CN103118488B - A kind of flexible print circuit board - Google Patents
A kind of flexible print circuit board Download PDFInfo
- Publication number
- CN103118488B CN103118488B CN201110364140.3A CN201110364140A CN103118488B CN 103118488 B CN103118488 B CN 103118488B CN 201110364140 A CN201110364140 A CN 201110364140A CN 103118488 B CN103118488 B CN 103118488B
- Authority
- CN
- China
- Prior art keywords
- golden finger
- circuit board
- flexible print
- print circuit
- circuit
- 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.)
- Active
Links
Abstract
The present invention provides a kind of flexible print circuit board, and including flexible print circuit board main part and golden finger extension, described golden finger extension is provided with golden finger circuit, and the length of described golden finger circuit staggers.In the flexible print circuit board that the present invention provides, the size error of described golden finger circuit is offered and puts, the concentration stress of golden finger line end can be disperseed, improve the folding ability of golden finger circuit, prevent golden finger from fractureing from flexible print circuit board and come off.And then, the length solving golden finger circuit described in prior art is identical, the circuit of the most described golden finger pad is positioned at same level height, when by External Force Actings such as welding, bend, frock clamp is lighted, stress point concentrates on the horizontal line of golden finger line end, and golden finger easily fractures the technical problem come off from flexible print circuit board.
Description
Technical field
The invention belongs to communication field, particularly relate to a kind of flexible print circuit board.
Background technology
Flexible print circuit board (Flexible
Printed Circuit, be called for short FPC) have frivolous, soft, can be in characteristics such as three dimensions repeatedly bendings, therefore, in electronic device, a lot of line connection needing bending all can be used FPC, FPC and are increasingly widely applied in electronic correlation industry.
Flexible print circuit board structure includes base material, sequential layer is laminated on substratum transparent on the first of substrate upper surface, upper copper foil layer, substratum transparent and upper PI epiphragma on second, and sequential layer is laminated on first time substratum transparent of base material lower surface, lower copper foil layer, second time substratum transparent and lower PI(Polyimide, polyimides) epiphragma.Wherein, golden finger is the important component part of FPC, by realizing the electrical connection with All other routes plate at FPC golden finger scolding tin.Specifically; golden finger be generally formed in the upper of FPC or/and the second substratum transparent and PI epiphragma are removed (i.e. windowing) by lower surface; or/and lower copper foil layer is to form golden finger circuit in corrosion; then on the circuit stayed, carry out plating nickel gold or chemical nickel and gold processes; electric conductivity and upper stannum with guarantee fund's finger circuit; protecting it from the most oxidized, golden finger upper and lower surface circuit can realize circuit turn-on by the stannum hole of crossing arranged simultaneously.
Refer to shown in Fig. 1-2, flexible print circuit board includes FPC main part 11 and golden finger extension 12, and golden finger extension 12 is provided with golden finger circuit 13, the junction shape of described golden finger extension 12 and FPC main part 11 in an angle 14.The length of existing golden finger circuit 13 is identical, the circuit of the most described golden finger pad is positioned at same level height, when by External Force Actings such as welding, bend, frock clamp is lighted, stress point concentrates on the horizontal line 15 of golden finger line end, and golden finger easily fractures from flexible print circuit board and comes off.
Summary of the invention
It is an object of the invention to provide a kind of novel flexible printed substrate, solve the length of golden finger circuit described in prior art identical, the circuit of the most described golden finger pad is positioned at same level height, when by External Force Actings such as welding, bend, frock clamp is lighted, stress point concentrates on the horizontal line of golden finger line end, and golden finger easily fractures the technical problem come off from flexible print circuit board.
It is an object of the invention to be achieved through the following technical solutions:
A kind of flexible print circuit board, including flexible print circuit board main part and golden finger extension, described golden finger extension is provided with golden finger circuit, and the length of described golden finger circuit staggers.
In the flexible print circuit board that the present invention provides, the size error of described golden finger circuit is offered and puts, the concentration stress of golden finger line end can be disperseed, improve the folding ability of golden finger circuit, prevent golden finger from fractureing from flexible print circuit board and come off.And then, the length solving golden finger circuit described in prior art is identical, the circuit of the most described golden finger pad is positioned at same level height, when by External Force Actings such as welding, bend, frock clamp is lighted, stress point concentrates on the horizontal line of golden finger line end, and golden finger easily fractures the technical problem come off from flexible print circuit board.
Accompanying drawing explanation
Fig. 1 is the flexible print circuit board structural representation that prior art provides.
Fig. 2 is the structure for amplifying schematic diagram in Fig. 1 at A.
Fig. 3 is the flexible print circuit board structural representation that the present invention provides.
Fig. 4 is the structure for amplifying schematic diagram in Fig. 3 at B.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to shown in Fig. 3, a kind of flexible print circuit board, including flexible print circuit board main part 21 and golden finger extension 22, described golden finger extension is provided with golden finger circuit 23, and the length of described golden finger circuit staggers.
In the flexible print circuit board that the present invention provides, the size error of described golden finger circuit is offered and puts, the concentration stress of golden finger line end can be disperseed, improve the folding ability of golden finger circuit, prevent golden finger from fractureing from flexible print circuit board and come off.And then, the length solving golden finger circuit described in prior art is identical, the circuit of the most described golden finger pad is positioned at same level height, when by External Force Actings such as welding, bend, frock clamp is lighted, stress point concentrates on the horizontal line of golden finger line end, and golden finger easily fractures the technical problem come off from flexible print circuit board.
Specifically refer to shown in Fig. 4, wherein, the length of described golden finger circuit 231,232,233,234,235,236 and 237 is respectively 2.73 millimeters, 2.31 millimeters, 2.64 millimeters, 2.51 millimeters, 2.85 millimeters, 2.65 millimeters and 2.53 millimeters, and this part golden finger line length staggers 0.42 millimeter, 0.33 millimeter, 0.13 millimeter, 0.34 millimeter, 0.2 millimeter and 0.12 millimeter respectively.The size error of golden finger circuit is offered and is put by described detailed description of the invention, can disperse the concentration stress of golden finger line end, improves the folding ability of golden finger circuit, prevents golden finger from fractureing from flexible print circuit board and comes off.
Preferably, the length difference that described golden finger circuit staggers is 0.1-0.5 millimeter, if the length staggered is less than 0.1 millimeter, it is formed without obvious length difference, and stress still concentrates on line end, is easily caused golden finger and fractures；Because can reach to improve the purpose that golden finger fractures, so the length staggered is less than 0.5 millimeter.The manufacture method of the golden finger circuit that described length staggers is, the copper foil layer up and down of flexible print circuit board is exposed according to the golden finger circuit drawing of design, develops, is etched, demoulding, remains with the Copper Foil of circuit pack；PI epiphragma is windowed below golden finger circuit.Now, pushed down by PI epiphragma higher than the golden finger circuit pack of height of windowing, increase the degree of being completely embedded of golden finger circuit and top；The golden finger circuit that height is uneven simultaneously can disperse Impact direction herein, protection golden finger circuit and the connectedness of FPC main part and folding strength.
Can draw according to the aforementioned golden finger line construction staggered, golden finger part is to have PI epiphragma and do not have the intersection of PI epiphragma, structure is more complicated, the physical properties such as material hardness, thickness, toughness produce notable difference at golden finger edge, misoperation during as used, golden finger has the hidden danger being broken off.Specifically, PI epiphragma needs to window at golden finger circuit scolding tin position, refer to shown in Fig. 2, and 16 is part of windowing, and 17 is the part remaining with PI epiphragma, and the limit of the limit of golden finger line end i.e. PI epiphragma fenestration is a horizontal line 15.And in this detailed description of the invention, the limit of the PI epiphragma fenestration of described flexible print circuit board is set to waveform, refer to shown in Fig. 4,25 is part of windowing, and 26 is the part remaining with PI epiphragma, 27 be PI epiphragma fenestration be corrugated limit.This waveform PI epiphragma fenestration is when specifically making, the mould of flexible print circuit board PI epiphragma can be opened by this wavy shaped configuration, and PI epiphragma mould is die-cut into required form, again by location hole by die-cut good justifying PI epiphragma delicate application on the copper foil layer (i.e. circuit) etched, then carry out pressing formation.Use this corrugated fenestration to design, the Impact direction of golden finger can be made to disperse towards all directions along waveform, reduce the concentration stress of golden finger, increase the intensity of FPC golden finger, prevent golden finger to be broken off.
