CN101877933A - Flexible circuit board - Google Patents
Flexible circuit board Download PDFInfo
- Publication number
- CN101877933A CN101877933A CN2009102461849A CN200910246184A CN101877933A CN 101877933 A CN101877933 A CN 101877933A CN 2009102461849 A CN2009102461849 A CN 2009102461849A CN 200910246184 A CN200910246184 A CN 200910246184A CN 101877933 A CN101877933 A CN 101877933A
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- flexible pcb
- area
- stress concentration
- connecting portion
- main part
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Abstract
The invention relates to a flexible circuit board which comprises a main body part and a joining part, wherein the main body part is configured with an electronic component; the joining part is connected with a connector; two ends of the connector are respectively connected with the main body part and the joining part; and the joining part comprises a buffer area and a stress concentration area, wherein the buffer area is positioned between the stress concentration area and the joining part, and the stress concentration area is positioned between the buffer area and the main body part.
Description
[technical field]
The present invention is a kind of flexible PCB, particularly a kind of flexible PCB with buffering area.
[prior art]
Because global Information And Communication product is flourish, also drives printed circuit board (PCB) (Printing Circuit Board, market PCB), and flexible printed circuit board (Flexible Print Circuit; FPC) now be the application mainstream of many electronic products.
Flexible PCB is widely used on the small-sized portable system that needs compact substrate, as clamshell phone, mobile computer, wrist-watch and hearing aids, and application such as electron medical treatment product.In addition, recent flexible electronic more expanded application (Radio Frequency Identification is RFID) on label and the photoelectric subassembly to radio frequency identification.
Yet, when using flexible PCB, the restriction in some designs is arranged, as: the size of flexible PCB will go up some with the area of copper backing greatly than rigid printed circuit board (PCB); Secondly, must make special weld tabs storehouse, otherwise copper may break away from dielectric layer; Moreover, in the edge of flexible PCB, if the insufficient space of being reserved then will cause peeling off thereby impacting between layer and the layer.In addition, when flexible PCB was subjected to bending, it was damaged because of stress deformation can cause circuit, with the LCD MODULE display abnormality that makes its application.Therefore, developing the technology that addresses the above problem is the direction that industrial circle is desired most ardently development.
[summary of the invention]
In view of this, the present invention proposes a kind of flexible PCB, comprises: main part, dispose electronic building brick; The junction surface is connected in connector; Connecting portion, its two end connects aforementioned body portion and junction surface respectively, and above-mentioned connecting portion comprises buffering area and area of stress concentration.Wherein, above-mentioned buffering area is between area of stress concentration and junction surface, and area of stress concentration is then between buffering area and main part.
Flexible PCB of the present invention, its buffering area are the individual layer plate body.Because when flexible PCB is connected to connector, phenomenon easily arches upward at the place of joining of flexible PCB and connector, if the buffering area of a lamina body structure is set in the place of joining, make the place of joining become soft zone, produce the problem that arches upward in the time of then avoiding flexible PCB to be connected to connector.
In addition, flexible PCB provided by the present invention, the area of stress concentration that it has a multilayer plate body utilizes the intensity of multi-layer sheet body structure, and then strengthens the intensity of bearing strain.When flexible PCB is connected to connector, the connecting portion of above-mentioned flexible PCB suffers external force and produces stress, make the turnover of connecting portion, thereby be easy to generate strain and impaired, therefore, one area of stress concentration is set so that increase the intensity of turnover in connecting portion, moreover, because connecting portion has a buffering area in the place of joining of flexible PCB and connector, therefore will make the position of bearing maximum stress betide buffering area, so can reduce the stress that above-mentioned turnover may suffer, and then avoid turnover to damage, and when making the junction surface be connected to circuit control panel, can reach the function that signal transmits, can normal operation in order to circuit board.
