CN202514165U - Flexible printed circuit board - Google Patents
Flexible printed circuit board Download PDFInfo
- Publication number
- CN202514165U CN202514165U CN2011205691332U CN201120569133U CN202514165U CN 202514165 U CN202514165 U CN 202514165U CN 2011205691332 U CN2011205691332 U CN 2011205691332U CN 201120569133 U CN201120569133 U CN 201120569133U CN 202514165 U CN202514165 U CN 202514165U
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- CN
- China
- Prior art keywords
- circuit board
- conductive layer
- flexible print
- print circuit
- protective layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000010410 layer Substances 0.000 claims abstract description 84
- 239000011241 protective layer Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 44
- 238000003466 welding Methods 0.000 claims abstract description 19
- 239000012790 adhesive layer Substances 0.000 claims description 17
- 239000004642 Polyimide Substances 0.000 claims description 7
- 229920001721 polyimide Polymers 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229920006267 polyester film Polymers 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 101001045744 Sus scrofa Hepatocyte nuclear factor 1-beta Proteins 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
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- Structure Of Printed Boards (AREA)
Abstract
The utility model discloses a flexible printed circuit board, flexible printed circuit board's welding end includes: a substrate; the first conducting layer and the second conducting layer are arranged on two sides of the base material; the through holes are used for conducting the first conducting layer and the second conducting layer; the first protective layer is arranged on two sides of the first conducting layer and/or the second protective layer is arranged on two sides of the second conducting layer. The utility model discloses a flexible printed circuit board has additionally set up first protective layer and/or second protective layer at the welding end, has strengthened this regional intensity, avoids this flexible printed circuit board to reduce or split in transportation or use.
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 (Bonding by 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.
Please refer to Fig. 1 to Fig. 3; Wherein Fig. 1 is the perspective view of the flexible print circuit board of prior art; Fig. 2 is a flexible print circuit board shown in Figure 1 generalized section along A-A ', and Fig. 3 is a flexible print circuit board shown in Figure 1 generalized section along B-B '.
To shown in Figure 3, said flexible print circuit board 100 comprises: base material 110 like Fig. 1; Be arranged at first conductive layer 121 and second conductive layer 122 of base material 110 both sides respectively; And the some via holes 120 that are used for conducting first conductive layer 121 and second conductive layer 122.General; 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.
In addition; Said flexible print circuit board 100 also comprises protective layer 130, and said protective layer 130 covers on the base material 100 and first conductive layer 121 through adhesive layer 143, and; Said protective layer 130 does not all cover this base material 100 and first conductive layer 121; But welding ends is come out, first conductive layer 121 that comes out is made up of many golden fingers, and second conductive layer 122 of same reverse side also is to be made up of many golden fingers; Many positive golden fingers are generally corresponding one by one with many golden fingers of reverse side, through via hole 120 conductings.When welding time, scolder filled vias 120 makes many golden fingers of positive many golden fingers and reverse side link together.
Yet; In the transportation or use of flexible print circuit board, flexible print circuit board in plug, move or pull in the process, receive easily external force pull or around folding; Because welding ends lacks protection; Cause the golden finger and the vicinity thereof of this flexible print circuit board to occur losing or even rupturing (as indicated with a dotted line in Fig. 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 printed 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 protective layer of the said first conductive layer both sides and/or be arranged at second protective layer of the said second conductive layer both sides.
Optional, in described flexible print circuit board, said first protective layer extends on said first conductive layer, and said second protective layer extends on said second conductive layer.
Optional, in described flexible print circuit board, the material of said first protective layer, second protective layer is a polyimides.
Optional, in described flexible print circuit board, the thickness of said first protective layer, second protective layer is 10～25 μ m.
Optional; In described flexible print circuit board, said first conductive layer is made up of many first golden fingers, and said second conductive layer is made up of many second golden fingers; Said many first golden fingers are corresponding one by one with said many second golden fingers, and through said via hole conducting.
Optional, in described flexible print circuit board, the length of said first golden finger is less than the length of said second golden finger.
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 protective layer and second protective layer cover on the said base material through adhesive layer respectively.
Optional, in described flexible print circuit board, the material of said adhesive layer is a transparent adhesive tape.
Optional, in described flexible print circuit board, the material of said base material is polyimides or polyester film.
Optional, in described flexible print circuit board, 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 extra first protective layer and/or second protective layer of being provided with of welding ends; 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 perspective view of the flexible print circuit board of prior art;
Fig. 2 is a flexible print circuit board shown in Figure 1 generalized section along A-A ';
Fig. 3 is a flexible print circuit board shown in Figure 1 generalized section along B-B ';
Fig. 4 is the sketch map in flexible print circuit board when fracture of prior art;
Fig. 5 is the perspective view of the flexible print circuit board of the utility model embodiment one;
Fig. 6 is a flexible print circuit board shown in Figure 5 generalized section along C-C ';
Fig. 7 is a flexible print circuit board shown in Figure 5 generalized section along D-D ';
Fig. 8 is the perspective view of the flexible print circuit board of the utility model embodiment two;
Fig. 9 is the perspective view of the flexible print circuit board of the utility model embodiment three.
Embodiment
Mention that in background technology existing flexible print circuit board is plugging, moving or pullling in the process; Receive easily external force pull or around folding; Because the base material of first conductive layer and the second conductive layer both sides 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 at the extra protective layer that is provided with of first conductive layer and/or the second conductive layer both sides; Strengthened should the zone intensity, the mechanical performance of having reinforced flexible print circuit board avoids this flexible print circuit board in transportation or use, to lose or rupture.
Embodiment one
Please refer to Fig. 5 to Fig. 7; Wherein, Fig. 5 is the perspective view of the flexible print circuit board of the utility model embodiment one, and Fig. 6 is a flexible print circuit board shown in Figure 5 generalized section along C-C ', and Fig. 7 is a flexible print circuit board shown in Figure 5 generalized section along D-D '.
At welding ends, said flexible print circuit board 200 comprises:
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 protective layer 231 of said first conductive layer 221 both sides; With
Be arranged at second protective layer 232 of said second conductive layer 222 both sides.
Wherein, 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 protective layer 231 covers the both sides of said first conductive layer 221 through adhesive layer 243, and said second protective layer 232 covers the both sides of said second conductive layer 222 through adhesive layer 244.
To Fig. 7, at welding ends, said first conductive layer 221 is exposed to the first outer golden finger by many to be formed with reference to figure 5 in continuation, and second conductive layer 222 is made up of many second golden fingers equally.Said first golden finger evenly is arranged in the first surface of base material 210, and said second golden finger evenly is arranged in the second surface of base material 210; Many first golden fingers are generally corresponding one by one with many second golden fingers, through via hole 220 conductings.In the time of welding, scolder filled vias 220 makes many first golden fingers and second golden finger link together.Said first golden finger and second golden finger 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.It is understandable that said golden finger also can wait other technology to form through cutting out, the utility model contrast will not limit.Preferably, the length of said first golden finger is less than the length of second golden finger, so shifts to install to help avoiding golden finger to be lost, and obtains preferable relatively effect.
Preferable, said first protective layer 231 is except being positioned at the both sides of first conductive layer 221, and said first protective layer 231 also extends on the subregion of said first conductive layer 221; Same, said second protective layer 232 also extends on the subregion of said second conductive layer 222 except being positioned at the both sides of second conductive layer 222, so can further strengthen the intensity at golden finger place.
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.In the present embodiment, employed base material 210 for self not with the base material of adhesive layer, this kind base material is comparatively generally commonly used, certainly, also can select to use the base material that carries adhesive layer in other cases.
Wherein, The material of said first protective layer 231 and second protective layer 232 is preferably polyimides; The span of the thickness of said first protective layer 231 and second protective layer 232 is preferably 10 μ m～25 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 (RA Copper); Certainly, the material of said first conductive layer 221 and second conductive layer 222 also can be cathode copper (ED Copper).
Need to prove that because the utility model only relates to an end (welding ends) 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 at the extra protective layer that is provided with of first conductive layer and the second conductive layer both sides; 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.
Embodiment two
In embodiment one; Because the mechanical performance that flexible print circuit board has farthest been reinforced in the existence of first protective layer and second protective layer; Also increased manufacturing cost accordingly yet in first conductive layer and the second conductive layer both sides protective layer is set all, for this reason, the flexible print circuit board 300 of present embodiment only is provided with first protective layer 331 in the both sides of first conductive layer 321; Can learn; Said flexible printed circuit board 300, also can be avoided occurring losing or even rupturing plugging, move or pullling in the process because the support and the protection of first protective layer 331 have been arranged to a certain extent; Improve the mechanical performance of flexible print circuit board, compare the mechanical performance that can be applicable to flexible print circuit board with embodiment one and require relatively low occasion.
Preferably, as shown in Figure 8, said first protective layer 331 also may extend on the subregion of first conductive layer 321, as long as guarantee to expose through hole 320, can guarantee the normal use of flexible print circuit board 300.Said first protective layer 331 can cover on the subregion of both sides and first conductive layer 321 of said first conductive layer 321 through adhesive layer 343.
Embodiment three
Please refer to Fig. 9, present embodiment and embodiment one are with embodiment two differences, are only to be provided with second protective layer 432 in the both sides of second conductive layer 422.It is understandable that, the mechanical performance of the raising flexible print circuit board that second protective layer 432 still can be suitable only is set, can reduce manufacturing cost compared to embodiment one.
Equally; Said second protective layer 432 may also extend on the subregion of second conductive layer 422; As long as guarantee to expose through hole 420, said second protective layer 432 can cover on the subregion of both sides and second conductive layer 422 of said second conductive layer 422 through adhesive layer 444.
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 (10)
1. a flexible print circuit board comprises welding ends, it is characterized in that, 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 protective layer of the said first conductive layer both sides and/or be arranged at second protective layer of the said second conductive layer both sides.
2. flexible print circuit board as claimed in claim 1 is characterized in that, said first protective layer extends on said first conductive layer, and said second protective layer extends on said second conductive layer.
3. flexible print circuit board as claimed in claim 1 is characterized in that, the material of said first protective layer, second protective layer is a polyimides.
4. like claim 1 or 2 or 3 described flexible print circuit boards, it is characterized in that the thickness of said first protective layer, second protective layer is 10～25 μ m.
5. flexible print circuit board as claimed in claim 1; It is characterized in that; Said first conductive layer is made up of many first golden fingers; 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.
6. flexible print circuit board as claimed in claim 5 is characterized in that the length of said first golden finger is less than the length of said second golden finger.
7. 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 protective layer and second protective layer cover on the said base material through adhesive layer respectively.
8. flexible print circuit board as claimed in claim 7 is characterized in that, the material of said adhesive layer is a transparent adhesive tape.
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 first conductive layer, said second conductive layer is a Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205691332U CN202514165U (en) | 2011-12-29 | 2011-12-29 | Flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205691332U CN202514165U (en) | 2011-12-29 | 2011-12-29 | Flexible printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202514165U true CN202514165U (en) | 2012-10-31 |
Family
ID=47066614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205691332U Expired - Lifetime CN202514165U (en) | 2011-12-29 | 2011-12-29 | Flexible printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202514165U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188869A (en) * | 2011-12-29 | 2013-07-03 | 上海天马微电子有限公司 | Flexible printed circuit board |
| TWI556692B (en) * | 2014-08-18 | 2016-11-01 | 台達電子工業股份有限公司 | Fpc-based gold finger device |
-
2011
- 2011-12-29 CN CN2011205691332U patent/CN202514165U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188869A (en) * | 2011-12-29 | 2013-07-03 | 上海天马微电子有限公司 | Flexible printed circuit board |
| CN103188869B (en) * | 2011-12-29 | 2016-08-03 | 上海天马微电子有限公司 | Flexible printed circuit board |
| TWI556692B (en) * | 2014-08-18 | 2016-11-01 | 台達電子工業股份有限公司 | Fpc-based gold finger device |
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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: 20121031 |