As specific embodiment, described corrugated concrete structure can be circular arc, ellipse arc or other the shaped form etc. being linked in sequence；Preferably, described waveform is the circular arc being linked in sequence, and thus, the fenestration of this PI epiphragma is designed to the circular arc of heaving of the sea shape.Specifically, the crest of described wave circular arc and trough vertical dimension are 0.3-0.5 millimeter, adjacent peaks is 0.4-0.6 millimeter with the horizontal range of trough, it is arranged to described wave arc-shaped structure, preferably golden finger Impact direction can be disperseed towards all directions along circular arc, strengthen golden finger intensity.
As specific embodiment, described waveform PI epiphragma fenestration can the golden finger circuit that staggers of corresponding concordant golden finger circuit or height；Preferably, the golden finger circuit effect that institute's waveform PI epiphragma fenestration combination height staggers is more preferable.Now, need the minimum point of guarantee fund's finger circuit must be pushed down by PI epiphragma, and its length being held down is preferred more than 0.2 millimeter.
Refer to shown in Fig. 4, as optimal detailed description of the invention, further, the trough of described wave circular arc is overlapping with golden finger circuit 231-237, the area that now golden finger circuit 231-237 is pushed down by PI epiphragma is maximum, thus effectively enhances the intensity of FPC golden finger.Most preferred embodiment scheme described in employing, can effectively protect FPC not to be torn when by External Force Acting, prevent golden finger from fractureing from flexible print circuit board and come off, and has added three insurances, the golden finger circuit energy normally of protection FPC to FPC.
Refer to shown in Fig. 1, the junction shape of described golden finger extension 12 and FPC main part 11 in an angle 14, this angle 14 easily produces bending when by External Force Actings such as welding, frock clamps, bending place is excessively concentrated because of stress, it is easily deformed and ruptures, causing FPC golden finger circuit to disconnect, cause the electronic device with described FPC can not turn on All other routes plate, the electric property of appropriate section lost efficacy.In order to solve foregoing problems, refer to shown in Fig. 3, the application further provides a kind of flexible print circuit board, including flexible print circuit board main part 21 and golden finger extension 22, described golden finger extension is provided with golden finger circuit 23, the junction shape of flexible print circuit board main part 21 and golden finger extension 22 in an angle, in the upper of described angle flexible print circuit board structure or/and lower copper foil layer has independent anti-tear line 24.
In the flexible print circuit board that this detailed description of the invention provides; in the upper of described angle flexible print circuit board structure or/and lower copper foil layer has independent anti-tear line; when angle is by External Force Acting; external force will first arrive anti-tear line; the direction of power is effectively disperseed by line anti-tear at this, stops, thus effectively protection flexible print circuit board main body circuit is without damage.Therefore; increase this anti-tear line structure, play a very good protection during to FPC by external force, effectively solve FPC golden finger circuit and disconnect; cause the electronic device with described FPC can not turn on All other routes plate, the technical problem that appropriate section electric property lost efficacy.
As specific embodiment, described anti-tear line is independent, the most not with the main body connection in flexible print circuit board；The making of this anti-tear line can use etch process to complete, specifically by the upper copper foil layer of flexible print circuit board angle or lower copper foil layer or copper foil layer development after etching is out up and down, even if it disconnects with other copper foil layer in FPC, the making of this anti-tear line makes Tong Bu with the main body circuit in flexible print circuit board, it is not necessary to increase extra technique and cost；Simultaneously; this anti-tear line uses the upper of existing flexible print circuit board or/and lower copper foil layer makes; and upper or/and the material of lower copper foil layer is rolled copper foil, there is good ductility and toughness, play a very good protection during to flexible print circuit board by External Force Acting.Thus, anti-tear line is all distributed at the upper surface of flexible print circuit board or lower surface or upper and lower surface；Preferably, anti-tear line is distributed in the lower surface of flexible print circuit board.It should be apparent to a person skilled in the art that the production method of described anti-tear line is not limited to etching, on the basis of foregoing description, it is also possible to use other manufacture method such as laser dry etching etc., as long as independent anti-tear line can be formed.
