CN2645405Y - Double-faced flexible printed circuit board - Google Patents
Double-faced flexible printed circuit board Download PDFInfo
- Publication number
- CN2645405Y CN2645405Y CN 03274804 CN03274804U CN2645405Y CN 2645405 Y CN2645405 Y CN 2645405Y CN 03274804 CN03274804 CN 03274804 CN 03274804 U CN03274804 U CN 03274804U CN 2645405 Y CN2645405 Y CN 2645405Y
- Authority
- CN
- China
- Prior art keywords
- double
- printed circuit
- welding
- flexible printed
- circuit board
- 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.)
- Expired - Lifetime
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- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
Abstract
A double-faced flexible printed circuit board is provided, wherein two sides of a PI film (3) are provided with a plurality of bared welding discs (2), and the double-sided welding discs (2) are one to one correspondence, the welding discs (2) are provided with penetrating holes (5) which penetrate the PI film (3), the walls of holes are provided with metal coatings to communicated with the double-sided welding discs (2). The welding discs with the structure of the utility model can easily control the amount of welding material on the double-sided welding discs when welded. The welding is reliable and is susceptible to short circuit caused by the connection of welding materials, thereby reducing the rework rate and disability rate of welding disc. The utility model is simple in structure and easy to be widely popularized.
Description
[technical field]
The utility model relates to the structure of double-side flexible printed circuit board (FPCB), especially this double-side flexible printed circuit board.
[background technology]
In electron trade, double-side flexible printed circuit board (FPCB-Flexible PrintedCircuit Board) is widely used in each electronic product, plaing a part support to be installed and to be electrically connected electronic devices and components, is the indispensable important components and parts of electron trade.The pad of double-side flexible printed circuit board is the key component that connects in the electronic devices and components process, and its two-sided pad configuration has very big influence concerning welding quality.
At present, the double-side flexible printed circuit board FPCB structures that adopt as shown in Figure 1, 2 more, its FPC plate 1 is to be equipped with several exposed pads 2 and to form PI film 3 two-sided, two-sided pad 2 is corresponding one by one, by the conductings that link to each other of the conduction trough 4 of end.In use there are the following problems for the two-sided FPCB of this kind: because its each pad is all closely being arranged, the gap is very little each other, when welding, and the bad again control of amount of the scolder on the pad of its bottom surface (that is: with the contacted one side of the electronic component that will weld), scolder after a little while, welding effect is poor; Scolder can spill into the gap between the pad for a long time, and causing between the pad on the bottom surface very easily, scolder connects and short circuit or micro-short circuit, rework rate is very high, not only makes troubles to production, and serious also can't repair, cause circuit board to be scrapped, cause great economic loss.
[utility model content]
The purpose of this utility model just provides a kind of double-side flexible printed circuit board, by improvement to pad and corresponding PI membrane structure, make it easily control the amount of scolder on two-sided pad when welding, reliable, the difficult generation scolder of welding connects and the phenomenon of short circuit.
The purpose of this utility model is achieved through the following technical solutions:
A kind of double-side flexible printed circuit board, PI film 3 two-sided are equipped with several exposed pads 2, and two-sided pad 2 is corresponding one by one, and wherein, pad 2 is provided with through hole 5, and through hole 5 passes PI film 3, and hole wall is provided with the coat of metal and makes 2 conductings of two-sided pad.
Technique scheme further is improved to:
The quantity of described through hole in pad 2 can be for one or more.
The shape of described through hole can be the shape of rule.
The shape of described through hole can be irregular shape.
Described through hole can be staggered.
Described pad can laterally outwards be done in the zone at through hole 5 places with expansion.
Described expansion can be circular expansion.
The advantage of the utility model double-side flexible printed circuit board is: control the amount of scolder on two-sided pad when welding easily, welding is reliable, be difficult for making scolder to connect and short circuit, reduce the rework rate and the scrappage of double-side flexible printed circuit board, simple in structure, be easy to promote the use of.
[description of drawings]
Fig. 1 is the structural representation of double-side flexible printed circuit board in the prior art;
Fig. 2 is an A-A profile among Fig. 1;
Fig. 3 is the utility model double-side flexible printed circuit board structural representation;
Fig. 4 is a B-B profile among Fig. 3;
Fig. 5 is a kind of structural representation in other type of the utility model double-side flexible printed circuit board.
