CN202190458U - Flexible printed circuit board - Google Patents
Flexible printed circuit board Download PDFInfo
- Publication number
- CN202190458U CN202190458U CN2011203223588U CN201120322358U CN202190458U CN 202190458 U CN202190458 U CN 202190458U CN 2011203223588 U CN2011203223588 U CN 2011203223588U CN 201120322358 U CN201120322358 U CN 201120322358U CN 202190458 U CN202190458 U CN 202190458U
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- circuit board
- flexible print
- print circuit
- conductive layer
- layer
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Abstract
The utility model discloses a flexible printed circuit board including a welding end, and the welding end of the flexible printed circuit board comprises a substrate, a first conducting layer and a second conducting layer both arranged on two sides of the substrate, a plurality of through holes for conducting the first conducting layer and the second conducting layer, and a first covering layer arranged on the first conducting layer and exposed out of the through holes. The flexible printed circuit board further comprises a second covering layer arranged on the second conducting layer and exposed out of the through holes. In the flexible printed circuit board provided by the utility model, the second covering layer is additionally arranged on the surface of the second conducting layer to enhance the strength of the region, so as to reinforce the mechanical properties of the flexible printed circuit board and prevent the flexible printed circuit board from breakage or fracture in the transport or use process.
Description
Technical field
The utility model relates to the printed substrate field, particularly relates to a kind of flexible print circuit board.
Background technology
(Liquid Crystal Display LCD) has the little power consumption of low pressure, panelized, miniature portable and characteristics such as integrated, is widely used in the various data processing equipments because liquid crystal indicator.Said liquid crystal indicator generally includes liquid crystal panel, be arranged on surface behind the liquid crystal panel backlight module, be arranged on source electrode portion and grid part on the liquid crystal panel; This grid part comprises the signal drive IC that is used to apply signal; This source electrode portion comprises and is used to apply the source drive IC of data-signal with display image that this signal drive IC and source drive IC are referred to as drive IC.
In recent years, liquid crystal indicator develops to lightening and compact direction gradually, because traditional band electric conductor encapsulation pliability is relatively poor, causes it to be not suitable for being applied to lightening and compact liquid crystal indicator.Therefore, in the prior art, how liquid crystal indicator has adopted the preferable wiring board of pliability, and for example (Flexible Printed Circuit Board FPCB), realizes being electrically connected between display panels and the drive IC to flexible print circuit board.Said flexible print circuit board is the flexible printed circuit that adopts flexible insulating substrate to process, and has pliable and tough frivolous characteristic.Than rigid printed substrate, this flexible print circuit board can free bend, coiling, folding, can require to arrange arbitrarily according to space layout, and move arbitrarily at three dimensions, thereby reach integrated that the components and parts assembling is connected with lead.
At present, the connected mode that flexible print circuit board is commonly used has three kinds: hot pressing opposite sex conductive adhesive film (Bonding by Anisotropic Conductive Film), welding (Bondingby Soldering), connection zero-force connector (Connecting with ZIF connectors).Owing to adopt welding manner with low cost; And reliability is high when using; Said flexible print circuit board adopts mode and other element of welding usually, as printed circuit board (PCB) (Printed Circuit Board, PCB) or another flexible print circuit board be electrically connected.
As shown in Figure 1, it is the structural representation of the flexible print circuit board welding ends of prior art.At welding ends, said flexible print circuit board 100 comprises: base material 110; Be arranged at first conductive layer 121 and second conductive layer 122 of base material 110 both sides respectively; The some via holes 120 that are used for conducting first conductive layer 121 and second conductive layer 122; And be arranged at the cover layer 130 on first conductive layer 121, and said cover layer 130 does not all cover this first conductive layer 121, but exposes via hole 120, and the material of said first conductive layer 121 and second conductive layer 122 for example is a Copper Foil.Said base material 110 comprise first surface (front) and with said first surface opposing second surface (reverse side); Said first conductive layer 121 and second conductive layer 122 cover on the first surface and second surface of base material 110 through adhesive layer 141,142 respectively, and said cover layer 130 covers on first conductive layer 121 through adhesive layer 143.
Please refer to Fig. 2; It is the tow sides sketch map of the flexible print circuit board of prior art; Wherein, the left side sketch map is the sketch map of flexible print circuit board 100 first surfaces (front), and the right side sketch map is the sketch map of flexible print circuit board 100 second surfaces (reverse side).As shown in Figure 2, at welding ends, the said flexible print circuit board 100 first positive conductive layers 121 cap rock 130 that is not covered covers fully, but exposes the part with through hole 120 in the port, and this part is made up of many golden finger 121a; Second conductive layer 122 of reverse side is to be made up of many golden finger 122a; Many positive golden finger 121a are generally corresponding one by one with many golden finger 122a of reverse side, through via hole 120 conductings.When welding time, scolder filled vias 120 makes many golden finger 122a of positive many golden finger 121a and reverse side link together.The length ratio that constitutes the golden finger 121a of first conductive layer 121 constitutes the little H1 of length of the golden finger 122a of second conductive layer 122, and wherein H1 for example is 0.5mm～0.8mm.
Please refer to Fig. 3, it is welded to the sketch map on the substrate for the flexible print circuit board of prior art.In the process of welding, scolder couples together the flexible print circuit board 100 and the pad 11 of substrate 10 through via hole 120, thereby makes said flexible print circuit board 100 and substrate 10 realize being electrically connected function.
Yet; In the transportation or use after flexible print circuit board welding, flexible print circuit board in plug, move or pull in the process, receive easily external force pull or around folding; Because first conductive layer lacks protection; Cause the golden finger place of this flexible print circuit board to occur losing or even rupturing (as shown in Figure 4) easily, not only influence the useful life of flexible print circuit board, more possibly injure the inner circuit of this flexible print circuit board; Make the function of product to realize, thereby influence the performance of liquid crystal indicator.
The utility model content
The purpose of the utility model provides a kind of flexible print circuit board, occurs the problem losing or rupture easily to solve existing flexible print circuit board.
For solving the problems of the technologies described above, the utility model provides a kind of flexible print circuit board, comprises welding ends, and the welding ends of said flexible print circuit board comprises: base material; Be arranged at first conductive layer and second conductive layer of said base material both sides; The some via holes that are used for said first conductive layer of conducting and second conductive layer; Be arranged at first cover layer on said first conductive layer, said first cover layer exposes said via hole; Said flexible print circuit board also comprises second cover layer that is arranged on said second conductive layer, and said second cover layer exposes said via hole.
Optional; In described flexible print circuit board; Said first conductive layer is exposed to the first outer golden finger by many to be formed, and said second conductive layer is made up of many second golden fingers, and said many first golden fingers are corresponding one by one with said many second golden fingers; Through said via hole conducting, the long H3 of length that the length that said first golden finger exposes exposes than said second golden finger.
Optional, in described flexible print circuit board, H3 is 0.3mm～0.8mm.
Optional; In described flexible print circuit board; Said first conductive layer and second conductive layer cover on the said base material through adhesive layer respectively, and said first cover layer and second cover layer cover on said first conductive layer and second conductive layer through adhesive layer respectively.
Optional, in described flexible print circuit board, said second cover layer also covers on the subregion of said base material through adhesive layer.
Optional, in described flexible print circuit board, said first cover layer is 0.5mm～0.8mm near an end of via hole and second cover layer away from the distance of an end of via hole.
Optional, in described flexible print circuit board, said first cover layer, the second tectal material are polyimides, the span of said first cover layer and the second tectal thickness is 10～20 μ m.
Optional, in described flexible print circuit board, the material of said base material is polyimides or polyester film, and the material of said adhesive layer is a transparent adhesive tape, and the material of said first conductive layer, said second conductive layer is a Copper Foil.
Compared with prior art; The flexible print circuit board of the utility model is at surperficial extra second cover layer that is provided with of second conductive layer; Strengthened should the zone intensity; Reinforce the mechanical performance of flexible print circuit board, avoided this flexible print circuit board in transportation or use, to lose or rupture.
Description of drawings
Fig. 1 is the structural representation of the flexible print circuit board of prior art;
Fig. 2 is the tow sides sketch map of the flexible print circuit board of prior art;
Fig. 3 is welded to the sketch map on the substrate for the flexible print circuit board of prior art;
Fig. 4 is the enlarged diagram of circled among Fig. 3;
Fig. 5 is the structural representation of the flexible print circuit board of the utility model embodiment one;
Fig. 6 is the tow sides sketch map of the flexible print circuit board of the utility model embodiment one;
Fig. 7 is welded to the sketch map on the substrate for the flexible print circuit board of the utility model embodiment one;
Fig. 8 is the structural representation of the flexible print circuit board of the utility model embodiment two.
Embodiment
In background technology, mention; Flexible print circuit board is widely used because of it has pliable and tough frivolous characteristic; For example in liquid crystal indicator, said flexible print circuit board is as the transmission of drive current between conducting medium realization chip for driving and the display panels.Yet existing flexible print circuit board is plugging, is moving or pullling in the process; Receive easily external force pull or around folding; Because first conductive layer lacks protection, causes the golden finger place of this flexible print circuit board to occur easily losing or even rupturing, and not only influences the useful life of flexible print circuit board; Also possibly injure the inner circuit of this flexible print circuit board when serious, thereby influence the performance of liquid crystal indicator.
For this reason; The utility model provides a kind of flexible print circuit board, through extra second cover layer that is provided with on second conductive layer, strengthened should the zone intensity; Reinforce the mechanical performance of flexible print circuit board, avoided this flexible print circuit board in transportation or use, to lose or rupture.
Embodiment one
Please refer to Fig. 5, it is the structural representation of the flexible print circuit board welding ends of the utility model embodiment one.At welding ends, said flexible print circuit board 200 comprises: base material 210; Be arranged at first conductive layer 221 and second conductive layer 222 of said base material 210 both sides; The some via holes 220 that are used for said first conductive layer 221 of conducting and second conductive layer 222; Be arranged at first cover layer 230 on said first conductive layer 221 and be arranged at second cover layer 250 on said second conductive layer 222; Wherein, said first cover layer 230 and second cover layer 250 expose said via hole 220.
In the present embodiment; Said base material 210 comprise first surface (front) and with said first surface opposing second surface (reverse side); Said first conductive layer 221 covers on the first surface of said base material 210 through adhesive layer 241; Said second conductive layer 222 covers on the second surface of said base material 210 through adhesive layer 242; Said first cover layer 230 covers on said first conductive layer 221 through adhesive layer 243, and said second cover layer 250 covers on said second conductive layer 222 through adhesive layer 244.
Please refer to Fig. 6; It is the tow sides sketch map of the flexible print circuit board of the utility model embodiment one; Wherein, the left side sketch map is the sketch map of flexible print circuit board 200 first surfaces (front), and the right side sketch map is the sketch map of flexible print circuit board 200 second surfaces (reverse side).As shown in Figure 6; At welding ends; Said flexible print circuit board 200 comprises first conductive layer 221 and second conductive layer 222, and said first conductive layer 221 is exposed to the first outer golden finger 221a by many to be formed, and second conductive layer 222 is made up of many second golden finger 222a.The said first golden finger 221a evenly is arranged in the first surface of base material 210, and the said second golden finger 222a evenly is arranged in the second surface of base material 210; Many first golden finger 221a are generally corresponding one by one with many second golden finger 222a, through via hole 220 conductings.In the time of welding, scolder filled vias 220 makes many first golden finger 221a and the second golden finger 222a link together.The said first golden finger 221a and the second golden finger 222a for example form through etching first conductive layer 221 and second conductive layer 222, know for the technical staff of this area institute because relevant etching forms the technology of golden finger, so this is repeated no more.Need to prove that said golden finger 221a, 222a also can form through other technology such as cutting out, the utility model contrast will not limit.
Continuation is with reference to figure 6; Said first cover layer 230 is H3 near an end A of via hole 220 and second cover layer 250 near the distance of an end B of via hole 220; That is to say the long H3 of length that length that the first golden finger 221a exposes exposes than the second golden finger 222a; H3 is preferably 0.3mm～0.8mm, repeatedly experiment showed, under this value conditions through the application inventor and can obtain preferable relatively effect.In addition; Said first cover layer 230 is H2 near an end A of via hole 220 and second cover layer 250 away from the distance of an end C of via hole 220; Generally speaking; The just said first golden finger 221a is than the short H2 of the said second golden finger 222a, and said H2 for example is 0.5mm～0.8mm, so shifts to install to help avoiding golden finger to be lost.Certainly, above-mentioned numerical value also is not used in qualification the utility model, and said H2 and H3 also can make proper transformation according to the size requirements of reality.
Wherein, the material of said base material 210 for example is polyimides (PI) or polyester film (PET), and its thickness can be 12.5,25,50,125 μ m, also can be the size that other needs certainly.Preferably, the material of said base material 210 is a polyimides.
Wherein, The material of said first cover layer 230 and second cover layer 250 is preferably polyimides; Said first cover layer and the second tectal thickness are 10～20 μ m; This thickness can be under the prerequisite that obtains preferable mechanical performance, and it is excessive to guarantee not cause welding required scolder (being generally scolding tin) amount owing to thickness is excessive.
Wherein, the material of said adhesive layer 241,242,243,244 is a transparent adhesive tape.The material of said first conductive layer 221 and second conductive layer 222 for example is a Copper Foil; In the frequent crooked flexible print circuit board of needs; The material of said first conductive layer 221 and second conductive layer 222 is preferably rolled copper (RACopper); Certainly, the material of said first conductive layer 221 and second conductive layer 222 also can be cathode copper (ED Copper).
Please refer to Fig. 7, it is welded to the sketch map on the substrate for the flexible print circuit board of the utility model embodiment one.As shown in Figure 7; In the process of welding; Scolder is positioned over the first golden finger 221a place, and scolder melts and flows on the pad 21 of substrate 20 through via hole 220 through the flatiron with uniform temperature, thereby the pad 21 of flexible print circuit board 200 with substrate 20 welded together; Make said flexible print circuit board 200 and substrate 20 realize being electrically connected function; Said substrate 20 for example is printed circuit board (PCB) or another flexible print circuit board, and certainly, also other need realize the element that is electrically connected with flexible print circuit board 200 to said substrate 20.Need to prove that because the utility model only relates to an end of flexible print circuit board and other element welding, so does not describe in detail other known part, yet those of ordinary skills are still and know.
In sum; The flexible print circuit board that present embodiment provides is through extra second cover layer that is provided with on second conductive layer; Strengthened should the zone intensity; Reinforce the mechanical performance of flexible print circuit board, thereby avoided this flexible print circuit board in transportation or use, to lose or rupture.In addition, after welding was accomplished, pad 21 was the area of second golden finger 222a exposure place with the area of FPC welding; During tip-off, flatiron is positioned over the part that the first golden finger 221a exposes, and its heat-conducting area is that the first golden finger 221a exposes area; And because the long H3 of length that the length that the first golden finger 221a exposes exposes than the second golden finger 222a so the heat-conducting area of flatiron is bigger with the area of FPC welding than pad 21, is convenient to tip-off like this.
Embodiment two
In embodiment one; Because the mechanical performance that flexible print circuit board has been reinforced in the second tectal existence; Yet, in the process of said flexible print circuit board use or tip-off, because the effect of external force; Golden finger near pad one side is peeled off easily, and the D place base material 210 and second conductive layer 222 promptly as shown in Figure 7 break away from easily.To this problem; Second cover layer of present embodiment not only covers second conductive layer; Also extend on the subregion of said base material through adhesive layer; Further reinforced the mechanical performance of flexible print circuit board thus, avoided this flexible print circuit board in transportation or use, to lose or rupture, and can solve the problem that the golden finger of said flexible print circuit board is prone to peel off in tip-off or use.
As shown in Figure 8, it is the structural representation of the flexible print circuit board welding ends of the utility model embodiment two.At welding ends, second cover layer 350 of said flexible print circuit board 300 not only covers the surface of second conductive layer 322 through adhesive 342, also cover on the subregion of base material 310 through adhesive 342.Can learn; Second conductive layer 322 of said flexible printed circuit board 300 and the subregion of base material 310 are owing to had the support and the protection of second cover layer 350; Plugging, move or pullling in the process, can avoid this flexible print circuit board to occur losing or even rupturing; In addition, in flexible print circuit board tip-off process, because the protection of said second cover layer 350 can be avoided the golden finger of said flexible print circuit board to peel off, thereby prolong the useful life of flexible print circuit board.
Need to prove that each embodiment adopts the mode of going forward one by one to describe in this specification, each embodiment stresses all is the difference with other embodiment, the reference mutually of relevant part.And accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only is used for conveniently, the purpose of each embodiment of aid illustration the utility model lucidly.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (11)
1. a flexible print circuit board comprises welding ends, and the welding ends of said flexible print circuit board comprises:
Base material;
Be arranged at first conductive layer and second conductive layer of said base material both sides;
The some via holes that are used for said first conductive layer of conducting and second conductive layer;
Be arranged at first cover layer on said first conductive layer, said first cover layer exposes said via hole;
It is characterized in that also comprise second cover layer that is arranged on said second conductive layer, said second cover layer exposes said via hole.
2. flexible print circuit board as claimed in claim 1; It is characterized in that; Said first conductive layer is exposed to the first outer golden finger by many to be formed, and said second conductive layer is made up of many second golden fingers, and said many first golden fingers are corresponding one by one with said many second golden fingers; And through said via hole conducting, the long H3 of length that the length that said first golden finger exposes exposes than said second golden finger.
3. flexible print circuit board as claimed in claim 2 is characterized in that, H3 is 0.3mm～0.8mm.
4. flexible print circuit board as claimed in claim 1; It is characterized in that; Said first conductive layer and second conductive layer cover on the said base material through adhesive layer respectively, and said first cover layer and second cover layer cover on said first conductive layer and second conductive layer through adhesive layer respectively.
5. flexible print circuit board as claimed in claim 1 is characterized in that, said second cover layer also covers on the subregion of said base material through adhesive layer.
6. like each described flexible print circuit board among the claim 1-5, it is characterized in that said first cover layer is 0.5mm～0.8mm near an end of via hole and second cover layer away from the distance of an end of via hole.
7. flexible print circuit board as claimed in claim 1 is characterized in that, said first cover layer and the second tectal material are polyimides.
8. like each described flexible print circuit board among the claim 1-5, it is characterized in that the span of said first cover layer, the second tectal thickness is 10～20 μ m.
9. flexible print circuit board as claimed in claim 1 is characterized in that, the material of said base material is polyimides or polyester film.
10. flexible print circuit board as claimed in claim 1 is characterized in that, the material of said adhesive layer is a transparent adhesive tape.
11. flexible print circuit board as claimed in claim 1 is characterized in that, the material of said first conductive layer, said second conductive layer is a Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203223588U CN202190458U (en) | 2011-08-30 | 2011-08-30 | Flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203223588U CN202190458U (en) | 2011-08-30 | 2011-08-30 | Flexible printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202190458U true CN202190458U (en) | 2012-04-11 |
Family
ID=45921889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203223588U Expired - Lifetime CN202190458U (en) | 2011-08-30 | 2011-08-30 | Flexible printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202190458U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107197593A (en) * | 2016-03-15 | 2017-09-22 | 上海和辉光电有限公司 | A kind of flexible PCB and preparation method thereof |
| CN110149759A (en) * | 2019-05-14 | 2019-08-20 | 信利（惠州）智能显示有限公司 | Wiring board and electronic equipment |
| WO2020151391A1 (en) * | 2019-01-23 | 2020-07-30 | 广州视源电子科技股份有限公司 | Flexible circuit board and capacitive screen having same |
| CN112533367A (en) * | 2020-12-03 | 2021-03-19 | 昆山国显光电有限公司 | Flexible circuit board, display screen and electronic equipment |
-
2011
- 2011-08-30 CN CN2011203223588U patent/CN202190458U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107197593A (en) * | 2016-03-15 | 2017-09-22 | 上海和辉光电有限公司 | A kind of flexible PCB and preparation method thereof |
| CN107197593B (en) * | 2016-03-15 | 2019-09-24 | 上海和辉光电有限公司 | A kind of flexible circuit board and preparation method thereof |
| WO2020151391A1 (en) * | 2019-01-23 | 2020-07-30 | 广州视源电子科技股份有限公司 | Flexible circuit board and capacitive screen having same |
| CN110149759A (en) * | 2019-05-14 | 2019-08-20 | 信利（惠州）智能显示有限公司 | Wiring board and electronic equipment |
| CN112533367A (en) * | 2020-12-03 | 2021-03-19 | 昆山国显光电有限公司 | Flexible circuit board, display screen and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120411 |