CN101247697B - Reusable flexible printed circuit board - Google Patents
Reusable flexible printed circuit board Download PDFInfo
- Publication number
- CN101247697B CN101247697B CN2007100840682A CN200710084068A CN101247697B CN 101247697 B CN101247697 B CN 101247697B CN 2007100840682 A CN2007100840682 A CN 2007100840682A CN 200710084068 A CN200710084068 A CN 200710084068A CN 101247697 B CN101247697 B CN 101247697B
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- CN
- China
- Prior art keywords
- flexible printed
- printed wiring
- wiring board
- board
- open area
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Structure Of Printed Boards (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
The invention discloses a soft printed circuit board, which includes a flexural soft board. A plurality of electric leads are set on the soft board surface and a protective film covers on a plurality of electric leads and soft board. The printed circuit board has characteristic in that: two opening regions are on two sides of the printed circuit board respectively for showing part of electric leads, and a plurality of electric leads are broken reciprocally and is used as electric conduction junction point.
Description
Technical field
The present invention is meant especially that relevant for a kind of flexible printed wiring board a kind of soft board has the flexible printed wiring board of opening.
Background technology
Along with the information electronic product is compact day by day, flexible printed wiring board (Flexible PrintingCircuit Board; FPC, be called for short soft board) possess advantages such as light weight, ultra-thin, soft, deflection, freedom shape are big, can in the product of the confined space and special shape, carry out the three-dimensional space three-dimensional wiring, make that product meets gently, thin, short, little demand, be widely used in notebook computer, LCD, digital camera, mobile phone and the many consumer electronics.The making of soft board, mainly be with polyimide (Polyimide, be called for short PI) film as base material, be bonded into flexible copper foil substrate with Copper Foil after being covered with one deck solid, this substrate promptly becomes flexible printed wiring board after oversampling circuit develops.
Please consult Figure 1A, Figure 1B and Fig. 1 C simultaneously, positive and negative and generalized section for known flexible printed wiring board.Flexible printed wiring board 1; soft board 10 with a deflection; a plurality of conductor wires 12 are located at the soft board surface; each conductor wire two ends has a conductive junction point 120; one diaphragm 14 is formed at soft board surface and covers all conductor wires 12, and diaphragm has outside two openings 16 are revealed in for the conductive junction point 120 of a pair of opposed polarity respectively, wherein; on each conductive junction point 120, be coated with a tin material weld pad, can supply in conjunction with electronic component.
When flexible printed wiring board 1 during on demand by reflexed, because of soft board 10 and weld pad adhere to unlike material separately, promptly the former has pliability, the latter belongs to hard material partially, so when conductor wire 12 produced bending along with soft board 10, stress concentrated on conductor wire 12 and weld pad binding site easily, and then causes fracture.Flexible printed wiring board is difficult for hot pressing because of there being insulation film to completely cut off to cause when hot pressing again, be difficult for because of heat conduction again, tin can't be fused so that the weld pad of electronic component and flexible printed wiring board is connected, therefore lamina must be changed into the two-ply that leaks copper up and down, and must holing, the tin ball can shed when making hot pressing, but will cause the raising of cost like this, and if occur wrong can increasing during hot pressing and repair difficulty, the situation that causes maintenance to be difficult for.
Therefore the present invention is directed to above-mentioned problem, a kind of flexible printed wiring board that re-uses is provided,, make after the hot pressing bindings degree well and than easy-maintaining, reduce cost again and improve reusability by opening being arranged at the soft board place.
Summary of the invention
Main purpose of the present invention is to provide a recycling flexible printed wiring board, by respectively having an opening at the soft board two ends, can make flexible printed wiring board and electronic component link Du Gengjia, and maintenance is also reusable easily.
Based on above-mentioned purpose, the present invention has disclosed a kind of flexible printed wiring board, comprises the soft board of a deflection, and a plurality of conductor wires are located at this soft board surface, and a diaphragm is covered on a plurality of conductor wires and the soft board; It is characterized in that: flexible printed wiring board respectively has an open area at the place, two ends, in order to manifest a plurality of conductor wires of part, a plurality of conductor wires is disconnected each other, in order to do conductive junction point.
Utilize disclosed flexible printed wiring board, compared to prior art, do not need to make row's tin hole in conductive junction point, and because of the thermosetting of adding sheet is arranged, flexible printed wiring board intensity is strengthened, can prevent that the Copper Foil lead from not rupturing and adherence is better when reflexed, can increase its reusability, reach cost-effective advantage.
Description of drawings
By following detailed description in conjunction with the accompanying drawings, can understand the plurality of advantages of foregoing and the present invention easily, wherein:
Figure 1A is the front schematic view of a known flexible circuit board;
Figure 1B is the reverse side schematic diagram of a known flexible circuit board;
Fig. 1 C is the generalized section of a known flexible circuit board;
Fig. 2 A is the front schematic view of one embodiment of the invention flexible circuit board;
Fig. 2 B is the reverse side schematic diagram of one embodiment of the invention flexible circuit board;
Fig. 2 C is the generalized section of one embodiment of the invention flexible circuit board; And
Fig. 2 D is the reverse side schematic diagram of another embodiment of the present invention flexible circuit board.
Embodiment
The invention provides a kind of flexible printed wiring board that re-uses,, make after the hot pressing binding degree good and, reduce cost again and improve reusability than easy-maintaining by opening being arranged at the soft board place.In order to make narration of the present invention more detailed and complete, please refer to following description and cooperate the following drawings.
See also Fig. 2 A, Fig. 2 B and Fig. 2 C, be one embodiment of the invention one flexible printed wiring board front, reverse side and generalized section.Flexible printed wiring board 2; soft board 20 with a deflection; a plurality of conductor wires 22 are located at soft board 20 surfaces; each conductor wire 22 two ends has a conductive junction point; one diaphragm 24 is formed at the soft board surface and covers all conductor wires 22; diaphragm 24 has two open areas 26 separately with soft board 20; and diaphragm 24 is all identical with the two open area shapes and the position of soft board 20; be built up two districts (26) of windowing mutually; this two window the district be respectively a hollow out zone in the two ends of flexible printed wiring board 2; after being finished, flexible printed wiring board 2 provides respectively outside two ends conductive junction point 220 is revealed in; on each conductive junction point 220, be coated with a tin material weld pad; also include a plurality of thermosetting sheets 28 that add at diaphragm near 26 places, soft board open area again, making can be for linking electronic component behind the hot pressing.
Wherein, conductor wire 22 is that a Copper Foil is made; Add the thermosetting sheet and can select the material that can solidify after the heating for use, as: chemical materials such as silica gel that can solidify after the heating or Instant cement, make flexible printed wiring board 2 more not yielding, avoid the problem of Copper Foil lead 22 fractures.When flexible printed wiring board 2 is windowed the district in making, also make between the conductor wire 22 to disconnect each other, so do not need the row of boring tin hole on conductor wire 22 again, also tin that can fusing is unnecessary flows out.
Please refer to Fig. 2 D, be the reverse side schematic diagram of another embodiment of the present invention flexible printed wiring board.Its structure is close with Fig. 2 B, but it 26 does an extension during to the flexible printed wiring board 2 of outer most edge in design from the open area, and the length that makes is than settling the length that adds the thermosetting sheet for long among Fig. 2 B just.So, flexible printed wiring board 2 when reusing, can prevent because of heat Copper Foil is come off and adherence better, can also prevent because of behind flexible printed wiring board 2 reflexeds shortcoming that Copper Foil can disconnect; The thermosetting of adding sheet 28 is arranged near open area 26 again, be utilize add after 28 heating of thermosetting sheet can hardening characteristics, make open area heating after-hardening in two ends 26 about, like this, flexible printed wiring board is more not yielding, the problem of Copper Foil lead 22 fractures in the time of can avoiding the flexible printed wiring board reflexed.
Disclosed flexible printed wiring board has following advantage: it does not need to make row's tin hole in conductive junction point, because of its conductive junction point is positioned at windowed regions, makes the outflow that disconnects the tin that is beneficial to fusing between each conductor wire mutually; The thermosetting of adding sheet is arranged again, and the characteristic of utilizing its heating back to solidify can make flexible printed wiring board intensity strengthen, and Copper Foil wire fracture and adherence are better in the time of avoiding reflexed, can increase its reusability, reach cost-effective advantage.
Though the present invention illustrates as above with preferred embodiment, so it is not only to terminate in the foregoing description that in order to limit spirit of the present invention and entity of the present invention.So, having in any affiliated technical field and know the knowledgeable usually, the modification of being done in without departing from the spirit or scope of the invention all should be included in the claim scope.
Claims (4)
1. flexible printed wiring board comprises the soft board of a deflection, and a plurality of conductor wires are located at this soft board surface, and a diaphragm is covered on these a plurality of conductor wires and this soft board; It is characterized in that: this flexible printed wiring board respectively has an open area at the place, two ends; described open area makes outside the conductive junction point at these a plurality of conductor wires two ends is revealed in; and described open area disconnects described a plurality of conductor wire each other; wherein this open area is meant that this soft board of its part and this diaphragm all are removed; only keep these a plurality of conductor wires that disconnect mutually; this flexible printed wiring board also comprises a plurality of thermosetting sheets that add; be arranged on this diaphragm and the two ends of contiguous this open area, utilize these a plurality of thermosetting sheets that add to make this flexible printed wiring board more not yielding.
2. flexible printed wiring board as claimed in claim 1 is characterized in that, it is made by the material that can solidify after a kind of heating that this adds the thermosetting sheet.
3. flexible printed wiring board as claimed in claim 2 is characterized in that, the described material that adds the thermosetting sheet is a silica gel.
4. flexible printed wiring board as claimed in claim 1 is characterized in that, also comprises a plurality of tin material weld pads and is arranged on these a plurality of conductor wires of locating this open area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100840682A CN101247697B (en) | 2007-02-14 | 2007-02-14 | Reusable flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100840682A CN101247697B (en) | 2007-02-14 | 2007-02-14 | Reusable flexible printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101247697A CN101247697A (en) | 2008-08-20 |
| CN101247697B true CN101247697B (en) | 2011-04-13 |
Family
ID=39947818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100840682A Expired - Fee Related CN101247697B (en) | 2007-02-14 | 2007-02-14 | Reusable flexible printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101247697B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107835560B (en) * | 2017-10-20 | 2019-10-15 | 维沃移动通信有限公司 | A kind of flexible circuit board and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776493A (en) * | 2005-11-29 | 2006-05-24 | 友达光电股份有限公司 | Liquid crystal display panel module and its flexible printed circuit board |
| CN2817292Y (en) * | 2005-07-25 | 2006-09-13 | 胜华科技股份有限公司 | Flexible printed circuit board |
-
2007
- 2007-02-14 CN CN2007100840682A patent/CN101247697B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2817292Y (en) * | 2005-07-25 | 2006-09-13 | 胜华科技股份有限公司 | Flexible printed circuit board |
| CN1776493A (en) * | 2005-11-29 | 2006-05-24 | 友达光电股份有限公司 | Liquid crystal display panel module and its flexible printed circuit board |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2002-368349A 2002.12.20 |
| JP特开2006-19315A 2006.01.19 |
| JP特开平5-82920A 1993.04.02 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101247697A (en) | 2008-08-20 |
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Legal Events
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20200214 |