CN109714882A - Mobile terminal and flexible circuit board - Google Patents
Mobile terminal and flexible circuit board Download PDFInfo
- Publication number
- CN109714882A CN109714882A CN201811419360.XA CN201811419360A CN109714882A CN 109714882 A CN109714882 A CN 109714882A CN 201811419360 A CN201811419360 A CN 201811419360A CN 109714882 A CN109714882 A CN 109714882A
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- conductive
- circuit board
- ground plane
- flexible
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Abstract
The invention discloses a kind of flexible circuit board; including conductive base and the protective film for being covered on the surfaces of conductive substrates; the conductive base includes the conductive circuit layer being stacked and ground plane; the conductive circuit layer and the ground plane mutually insulated; the both ends of the conductive circuit layer are respectively equipped with a row along the spaced apart conductive terminal of conductive circuit layer width direction, and the both ends of the ground plane are respectively equipped with ground terminal.Flexible circuit board of the invention has ground plane as Grounding, earth-return circuit can be formed with the circuit board at both ends respectively by the ground terminal at both ends, the negative electrical charge of antenna can be efficiently transferred to the radio-frequency devices on mainboard by the Grounding of flexible circuit board, to guarantee antenna performance.
Description
Technical field
The present invention relates to signal transmission technology field more particularly to a kind of mobile terminal and flexible circuit board.
Background technique
Cell Phone Design cost pressure is increasing at present, in handset front case component, in order to guarantee antenna ground performance and
Overall structural performance will increase the metal plate of the materials such as a monolith steel plate or magnesium alloy, make the PCB (printing in antenna shrapnel region
Wiring board) and RF (Radio Frequency, radio frequency) device PCB all by steel plate be grounded, to reach the most short of current loop
Path drops low-loss effect to reach promotion antenna performance.
In actual product manufacturing, in order to save design cost, it would be desirable to by the steel plate or magnesium alloy in mobile phone
Plate removes, but can cause a problem in this way, and GND (Ground, ground terminal) route of antenna for mobile phone is in antenna platelet and mainboard
Between be to disconnect, antenna loop electric current cannot effectively return to mainboard PA (PowerAmplifier, power amplifier), lead to day
Line can not form Net long wave radiation, influence the realization of antenna performance.It is therefore desirable to still guarantee original on the basis of saving steel plate
Antenna performance, this mobile phone design is a very big challenge.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of mobile terminal and flexible circuit board, can save
Remove the radiance for guaranteeing antenna under the premise of metal plate.
In order to achieve the above purpose, present invention employs the following technical solutions:
A kind of flexible circuit board, including conductive base and the protective film for being covered on the surfaces of conductive substrates, the conduction
Substrate includes the conductive circuit layer being stacked and ground plane, the conductive circuit layer and the ground plane mutually insulated, described
The both ends of conductive circuit layer are respectively equipped with a row along the spaced apart conductive terminal of conductive circuit layer width direction, described to connect
The both ends on stratum are respectively equipped with ground terminal.
As one of embodiment, the conductive base further includes flexible substrates and glue-line, the flexible substrates, institute
It states between conductive circuit layer, every two layers adjacent structure of the ground plane through one layer of glue-line bonding.
As one of embodiment, the both ends of the ground plane are respectively provided with two spaced apart ground terminals
Son, and the conductive terminal at every end is respectively positioned between two adjacent ground terminals.
As one of embodiment, the conductive circuit layer is adhered to the flexible substrates surface on one side, described
Ground plane is adhered to the another side in the conductive circuit layer far from the flexible substrates.
As one of embodiment, the conductive circuit layer is completely covered in the orthographic projection of the ground plane.
As one of embodiment, the conductive base includes at least two layers ground plane, at least described in two layers
It is electrically connected between ground plane by the first conductive via.
As one of embodiment, the ground plane is multilayer, is led between the every two layers adjacent ground plane
Cross the electrical connection of at least one first conductive via.
As one of embodiment, the neither ipsilateral of the flexible substrates is respectively provided at least one layer of ground plane,
First conductive via runs through the flexible substrates and simultaneously by connecing described in two layers of first conductive via electrical connection
Conductive circuit layer between stratum, and with the conductive circuit layer insulation set.
As one of embodiment, the conductive base includes at least two layers conductive circuit layer, described in two layers
It is electrically connected between conductive circuit layer by the second conductive via.