Below in execution mode, be described in detail detailed features of the present invention and advantage, its content is enough to make any related art techniques person of being familiar with to understand technology contents of the present invention and implements according to this, and according to the disclosed content of this specification, claim and graphic, any related art techniques person of haveing the knack of can understand purpose and the advantage that the present invention is correlated with easily.
[description of drawings]
Fig. 1 is the schematic diagram of the disclosed flexible PCB of first embodiment of the invention.
Fig. 2 is the connection diagram of disclosed flexible PCB of first embodiment of the invention and connector.
Fig. 3 A to 8 is in the disclosed flexible PCB of second embodiment of the invention, the schematic diagram of the various aspects of connecting portion.
Fig. 9 is that main part comprises the schematic diagram of multilayer plate body in the disclosed flexible PCB of second embodiment of the invention.
Figure 10 is the structural representation of the multilayer plate body of the disclosed area of stress concentration of first embodiment of the invention
Figure 11 is the structural representation of the individual layer plate body of the disclosed buffering area of first embodiment of the invention.
Figure 12 is the cross-sectional view that the disclosed area of stress concentration of first embodiment of the invention connects buffering area.
Figure 13 to 15A and Figure 15 B are the schematic diagram of the disclosed flexible PCB of fourth embodiment of the invention.
[primary clustering symbol description]
1 ... ... the .. flexible PCB
10 ... ... the .. main part
11 ... ... the .. junction surface
12 ... ... the .. connecting portion
12a ... ... first of ..
12b ... ... second of ..
121 ... ... the .. buffering area
123 ... ... the .. area of stress concentration
1231 ... ... the .. turnover
13 ... ... the .. electronic building brick
14 ... ... the .. connector
15 ... ... the .. circuit control panel
16 ... ... .. coats material
[embodiment]
See also Fig. 1,2 and 3A shown in, be disclosed flexible PCB 1 in the first embodiment of the present invention, include main part 10, junction surface 11 and connecting portion 12, wherein, above-mentioned flexible PCB 1 can be applicable to the backlight module etc. of instrument board, car light, LED illumination or the display of automobile.
Connecting portion 12, its two end connect aforementioned body portion 10 and junction surface 11 respectively, and above-mentioned connecting portion 12 comprises a buffering area 121 and an area of stress concentration 123.Wherein, above-mentioned buffering area 121 is between area of stress concentration 123 and junction surface 11, and above-mentioned area of stress concentration 123 is then between buffering area 121 and main part 10.In addition, above-mentioned area of stress concentration 123 more comprises a turnover 1231, and above-mentioned turnover 1231 comprises one of them of a fillet (R angle), obtuse angle or acute angle.
Generally speaking, when material can not produce displacement under external force, its geometry and size will change, and this deformation is called strain.And when material generation deformation, inside will produce equal and opposite in direction but the direction opposite reaction in order to the opposing external force, this kind reaction force is a stress.
From the above, in assembling flexible PCB 1 time to connector 14, above-mentioned connecting portion 12 need be subjected to an external force can be pulled and be connected to connector 14, and when connecting portion 12 is subjected to external force, connecting portion 12 produces the stress in contrast to external force simultaneously in inside, and this stress concentrates on the turnover 1231 of connecting portion 12, just in the area of stress concentration 123.Therefore, one buffering area 121 is set on connecting portion 12,, avoids connecting portion 12 to make turnover 1231 generation strains and impaired because suffering stress in order to the suffered stress of buffering area of stress concentration 123, and then influence the conducting of circuit board, and the electronic building brick 13 of being located at main body 10 can't be acted on.
In the preferable example of first embodiment, above-mentioned buffering area 121 is the individual layer plate body, and area of stress concentration 123 is the multilayer plate body, shown in Figure 10,11 and 12, wherein, x is a basic unit, above-mentioned basic unit is an insulating substrate, preferably can be polyester (Polyester, PET) or polyimide (Polyimide, PI); Y and y ' are the copper conductor layer; Z and z ' are cover layer.Said structure or material only are example, and the present invention is not as limit.
From the above, the buffering area 121 of one multilayer plate body is set in connecting portion 12, utilize the structural strength of the individual layer plate body that buffering area 121 has, allow connecting portion 12 not be subject to stress and produce deformation, and then avoid circuit to be damaged, and when making junction surface 11 be connected to circuit control panel 15, can reach the function that signal transmits, can normal operation in order to circuit board.
Fig. 3 A to 8 is the disclosed flexible PCB 1 of the second embodiment of the present invention, the connecting portion 12 of flexible PCB 1 can be multiple changes shape, and buffering area 121 and the shape of area of stress concentration 123 at connecting portion 12, consider the position of its turnover 1231, and then the position distribution of design buffering area 12 and area of stress concentration 123, wherein, Fig. 3 A and 3B: connecting portion 12 is a L type; Fig. 4: connecting portion 12 is a line style; Fig. 5: connecting portion 12 is a ㄣ type; Fig. 6: connecting portion 12 is a Y type; Fig. 7: connecting portion 12 is one inverted Y-shaped; Fig. 8: connecting portion 12 is a Http font.
Wherein, the buffering area 121 of above-mentioned icon must be between area of stress concentration 123 and junction surface 11, and area of stress concentration 123 must be contained turnover 1231, in order to strengthen turnover 1231 intensity that meet with stresses.About the buffering area 121 of present embodiment and the position and the area amplitude of area of stress concentration 123 only is example, and the present invention is not as limit.
On the other hand, aforementioned body 10 also can comprise the structure of a multilayer plate body, as shown in Figure 9, and in order to increase the overall construction intensity of main body 10 and connecting portion 12, the position of the multi-layer sheet body structure of aforementioned body portion 10 or area amplitude only are example, and the present invention is not as limit.
According to the above, the area of stress concentration 123 that the connecting portion 12 of flexible PCB 1 of the present invention is set, it is the structure of multilayer plate body, can increase the intensity that connecting portion 12 meets with stresses, moreover 121 structures that are designed to the individual layer plate body of buffering area that connecting portion 12 is set avoid junction surface 11 that connector 14 is arched upward, improve the circuit that is caused when flexible PCB 1 combines with the connector 14 of circuit control panel 15 by this and damage problem, and then promote the overall utility of flexible PCB.
The disclosed flexible PCB 1 of the third embodiment of the present invention comprises main part 10, junction surface 11 and connecting portion 12, as shown in Figure 5.
Connecting portion 12, its two end connects aforementioned body portion 10 and junction surface 11 respectively, above-mentioned connecting portion 12 comprises at least two areas of stress concentration 123 and a buffering area 121, wherein above-mentioned at least two areas of stress concentration 123 lay respectively at two sides that connect connecting portion 12, and at least one side of buffering area 121 is adjacent to area of stress concentration 123.In addition, above-mentioned area of stress concentration 123 more comprises a turnover 1231, and above-mentioned turnover 1231 comprises one of them of a fillet (R angle), obtuse angle or acute angle.
In the preferable example of the 3rd embodiment, above-mentioned buffering area 121 comprises an individual layer plate body, and area of stress concentration 123 comprises a multilayer plate body.
The disclosed flexible PCB 1 of the fourth embodiment of the present invention comprises main part 10, junction surface 11, connecting portion 12 and coats material 16, as shown in figure 13.
Connecting portion 12, its two end connects aforementioned body portion 10 and junction surface 11 respectively, above-mentioned connecting portion 12 comprises at least one area of stress concentration 123, and above-mentioned area of stress concentration 123 more comprises a turnover 1231, and above-mentioned turnover 1231 comprises one of them of a fillet (R angle), obtuse angle or acute angle.
Moreover above-mentioned connecting portion 12 comprises relative one first 12a and one second 12b.Wherein, above-mentioned coating material 16 can be located on first above-mentioned 12a with electronic building brick 13 1, yet above-mentioned coating material 16 can extend to second 12b by this first 12a, shown in Figure 15 A and 15B.
Above-mentioned coating material 16 must cover above-mentioned area of stress concentration 123, when flexible PCB 1 is assembled in the process of connector 14, above-mentioned coating material 16 can absorb and cushion the stress that the area of stress concentration 123 of above-mentioned connecting portion 12 is born, avoid connecting portion 12 to make turnover 1231 produce strains because suffering stress by this and impaired, and then influence the conducting of circuit board, and the electronic building brick 13 of being located at main body 10 can't be operated smoothly.Yet coating material 16 positions of present embodiment only are example, and the present invention is not as limit.
In addition; above-mentioned coating material 16 is a stickiness adhesive tape; flexible PCB 1 can be pasted and be fixed to a pedestal (not icon); therefore; the disclosed coating material 16 of present embodiment not only has pastes fixing function; and have the effect of protection buffering, avoid the turnover 1231 of connecting portion 12 to produce damage because of meeting with stresses.Wherein, said base preferably can be the pedestal of backlight module, and said base only is an example, and the present invention is not as limit.
Though technology contents of the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in the category of the present invention, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (24)
1. flexible PCB comprises:
One main part disposes an electronic building brick;
One junction surface is connected in a connector; And
A junction, its two end connects this main part and this junction surface respectively, and this connecting portion comprises: a buffering area; And
One area of stress concentration, between this buffering area and this main part, and this buffering area is between this area of stress concentration and this junction surface.
2. according to the flexible PCB of claim 1, it is characterized in that this area of stress concentration comprises a turnover.
3. according to the flexible PCB of claim 2, it is characterized in that this turnover comprises one of them of a fillet (R angle), obtuse angle or acute angle.
4. according to the flexible PCB of claim 1, it is characterized in that this buffering area comprises an individual layer plate body.
5. according to the flexible PCB of claim 1, it is characterized in that this area of stress concentration comprises a multilayer plate body.
6. according to the flexible PCB of claim 1, it is characterized in that this electronic building brick comprises a light-emitting diode.
7. according to the flexible PCB of claim 1, it is characterized in that this connector is in order to be connected to a circuit control panel.
8. flexible PCB comprises:
One main part is provided with an electronic building brick;
One junction surface is provided with a connector; And
A junction, its two end connects this main part and this junction surface respectively, and this connecting portion comprises at least two areas of stress concentration and a buffering area, and wherein this at least two area of stress concentration lays respectively at two sides of this connecting portion, and at least one side of this buffering area is adjacent to this area of stress concentration.
9. flexible PCB according to Claim 8 is characterized in that, this each area of stress concentration comprises a turnover.
10. according to the flexible PCB of claim 9, it is characterized in that this turnover comprises one of them of a fillet (R angle), obtuse angle or acute angle.
11. flexible PCB according to Claim 8 is characterized in that, this buffering area comprises an individual layer plate body.
12. flexible PCB according to Claim 8 is characterized in that, this area of stress concentration comprises a multilayer plate body.
13. flexible PCB according to Claim 8 is characterized in that, this electronic building brick comprises a light-emitting diode.
14. flexible PCB according to Claim 8 is characterized in that, this connector is in order to be connected to a circuit control panel.
15. a flexible PCB comprises:
One main part disposes an electronic building brick;
One junction surface is connected in a connector;
A junction, its two end connects this main part and this junction surface respectively, and this connecting portion comprises an area of stress concentration; And
One coats material, is positioned at this connecting portion.
16. the flexible PCB according to claim 15 is characterized in that, this coating material extends to this main part by this connecting portion and is positioned at the surface of this main part.
17. the flexible PCB according to claim 16 is characterized in that, this coats material between this electronic building brick.
18. the flexible PCB according to claim 15 is characterized in that, this area of stress concentration comprises a turnover.
19. the flexible PCB according to claim 18 is characterized in that, this turnover comprises one of them of a fillet (R angle), obtuse angle or acute angle.
20. according to the flexible PCB of claim 15, this coating material comprises a stickiness adhesive tape.
21. according to the flexible PCB of claim 15, this connecting portion comprises relative one first and one second, this coating material and this electronic building brick are positioned at this first.
22. according to the flexible PCB of claim 21, this coating material extends to this second by this first face.
23. the flexible PCB according to claim 15 is characterized in that, this electronic building brick comprises a light-emitting diode.
24. the flexible PCB according to claim 15 is characterized in that, this connector is in order to be connected to a circuit control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102461849A CN101877933B (en) | 2009-12-02 | 2009-12-02 | Flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102461849A CN101877933B (en) | 2009-12-02 | 2009-12-02 | Flexible circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877933A true CN101877933A (en) | 2010-11-03 |
| CN101877933B CN101877933B (en) | 2012-06-27 |
Family
ID=43020367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102461849A Expired - Fee Related CN101877933B (en) | 2009-12-02 | 2009-12-02 | Flexible circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101877933B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8562163B2 (en) | 2010-03-29 | 2013-10-22 | Au Optronics Corporation | Power transmission circuit with EMI shielding, lighting module, and panel display module |
| CN105518765A (en) * | 2014-12-31 | 2016-04-20 | 深圳市柔宇科技有限公司 | Flexible display device and electronic equipment |
| CN108449864A (en) * | 2018-05-18 | 2018-08-24 | 湖南粤港模科实业有限公司 | A kind of cross FPC conductions soft board |
| CN109166839A (en) * | 2018-08-30 | 2019-01-08 | 业成科技（成都）有限公司 | The regional structure of joint sheet |
| CN109524609A (en) * | 2017-09-20 | 2019-03-26 | 莫列斯有限公司 | Battery connection module |
| WO2019100295A1 (en) * | 2017-11-23 | 2019-05-31 | 深圳市柔宇科技有限公司 | Fan-out structure of display panel, and preparation method and application thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7075794B2 (en) * | 2003-09-11 | 2006-07-11 | Motorola, Inc. | Electronic control unit |
| CN1752761A (en) * | 2004-09-21 | 2006-03-29 | 比亚迪股份有限公司 | Testing method of liquid crystal module manufacturing line and switching flexible printed circuit board |
| JP4517845B2 (en) * | 2004-12-13 | 2010-08-04 | 日本電気株式会社 | Flexible cable and method for manufacturing electronic device |
| KR100713536B1 (en) * | 2005-06-07 | 2007-04-30 | 삼성전자주식회사 | FlEXIBLE PRINTED CIRCUIT BOARD FOR ELECTRONIC EQUIPMENT |
-
2009
- 2009-12-02 CN CN2009102461849A patent/CN101877933B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8562163B2 (en) | 2010-03-29 | 2013-10-22 | Au Optronics Corporation | Power transmission circuit with EMI shielding, lighting module, and panel display module |
| CN105518765A (en) * | 2014-12-31 | 2016-04-20 | 深圳市柔宇科技有限公司 | Flexible display device and electronic equipment |
| CN105518765B (en) * | 2014-12-31 | 2019-08-02 | 深圳市柔宇科技有限公司 | Flexible display apparatus and electronic equipment |
| CN109524609A (en) * | 2017-09-20 | 2019-03-26 | 莫列斯有限公司 | Battery connection module |
| WO2019100295A1 (en) * | 2017-11-23 | 2019-05-31 | 深圳市柔宇科技有限公司 | Fan-out structure of display panel, and preparation method and application thereof |
| CN108449864A (en) * | 2018-05-18 | 2018-08-24 | 湖南粤港模科实业有限公司 | A kind of cross FPC conductions soft board |
| CN109166839A (en) * | 2018-08-30 | 2019-01-08 | 业成科技（成都）有限公司 | The regional structure of joint sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877933B (en) | 2012-06-27 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20201202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |