantages that.
However, flexible flat cable is in signals transmission, and especially during high frequency signal transmission, flexible flat
Cable easily by the interference of external electromagnetic signal, affects the transmission performance of flexible flat cable.
Summary of the invention
The present invention provides a kind of flexible flat cable, can reduce the dry of the external electromagnetic signal that flexible flat cable is subject to
It disturbs, improves the transmission performance of flexible flat cable.
In a first aspect, the embodiment of the invention provides a kind of flexible flat cables, comprising:
First conductor layer, the second conductor layer and third conductor layer, the second conductor layer are set to the first conductor layer and third conductor
Between layer；The first medium layer being set between the first conductor layer and the second conductor layer；It is set to the second conductor layer and third is led
Second dielectric layer between body layer；It is set to first insulating layer of first conductor layer far from first medium layer side；It is set to
Second insulating layer of three conductor layers far from second dielectric layer side；
Wherein, be provided with signal wire and ground unit in the second conductor layer, ground unit be set to the outside of signal wire and not with
Signal wire contact；First conductor layer is connect with ground unit by the first connecting hole, and third conductor layer and ground unit pass through the
The connection of two connecting holes.
Optionally, ground unit is earth conductor.
Optionally, signal wire includes at least the first subsignal line, the second subsignal line, and is set to the first subsignal line
And the second conductor for ground connection between subsignal line, wherein the first subsignal line and the second subsignal are linear poor in a pair
Sub-signal line.
Optionally, the first signal island and the first gap around the first signal island are provided in the first conductor layer；Third
Second signal island and the second gap around second signal island are provided in conductor layer；Further include:
The third connecting hole of the first conductor layer and third conductor layer is penetrated through, for being connected to the first signal island, signal wire and second
Signal island.
Optionally, the single or double of first medium layer is provided with layers of copper, and/or, the single or double of second dielectric layer
It is provided with layers of copper.
Optionally, further includes:
The adhesive layer being set between first medium layer and the second conductor layer；And/or
The adhesive layer being set between first medium layer and the first conductor layer；And/or
The adhesive layer being set between second dielectric layer and the second conductor layer；And/or
The adhesive layer being set between second dielectric layer and third conductor layer.
Optionally, the conductor for ground connection is provided between adjacent signal wire.
Optionally, the first connecting hole flexible flat cable projection in the plane and the second connecting hole in flexible flat
Cable projection in the plane be not overlapped.
Optionally, the first connecting hole flexible flat cable projection in the plane and the second connecting hole in flexible flat
Cable projection in the plane be overlapped.
Optionally, the first connecting hole and the perforation of the second connecting hole.
For the present invention by increasing ground unit in the outside of signal wire, external electromagnetic signal can be isolated to letter in ground unit
The interference of number line, the crosstalk between anti-stop signal, reaches the interference for reducing the external electromagnetic signal that flexible flat cable is subject to, is promoted
The effect of the transmission performance of flexible flat cable.
Detailed description of the invention
Fig. 1 is a kind of the schematic diagram of the section structure of flexible flat cable provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the section structure of another flexible flat cable provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of the section structure of another flexible flat cable provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the section structure of another flexible flat cable provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of the section structure provided in an embodiment of the present invention into a kind of flexible flat cable；
Fig. 6 is a kind of overlooking structure diagram of flexible flat cable provided in an embodiment of the present invention；
Fig. 7 is the overlooking structure diagram of another flexible flat cable provided in an embodiment of the present invention；
Fig. 8 is the overlooking structure diagram of another flexible flat cable provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Meanwhile unless explicitly described, otherwise the deformation of word " comprising " and such as "comprising" or " having " should be understood that
Include the element to imply, but is not excluded for any other element.
It should be noted that the "and/or" mentioned in the embodiment of the present invention refers to " it include listed by one or more correlations
Any and all combinations of project.Various assemblies are described with " first ", " second ", " third " etc. in the embodiment of the present invention, but
It is that these components should not be limited by these terms.These terms are only used to distinguish a component with another component.Also,
Unless the context clearly indicates otherwise, otherwise singular "one", "an" and " should () " be also intended to include plural form.
In addition, the following each embodiments of the present invention can be individually performed, it can also be combined with each other and hold between each embodiment
Row, the embodiment of the present invention are not specifically limited this.
The embodiment of the present invention provides a kind of flexible flat cable, can reduce the external electromagnetic letter that flexible flat cable is subject to
Number interference, improve the transmission performance of flexible flat cable.
In the following, will be described in detail the structure of flexible flat cable provided in an embodiment of the present invention.
Fig. 1 is a kind of the schematic diagram of the section structure of flexible flat cable provided in an embodiment of the present invention, flexible flat cable
It include: the first conductor layer 10, the second conductor layer 11 and third conductor layer 12, the second conductor layer 11 is set to the first conductor layer 10
Between third conductor layer 12；The first medium layer 13 being set between the first conductor layer 10 and the second conductor layer 11；It is set to
Second dielectric layer 14 between second conductor layer 11 and third conductor layer 12；The first conductor layer 10 is set to far from first medium layer
First insulating layer 15 of 13 sides；It is set to second insulating layer 16 of the third conductor layer 12 far from 14 side of second dielectric layer.
Wherein, it is provided with signal wire 110 and ground unit 111 in the second conductor layer 11, ground unit 111 is set to signal
It the outside of line 110 and is not contacted with signal wire 110, as shown in Figure 1, ground unit 111 is set to the left and right two of signal wire 110
There is gap in side between ground unit 111 and signal wire 110；First conductor layer 10 passes through the first connecting hole 20 with ground unit 111
Connection, third conductor layer 12 are connect with ground unit 111 by the second connecting hole 21.
Specifically, the first conductor layer 10, the second conductor layer 11, third conductor layer 12 and first medium layer 13 and second are situated between
Matter layer 14 is the energy transmission region of flexible flat cable, and ground unit 111 can be earth conductor.
Optionally, at least one hole can be set in first medium layer 13 and second dielectric layer 14, hole is distributed in institute
110 surrounding of signal wire is stated, the magnetic distribution situation around signal wire 110 can be improved in this way, divide electric field line more uniformly
Cloth reduces the transmission loss of flexible flat cable around signal wire 110.
For the embodiment of the present invention by increasing ground unit in the outside of signal wire, external electromagnetic letter can be isolated in ground unit
Interference number to signal wire, the crosstalk between anti-stop signal, reaches the dry of the external electromagnetic signal for reducing that flexible flat cable is subject to
It disturbs, improves the effect of the transmission performance of flexible flat cable.
It should be understood that the first connecting hole 20 flexible flat cable projection in the plane and the second connecting hole 21 exist
Flexible flat cable projection in the plane can not be overlapped, as shown in Figure 1.It certainly, is that the present invention is implemented in conjunction with Fig. 1, Fig. 2
The schematic diagram of the section structure for another flexible flat cable that example provides, unlike flexible flat cable shown in FIG. 1, the
One connecting hole 20 flexible flat cable projection in the plane and the second plane where flexible flat cable of connecting hole 21
On projection be overlapped.It further, is the section of another flexible flat cable provided in an embodiment of the present invention in conjunction with Fig. 2, Fig. 3
Structural schematic diagram, unlike flexible flat cable shown in Fig. 2, the first connecting hole 20 and the perforation of the second connecting hole 21, such as
This, the first connecting hole 20 and the second connecting hole 21 can be obtained by one-time process manufacture, save the system of flexible flat cable
Cause this.
Specifically, Fig. 4 is that the cross-section structure of another flexible flat cable provided in an embodiment of the present invention shows in conjunction with Fig. 1
It is intended to, wherein signal wire 110 includes at least the first subsignal line A, the second subsignal line B, and is set to the first subsignal line
The conductor C for ground connection between A and the second subsignal line B, wherein the first subsignal line A and the second subsignal line B forms one
To differential signal line.
In addition, Fig. 5 is that the cross-section structure provided in an embodiment of the present invention into a kind of flexible flat cable is illustrated in conjunction with Fig. 1
Figure, unlike flexible flat cable shown in FIG. 1, flexible flat cable further include:
The adhesive layer 17 being set between first medium layer 13 and the second conductor layer 11；And/or
The adhesive layer 17 being set between first medium layer 13 and the first conductor layer 10；And/or
The adhesive layer 17 being set between second dielectric layer 14 and the second conductor layer 11；And/or
The adhesive layer 17 being set between second dielectric layer 14 and third conductor layer 12.
Wherein, Fig. 5 is drawn so that adhesive layer 17 is set between first medium layer 13 and the second conductor layer 11 as an example
's.
Adhesive layer 17 is used to increase the viscosity between dielectric layer and conductor layer.Adhesive layer 17 is low temperature adhesion layer, and use is low
Warm jointing material is made, and pressing-in temp is low, short the time required to heating less than 220 degrees Celsius even more small (such as 200 degrees Celsius),
Energy is saved.
Further, the single or double of first medium layer 13 is provided with layers of copper, and/or, the single side of second dielectric layer 14
Or two-sided it is provided with layers of copper.
It should be noted that then should when certain of first medium layer 13 and/or second dielectric layer 14 are provided with layers of copper on one side
Face can be not provided with adhesive layer.
Specifically, when first medium layer 13 is provided with layers of copper and first medium layer 13 close to the first conductor layer 10 on one side
Close to when being not provided with layers of copper on one side of the second conductor layer 11, further includes: be set to first medium layer 13 and the second conductor layer 11
Between adhesive layer；
When first medium layer 13 is provided with layers of copper and first medium layer 13 close to the first conductor close to the second conductor layer 11 on one side
10 when being not provided with layers of copper on one side of layer, further includes: the adhesive layer being set between first medium layer 13 and the first conductor layer 10；
When second dielectric layer 14 is provided with layers of copper and second dielectric layer 14 close to the second conductor close to third conductor layer 12 on one side
11 when being not provided with layers of copper on one side of layer, further includes: the adhesive layer being set between second dielectric layer 14 and the second conductor layer 11；
When second dielectric layer 14 is provided with layers of copper and second dielectric layer 14 close to third conductor close to the second conductor layer 11 on one side
12 when being not provided with layers of copper on one side of layer, further includes: the adhesive layer being set between second dielectric layer 14 and third conductor layer 12；
When first medium layer 13 two-sided is provided with layers of copper and second dielectric layer 14 two-sided and is provided with layers of copper, flexible flat
Adhesive layer can be not provided in cable.
Fig. 6 is a kind of overlooking structure diagram of flexible flat cable provided in an embodiment of the present invention.As shown in fig. 6, soft
The both ends of first conductor layer 10 of property flat cable are respectively arranged with the first signal island 30 and around the of the first signal islands 30
One gap 31.
Fig. 7 is the overlooking structure diagram of another flexible flat cable provided in an embodiment of the present invention.As shown in fig. 7,
Second signal island 40 and the second gap 41 around second signal island 40 are provided in third conductor layer 12.
Fig. 8 is the overlooking structure diagram of another flexible flat cable provided in an embodiment of the present invention.As shown in figure 8,
Further include: the third connecting hole 22 of perforation the first conductor layer 10 and third conductor layer 30, for being connected to the first signal island 30, signal
Line 110 and second signal island 40.
The embodiment of the present invention provides a kind of flexible flat cable, comprising: the first conductor layer, the second conductor layer and third are led
Body layer, the second conductor layer are set between the first conductor layer and third conductor layer；It is set to the first conductor layer and the second conductor layer
Between first medium layer；The second dielectric layer being set between the second conductor layer and third conductor layer；It is set to the first conductor
First insulating layer of the layer far from first medium layer side；It is set to second insulation of the third conductor layer far from second dielectric layer side
Layer；Wherein, be provided with signal wire and ground unit in the second conductor layer, ground unit be set to the outside of signal wire and not with
Signal wire contact；First conductor layer is connect with ground unit by the first connecting hole, and third conductor layer and ground unit pass through the
The connection of two connecting holes.By increasing ground unit in the outside of signal wire, external electromagnetic signal can be isolated to letter in ground unit
The interference of number line, the crosstalk between anti-stop signal, reaches the interference for reducing the external electromagnetic signal that flexible flat cable is subject to, is promoted
The effect of the transmission performance of flexible flat cable.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of flexible flat cable characterized by comprising
First conductor layer, the second conductor layer and third conductor layer, second conductor layer be set to first conductor layer and
Between the third conductor layer；The first medium layer being set between first conductor layer and second conductor layer；Setting
Second dielectric layer between second conductor layer and the third conductor layer；First conductor layer is set to far from described
First insulating layer of first medium layer side；It is exhausted to be set to the third conductor layer second far from the second dielectric layer side
Edge layer；
Wherein, it is provided with signal wire and ground unit in second conductor layer, the ground unit is set to the signal wire
Outside and do not contacted with the signal wire；First conductor layer is connect with the ground unit by the first connecting hole, institute
It states third conductor layer and is connect with the ground unit by the second connecting hole.
2. flexible flat cable according to claim 1, which is characterized in that the ground unit is earth conductor.
3. flexible flat cable according to claim 1, which is characterized in that the signal wire includes at least the first subsignal
Line, the second subsignal line, and be set between the first subsignal line and the second subsignal line for ground connection
Conductor, wherein the first subsignal line and the linear differential signal line in a pair of second subsignal.
4. flexible flat cable according to claim 1, which is characterized in that be provided with the first letter in first conductor layer
Number island and the first gap around first signal island；It is provided with second signal island in the third conductor layer and surrounds
Second gap on the second signal island；Further include:
The third connecting hole for penetrating through first conductor layer and third conductor layer, for being connected to first signal island, the letter
Number line and the second signal island.
5. flexible flat cable according to claim 1, which is characterized in that the single or double of the first medium layer is set
It is equipped with layers of copper, and/or, the single or double of the second dielectric layer is provided with layers of copper.
6. flexible flat cable according to claim 1, which is characterized in that further include:
The adhesive layer being set between the first medium layer and second conductor layer；And/or
The adhesive layer being set between the first medium layer and first conductor layer；And/or
The adhesive layer being set between the second dielectric layer and second conductor layer；And/or
The adhesive layer being set between the second dielectric layer and the third conductor layer.
7. flexible flat cable according to claim 1, which is characterized in that be arranged between the adjacent signal wire useful
In the conductor of ground connection.
8. flexible flat cable according to claim 1, which is characterized in that first connecting hole is in the flexible flat
Cable projection in the plane and second connecting hole the flexible flat cable projection in the plane be not overlapped.
9. flexible flat cable according to claim 1, which is characterized in that first connecting hole is in the flexible flat
Cable projection in the plane and second connecting hole the flexible flat cable projection in the plane be overlapped.
10. flexible flat cable according to claim 9, which is characterized in that first connecting hole and described second connects
Meet Kong Guantong.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811108666 | 2018-09-21 | ||
| CN2018111086663 | 2018-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109743835A true CN109743835A (en) | 2019-05-10 |
Family
ID=66364416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910027781.6A Pending CN109743835A (en) | 2018-09-21 | 2019-01-07 | A kind of flexible flat cable |
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| CN (1) | CN109743835A (en) |
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| CN106488642A (en) * | 2015-08-27 | 2017-03-08 | 富葵精密组件(深圳)有限公司 | Flexible circuit board and preparation method thereof |
| CN106572587A (en) * | 2015-10-08 | 2017-04-19 | 富葵精密组件(深圳)有限公司 | Flexible circuit board and manufacturing method thereof |
| CN108336593A (en) * | 2012-06-29 | 2018-07-27 | 安费诺有限公司 | The radio frequency connector of low-cost and high-performance |
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2019
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110286192A1 (en) * | 2005-10-18 | 2011-11-24 | Kazuhiro Kashiwakura | Printed wiring board and method of suppressing power supply noise thereof |
| CN101370351A (en) * | 2007-08-17 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Flexible circuit board |
| CN102548183A (en) * | 2010-12-30 | 2012-07-04 | 北大方正集团有限公司 | Multilayer circuit board and manufacturing method thereof |
| CN108336593A (en) * | 2012-06-29 | 2018-07-27 | 安费诺有限公司 | The radio frequency connector of low-cost and high-performance |
| CN103731973A (en) * | 2012-10-10 | 2014-04-16 | 株式会社村田制作所 | High-frequency signal line and method for manufacturing same |
| CN204596531U (en) * | 2015-04-22 | 2015-08-26 | 上海安费诺永亿通讯电子有限公司 | A kind of novel low loss line |
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| CN105263255A (en) * | 2015-09-25 | 2016-01-20 | 深圳崇达多层线路板有限公司 | Electrostatic discharge resistant circuit board with electromagnetic compatibility |
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Application publication date: 20190510 |
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