Another object of the present invention is to provide a kind of mobile terminal, including it is first circuit board, second circuit board, described soft
Property wiring board, the second circuit board is equipped with antenna, and the first circuit board, the second circuit board be equipped with the area Lu Tong,
The flexible circuit board is electrically connected the first circuit board and the second circuit board by the conductive terminal at both ends, and logical
The ground terminal for crossing both ends is contacted with the area Lu Tong of the first circuit board, the second circuit board respectively.
Flexible circuit board of the invention has ground plane as Grounding, can be by the ground terminal at both ends respectively with two
The circuit board at end forms earth-return circuit, and the negative electrical charge of antenna can be efficiently transferred to lead by the Grounding of flexible circuit board
Radio-frequency devices on plate, to guarantee antenna performance.
Detailed description of the invention
Fig. 1 is that a kind of flexible circuit board of the invention applies the structural schematic diagram in mobile terminal；
Fig. 2 is a kind of structural schematic diagram of flexible circuit board of the invention；
Fig. 3 is the stepped construction schematic diagram of the flexible circuit board of the embodiment of the present invention 1；
Fig. 4 is the cross-sectional view of the flexible circuit board of the embodiment of the present invention 1；
Fig. 5 is the stepped construction schematic diagram of the flexible circuit board of the embodiment of the present invention 2；
Fig. 6 is the cross-sectional view of the flexible circuit board of the embodiment of the present invention 2.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Refering to fig. 1 and Fig. 2, mobile terminal of the invention mainly include flexible circuit board 10, the 20, second electricity of first circuit board
Road plate 30, flexible circuit board 10 are connected between first circuit board 20 and second circuit board 30, can be equipped on second circuit board 30
Antenna, antenna shrapnel etc., main control chip and radio-frequency module can be equipped on first circuit board 20, and flexible circuit board 10 passes through both ends
Conductive terminal 101 is electrically connected with first circuit board 20 and second circuit board 30；First circuit board 20, second circuit board 30 are equipped with
The area Lu Tong, flexible circuit board 10 pass through the ground terminal 102 at the both ends dew copper with first circuit board 20, second circuit board 30 respectively
Area contacts and is grounded.
By the way that the ground terminal of flexible circuitry board ends point can be passed through using the ground plane of flexible circuit board as Grounding
Earth-return circuit is not formed with the circuit board at both ends, the negative electrical charge of antenna can effectively be passed by the Grounding of flexible circuit board
The radio-frequency devices on mainboard are transported to, to ensure that antenna performance.
Embodiment 1
As shown in figure 3, specifically, the flexible circuit board 10 of the present embodiment is single side plate structure comprising conductive base 11
With the protective film 12 for being covered on the one of surface of conductive base 11.
As shown in figure 4, conductive base 11 has the conductive circuit layer 112 being stacked and ground plane 113, conductive circuit layer
112 with 113 mutually insulated of ground plane, the both ends of conductive circuit layer 112 are respectively equipped with a row along 112 width direction of conductive circuit layer
Spaced apart conductive terminal 101, the both ends of ground plane 113 are respectively equipped with ground terminal 102.
As a kind of preferred embodiment of the present embodiment, conductive base 11 specifically includes flexible substrates 111, conductor wire
Road floor 112, ground plane 113 and glue-line 114, conductive circuit layer 112, ground plane 113 are successively set on flexible substrates from bottom to top
On 111, flexible substrates 111, conductive circuit layer 112 pass through one layer of glue-line between every two layers adjacent structure of ground plane 113
114 realize bonding.That is, conductive circuit layer 112 is adhered to 111 surface of flexible substrates on one side, ground plane 113 is adhered to conductor wire
Far from the another side of flexible substrates 111 on road floor 112.Protective film 12 generally includes another layer of flexible substrates and is formed in the flexibility
The glue-line for adherency of substrate surface, protective film 12 are fitted in outermost 113 surface of ground plane by the glue-line.
In ground plane 113, the both ends of length direction are respectively provided with two spaced apart ground terminals 102 in end,
The conductive terminal 101 at every end is linearly arranged, the golden finger for grafting conduction, and two ground terminals 102 at every end are formed
Corresponding conductive terminal 101 is located in the interval between two ground terminals 102 respectively, three keeps certain interval.
So that in flexible circuit board 10 in use, the conductive terminal 101 at both ends can be separately connected the first circuit by board to board connector
Plate 20 and second circuit board 30, the ground terminal 102 at both ends are directly contacted with the area Lu Tong of corresponding circuit board and are grounded back
Road, ground terminal 102 will not influence the use of board to board connector.
Preferably, the distance of two ground terminals 102 of the same end is in 10-20mm, and flexible circuit board 10 is apart from antenna feed
The distance of point is 20-30mm.Conductive circuit layer 112, ground plane 113 can use identical material, for example, copper foil, glue-line 114
It can be epoxy resin, flexible substrates 111 can be polyimides or PET.
As one of embodiment, conductive circuit layer 112, ground plane 113 is completely covered in the orthographic projection of ground plane 113
It is fitted in by one layer of glue-line 114 in the conductive circuit layer 112 of lower section, and conductive circuit layer 112 is protected in wherein.
In addition, conductive base 11 can have at least two layers of ground plane 113, can lead between ground plane 113 and ground plane 113
The electrical connection of the first conductive via is crossed, the quantity of the first conductive via between two layers of ground plane 113 can be with more than one, Ke Yishi
Existing more reliable charge transmission channel still can be by the ground plane that closes on when wherein one layer of ground plane 113 is broken
113 are grounded.
The formation of first conductive via specifically first makes while running through the through-hole of two layers of ground plane 113, then exists
Conductive channel is formed by way of electro-deposition or plating metal (such as copper facing) in through-hole.To save production process, at least one the
One conductive via runs through all ground planes 113, and all ground planes 113 are electrically connected.It specifically first disposably produces same
When through all ground planes 113 through-hole, conductive material is then formed in through-hole again.
It should be noted that the number of plies of ground plane 113 is not limited to one or two layers, or multilayer, every two layers of phase
It can be electrically connected by least one the first conductive via between adjacent ground plane 113.Conductive base 11 can also include at least
Two layers of conductive circuit layer 112 can use similar method between two layers of conductive circuit layer 112, pass through the second conductive via electricity
Connection.Here, it is emphasized that, the second conductive via and 113 insulation set of ground plane, the first conductive via and conducting wire
112 insulation set of layer, so that being in isolation between ground plane 113 and conductive circuit layer 112, the two is independent of each other.
Embodiment 2
As shown in figure 5, different from embodiment 1, the flexible circuit board 10 of the present embodiment is two-sided plate structure comprising conductive
Substrate 11 and the protective film 12 for being respectively overlay in the neither same surface of conductive base 11.
It is located in the middle flexible substrates 111 as shown in fig. 6, conductive base 11 specifically includes, is located at flexible substrates 111
Neither ipsilateral conductive circuit layer 112, ground plane 113 and glue-line 114 up and down, conductive circuit layer 112, ground plane 113 are successively set
It sets in flexible substrates 111, flexible substrates 111, conductive circuit layer 112 are led between every two layers adjacent structure of ground plane 113
It crosses one layer of glue-line 114 and realizes bonding.Two layers of protective film 12 is fitted in 113 table of ground plane of top and bottom by glue-line respectively
Face.
The neither ipsilateral of flexible substrates 111 is respectively provided at least one layer of ground plane 113, and the first conductive via 113h runs through simultaneously
Conductive circuit layer 112 between flexible substrates 111 and two layers of the ground plane 113 for passing through the first conductive via 113h electrical connection, and
With 112 insulation set of conductive circuit layer.Similarly, the every side of flexible substrates 111 of conductive base 11 also can have at least two layers
Ground plane 113 can be electrically connected between at least two layers of ground plane 113, two layers of conductive circuit layer 112 by the first conductive via 113h
Between can use similar method, pass through the second conductive via 112h be electrically connected.Second conductive via 112h and ground plane 113
Insulation set, the first conductive via 113h and 112 insulation set of conductive circuit layer, so that ground plane 113 and conductive circuit layer 112
Between be in isolation, the two is independent of each other.Here a preferably at least first conductive via 113h is electrically connected all simultaneously
Ground plane 113, at least one second conductive via 112h is electrically connected all conductive circuit layers 112 simultaneously, the first conductive mistake
Hole 113h, the second conductive via 112h are simultaneously through intermediate flexible substrates 111.
In conclusion flexible circuit board of the invention has ground plane as Grounding, the ground terminal at both ends can be passed through
Son forms earth-return circuit with the circuit board at both ends respectively, and the negative electrical charge of antenna can be effective by the Grounding of flexible circuit board
Ground is transmitted to the radio-frequency devices on mainboard, to guarantee antenna performance.Meanwhile it is also settable in the conductive base of flexible circuit board
There is ground plane/conductive circuit layer of composite construction, so that circuit loop is relatively reliable, service life is also longer.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (10)
1. a kind of flexible circuit board, which is characterized in that including conductive base (11) and be covered on the conductive base (11) surface
Protective film (12), the conductive base (11) includes the conductive circuit layer (112) being stacked and ground plane (113), described
Conductive circuit layer (112) and the ground plane (113) mutually insulated, the both ends of the conductive circuit layer (112) are respectively equipped with one
Row is along the spaced apart conductive terminal of the conductive circuit layer (112) width direction (101), the both ends of the ground plane (113)
It is respectively equipped with ground terminal (102).
2. flexible circuit board according to claim 1, which is characterized in that the conductive base (11) further includes flexible substrates
(111) and glue-line (114), the flexible substrates (111), the conductive circuit layer (112), the ground plane (113) every two
Pass through one layer of glue-line (114) bonding between the adjacent structure of layer.
3. flexible circuit board according to claim 2, which is characterized in that the both ends of the ground plane (113) are respectively provided with two
A spaced apart ground terminal (102), and the conductive terminal (101) at every end is respectively positioned on described in adjacent two and connects
Between ground terminal (102).
4. flexible circuit board according to claim 2, which is characterized in that the one side of the conductive circuit layer (112) adheres to
In the flexible substrates (111) surface, the ground plane (113) is adhered on the conductive circuit layer (112) far from described soft
The another side of property substrate (111).
5. flexible circuit board according to claim 4, which is characterized in that the orthographic projection of the ground plane (113) is covered completely
Cover the conductive circuit layer (112).
6. according to any flexible circuit board of claim 2-5, which is characterized in that the conductive base (11) includes at least
Two layers of ground plane (113) is electrically connected between at least two layers ground plane (113) by the first conductive via (113h).
7. flexible circuit board according to claim 6, which is characterized in that the ground plane (113) is multilayer, every two layers of phase
It is electrically connected by least one first conductive via (113h) between the adjacent ground plane (113).
8. flexible circuit board according to claim 6, which is characterized in that the flexible substrates (111) it is neither ipsilateral each
Equipped at least one layer of ground plane (113), first conductive via (113h) simultaneously through the flexible substrates (111) and
The conductive circuit layer (112) between two layers of ground plane (113) being electrically connected by first conductive via (113h), and
With the conductive circuit layer (112) insulation set.
9. flexible circuit board according to claim 6, which is characterized in that the conductive base (11) includes at least two layers institute
It states conductive circuit layer (112), is electrically connected between two layers of conductive circuit layer (112) by the second conductive via (112h).
10. a kind of mobile terminal, which is characterized in that including first circuit board (20), second circuit board (30), claim 1-9
Any flexible circuit board, the second circuit board (30) are equipped with antenna, the first circuit board (20), described second
Circuit board (30) is equipped with the area Lu Tong, and the flexible circuit board is electrically connected described the by the conductive terminal (101) at both ends
One circuit board (20) and the second circuit board (30), and by the ground terminal (102) at both ends respectively with described first
The area the Lu Tong contact of circuit board (20), the second circuit board (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419360.XA CN109714882B (en) | 2018-11-26 | 2018-11-26 | Mobile terminal and flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419360.XA CN109714882B (en) | 2018-11-26 | 2018-11-26 | Mobile terminal and flexible circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109714882A true CN109714882A (en) | 2019-05-03 |
| CN109714882B CN109714882B (en) | 2022-06-10 |
Family
ID=66255126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811419360.XA Active CN109714882B (en) | 2018-11-26 | 2018-11-26 | Mobile terminal and flexible circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109714882B (en) |
Cited By (4)
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| CN110418497A (en) * | 2019-08-22 | 2019-11-05 | 京信通信技术(广州)有限公司 | Pcb board splicing construction and antenna assembly |
| CN113452814A (en) * | 2021-05-21 | 2021-09-28 | 荣耀终端有限公司 | Transmission assembly and foldable electronic equipment |
| CN114585150A (en) * | 2022-03-16 | 2022-06-03 | 安捷利（番禺）电子实业有限公司 | Reinforcing sheet, antenna assembly and radio frequency connecting assembly |
| CN114585150B (en) * | 2022-03-16 | 2024-06-11 | 安捷利（番禺）电子实业有限公司 | Reinforcing sheet, antenna assembly and radio frequency connection assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110418497A (en) * | 2019-08-22 | 2019-11-05 | 京信通信技术(广州)有限公司 | Pcb board splicing construction and antenna assembly |
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| CN114585150A (en) * | 2022-03-16 | 2022-06-03 | 安捷利（番禺）电子实业有限公司 | Reinforcing sheet, antenna assembly and radio frequency connecting assembly |
| CN114585150B (en) * | 2022-03-16 | 2024-06-11 | 安捷利（番禺）电子实业有限公司 | Reinforcing sheet, antenna assembly and radio frequency connection assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109714882B (en) | 2022-06-10 |
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