Further; in order to prevent described anti-tear line from turning on other electronic device; the electric property that interference flexible print circuit board is overall; it is sequentially with transparent adhesive tape and protecting film on described anti-tear line; i.e. similar with the structure of flexible print circuit board main part; described transparent adhesive tape and protecting film can use the substratum transparent identical with flexible print circuit board to make with PI epiphragma material, do not repeat them here.
As specific embodiment, described anti-tear line includes the anti-tear line of first parallel with flexible print circuit board main part 21 241 and the parallel with golden finger extension 22 second anti-tear line 242, described first anti-tear line 241 and the junction rounding of the second anti-tear line 242.Certainly, those skilled in the art is understood that, the structure not Limited-stage of described anti-tear line is in this, on the basis of aforementioned anti-tear line 24, other structure can also be used, the junction of the most described first anti-tear line 241 and the second anti-tear line 242 does not use rounding, and uses corner cut；Or described anti-tear line 24 is other structures such as one section of circuit substantially parallel with flexible print circuit board main part 21 and golden finger extension 22, as long as disclosure satisfy that and the stress of angle effectively being disperseed.
Preferably, contact with other conductors such as wiring board to eliminate anti-tear line, the hidden danger of unexpected conducting, and strengthen anti-tear effect, described first anti-tear line 241 and the second anti-tear line 242 distance line plate outline edge 0.1-0.3 millimeter.If apart from described wiring board outline edge less than 0.1 millimeter, anti-tear line can be caused to arrive FPC edge, contact conducting with other conductors of surrounding, the normal work of interference electric property；If apart from described wiring board outline edge more than 0.3 millimeter, its distance FPC edge is too remote, and main body circuit still has the hidden danger that stress is torn, and causes anti-tear performance to weaken.
Preferably, described first anti-tear line 241 and a length of 1-2 millimeter of the second anti-tear line 242, width is 0.1-0.3 millimeter, thus can preferably protect bending place not to be torn；It should be apparent to a person skilled in the art that the length of described first anti-tear line 241 and the second anti-tear line 242 refers to the length before rounding.
Preferably, the rounding radii of the junction of described first anti-tear line 241 and the second anti-tear line 242 is 0.4-0.6 millimeter, thus can preferably disperse stress；If using corner cut, the corner cut distance of described first anti-tear line 241 and the second anti-tear line 242 is 0.3-0.5 millimeter.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (5)
1. a flexible print circuit board, including flexible print circuit board main part and golden finger extension, described golden finger
Extension is provided with a plurality of golden finger circuit, and described flexible print circuit board is provided with PI epiphragma, and described PI epiphragma is to golden finger
Windowing below circuit, described PI epiphragma covers the end that golden finger circuit is different in size, the golden finger line not covered by PI epiphragma
Front end, road flushes, it is characterised in that the length of any two the golden finger circuits in a plurality of golden finger circuit all staggers, and any two
The length difference that bar adjacent golden finger circuit staggers is 0.1-0.5 millimeter.
Flexible print circuit board the most according to claim 1, it is characterised in that the PI lid of described flexible print circuit board
The limit of film fenestration is waveform.
Flexible print circuit board the most according to claim 2, it is characterised in that described waveform is the circle being linked in sequence
Arc.
Flexible print circuit board the most according to claim 3, it is characterised in that the crest of described wave circular arc and ripple
Paddy vertical dimension is 0.3-0.5 millimeter, and adjacent peaks is 0.4-0.6 millimeter with the horizontal range of trough.
