CN104733823A - Bendable flat transmission line - Google Patents
Bendable flat transmission line Download PDFInfo
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- CN104733823A CN104733823A CN201510174122.7A CN201510174122A CN104733823A CN 104733823 A CN104733823 A CN 104733823A CN 201510174122 A CN201510174122 A CN 201510174122A CN 104733823 A CN104733823 A CN 104733823A
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- transmission line
- flat transmission
- heart yearn
- metal level
- bending region
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Abstract
The invention provides a bendable flat transmission line which at least comprises a core line. The core line at least comprises a signal line, and metal layers are arranged on the upper side and the lower side of the core line; the flat transmission line is divided into a bent region and non-bent regions; the portions, which are positioned in the bent region, of the metal layers on the outermost side of the flat transmission line are partially or completely dug; the width of the portion, which is positioned in the bent region, of the core line is larger than the widths of the portions, which are positioned in the non-bent regions, of the core line. Medium layers are arranged between the metal layers and the core line, and an adhesion layer, which is used for being connected with the metal layers on the upper side and the lower side of the core line is further arranged between a side of the core line and the metal layers; the metal layers in the flat transmission line are connected with each other by metalized via holes, and the bent region is free of metalized via holes. The bendable flat transmission line has the advantages that the portions, which are positioned in the bent region, of the metal layers are partially or completely dug, the bent region of the flat transmission line is free of the metalized via holes, and accordingly breaking risks of the transmission line can be reduced.
Description
Technical field
The present invention relates to transmission line design technical field, particularly a kind of bent flat transmission line.
Background technology
In recent years, increasing wireless terminal device have employed the design of low section, that is to say that the thickness of terminal is more and more less.Be used for connecting and the transmission line of transmitting radio frequency signal also more and more thinner.The diameter of coaxial line is less, and the loss in unit length is larger, and terminal equipment needs the coaxial line that diameter is little as far as possible, and this is conflicting with reducing the wastage.How reduce the space shared by transmission line when not increasing loss, be our facing challenges as far as possible.A good selection with the transmission that strip line realizes signal.
Strip line is applied on notebook computer, and be used for transmission notebook back cover to the signal on notebook fuselage, some can long-term bending.In order to make holding wire mate with the element impedance such as antenna, power amplifier, the live width of strip line is usually smaller, and long-term bending easily makes holding wire rupture.Managing overstriking holding wire, make it not easily be fractureed, take into account holding wire simultaneously and mate with the element impedance such as antenna, power amplifier, is our facing challenges.
Summary of the invention
In order to solve the problem, the invention provides a kind of bent flat transmission line, described heart yearn at least includes a holding wire, and the upper and lower side of described heart yearn is provided with metal level; Described flat transmission line is divided into bending region and non-bending region; In bending region, cutouts or all cut out on the outermost metal level of flat transmission line, and the heart yearn width in bending region is greater than the width of non-bending region internal core wire.
Preferably, between described metal level and described heart yearn, be provided with dielectric layer, side and the adhesive layer be also provided with between described metal level for being connected heart yearn upper and lower side metal level of described heart yearn.
Preferably, the outermost of described flat transmission line is also provided with insulating barrier.
Preferably, connected by metallization via hole between the metal level in described flat transmission line.
Preferably, bend in the flat transmission line in region and metallization via hole is not set.
Preferably, in bending region, cutouts on the outermost metal level of flat transmission line, and the position of cutouts is corresponding with the position of described heart yearn.
Preferably, in bending region, on the outermost metal level of flat transmission line, cutouts is formed and nettedly engraves hole.
Preferably, in bending region, the outermost metal level of flat transmission line all cuts out.
Preferably, described heart yearn by be positioned at non-bending region the first heart yearn and be positioned at bending region the second heart yearn form, and described second heart yearn be positioned at same layer by the metal level of cutouts.
Preferably, the first heart yearn is connected by the via hole that metallizes with between described second heart yearn.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
(1) a kind of bent flat transmission line provided by the invention, by cutouts on the metal level of bending region outermost layer or all cut out, simultaneously in order to keep the consistency of whole transmission line impedance, ensure the performance of transmission line, add the width of bending region internal core wire, thus reduce transmission line internal core wire by the risk fractureed;
(2) a kind of bent flat transmission line provided by the invention, the flat transmission line in bending region is arranged without metallization cable-through hole, thus reduce bending regional metal composition, thus be conducive to reducing the appearance that breakage phenomenon appears in flat transmission line after frequent bending.
Accompanying drawing explanation
By reference to the accompanying drawings, by hereafter state detailed description, more clearly can understand above-mentioned and other feature and advantage of the present invention, wherein:
Fig. 1 is the vertical view of flat transmission line in the embodiment of the present invention one;
Fig. 2 is the sectional view of flat transmission line in the embodiment of the present invention one;
Fig. 3 is the structural representation one of the first metal layer in the embodiment of the present invention one;
Fig. 4 is the structural representation of the second metal level in the embodiment of the present invention one;
Fig. 5 is the structural representation two of the first metal layer in the embodiment of the present invention one;
Fig. 6 is the structural scheme of mechanism of the first metal layer in the embodiment of the present invention two;
Fig. 7 is the close-up schematic view at A place in Fig. 6.
Symbol description:
1-heart yearn
11-first heart yearn
12-second heart yearn
21-the first metal layer
211-rectangle engraves hole
212-is netted engraves hole
22-second metal level
31-first insulating barrier
32-second insulating barrier
41-first medium layer
42-second dielectric layer
5-adhesive layer
6-metallizes via hole.
Embodiment
See the accompanying drawing that the embodiment of the present invention is shown, hereafter in more detail the present invention will be described.But the present invention can realize in many different forms, and should not be construed as by the restriction in the embodiment of this proposition.On the contrary, it is abundant and complete open in order to reach for proposing these embodiments, and makes those skilled in the art understand scope of the present invention completely.In these accompanying drawings, for clarity sake, may be exaggerated size and the relative size in layer and region.
Embodiment one
With reference to Fig. 1-5, the invention provides a kind of bent flat transmission line, be set to bend region by that section of bending long-term in flat transmission line, all the other sections are set to non-bending region, as shown in fig. 1; The present invention is by making it not easily be fractureed to the structural design of bending area transmission line.
Usually, flat transmission line at least includes one deck heart yearn, and heart yearn is made up of one or more holding wire, and the upper and lower layer of heart yearn is provided with metal level, can share a metal level, be not restricted herein between adjacent two layers heart yearn; Also dielectric layer is provided with, the upside of heart yearn or be also provided with adhesive layer between downside and dielectric layer between metal level and heart yearn; An entirety is connected to form by metallization via hole between metal level in flat transmission line; The outermost layer of flat transmission line is also provided with insulating barrier.Wherein, the width of heart yearn is less than the width of all the other each layers.
In the present embodiment, as shown in Figure 2, flat transmission line includes one deck heart yearn 1, the upper and lower side of heart yearn 1 is respectively arranged with the first metal layer 21 and the second metal level 22, be provided with between the first metal layer 21 and heart yearn 1 between first medium layer 41, second metal level 22 and heart yearn 1 and be provided with second dielectric layer 42; Be provided with adhesive layer 5 between second dielectric layer and heart yearn 1, heart yearn 1, for connecting first medium layer 41 and the second dielectric layer 42 of heart yearn 1 both sides, is pressed between the two and fixes by adhesive layer 5; Be connected by some metallization via holes 6 between the first metal layer 21 with the second metal level 22, and metallization via hole 6 is through first medium layer 41, second dielectric layer 42 and adhesive layer 5; The outer surface outer surface of the first metal layer 21 being also provided with the first insulating barrier 31, second metal level 22 is also provided with the second insulating barrier 32.
Wherein, in bending region, cutouts on the first metal layer 21 in flat transmission line, as shown in Figure 3, on the first metal layer 21, cutouts is rectangular, makes the first metal layer 21 to be formed a rectangle and engraves hole 211, and wherein the shape of cutouts can be other shapes, as rhombus etc., as long as ensure that cutouts is positioned at the place corresponding with heart yearn position; At least larger than the width of heart yearn about 10 times of the width of the rectangle part cut out, to ensure that cutouts is enough large, to reduce the impact of the first metal layer 21 on heart yearn 1 holding wire; Now, the second metal level 22 is a complete structure, as shown in Figure 4.Because cutouts on the first metal layer 21 certainly will affect the impedance of bending region transmission line, the present invention by suitably increasing the width of heart yearn 1, thus ensures that transmission line impedance is consistent.The present invention, by cutouts on the first metal layer 21 in bending region, makes for keeping the consistency of whole transmission line impedance that the width of heart yearn is corresponding to broaden, thus the holding wire reducing transmission line internal core wire is by the risk fractureed.
In the present embodiment, also can on the second metal level 22 cutouts, the first metal layer 21 is a complete structure; When the metal level of flat transmission line is more than time two-layer, as long as ensure cutouts on outermost metal level, the metal level of mid portion is complete, can design as the case may be, not be restricted herein.In addition, on metal level, the shape of cutouts can be designed to rectangle hollow out 211, also can be designed to nettedly engrave hole 212, as shown in Figure 5; On metal level, the shape of cutouts is not also restricted, and can design as the case may be.
In the present embodiment, flat transmission line in bending region is arranged without metallization cable-through hole 6, the present invention by reducing the setting of metallization cable-through hole 6, thus reduces metal composition in bending region, thus is conducive to reducing the appearance that breakage phenomenon appears in flat transmission line after frequent bending.
Embodiment two
With reference to shown in Fig. 6-7, the present embodiment is the conversion embodiment of embodiment one; In the present embodiment, the first metal layer 21 part of flat transmission line in bending region is all cut out, as shown in Figure 6.The present invention by reducing the setting of metal level, thus prevents flat transmission line from being fractureed.
In the present embodiment, heart yearn 1 is divided into the first heart yearn 11 being positioned at non-bending region, the second heart yearn 12 being positioned at bending region, be connected by the via hole 13 that metallizes between first heart yearn 11 with the second heart yearn 12, and make the second heart yearn 12 be positioned at same layer with the first metal layer 21, namely make the second heart yearn 12 be positioned at the second metal level 21 cutouts; The present invention passes through such scheme, when not increasing transmission line gross thickness, make heart yearn width increase as far as possible, when same thickness, design in the present embodiment is wider than the design in embodiment one, width depending on the gross thickness of each layer, thus further reduces heart yearn by the risk fractureed.Wherein, the width of the second heart yearn 12 is greater than the width of the first heart yearn 11, for ensureing the consistency of whole transmission line impedance, thus ensure that the performance of transmission line.
All the other versions of the bent transmission line provided in the present embodiment, all can refer to the description in embodiment one, repeat no more herein.
In sum, the invention provides a kind of bent flat transmission line, heart yearn at least includes a signal, and the upper and lower side of heart yearn is provided with metal level; Flat transmission line is divided into bending region and non-bending region; In bending region, cutouts or all cut out on the outermost metal level of flat transmission line; And the heart yearn width in bending region is greater than the width of non-bending region internal core wire.Dielectric layer is provided with, side and the adhesive layer be also provided with between metal level for being connected heart yearn upper and lower side metal level of heart yearn between metal level and heart yearn; Connected by metallization via hole between metal level in flat transmission line, bending is not provided with metallization via hole in region.A kind of bent flat transmission line provided by the invention, by cutouts or all cut out on the metal level in bending region, the width of heart yearn is broadened, and the flat transmission line in bending region is arranged without metallization cable-through hole, reduce transmission line by the risk fractureed.
Those skilled in the art should be understood that the present invention can realize with other concrete forms many and not depart from the spirit or scope of the present invention.Although describe embodiments of the invention, the present invention should be understood and should not be restricted to these embodiments, within the spirit and scope of the invention that those skilled in the art can define as appended claims, make change and amendment.
Claims (10)
1. a bent flat transmission line, at least includes one deck heart yearn, and described heart yearn at least includes a holding wire, and the upper and lower side of described heart yearn is provided with metal level; It is characterized in that, described flat transmission line is divided into bending region and non-bending region; In bending region, cutouts or all cut out on the outermost metal level of flat transmission line, and the heart yearn width in bending region is greater than the width of non-bending region internal core wire.
2. according to bent flat transmission line according to claim 1, it is characterized in that, dielectric layer is provided with, side and the adhesive layer be also provided with between described metal level for being connected heart yearn upper and lower side metal level of described heart yearn between described metal level and described heart yearn.
3. according to bent flat transmission line according to claim 1, it is characterized in that, the outermost of described flat transmission line is also provided with insulating barrier.
4. according to bent flat transmission line according to claim 1, it is characterized in that, connected by metallization via hole between the metal level in described flat transmission line.
5. according to the bent flat transmission line described in claim 1 or 4, it is characterized in that, the flat transmission line in bending region does not arrange metallization via hole.
6., according to bent flat transmission line according to claim 1, it is characterized in that, in bending region, cutouts on the outermost metal level of flat transmission line, and the position of cutouts is corresponding with the position of described heart yearn.
7. according to bent flat transmission line according to claim 1, it is characterized in that, in bending region, on the outermost metal level of flat transmission line, cutouts is formed and nettedly engraves hole.
8. according to bent flat transmission line according to claim 1, it is characterized in that, in bending region, the outermost metal level of flat transmission line all cuts out.
9. according to bent flat transmission line according to claim 8, it is characterized in that, described heart yearn by be positioned at non-bending region the first heart yearn and be positioned at bending region the second heart yearn form, and described second heart yearn be positioned at same layer by the metal level of cutouts.
10., according to bent flat transmission line according to claim 9, it is characterized in that, the first heart yearn is connected by the via hole that metallizes with between described second heart yearn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174122.7A CN104733823A (en) | 2015-04-14 | 2015-04-14 | Bendable flat transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174122.7A CN104733823A (en) | 2015-04-14 | 2015-04-14 | Bendable flat transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104733823A true CN104733823A (en) | 2015-06-24 |
Family
ID=53457464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510174122.7A Pending CN104733823A (en) | 2015-04-14 | 2015-04-14 | Bendable flat transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104733823A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934670A (en) * | 2015-07-02 | 2015-09-23 | 上海安费诺永亿通讯电子有限公司 | A low-loss flat transmission line |
| CN107690225A (en) * | 2017-09-11 | 2018-02-13 | 广东乐芯智能科技有限公司 | A kind of FPC pads bending structure |
| CN110556205A (en) * | 2018-06-01 | 2019-12-10 | 凡甲电子(苏州)有限公司 | Flat data transmission cable |
| WO2021119943A1 (en) * | 2019-12-16 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | Transmission line and terminal device |
| WO2021119942A1 (en) * | 2019-12-16 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | Transmission line and terminal device |
| CN114071868A (en) * | 2021-11-08 | 2022-02-18 | 上海安费诺永亿通讯电子有限公司 | FPC stripline and electronic equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934670A (en) * | 2015-07-02 | 2015-09-23 | 上海安费诺永亿通讯电子有限公司 | A low-loss flat transmission line |
| CN104934670B (en) * | 2015-07-02 | 2018-04-27 | 上海安费诺永亿通讯电子有限公司 | A kind of low-loss flat transmission line |
| CN107690225A (en) * | 2017-09-11 | 2018-02-13 | 广东乐芯智能科技有限公司 | A kind of FPC pads bending structure |
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| WO2021119943A1 (en) * | 2019-12-16 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | Transmission line and terminal device |
| WO2021119942A1 (en) * | 2019-12-16 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | Transmission line and terminal device |
| CN114071868A (en) * | 2021-11-08 | 2022-02-18 | 上海安费诺永亿通讯电子有限公司 | FPC stripline and electronic equipment |
| CN114071868B (en) * | 2021-11-08 | 2024-05-03 | 上海安费诺永亿通讯电子有限公司 | FPC strip line and electronic equipment |
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Application publication date: 20150624 |
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