CN105578721A - Flexible circuit board and mobile terminal - Google Patents
Flexible circuit board and mobile terminal Download PDFInfo
- Publication number
- CN105578721A CN105578721A CN201511026749.4A CN201511026749A CN105578721A CN 105578721 A CN105578721 A CN 105578721A CN 201511026749 A CN201511026749 A CN 201511026749A CN 105578721 A CN105578721 A CN 105578721A
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- Prior art keywords
- groove
- flexible pcb
- kink
- circuit board
- bending
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
- H05K1/0281—Reinforcement details thereof
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The invention provides a flexible circuit board, which comprises a body and a first bending part, wherein the body comprises a first body and a second body; the first bending part is connected with the first body and the second body; the first bending part is provided with a bending line and a plurality of grooves; and the grooves and the bending line are arranged in a non-parallel manner. By the flexible circuit board provided by the invention, through the method that the grooves are arranged on the bending parts and the directions of the grooves are not parallel to that of the bending line, the target that the stress of the bending parts of the flexible circuit board is not on one horizontal plane is achieved, so that the tensile ability of a wire on the flexible circuit board is strengthened; and the technical effect of avoiding a poor open circuit due to a broken or damaged flexible circuit board is achieved.
Description
Technical field
The present invention relates to field of circuit boards, more particularly, relate to a kind of flexible PCB and adopt the mobile terminal of this flexible PCB.
Background technology
Flexible PCB is called for short soft board or FPC, is that the one made for base material with polyimides or polyester film has height reliability, excellent flexible printed circuit, has the advantages such as distribution density is high, lightweight, thickness is thin.
Prior art is when manufacturing flexible circuit board; usually the flexible PCB sheet material of monoblock can be cut into the flexible PCB of multiple strip; and then the flexible PCB of strip is bent into required shape, to improve utilance and the production efficiency of flexible circuit sheet material.When bending flexible PCB, being easy to cause flexible PCB to fracture and damaging thus cause circuit breaker bad.Mostly be to occur in the edge of flexible PCB because flexible PCB fractures to damage, the flexible PCB of prior art is normally bad to reduce the flexible PCB circuit breaker that damage causes that fractures by increasing the redundancy of flexible PCB upper conductor distribution or increase wire live width.But, this several mode cannot fundamentally solve flexible PCB fracture damage problem.In actual production, because flexible PCB fractures, to damage the circuit breaker that causes bad still very serious.
Summary of the invention
The object of the present invention is to provide one effectively can prevent bending fracture, reduce the flexible PCB of the probability of the bad generation of circuit breaker.
Another object of the present invention is to provide a kind of mobile terminal adopting above-mentioned flexible PCB.
To achieve these goals, embodiment of the present invention provides following technical scheme:
The invention provides a kind of flexible PCB, wherein, comprise body and the first kink, described body comprises the first noumenon and the second body, described first kink connects described the first noumenon and described second body, described first kink is provided with folding line and multiple groove, described groove and the non-parallel setting of described folding line.
Wherein, also comprise the second kink, described body also comprises the 3rd body, and described second kink connects described 3rd body and described second body.
Wherein, also comprise multiple 3rd kink, described body also comprises multiple 4th body, and often adjacent two described 4th bodies are connected by described 3rd kink, and described 4th body being positioned at head end is connected with described 3rd body by described 3rd kink.
Wherein, described multiple groove arranged in parallel or in net distribution arrange.
Wherein, described multiple groove is that net distribution is arranged, and described groove comprises the first groove and the second groove, and described first groove and described second grooves intersect are netted, and the angular range of described first groove and described second groove is 30 °-60 °.
Wherein, filler is filled with in described groove.
Wherein, described filler is silicon.
Wherein, the width of described groove is 45-65 micron.
Wherein, the shape after described flexible PCB bending is L shape, door shape or Z-shaped.
The present invention also provides a kind of mobile terminal, wherein, comprises the flexible PCB described in above-mentioned any one.
Embodiment of the present invention tool has the following advantages or beneficial effect:
Flexible PCB provided by the invention is by arranging groove at kink, and the method that groove direction is not parallel with folding line, realize the object of stress not on a horizontal plane of flexible PCB kink, thus enhance the resistance to tension of flexible PCB upper conductor, reach and avoid damaging the bad technique effect of the circuit breaker that causes because flexible PCB fractures.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is first embodiment of the invention flexible circuit board structure schematic diagram;
Fig. 2 is the A-A schematic diagram of the flexible circuit board structure had described in Fig. 1;
Fig. 3 is the schematic diagram after flexible PCB of the present invention bending;
Fig. 4 is second embodiment of the invention flexible circuit board structure schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Refer to Fig. 1 and Fig. 2, in the embodiment of first of the present invention, described flexible PCB 10 is roughly rectangle.Preferably, described rectangular width is less than 1/3rd of length dimension.Described flexible PCB 10 comprises body and kink 12.Described body comprises the first noumenon 111 and the second body 112, and described the first noumenon 111 and described second body 112 can be analog structure, and length can be different.Described kink 12 connects described the first noumenon 111 and described second body 112, and described kink 12 is provided with folding line 13, and described flexible PCB 10 bends along described folding line 13.Kink 12 is also provided with multiple groove 14 in strip.And described multiple strip groove 14 is not parallel with described folding line 13.Namely described multiple groove 14 is crossing but not parallel with described folding line 13.Arranged in parallel between described multiple groove 14.
It is maximum that folding line 13 place due to kink is subject to stress, and therefore, fractureing of flexible PCB damages in most folding line place occurred in flexible PCB.The flexible PCB 10 that the present embodiment provides is by arranging the method for the uneven groove of multiple and described folding line at kink, be different directions by groove by Stress decomposition, make the stress at flexible PCB folding line place not on a horizontal plane, avoid folding line upper stress concentration phenomenon, thus improve flexible PCB bend resistance ability, and this structure is not affecting the pliability of flexible PCB, thus avoid because flexible PCB fractures that to damage the circuit breaker that causes bad.
Further, the flexible PCB 10 that the present embodiment provides by with the addition of the filler 15 of the material of resistance to bending in groove 14, to increase the bend resistance ability of flexible PCB 10, thus further avoid because flexible PCB 10 fractures that to damage the circuit breaker that causes bad.
Further, filler is megohmite insulant, and as the semiconductor Si race element of better softness, preferred filler is silicon.
The technique that the basis that prior art prepares flexible PCB adds one cutting of the flexible PCB that the present embodiment provides, namely to rub out the groove 14 in list structure at the kink of flexible PCB, and filler is filled in groove 14, carry out Cu plating, punching, exposure etching, the plating of Zn and the coating of SR afterwards again.Be distributed with on the inner surface of electronic devices and components because groove 14 is arranged at, therefore must fill filler by groove, during to prevent from electroplating Cu, Cu enters in groove 14.
The method of filling carries out filling process by liquid silicon, allow liquid silicon slowly flow into groove, and up time is full of groove, then carries out blowing flat process with air-heater, the key of this method controls the amount of silicon and ensures the pressure of air-heater, and the volume of the liquid silicon added by guarantee is equal with the volume of groove.
Further, the width of groove 14 is 45-65 micron.Consider the factor such as the number of groove, the fill process of filler, the recess width preferably within the scope of this, can increase stretching resistance, makes flexible PCB avoid bending to damage.
Apparent, it is all some relatively simple shapes that flexible PCB 10 bends the shape formed, few one of the number of the number ratio body of its folding line 13.In other words, the number of folding line 13 is identical with the number of kink.Concrete, refer to Fig. 3 (saving groove and filler in figure), the shape after described flexible PCB bending can be L shape, door shape or Z-shaped etc.That is, flexible PCB 10 also comprises the second kink (scheming unnumbered), and described body also comprises the 3rd body (scheming unnumbered), and described second kink connects described 3rd body and described second body.Apparent, flexible PCB 10 can also comprise multiple 4th body (scheming unnumbered) and multiple 3rd kink (scheming unnumbered), often adjacent two described 4th bodies are connected by described 3rd kink, and described 4th body being positioned at head end is connected with described 3rd body by described 3rd kink.Apparent, the structural similarity of above-mentioned the first noumenon, the second body, the 3rd body and the 4th body, certain length can regulate according to demand.The structure of above-mentioned first kink, the second kink and the 3rd kink should be identical.
The angle that flexible PCB 10 bends, shape, according to the requirements set of user, need ensure can not arrange components and parts in bending place.Can adopt manual bending during bending flexible circuit board 10, when the flexible PCB 10 for same shape is produced in enormous quantities, also can adopt mechanical deflection, angle and the shape coincidence of bending are high, also can reduce cost of labor simultaneously.
Embodiment two
Refer to Fig. 4, the distinctive points of the present embodiment and embodiment one is, is provided with intersects in cancellated several the first groove 21 and several second grooves 22 at the kink of flexible PCB 20.
It is maximum that folding line place due to kink is subject to stress, and therefore, the damage that fractures of flexible PCB is most occurs in the folding line place with flexible PCB.The flexible PCB 20 that the present embodiment provides is by arranging several the first groove 21 and second grooves 22 in netted setting at kink, by being different directions in the groove of netted setting by Stress decomposition, namely flexible PCB is made at the stress of folding line not on a horizontal plane, avoid folding line place stress concentration phenomenon, make flexible PCB 20 bend resistance more, thus enhance the resistance to tension of flexible PCB 20 upper conductor.And this structure is not having influence on the flexible bend resistance ability enhancing flexible PCB 20 of flexible PCB 20 simultaneously, thus avoid and damage because flexible PCB 20 fractures the circuit breaker that causes.
Further, the network structure that several first grooves 21 and several second grooves 22 are formed should not form vertical stratification, i.e. out of plumb between described first groove 21 and described second groove 22.Because once form vertical stratification or be slightly less than the acuter angles of 90 degree, flexible PCB stressed increasing when bending fold can be caused, be unfavorable for reducing stress.But angle little especially also should not reduce the stress intensity at folding line place, therefore recommend its angle α value between 30 °-60 ° that the first groove 21 and the second groove 22 are formed, preferred α can be 45 ° further.
As further preferred scheme, should ensure that folding line 13 avoids the crosspoint of the first groove 21 and the second groove 22.Namely ensure that folding line 13 does not overlap with cancellated crosspoint.Because the stress Relatively centralized at the first groove 21 and the second groove 22 crosspoint place, for reducing the stress at folding line 13 place, folding line 13 should avoid the place setting that stress is concentrated.
Further, the flexible PCB 20 that the present embodiment provides by with the addition of the filler (unnumbered) of similar bead structures in the first groove 21 and the second groove 22, to increase the bend resistance ability of flexible PCB 20, thus further avoid because flexible PCB 20 fractures that to damage the circuit breaker that causes bad.
The technique that the basis that prior art prepares flexible PCB adds one cutting of the flexible PCB that the present embodiment provides, namely to rub out the first groove 21 and the second groove 22 in list structure at the kink of flexible PCB, and the first groove 21 and the second groove 22 are intersected to form network structure.Then in the first groove 21 and the second groove 22, fill filler, carry out Cu plating, punching, exposure etching, the plating of Zn and the coating of SR afterwards again.Be distributed with on the inner surface of electronic devices and components because the first groove 21 and the second groove 22 are arranged at, therefore must fill filler by groove, during to prevent from electroplating Cu, Cu enters in the first groove 21 and the second groove 22.
The method of filling carries out filling process by liquid silicon to the first groove 21 and the second groove 22, liquid silicon is allowed slowly to flow into the first groove 21 and the second groove 22, and carry out blowing flat process with air-heater, the key of this method controls the amount of silicon and ensures the pressure of air-heater, and the volume of the liquid silicon added by guarantee is equal with the volume of the first groove 21 and the second groove 22.
Further, the width of the first groove 21 and the second groove 22 is 45-65 micron.Consider the factor such as the number of groove, the fill process of filler, the recess width preferably within the scope of this, can increase stretching resistance, makes flexible PCB avoid bending to damage.
The present invention also provides a kind of mobile terminal adopting above-mentioned flexible PCB, and described mobile terminal can be mobile phone, panel computer, television set, display, notebook computer, DPF, navigator etc.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, equivalently to replace and improvement etc., within the protection range that all should be included in this technical scheme.
Claims (10)
1. a flexible PCB, it is characterized in that, comprise body and the first kink, described body comprises the first noumenon and the second body, described first kink connects described the first noumenon and described second body, described first kink is provided with folding line and multiple groove, described groove and the non-parallel setting of described folding line.
2. flexible PCB as claimed in claim 1, it is characterized in that, also comprise the second kink, described body also comprises the 3rd body, and described second kink connects described 3rd body and described second body.
3. flexible PCB as claimed in claim 2, it is characterized in that, also comprise multiple 3rd kink, described body also comprises multiple 4th body, often adjacent two described 4th bodies are connected by described 3rd kink, and described 4th body being positioned at head end is connected with described 3rd body by described 3rd kink.
4. the flexible PCB as described in claim 1-3 any one, is characterized in that, described multiple groove is arranged in parallel or arrange in net distribution.
5. flexible PCB as claimed in claim 4, it is characterized in that, described multiple groove is that net distribution is arranged, described groove comprises the first groove and the second groove, described first groove and described second grooves intersect are netted, and the angular range of described first groove and described second groove is 30 °-60 °.
6. flexible PCB as claimed in claim 4, is characterized in that, be filled with filler in described groove.
7. flexible PCB as claimed in claim 6, it is characterized in that, described filler is silicon.
8. flexible PCB as claimed in claim 1, it is characterized in that, the width of described groove is 45-65 micron.
9. flexible PCB as claimed in claim 1, is characterized in that, the shape after described flexible PCB bending is L shape, door shape or Z-shaped.
10. a mobile terminal, is characterized in that, comprises the flexible PCB described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026749.4A CN105578721A (en) | 2015-12-29 | 2015-12-29 | Flexible circuit board and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026749.4A CN105578721A (en) | 2015-12-29 | 2015-12-29 | Flexible circuit board and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105578721A true CN105578721A (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511026749.4A Pending CN105578721A (en) | 2015-12-29 | 2015-12-29 | Flexible circuit board and mobile terminal |
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| Country | Link |
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| CN (1) | CN105578721A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919061A (en) * | 2016-10-05 | 2018-04-17 | 三星显示有限公司 | Display device |
| CN109983851A (en) * | 2017-10-25 | 2019-07-05 | 深圳市大疆创新科技有限公司 | Flexible circuit board and electronic device |
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| CN101346047A (en) * | 2007-07-13 | 2009-01-14 | 富葵精密组件(深圳)有限公司 | Multi-layer circuit board production method and inner layer substrates for producing the same |
| CN101448358A (en) * | 2007-11-28 | 2009-06-03 | 胜华科技股份有限公司 | Design of bending region structure of flexible printed circuit board |
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| CN203608450U (en) * | 2013-11-25 | 2014-05-21 | 昆山龙腾光电有限公司 | Flexible circuit board |
| CN203840633U (en) * | 2014-04-22 | 2014-09-17 | 华为技术有限公司 | Flexible circuit board and signal transmission device |
| CN204810675U (en) * | 2015-07-13 | 2015-11-25 | 深圳市弘电显示技术有限公司 | Liquid crystal display is with preventing FPC structure of splitting |
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2015
- 2015-12-29 CN CN201511026749.4A patent/CN105578721A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101346047A (en) * | 2007-07-13 | 2009-01-14 | 富葵精密组件(深圳)有限公司 | Multi-layer circuit board production method and inner layer substrates for producing the same |
| CN101448358A (en) * | 2007-11-28 | 2009-06-03 | 胜华科技股份有限公司 | Design of bending region structure of flexible printed circuit board |
| CN201536453U (en) * | 2009-09-24 | 2010-07-28 | 北京京东方光电科技有限公司 | Cof flexible circuit board |
| CN203608450U (en) * | 2013-11-25 | 2014-05-21 | 昆山龙腾光电有限公司 | Flexible circuit board |
| CN203840633U (en) * | 2014-04-22 | 2014-09-17 | 华为技术有限公司 | Flexible circuit board and signal transmission device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919061A (en) * | 2016-10-05 | 2018-04-17 | 三星显示有限公司 | Display device |
| CN107919061B (en) * | 2016-10-05 | 2021-11-09 | 三星显示有限公司 | Display device |
| CN109983851A (en) * | 2017-10-25 | 2019-07-05 | 深圳市大疆创新科技有限公司 | Flexible circuit board and electronic device |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |
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| RJ01 | Rejection of invention patent application after publication |