Flexible print circuit board the most according to claim 4, it is characterised in that the trough of described wave circular arc and gold
Finger circuit is overlapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110364140.3A CN103118488B (en) | 2011-11-17 | 2011-11-17 | A kind of flexible print circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110364140.3A CN103118488B (en) | 2011-11-17 | 2011-11-17 | A kind of flexible print circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103118488A CN103118488A (en) | 2013-05-22 |
| CN103118488B true CN103118488B (en) | 2016-11-23 |
Family
ID=48416727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110364140.3A Active CN103118488B (en) | 2011-11-17 | 2011-11-17 | A kind of flexible print circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103118488B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955270A (en) * | 2015-06-22 | 2015-09-30 | 安徽方兴科技股份有限公司 | Flexible printed circuit (FPC) board |
| CN107241854A (en) * | 2017-07-31 | 2017-10-10 | 武汉光迅科技股份有限公司 | A kind of flexible printed circuit board resistant to bending and preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346035A (en) * | 2007-07-13 | 2009-01-14 | 富葵精密组件(深圳)有限公司 | Flexible circuit board |
| CN201821575U (en) * | 2010-08-26 | 2011-05-04 | 厦门弘信电子科技有限公司 | Connecting finger structure of flexible circuit board |
| CN202385389U (en) * | 2011-11-17 | 2012-08-15 | 深圳市比亚迪电子部品件有限公司 | Flexible printed circuit board |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03230595A (en) * | 1990-02-05 | 1991-10-14 | Nitto Denko Corp | Flexible printed circuit board |
| CN201234406Y (en) * | 2008-06-27 | 2009-05-06 | 比亚迪股份有限公司 | Flexible printed circuit board |
| CN101643927B (en) * | 2008-08-05 | 2011-04-20 | 北大方正集团有限公司 | Method for manufacturing printed circuit board gold finger |
-
2011
- 2011-11-17 CN CN201110364140.3A patent/CN103118488B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346035A (en) * | 2007-07-13 | 2009-01-14 | 富葵精密组件(深圳)有限公司 | Flexible circuit board |
| CN201821575U (en) * | 2010-08-26 | 2011-05-04 | 厦门弘信电子科技有限公司 | Connecting finger structure of flexible circuit board |
| CN202385389U (en) * | 2011-11-17 | 2012-08-15 | 深圳市比亚迪电子部品件有限公司 | Flexible printed circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103118488A (en) | 2013-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103118480B (en) | A kind of flexible print circuit board | |
| JP5914926B2 (en) | Transparent conductive film | |
| JP5914924B2 (en) | Transparent conductive film | |
| CN205229608U (en) | Liquid crystal display module's main flexible line way board and liquid crystal display module | |
| CN104733643B (en) | Binding structure of OLED display device | |
| CN210112367U (en) | Chip on film substrate, circuit board and display device | |
| CN103118488B (en) | A kind of flexible print circuit board | |
| CN106920800A (en) | Flexible display device and forming method thereof | |
| CN107990175A (en) | A kind of flexible LED rope light | |
| CN105516412B (en) | Flexible PCB and mobile terminal with double golden finger | |
| CN202385384U (en) | Flexible printed circuit board | |
| TW201822596A (en) | Flexible circuit board module | |
| CN202385389U (en) | Flexible printed circuit board | |
| JP5348255B2 (en) | Touch panel sensor and touch panel sensor with flexible printed wiring board | |
| CN109814313B (en) | Display module assembly and mobile terminal | |
| JP2010129685A (en) | Flexible printed substrate | |
| CN204859740U (en) | Flexible circuit board | |
| CN204887669U (en) | Flexible circuit board | |
| CN211982228U (en) | Patch cord flexible circuit board that structural strength is high | |
| CN101989018A (en) | Thin-film transistor substrate | |
| US9693452B2 (en) | Apparatus comprising a conductive path and a method of forming an apparatus with a conductive path | |
| CN216960318U (en) | NFC structure with reinforced anti-cracking bonding pad | |
| CN207884964U (en) | The FPC structures that can prevent flex area from tearing | |
| CN211982211U (en) | Prevent flexible printed circuit board of rupture | |
| CN201550353U (en) | Flexible circuit board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518119, A1 building, A11 building, BYD three stage, BYD Industrial Park, Kwai Chung Road, Longgang District, Shenzhen District, Guangdong, Yanan, China Patentee after: Shenzhen helitai photoelectric Co., Ltd Address before: 518119, A1 building, A11 building, BYD three stage, BYD Industrial Park, Kwai Chung Road, Longgang District, Shenzhen District, Guangdong, Yanan, China Patentee before: SHENZHEN BYD ELECTRONIC COMPONENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |