CN201066955Y - A flexible printed line board - Google Patents
A flexible printed line board Download PDFInfo
- Publication number
- CN201066955Y CN201066955Y CNU200720120997XU CN200720120997U CN201066955Y CN 201066955 Y CN201066955 Y CN 201066955Y CN U200720120997X U CNU200720120997X U CN U200720120997XU CN 200720120997 U CN200720120997 U CN 200720120997U CN 201066955 Y CN201066955 Y CN 201066955Y
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- CN
- China
- Prior art keywords
- golden finger
- stiffening plate
- coverlay
- flexible printed
- lead wire
- 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
The utility model discloses a flexible printed circuit, which comprises an adhering layer, a flexible circuit, a golden finger and a reinforcement pad. The flexible circuit is wrapped by the adhering layer. The golden finger is bore on the end of the adhering layer and is connected with the flexible circuit. The reinforcement pad is attached to the back face of the end of the adhering layer bearing the golden finger. The external edge of the end of the adhering layer is placed in the range of the reinforcement pad. With the technical proposal, a distance is formed between the terminal of the electroplating lead of the flexible printed circuit and the edge of the reinforcement pad; the bearing function of the reinforcement pad is not affected at all. When in use, the terminal of the electroplating lead is not directly contacted and rubbed with a connector or other external objects because of the inner shrinking process of the electroplating lead; so the condition of the short circuit of the golden finger caused by the terminal being rubbed and unwrapped or metal debris falling is avoided, which effectively enhances the reliability of connection and increases the service life of a FPC.
Description
[technical field]
The utility model relates to a kind of flexible printed wiring board.
[background technology]
The development and the extensive use of flexible printed wiring board (FPC) are that its structure is flexible, volume little (being made of film) in light weight because it has significant superiority.It can also be done dynamic deflection, curls and fold etc. except that static deflection.It can be expanded to three dimensions, improved the degree of freedom and the flexibility of circuit design and Design of Mechanical Structure, can connect up on the plane, reduced the interface tie point at X, Y, Z, both reduce the mistake of complete machine workload and assembling, improved the reliability and stability of electronic equipment whole system again greatly.The application of flexible printed board is extensive, as aspects such as computer, communication equipment, instrument and meter, medicine equipment, military and space.As the part of electronic equipment, flexible printed wiring board must connect together competence exertion with other part or main circuit board and go out its effect.Dual mode is arranged on type of attachment usually: a kind of is welding, and promptly the mode by tin cream welding or ACF pressure welding is welded to the pad on this flexible printed wiring board on other the wiring board or electronic component; Another is to peg graft, promptly make the pad of finger-shaped in the flexible printed wiring board outline edge, become golden finger after the gold-plated processing, can directly insert in the connector of another piece wiring board, realize conducting, the network interface card clamp and the display card clamp that have the plug function in the similar therewith PC are realized with the circuit of mainboard interconnected by the draw-in groove that golden finger inserts on the mainboard.
Different with golden finger clamp in the rigidity printed wiring board is, because the material softness of flexible printed wiring board own, mechanical strength is low, so can not directly insert in the connector, as shown in Figure 1, must increase the stiffening plate 1 of a hard, the back side that is attached to golden finger as auxiliary layer is to increase the mechanical strength at golden finger place, so that realize the plug function better.
This making flow process that is provided with the flexible printed wiring board of grafting golden finger is: gold-plated → printing word → reinforcing plate → pressure stiffening plate → punching out product design that Copper Foil severing → digital control hole drilling → black hole → copper facing → press dry film → exposure → development → etching → stripping → two sides pastes epiphragma → hot pressing coverlay → pad, the stiffening plate at golden finger and its back side is once rushed out behind the punch extermal form, can realize the plug function of golden finger.The profile of golden finger 2 places and product has certain distance, as shown in Figure 2, FPC pad in the course of processing is gold-plated herein, this step needs galvanization, pad that must needs are gold-plated is guided to the edges of boards of whole product by electroplate lead wire 3 and is linked to each other with the positive and negative polarities of electroplating bath, and when electroplate lead wire 3 was cut off with profile, lead terminal was mutually concordant with stiffening plate, stay length W to be about the electroplate lead wire 3 of 0.3mm, the flexible printed wiring board of finished product as shown in Figure 3.Product in assembling process if through repeatedly the plug, terminal electroplate lead wire is joined the action that can repeat to plug several times in the process in trial assembly, because the connector bayonet socket is tight, connector can be run into foremost in the golden finger position when injecting connector draw-in groove limit, the end that is to say electroplate lead wire can be run into the draw-in groove limit, can even drop because of the friction perk, these metal fragments can make the golden finger short circuit as if dropping between the golden finger pad, burn out whole electric equipment.
[summary of the invention]
Main purpose of the present utility model is: a kind of reliability of effective raising connection, the flexible printed wiring board in useful life are provided.
For achieving the above object, the utility model proposes a kind of flexible printed wiring board, comprise coverlay, flexible circuitry, golden finger, stiffening plate, this coverlay coats described flexible circuitry, this golden finger is carried on described coverlay end, and be connected with described flexible circuitry, this stiffening plate fits in the back side, described coverlay end of this carrying golden finger; Described coverlay end outer rim is positioned at described stiffening plate scope, and has certain distance between the described stiffening plate outer rim.。
Or a kind of flexible printed wiring board, comprise coverlay, flexible circuitry, stiffening plate; This coverlay coats described flexible circuitry, exposes to described coverlay place at described flexible circuitry end and is provided with golden finger, and described golden finger end extends the electroplate lead wire that is used to electroplate; This stiffening plate fits in this back side, coverlay place that is provided with golden finger; Contract in the described electroplate lead wire end, be positioned at described stiffening plate scope, and have certain distance between the described stiffening plate outer rim.
Above-mentioned flexible printed wiring board, described electroplate lead wire length is less than the terminal distance to described stiffening plate outer rim of described electroplate lead wire.
Described electroplate lead wire length is less than or equal to 0.1 millimeter.
The distance of the terminal extremely described stiffening plate outer rim of described electroplate lead wire is more than or equal to 0.2 millimeter.
Because adopted above scheme, there is a segment distance at the end of the electroplate lead wire of flexible printed wiring board and stiffening plate edge, the supporting role of stiffening plate is at all unaffected; In use, because contract processing in electroplate lead wire has, its end can directly not touch the connector that rubs, other external objects, thereby also just avoided being improved the reliability of connection and the useful life of FPC itself effectively by the situation of friction perk or drop metal fragment and then the short circuit of initiation golden finger.
[description of drawings]
Fig. 1: structure schematic diagram with flexible printed wiring board of grafting function.
Fig. 2: the Facad structure schematic diagram of prior art flexible printed wiring board.
Fig. 3: the golden finger of prior art flexible printed wiring board and product design schematic diagram.
Fig. 4: the schematic diagram of the subpunch outage plating lead-in wire of the utility model embodiment.
Fig. 5: the golden finger of the utility model embodiment and product design schematic diagram.
[embodiment]
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
The flexible printed wiring board that this is routine, making by following flow process: that Copper Foil severing → digital control hole drilling → black hole → copper facing → press dry film → exposure → development → etching → stripping → two sides pastes epiphragma → hot pressing coverlay → pad is gold-plated → and printing word → towards electroplate lead wire → reinforcing plate → pressure stiffening plate → punching out product design, product is assembled on the connector and tests.After wherein having dashed electroplate lead wire, the final profile outer rim of the terminal distance product of electroplate lead wire has the distance more than or equal to 0.2mm, can guarantee that fully the end of electroplate lead wire can not run into connector in use.
As accompanying drawing 4, shown in Figure 5, this routine flexible printed wiring board comprises coverlay 4, flexible circuitry, golden finger 2, stiffening plate 1, and coverlay 4 coats flexible circuitry, and golden finger is carried on coverlay 4 ends, golden finger 2 one ends are connected with flexible circuitry, and the other end extends electroplate lead wire 3; Before reinforcing plate 1, this example thrusts lead district 5 earlier, the final profile of the relative product in position that thrusts has the processing of contracting in, the end that has dashed coverlay end, back outer rim, electroplate lead wire 3 is not concordant with the final profile of product, one section distance W 1 more than or equal to 0.2mm is arranged, and the length W2 of electroplate lead wire 3 self is less than or equal to 0.1mm.Dashed behind the electroplate lead wire 3 reinforcing plate 1 again, press stiffening plate, the last shape of towards product design the time, going out stiffening plate again, this moment, stiffening plate was consistent with the final profile of finished product, and there is a segment distance at the end of coverlay end outer rim, electroplate lead wire 3 and stiffening plate 1 edge, and the supporting role of stiffening plate is at all unaffected.In use, the processing because electroplate lead wire contracts in having, its end can not run into extraneous object, thereby has just avoided by the friction perk yet and then cause the situation of short circuit, improves the reliability of electronic equipment and the useful life of FPC itself effectively.
Comparative example:
A double-faced flexible printed wiring board, as follows according to manufacture craft flow process of the present utility model: that two-sided Copper Foil severing → digital control hole drilling → black hole → copper facing → press dry film → exposure → developments → etching → stripping → two sides pastes epiphragma → hot pressing coverlay → pad is gold-plated → and printing word → towards electroplate lead wire → reinforcing plate → pressure stiffening plate → punching out product design, product assembles to be tested.Get connector and carry out the plug test, the record result, detection has or not short circuit.The results are shown in chart 1.
Same this double-faced flexible printed wiring board of making, if according to way before, its manufacture craft flow process is as follows: gold-plated → printing word → reinforcing plate → pressure stiffening plate → punching out product design that Copper Foil severing → digital control hole drilling → black hole → copper facing → press dry film → exposure → development → etching → stripping → two sides pastes epiphragma → hot pressing coverlay → pad, get connector and carry out the plug test, the record result, detection has or not short circuit.The results are shown in chart 1.
| Project | Test products quantity | The plug number of times | The short circuit ratio |
| Technological process of the present utility model | 100 | 400 | 0％ |
| The technological process of prior art | 100 | 400 | 5％ |
Claims (5)
1. flexible printed wiring board, comprise coverlay, flexible circuitry, golden finger, stiffening plate, this coverlay coats described flexible circuitry, this golden finger is carried on described coverlay end, and be connected with described flexible circuitry, this stiffening plate fits in the back side, described coverlay end of this carrying golden finger; It is characterized in that: described coverlay end outer rim is positioned at described stiffening plate scope, and has certain distance between the described stiffening plate outer rim.
2. a flexible printed wiring board comprises coverlay, flexible circuitry, stiffening plate; This coverlay coats described flexible circuitry, exposes to described coverlay place at described flexible circuitry end and is provided with golden finger, and described golden finger end extends the electroplate lead wire that is used to electroplate; This stiffening plate fits in this back side, coverlay place that is provided with golden finger; It is characterized in that: contract in the described electroplate lead wire end, be positioned at described stiffening plate scope, and have certain distance between the described stiffening plate outer rim.
3. flexible printed wiring board as claimed in claim 1 or 2 is characterized in that: described electroplate lead wire length is less than the terminal distance to described stiffening plate outer rim of described electroplate lead wire.
4. flexible printed wiring board as claimed in claim 3 is characterized in that: described electroplate lead wire length is less than or equal to 0.1 millimeter.
5. flexible printed wiring board as claimed in claim 3 is characterized in that: the distance of the terminal extremely described stiffening plate outer rim of described electroplate lead wire is more than or equal to 0.2 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720120997XU CN201066955Y (en) | 2007-06-26 | 2007-06-26 | A flexible printed line board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720120997XU CN201066955Y (en) | 2007-06-26 | 2007-06-26 | A flexible printed line board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066955Y true CN201066955Y (en) | 2008-05-28 |
Family
ID=39484140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720120997XU Expired - Lifetime CN201066955Y (en) | 2007-06-26 | 2007-06-26 | A flexible printed line board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066955Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469682A (en) * | 2010-11-18 | 2012-05-23 | 瀚宇彩晶股份有限公司 | Flexible printed circuit |
| CN103060807A (en) * | 2012-12-28 | 2013-04-24 | 苏州米达思精密电子有限公司 | A regular-array etching reinforcement aluminum sheet structure with no connection points |
| CN104427783A (en) * | 2013-08-19 | 2015-03-18 | 宏启胜精密电子(秦皇岛)有限公司 | A flexible printed circuit board having golden fingers and manufacturing method thereof |
| CN105101675A (en) * | 2014-04-23 | 2015-11-25 | 上海和辉光电有限公司 | Gold finger gilding method and structure of flexible printed circuit board |
| CN106129672A (en) * | 2016-06-01 | 2016-11-16 | 华为技术有限公司 | Golden finger connector, circuit board, socket connector and associated component thereof and equipment |
| CN106211569A (en) * | 2016-09-06 | 2016-12-07 | 京东方科技集团股份有限公司 | A kind of backlight golden finger structure and display device |
| CN106900136A (en) * | 2015-12-21 | 2017-06-27 | 青岛海信宽带多媒体技术有限公司 | A kind of printed circuit board (PCB) of optical module |
| CN108684148A (en) * | 2018-06-19 | 2018-10-19 | 苏州市华扬电子股份有限公司 | A method of whether leaking reinforcing plate using electrical measurement mode detection circuit board |
| CN109683752A (en) * | 2019-01-15 | 2019-04-26 | 深圳市华科创智技术有限公司 | A kind of capacitive touch screen and terminal device |
| CN110007215A (en) * | 2019-04-30 | 2019-07-12 | 厦门市铂联科技股份有限公司 | A kind of open circuit short circuit electric measuring method of FPC |
| CN110933848A (en) * | 2019-12-02 | 2020-03-27 | 昆山圆裕电子科技有限公司 | FPC (Flexible printed Circuit) cable pasting process |
| US10912200B2 (en) | 2015-12-21 | 2021-02-02 | Hisense Broadband Multimedia Technologies Co., Ltd. | Pluggable printed circuit board and optical module having a gap between solder resist and electro-conductive contact sheet group |
-
2007
- 2007-06-26 CN CNU200720120997XU patent/CN201066955Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469682A (en) * | 2010-11-18 | 2012-05-23 | 瀚宇彩晶股份有限公司 | Flexible printed circuit |
| CN103060807A (en) * | 2012-12-28 | 2013-04-24 | 苏州米达思精密电子有限公司 | A regular-array etching reinforcement aluminum sheet structure with no connection points |
| CN104427783A (en) * | 2013-08-19 | 2015-03-18 | 宏启胜精密电子(秦皇岛)有限公司 | A flexible printed circuit board having golden fingers and manufacturing method thereof |
| CN104427783B (en) * | 2013-08-19 | 2017-08-25 | 宏启胜精密电子(秦皇岛)有限公司 | Flexible PCB with golden finger and preparation method thereof |
| CN105101675A (en) * | 2014-04-23 | 2015-11-25 | 上海和辉光电有限公司 | Gold finger gilding method and structure of flexible printed circuit board |
| US10912200B2 (en) | 2015-12-21 | 2021-02-02 | Hisense Broadband Multimedia Technologies Co., Ltd. | Pluggable printed circuit board and optical module having a gap between solder resist and electro-conductive contact sheet group |
| CN106900136A (en) * | 2015-12-21 | 2017-06-27 | 青岛海信宽带多媒体技术有限公司 | A kind of printed circuit board (PCB) of optical module |
| CN106900136B (en) * | 2015-12-21 | 2021-06-04 | 青岛海信宽带多媒体技术有限公司 | Printed circuit board of optical module |
| CN106129672A (en) * | 2016-06-01 | 2016-11-16 | 华为技术有限公司 | Golden finger connector, circuit board, socket connector and associated component thereof and equipment |
| CN106211569A (en) * | 2016-09-06 | 2016-12-07 | 京东方科技集团股份有限公司 | A kind of backlight golden finger structure and display device |
| US10973121B2 (en) | 2016-09-06 | 2021-04-06 | Boe Technology Group Co., Ltd. | Backlight golden finger structure and display device |
| CN106211569B (en) * | 2016-09-06 | 2019-10-25 | 京东方科技集团股份有限公司 | A kind of backlight golden finger structure and display device |
| CN108684148A (en) * | 2018-06-19 | 2018-10-19 | 苏州市华扬电子股份有限公司 | A method of whether leaking reinforcing plate using electrical measurement mode detection circuit board |
| CN109683752A (en) * | 2019-01-15 | 2019-04-26 | 深圳市华科创智技术有限公司 | A kind of capacitive touch screen and terminal device |
| CN110007215A (en) * | 2019-04-30 | 2019-07-12 | 厦门市铂联科技股份有限公司 | A kind of open circuit short circuit electric measuring method of FPC |
| CN110933848A (en) * | 2019-12-02 | 2020-03-27 | 昆山圆裕电子科技有限公司 | FPC (Flexible printed Circuit) cable pasting process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen BYD Electronic Component Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.4.25 to 2015.11.14 Contract record no.: 2008440000067 Denomination of utility model: Preprocessing method for image transfer of flexible PCB (printed circuit board) Granted publication date: 20080528 License type: Exclusive license Record date: 20080504 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.25 TO 2015.11.14 Name of requester: BIYADI ELECTRON MEMBER CO., LTD., SHENZHEN CITY Effective date: 20080504 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080528 |