Symbol description
1-FPC plate 2-pad 3-PI film
4-conduction trough 5-through hole
[embodiment]
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 3, in the utility model double-faced flexible wiring board 1, PI film 3 two-sided is equipped with several exposed pads 2, two-sided pad 2 is corresponding one by one, the end conduction trough 4 of pad, wherein, pad 2 is provided with through hole 5, through hole 5 passes PI film 3, hole wall is provided with the coat of metal and makes 2 conductings of two-sided pad, like this, if when welding, in the pad of double-faced flexible wiring board 1 bottom surface (that is: with the contacted one side of the electronic component that will weld) unnecessary scolding tin is arranged, unnecessary scolding tin can be seeped into above the double-faced flexible wiring board 1 (that is: with the relative one side in double-faced flexible wiring board 1 bottom surface) by through hole 5, can reduce therefore that scolding tin spills into the gap between the pad 2 and the probability that causes short circuit or micro-short circuit, and welding is reliable; If double-faced flexible wiring board 1 bottom surface scolding tin deficiency, the scolding tin of (with the relative one side in double-faced flexible wiring board 1 bottom surface) can enter double-faced flexible wiring board 1 bottom surface automatically by through hole 5 and replenishes on when welding double-faced flexible wiring board 1, thereby improved welding effect, welding reliability is strengthened.
The quantity of through hole 5 can be one in the pad 2, and in order to make welding effect better, the quantity of through hole 5 can be for a plurality of sometimes.
For the shape of through hole 5, can be the shape of rule according to the actual conditions concrete decision of producing, also can adopt irregular shape.
In several pads 2 of double-faced flexible wiring board 1, mutual through hole 5 can be staggered.
For the less pad 2 of width, mutual through hole 5 can be staggered, and can laterally outwards do with expansion at the pad 2 in through hole 5 zones, to keep the pad conducting, has also avoided short circuit or micro-short circuit between pad simultaneously.Wherein, the most frequently used is circular expansion, as shown in Figure 5, is a kind of structural representation that adopts the double-faced flexible wiring board of circular extended mode.The utility model double-faced flexible circuit board structure is simple, is easy to promote the use of.
Claims (7)
1, a kind of double-side flexible printed circuit board, wherein be equipped with exposed several pads (2) PI film (3) two-sided, and two-sided pad (2) is corresponding one by one, it is characterized in that: pad (2) is provided with through hole (5), through hole (5) passes PI film (3), and hole wall is provided with the coat of metal and makes two-sided pad (2) conducting.
2, double-side flexible printed circuit board as claimed in claim 1 is characterized in that: the quantity of described through hole (5) in pad (2) can be for one or more.
3, double-side flexible printed circuit board as claimed in claim 1 or 2 is characterized in that: the shape of described through hole (5) can be the shape of rule.
4, double-side flexible printed circuit board as claimed in claim 1 or 2 is characterized in that: the shape of described through hole (5) can be irregular shape.
5, double-side flexible printed circuit board as claimed in claim 1 is characterized in that: the through hole (5) in the described pad (2) can be staggered.
6, as claim 1 or 5 described double-side flexible printed circuit boards, it is characterized in that: described pad can laterally outwards be done in the zone that through hole (5) is located with expansion.
7, double-side flexible printed circuit board as claimed in claim 6 is characterized in that: described expansion can be circular expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03274804 CN2645405Y (en) | 2003-09-26 | 2003-09-26 | Double-faced flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03274804 CN2645405Y (en) | 2003-09-26 | 2003-09-26 | Double-faced flexible printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2645405Y true CN2645405Y (en) | 2004-09-29 |
Family
ID=34302052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03274804 Expired - Lifetime CN2645405Y (en) | 2003-09-26 | 2003-09-26 | Double-faced flexible printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2645405Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888741A (en) * | 2010-07-02 | 2010-11-17 | 深圳市顶星数码网络技术有限公司 | Printed circuit board and notebook computer |
| CN1849035B (en) * | 2005-04-12 | 2010-12-22 | 日本梅克特隆株式会社 | Flexible circuit board |
| CN101572992B (en) * | 2008-04-28 | 2012-05-30 | 张�林 | Continuous double-sided flexible printed circuit board and LED lamp strip |
| CN103338582A (en) * | 2013-05-20 | 2013-10-02 | 业成光电（深圳）有限公司 | Soft circuit board, and electronic device with same |
-
2003
- 2003-09-26 CN CN 03274804 patent/CN2645405Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1849035B (en) * | 2005-04-12 | 2010-12-22 | 日本梅克特隆株式会社 | Flexible circuit board |
| CN101572992B (en) * | 2008-04-28 | 2012-05-30 | 张�林 | Continuous double-sided flexible printed circuit board and LED lamp strip |
| CN101888741A (en) * | 2010-07-02 | 2010-11-17 | 深圳市顶星数码网络技术有限公司 | Printed circuit board and notebook computer |
| CN101888741B (en) * | 2010-07-02 | 2012-05-02 | 深圳市顶星数码网络技术有限公司 | Printed circuit board and notebook computer |
| CN103338582A (en) * | 2013-05-20 | 2013-10-02 | 业成光电（深圳）有限公司 | Soft circuit board, and electronic device with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130926 Granted publication date: 20040929 |