CN1694600A - Two-sided flexible printed circuit board - Google Patents
Two-sided flexible printed circuit board Download PDFInfo
- Publication number
- CN1694600A CN1694600A CN 200510073862 CN200510073862A CN1694600A CN 1694600 A CN1694600 A CN 1694600A CN 200510073862 CN200510073862 CN 200510073862 CN 200510073862 A CN200510073862 A CN 200510073862A CN 1694600 A CN1694600 A CN 1694600A
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- Prior art keywords
- circuit board
- printed circuit
- bending district
- layer
- bending
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Abstract
This invention relates to a double-face soft PCB including a bottom cover layer, a low conduction wired layer, a soft base plate, an up conduction wired layer and a top cover layer orderly, among which, the soft base plate includes a first non-creasing zone, a second non-creasing zone and a creasing zone set between them, the up conduction wired layer is wired above the top surfaces of the two non-creasing zones and part of the creasing zone to be covered by the top cover layer, the un-wired top surface is bared in the creasing zone. The low conduction wired layer is wired on the lower surface of the two non-creasing zones and the creasing zone, the bottom cover layer is formed below the conduction wired layer.
Description
Technical field
The present invention relates to a kind of flexible printed wiring board, particularly a kind of two-sided flexible printed circuit board.
Background technology
Printed circuit board (PCB) (Printed Circuit Board, PCB) be according to circuit design, the electric wiring of connecting circuit part is depicted as wiring figure, and then, on insulated substrate, makes electric conductor reappear the circuit that is constituted in modes such as machining, surface treatments.The mutual electric current that the major function of printed circuit board (PCB) provides above-mentioned every part connects, and can be divided into single face, two-sided and multi-layer sheet according to its circuit arrangement situation.The printed circuit board (PCB) made from flexible substrate wherein, (Flexible PrintingCircuit FPC), possesses advantages such as light weight, ultra-thin, soft, deflection, freedom shape be big to be called flexible printed wiring board again.
Flexible printed wiring board has been widely used in notebook, LCD, digital camera, mobile phone and the many consumer electronics.Along with the information electronic product is compact day by day, the zone that flexible printed wiring board can connect up dwindles and often need bend.In addition, the part that required by electronic product is wanted is more and more, and circuit and part on the flexible printed wiring board are also more and more intensive, and is also more and more stricter for the requirement in the zone of can connecting up.
Please refer to Figure 1A, be the basic structure of traditional two-sided flexible printed circuit board.Tradition two-sided flexible printed circuit board 10 comprises a substrate 11, and substrate 11 upper and lower surfaces are generally the Copper Foil cabling with adhesion glue 12 fixing metal circuits 13.Fix a cover layer 14 with comprehensive covering metallic circuit 13 on metallic circuit 13 surfaces with adhesion glue 12.Therefore can cause two-sided flexible printed circuit board 10 difficult bendings really up to the mark.Shown in Figure 1B, the pliability when increasing two-sided flexible printed circuit board 10 bending, general two-sided flexible printed circuit board has a bending district 15, and bending district 15 only does the single face wiring.Fig. 1 C is the structure after two-sided flexible printed circuit board 10 bendings.
But because the wiring and the increase of part, and the dwindling of the zone of can connecting up, force bending district 15 also to need double-sided wiring, but can cause bending district 15 really up to the mark in bending district's 15 wirings.For solving above-described problem, this case proposes a kind of double-sided wiring and two-sided flexible printed circuit board that satisfies bending district desired softness of having concurrently.
Summary of the invention
Main purpose of the present invention is to provide a kind of two-sided flexible printed circuit board, and its bending district has the part substrate and is exposed to outer to increase pliability.
Two-sided flexible printed circuit board of the present invention comprises a flexible base plate, once a conducting wiring layer and a upper caldding layer on conducting wiring layer, the lower caldding layer.Flexible base plate comprises one first non-bending district, one second non-bending district and a bending district, and wherein the bending district is between the first non-bending district and the second non-bending district.Last conducting wiring floor is laid in the first non-bending district and the second non-bending district of flexible base plate comprehensively, and on the upper surface in part bending district, and the upper surface in another part bending district is exposed.Upper caldding layer is formed on the conducting wiring layer.Following conducting wiring floor then is laid in the lower surface in the first non-bending district, the second non-bending district and the bending district of flexible base plate comprehensively.Forming lower caldding layer below the conducting wiring layer down.
Connect up with the restriction of solution flexible printed wiring board wiring space and the problem of reduction at the bending district of above-mentioned two-sided flexible printed circuit board part upper surface, and can take into account the pliability in bending district.
Description of drawings
Figure 1A is traditional two-sided flexible printed circuit board;
Figure 1B is the bending district structure of traditional two-sided flexible printed circuit board;
Fig. 1 C is the structure after the two-sided flexible printed circuit board bending;
Fig. 2 A is a two-sided flexible printed circuit board of the present invention;
Fig. 2 B is the structure after the two-sided flexible printed circuit board bending among Fig. 2 A;
Fig. 3 A is two-sided flexible printed circuit board of the present invention (second preferred embodiment);
Fig. 3 B is the structure after the two-sided flexible printed circuit board bending among Fig. 3 A;
Fig. 4 is two-sided flexible printed circuit board of the present invention (the 3rd preferred embodiment); And
Fig. 5 is for using the electronic installation of two-sided flexible printed circuit board of the present invention.
The primary clustering symbol description
10 thin-skinned property printed circuit board (PCB)s 321 are wiring region not
11 flexible base plates, 322 wiring region
12 adhesion glue, 33 second non-bending districts
Conducting wiring layer 40 two-sided flexible printed circuit board on 13
Conducting wiring floor 41 first non-bending district under the 13a
14 upper caldding layers, 42 bending districts
14a lower caldding layer 421 is wiring region not
15 bending districts, 4211 through holes
20 two-sided flexible printed circuit boards, 422 wiring region
43 second non-bending districts, 21 first non-bending districts
22 bending districts, 50 electronic installations
221 wiring region 51 display floaters not
222 wiring region, 52 motherboards
23 second non-bending districts, 521 internal memories
30 two-sided flexible printed circuit boards, 522 microprocessors
31 first non-bending districts, 523 functional chips
32 bending districts
Embodiment
Following conjunction with figs. describes the present invention in detail, and enumerates preferred embodiment and be described as follows:
Please refer to Fig. 2 A, be two-sided flexible printed circuit board 20 of the present invention, comprise a flexible base plate 11, once a conducting wiring layer 13 and a upper caldding layer 14 on conducting wiring layer 13a, the lower caldding layer 14a.Structure of each layer and position relation are as follows, and flexible base plate 11 comprises one first non-bending district 21, one second non-bending district 23 and a bending district 22, and wherein bending district 22 is between the 21 and second non-bending district 23, the first non-bending district.Following conducting wiring floor 13a is laid in the lower surface in 21, the second non-bending district 23, the first non-bending district and the bending district 22 of flexible base plate 11 comprehensively.Lower caldding layer 14a is formed at down under the conducting wiring layer 13a.Last conducting wiring floor 13 mainly is laid in the 21 and second non-bending district 23, the first non-bending district of flexible base plate 11, and on the upper surface in part bending district 22, and the upper surface in part bending district 22 is exposed.Upper caldding layer 14 is formed on the conducting wiring layer 13.
Because the restriction of pliability, each layer thickness scope of two-sided flexible printed circuit board 20 is as follows: flexible base plate 11 thickness are preferably 0.0254-0.0508mm (1-2mil) and (annotate: 1mil=10
-3Inch); Last conducting wiring layer 13 reaches the preferred 0.01524-0.0305g/cm of thickness of conducting wiring layer 13a down
2(0.5-1oz/ft
2), and the thickness of upper caldding layer 14 and lower caldding layer 14a is preferably 0.0127-0.0254mm (0.5-1mil).Adhesion glue thickness is 0.0102-0.0254mm (0.4-1mil).
The each several part material of two-sided flexible printed circuit board 20 is as follows, the material of flexible base plate 11 can be selected polyester (PET), pi (PI) or derivatives thereof for use, therefore wherein the pi flame resistance is preferred, if major part is selected the pi material for use when the welding demand is arranged.Last conducting wiring layer 13 reaches down, and the material of conducting wiring layer 13a is generally metal materials such as Copper Foil.Copper foil material is divided into calendering copper and cathode copper.The mechanical property of calendering copper is preferred, thus flexility when having relatively high expectations major part select calendering copper for use.The material of upper caldding layer 14 and lower caldding layer 14a can be selected polyester, pi and derivative thereof for use.Adhesion glue 12 between above-mentioned each layer can adopt acrylic resin or epoxy resin.In the manufacturing, the copper foil base material that combines by Copper Foil, adhesion glue 12 and flexible substrate 11, can Copper Foil and the no gum base materials that combines of flexible substrate substitute.Form the wiring region pattern with etching technique again at copper clad laminate or the Copper Foil that do not have on the matrix plate.
Please refer to Fig. 2 B, be the structure after two-sided flexible printed circuit board 20 bendings of Fig. 2 A.Two-sided flexible printed circuit board 20 is after bending, its bending district formed circular arc in 22 sides can reach the degree of crook of radius of curvature r less than 2.5mm, and the spacing distance d in the 21 and second non-bending district 23, the first non-bending district, 22 two ends, bending district can further to 2mm.
Please refer to Fig. 3 A, be second preferred embodiment of the present invention.The layers of material of two-sided flexible printed circuit board 30 and order are as described in Fig. 2 A, and its flexible base plate also is divided into 31, second non-bending district 33, the first non-bending district and bending district 32, and wherein wiring region 322 structures in bending district 32 are identical with wiring region 222.Be with Fig. 2 A difference, increase cover layer 14 on the not wiring zone 321 in bending district 32 and destroyed with the exposed part of avoiding flexible printed wiring board and influence structural strength.Please refer to Fig. 3 B, be the structure after two-sided flexible printed circuit board 30 bendings of Fig. 3 A.
Please refer to Fig. 4, be the 3rd preferred embodiment of the present invention.Two-sided flexible printed circuit board 40 also has 41, second non-bending district 43, the first non-bending district and bending district 42, and wiring region 422 structures in bending district 42 are identical with the wiring region 222 of Fig. 2 A.Yet, in order more to increase pliability, increase the exposed part that at least one through hole 4211 runs through flexible base plate 11 in wiring region 421 not.
In order more flexibly to use two-sided flexible printed circuit board of the present invention, the visual actual needs in the first non-bending district and the second non-bending district changes region shape and size among above-mentioned three embodiment, for example adjusts with the difference of circuit layout or substrate shape.Last conducting wiring layer and down the conducting wiring layer form many metal wires for the etching metal material, wherein go up the conducting wiring floor and be positioned at bending and distinguish the part of upper surface and be made into winding displacement.After forming, each wiring layer carries out surface treatments such as anti-oxidant or chemical liquid deposition again.
Effective between moving part, the connection between rigid printed circuit board or the rigid printed circuit board that flexible printed wiring board is mainly used in electronic installation and flexible printed wiring board is connected combination.Please refer to Fig. 5, for having the electronic installation of two-sided flexible printed circuit board of the present invention, this electronic installation is a kind of in the multiple application of two-sided flexible printed circuit board of the present invention, unrestricted its application.Wherein, electronic installation 50 comprises that a display floater 51 and a motherboard 52, two assemblies connect with two-sided flexible printed circuit board 20.Display floater 51 can be liquid crystal panel or the dynamo-electric display floater that swashs is arranged.Motherboard 52 tops have circuit system assemblies such as internal memory 521, microprocessor 522 or other functional chip 523.Outside the flexible base plate surface major part in bending district 22 is exposed to, small part zone adhesion wiring layer and cover layer are only arranged.Therefore, the pliability of two-sided flexible printed circuit board 20 is improved, and its shape is variation also, more can flexibly be connected combination with other assembly of electronic installation 50.
Double-sided printed-circuit board provided by the present invention bends the district in part and makes double-sided wiring, when comparing mutually with conventional art, more possesses the area that increases wiring, the advantages such as pliability that the increase bending is distinguished.Therefore, not only on technological thought, really belong to innovation, and can promote above-mentioned effect than conventional method.
Above-listed detailed description specifies at the preferred embodiment of the present invention, and only the foregoing description is not in order to limiting the scope of the invention, and all equivalences that does not break away from the technology of the present invention spirit are implemented or change, all should be contained in the scope of the present invention.
Claims (11)
1. two-sided flexible printed circuit board comprises:
One has the flexible base plate on upper and lower surface, comprises one first non-bending district, one second non-bending district and a bending district, and this bending district is between this first non-bending district and this second non-bending district;
Conducting wiring layer once is laid in the lower surface in this first non-bending district, this second non-bending district and this bending district of this flexible base plate comprehensively;
One lower caldding layer is formed under this time conducting wiring layer;
Conducting wiring layer on one mainly is laid in this first non-bending district and this second non-bending district of this flexible base plate, and partly is somebody's turn to do on the upper surface in bending district, and the upper surface in this bending district of part is exposed; And
One upper caldding layer is formed on this on conducting wiring layer.
2. printed circuit board (PCB) as claimed in claim 1, wherein the material of this flexible base plate is selected from the group that polyester, pi and derivative thereof are formed.
3. printed circuit board (PCB) as claimed in claim 1, the material that wherein should go up conducting wiring layer and this time conducting wiring layer for be selected from roll copper or cathode copper the two one of.
4. printed circuit board (PCB) as claimed in claim 1, wherein the material of this upper caldding layer and this lower caldding layer is selected from the group that polyester, pi and derivative thereof are formed.
5. printed circuit board (PCB) as claimed in claim 1, wherein this flexible base plate thickness is 0.0254-0.0508mm (1-2mil).
6. printed circuit board (PCB) as claimed in claim 1, the thickness that wherein should go up conducting wiring layer and this time conducting wiring layer is 0.01524-0.0305g/cm
2(0.5-1oz/ft
2).
7. printed circuit board (PCB) as claimed in claim 1, wherein the thickness of this upper caldding layer and this lower caldding layer is 0.0127-0.0254mm (0.5-1mil).
8. printed circuit board (PCB) as claimed in claim 1 comprises that more a through hole runs through the exposed part of this flexible base plate.
9. printed circuit board (PCB) as claimed in claim 1 wherein should be gone up the conducting wiring layer and this time conducting wiring layer comprises many metal line.
10. printed circuit board (PCB) as claimed in claim 1, wherein this upper caldding layer holomorphism is formed on this bending district upper surface of this flexible base plate.
11. printed circuit board (PCB) as claimed in claim 1, the conducting wiring floor of should going up that wherein is positioned at this bending district upper surface of part comprises a winding displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510073862 CN1694600A (en) | 2005-05-25 | 2005-05-25 | Two-sided flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510073862 CN1694600A (en) | 2005-05-25 | 2005-05-25 | Two-sided flexible printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1694600A true CN1694600A (en) | 2005-11-09 |
Family
ID=35353345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510073862 Pending CN1694600A (en) | 2005-05-25 | 2005-05-25 | Two-sided flexible printed circuit board |
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| Country | Link |
|---|---|
| CN (1) | CN1694600A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976555B (en) * | 2005-12-02 | 2010-12-15 | 日东电工株式会社 | Wired circuit board |
| US8030574B2 (en) | 2007-04-25 | 2011-10-04 | Innocom Technology (Shenzhen) Co., Ltd. | Flexible printed circuit |
| CN101801156B (en) * | 2009-02-06 | 2013-02-27 | 周伯如 | Method for manufacturing flexible printed circuit board and structure thereof |
| CN104185367A (en) * | 2013-05-24 | 2014-12-03 | 英业达科技有限公司 | Flexible printed circuit board and circuit board structure applying flexible printed circuit board |
| CN104981102A (en) * | 2014-04-10 | 2015-10-14 | 广东丹邦科技有限公司 | Multi-chip-embedded flexible printed circuit board and manufacturing method thereof |
| WO2018086201A1 (en) * | 2016-11-08 | 2018-05-17 | 武汉华星光电技术有限公司 | Flexible touch screen and flexible touch display screen |
-
2005
- 2005-05-25 CN CN 200510073862 patent/CN1694600A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976555B (en) * | 2005-12-02 | 2010-12-15 | 日东电工株式会社 | Wired circuit board |
| US8030574B2 (en) | 2007-04-25 | 2011-10-04 | Innocom Technology (Shenzhen) Co., Ltd. | Flexible printed circuit |
| CN101801156B (en) * | 2009-02-06 | 2013-02-27 | 周伯如 | Method for manufacturing flexible printed circuit board and structure thereof |
| CN104185367A (en) * | 2013-05-24 | 2014-12-03 | 英业达科技有限公司 | Flexible printed circuit board and circuit board structure applying flexible printed circuit board |
| CN104981102A (en) * | 2014-04-10 | 2015-10-14 | 广东丹邦科技有限公司 | Multi-chip-embedded flexible printed circuit board and manufacturing method thereof |
| CN104981102B (en) * | 2014-04-10 | 2018-09-18 | 广东丹邦科技有限公司 | A kind of Embedded flexible PCB of multi-chip and its manufacturing method |
| WO2018086201A1 (en) * | 2016-11-08 | 2018-05-17 | 武汉华星光电技术有限公司 | Flexible touch screen and flexible touch display screen |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |