CN201910272U - FFC (flexible flat cable) high-frequency transmission wire shielding membrane and FFC high-frequency transmission wire - Google Patents
FFC (flexible flat cable) high-frequency transmission wire shielding membrane and FFC high-frequency transmission wire Download PDFInfo
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- CN201910272U CN201910272U CN2010201014329U CN201020101432U CN201910272U CN 201910272 U CN201910272 U CN 201910272U CN 2010201014329 U CN2010201014329 U CN 2010201014329U CN 201020101432 U CN201020101432 U CN 201020101432U CN 201910272 U CN201910272 U CN 201910272U
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Abstract
The utility model discloses an FFC (flexible flat cable) high-frequency transmission wire shielding membrane and an FFC high-frequency transmission wire. The FFC high-frequency transmission wire shielding membrane has a stratified structure and comprises a surface layer insulating membrane, a metal foil layer and a lower layer insulating membrane layer, wherein the upper surface of the metal foil layer is compounded with the surface layer insulating membrane; an adhesive layer is arranged between the metal foil layer and the lower layer insulating membrane; the lower surface of the metal foil layer is bonded with the upper surface of the lower layer insulating membrane by the adhesive layer; and the lower surface of the lower layer insulating membrane comprises a layer of hot-melt adhesive. In the utility model, the characteristic impedance of the FFC high-frequency transmission wire can be controlled conveniently, the problem that the FFC high-frequency transmission wire is difficult to meet the performance requirement due to mismatch of the dielectric coefficient of a PET (poly ethylene terephthalate) glue membrane and an EMI (Electro-Magnetic Interference) insulating material can be solved, the production efficiency of the FFC high-frequency transmission wire can be improved, and the production cost of the FFC high-frequency transmission wire can be reduced.
Description
[technical field]
The utility model relates to the flexible data transmission cable, relates in particular to a kind of shielding film and FFC high frequency transmission line of FFC high frequency transmission line.
[background technology]
Flexible flat cable (FFC, English full name is: Flexible F1at Cable) be a kind of with PET insulating material and zinc-plated flat copper wire as thin as a wafer by the new types of data cable that the pressing of high-tech automation equipment production line forms, have softness, random bending fold, thin thickness, volume is little, connection is simple, convenient disassembly, easily solve advantage such as electromagnetic shielding.Flexible flat cable can be selected lead number and spacing arbitrarily, on line is convenient, significantly reduce the volume of electronic product, reduce production cost, enhance productivity, be suitable for most between moving-member and the mainboard, pcb board between the pcb board, make the usefulness of data transmission cable in the miniaturization electrical equipment equipment, be widely used in being connected between various printer port of printer and the mainboard at present, the signal transmission and the plate plate of products such as plotter, scanner, photocopier, sound equipment, liquid crystal electrical equipment, the various video disc players of facsimile machine connect.In modern electrical equipment, almost ubiquitous.
As shown in Figure 1, traditional flexible flat cable (FFC) is made of last PET glued membrane 101, flattened medial copper cash 102 and following PET glued membrane 103.The frame mode that this kind is traditional need be sticked on various electronics auxiliary material at the pet sheet layer for the EMI (electromagnetic interference) and the characteristic impedance control aspect of flexible flat cable, could satisfy the electric property that required by electronic product is asked.So, adopt this kind frame mode to need the segmental machining operation, the efficiency function is low, processing cost is higher.Because the structure of traditional FFC control EMI and characteristic impedance is subjected to composition material PET of FFC own and electromagnetic interference insulated with material dielectric coefficient Different Effects, be difficult to form the impedance matching of wire rod and signal emitting-source, therefore this traditional structure be unfavorable for product large quantities of, promote the use of on a large scale.
[summary of the invention]
The technical problems to be solved in the utility model provides a kind of shielding film of FFC high frequency transmission line, be used to control the characteristic impedance of FFC high frequency transmission line, eliminate the FFC high frequency transmission line and be not difficult to reach the problem of properties of product requirement because PET glued membrane and EMI insulating material dielectric coefficient match, and the prouctiveness of raising FFC high frequency transmission line, the production cost of reduction FFC high frequency transmission line.
The technical problems to be solved in the utility model provides a kind of control characteristic impedance of being convenient to, the FFC high frequency transmission line that production cost is low.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of FFC high frequency transmission line shielding film, be layer structure, comprise top layer dielectric film, metal foil layer and lower floor's dielectric film, the upper surface of metal foil layer and top layer dielectric film are compound, comprise adhesion agent layer between metal foil layer and the lower floor's dielectric film, the lower surface of metal foil layer is bonding by the upper surface of adhesion agent layer and lower floor's dielectric film, and the lower surface of lower floor's dielectric film comprises one deck PUR.
Above-described FFC high frequency transmission line shielding film, the material of described top layer dielectric film and lower floor's dielectric film all is the PET material.Described metal foil layer is an aluminium foil layer.Described PUR is the oleoresin PUR.Described solid is the polyurethane solid.
A kind of technical scheme of FFC high frequency transmission line is, comprise insulating barrier, copper wire layer and following insulating barrier, described copper wire layer is clipped between insulating barrier and the following insulating barrier, the described insulating barrier of going up is above-mentioned FFC high frequency transmission line shielding film, and the PUR of FFC high frequency transmission line shielding film lower floor dielectric film lower surface and copper wire layer, time insulating barrier are bonding.
Above-described FFC high frequency transmission line, the material of described top layer dielectric film and lower floor's dielectric film all is the PET material.Described metal foil layer is an aluminium foil layer.Described PUR is the oleoresin PUR.Described solid is the polyurethane solid.
The shielding film of the utility model FFC high frequency transmission line replaces original dielectric film, and the FFC high frequency transmission line carries out the control characteristic impedance with regard to no longer needing to stick on other materials on FFC high frequency transmission line top layer more in use;
The insulating barrier that use PET adds solid in the shielding film of FFC high frequency transmission line makes insulating barrier that unified insulative dielectric coefficient be arranged not only as the insulation top layer of copper cash but also the dielectric constant pairing material that impedance is necessarily required as FFC high frequency transmission line control characteristic.When changing PET insulative dielectric constant and can not match, the impedance matching that the working lining that can make it by the thickness that changes solid to insulate reaches product requires needed dielectric constant.
When the different product impedance matching of control requires, can be PET film thickness, the number of plies by dielectric material in the change working lining, also can go control or reach the required characteristic impedance value of impedance matching by mode or the aluminum foil thickness of adjusting solid thickness or the mode of using other metal materials.
[description of drawings]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the longitudinal sectional drawing of prior art flexible data transmission cable.
Fig. 2 is the longitudinal sectional drawing of the utility model embodiment F FC high frequency transmission line.
[embodiment]
In the embodiment of the utility model FFC high frequency transmission line shown in Figure 2, PETG (PET) dielectric film 204 (lower floor's dielectric film) is coated with the insulating supporting structure that one deck oleoresin PUR 205 makes it to become the shielding film of FFC high frequency transmission line with conventional heat seeling coating form;
The actual metal that reduces the impedance of FFC conductor characteristics partly be with another PET film as top layer dielectric film 201, the lower surface of top layer dielectric film 201 and the aluminium foil 202 compound aluminium foil insulation film structures that become actual reduction FFC wire rod itself;
After above-mentioned two kinds of semi-finished product are finished, select for use polyurethane series solid 203 (molecular formula: CH3COOC2H5 composition: polyurethane resin, ethyl acetate) that the not coated face of supporting construction SI semi-insulation film 204 is combined with the aluminum foil film conducting surface, form the shielding film of FFC high frequency transmission line.
By the FFC make-up machine shielding film of FFC high frequency transmission line is carried out thermoforming as insulating barrier 207 under the epithelial membrane of FFC and copper wire layer 206 and the PET, the PUR 205 of FFC high frequency transmission line shielding film lower floor dielectric film 204 lower surfaces is bonded together copper wire layer 206, following insulating barrier 207, can make the FFC high frequency transmission line of structure shown in Figure 2.
In the present embodiment, top layer insulating material 201 also can adopt the PI film.The PI film has better heat-resisting quantity than the PET film, but too high because of cost price in the middle of the practical application, is unfavorable for producing in enormous quantities.And present embodiment top layer dielectric film, lower floor's dielectric film, insulating barrier all adopts the PET film down, and raw material variety is single, and low price is convenient to produce, and with original FFC dielectric film be commaterial, help replacing original FFC dielectric film.
Another characteristics of present embodiment are that the lower surface of metal foil layer is bonding by the upper surface of adhesion agent layer and lower floor's dielectric film.PUR needs can play after the high temperature melting effect of adhesion, and the bonding high temperature that then do not need of solid gets final product in the scope of 30-60 degree.If on the FFC make-up machine, be easy to produce the above-mentioned unsettled defective of adhesive layer because the hot-forming temperature of make-up machine and pressure produce to flow with the sticker of PUR as compound PET and aluminium foil.Metal forming can adopt aluminium foil, Copper Foil, silver foil or tinfoil paper.
Claims (10)
1. FFC high frequency transmission line shielding film, be layer structure, it is characterized in that, comprise top layer dielectric film, metal foil layer and lower floor's dielectric film, the upper surface of metal foil layer and top layer dielectric film are compound, comprise adhesion agent layer between metal foil layer and the lower floor's dielectric film, the lower surface of metal foil layer is bonding by the upper surface of adhesion agent layer and lower floor's dielectric film, and the lower surface of lower floor's dielectric film comprises one deck PUR.
2. FFC high frequency transmission line shielding film according to claim 1 is characterized in that the material of described top layer dielectric film and lower floor's dielectric film all is the PET material.
3. FFC high frequency transmission line shielding film according to claim 1 is characterized in that described metal foil layer is an aluminium foil layer.
4. FFC high frequency transmission line shielding film according to claim 1 is characterized in that described PUR is the oleoresin PUR.
5. FFC high frequency transmission line shielding film according to claim 1 is characterized in that described solid is the polyurethane solid.
6. FFC high frequency transmission line, comprise insulating barrier, copper wire layer and following insulating barrier, described copper wire layer is clipped between insulating barrier and the following insulating barrier, it is characterized in that, the described insulating barrier of going up is the described FFC high frequency transmission line of claim 1 shielding film, and the PUR of FFC high frequency transmission line shielding film lower floor dielectric film lower surface and copper wire layer, time insulating barrier are bonding.
7. FFC high frequency transmission line according to claim 6 is characterized in that, the material of described top layer dielectric film and lower floor's dielectric film all is the PET material.
8. FFC high frequency transmission line according to claim 6 is characterized in that, described metal foil layer is an aluminium foil layer.
9. FFC high frequency transmission line according to claim 6 is characterized in that, described PUR is the oleoresin PUR.
10. FFC high frequency transmission line according to claim 6 is characterized in that, described solid is the polyurethane solid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201014329U CN201910272U (en) | 2010-01-22 | 2010-01-22 | FFC (flexible flat cable) high-frequency transmission wire shielding membrane and FFC high-frequency transmission wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201014329U CN201910272U (en) | 2010-01-22 | 2010-01-22 | FFC (flexible flat cable) high-frequency transmission wire shielding membrane and FFC high-frequency transmission wire |
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| CN201910272U true CN201910272U (en) | 2011-07-27 |
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| CN2010201014329U Expired - Fee Related CN201910272U (en) | 2010-01-22 | 2010-01-22 | FFC (flexible flat cable) high-frequency transmission wire shielding membrane and FFC high-frequency transmission wire |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964224A (en) * | 2010-08-26 | 2011-02-02 | 白璐 | Shielding material for flexible flat cable (FFC) high-frequency transmission line and high-frequency transmission line |
| CN102621197A (en) * | 2012-03-27 | 2012-08-01 | 华瑞科学仪器(上海)有限公司 | Flexible base film, electrochemical sensor and electrochemical sensor array |
| CN102956246A (en) * | 2011-08-17 | 2013-03-06 | 日立-Lg数据存储韩国公司 | Slim type optical disc drive using a flexible flat cable |
| CN105161179A (en) * | 2015-08-17 | 2015-12-16 | 深圳闻信电子有限公司 | High-frequency signal FFC adhesive film and technological process for processing adhesive film |
| CN106384620A (en) * | 2016-11-14 | 2017-02-08 | 安费诺电子装配（厦门）有限公司 | High-speed flat cable with high bending memory capability and manufacturing method thereof |
| CN106710690A (en) * | 2016-12-26 | 2017-05-24 | 南昌联能科技有限公司 | Electromagnetic shielding film for cables, manufacturing method of electromagnetic shielding film and manufacturing method of cables |
-
2010
- 2010-01-22 CN CN2010201014329U patent/CN201910272U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964224A (en) * | 2010-08-26 | 2011-02-02 | 白璐 | Shielding material for flexible flat cable (FFC) high-frequency transmission line and high-frequency transmission line |
| CN102956246A (en) * | 2011-08-17 | 2013-03-06 | 日立-Lg数据存储韩国公司 | Slim type optical disc drive using a flexible flat cable |
| CN102621197A (en) * | 2012-03-27 | 2012-08-01 | 华瑞科学仪器(上海)有限公司 | Flexible base film, electrochemical sensor and electrochemical sensor array |
| CN102621197B (en) * | 2012-03-27 | 2014-03-26 | 华瑞科学仪器(上海)有限公司 | Flexible base film, electrochemical sensor and electrochemical sensor array |
| CN105161179A (en) * | 2015-08-17 | 2015-12-16 | 深圳闻信电子有限公司 | High-frequency signal FFC adhesive film and technological process for processing adhesive film |
| CN106384620A (en) * | 2016-11-14 | 2017-02-08 | 安费诺电子装配（厦门）有限公司 | High-speed flat cable with high bending memory capability and manufacturing method thereof |
| CN106710690A (en) * | 2016-12-26 | 2017-05-24 | 南昌联能科技有限公司 | Electromagnetic shielding film for cables, manufacturing method of electromagnetic shielding film and manufacturing method of cables |
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| CF01 | Termination of patent right due to non-payment of annual fee |