CN103091599A - Detection method for circuit on-off of soft circuit board - Google Patents
Detection method for circuit on-off of soft circuit board Download PDFInfo
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- CN103091599A CN103091599A CN2013100304356A CN201310030435A CN103091599A CN 103091599 A CN103091599 A CN 103091599A CN 2013100304356 A CN2013100304356 A CN 2013100304356A CN 201310030435 A CN201310030435 A CN 201310030435A CN 103091599 A CN103091599 A CN 103091599A
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Abstract
The invention relates to a detection method for circuit on-off of a soft circuit board. According to the method, a chip is used. A reference pin and a plurality of detection pins which are correspondingly connected with gold fingers on the soft circuit board are arranged on the chip. When the gold fingers on the soft circuit board are sequentially and orderly detected, a to-be-tested gold finger is enabled to serve as a test point, the reference pin serves as a reference point, difference value between the to-be-tested gold finger and the reference point, and on-off of the circuit is judged through comparison of the difference value with a specified constant. According to the detection method for the circuit on-off of the soft circuit board, the fact that the problems exist in various channels on the soft circuit board can be detected, and therefore detection time in volume production is reduced by a large margin, and meanwhile oxidation in the surface of pouring copper of the soft circuit board can be prevented.
Description
Technical field
the present invention relates to a kind of detection method of flexible circuit board circuit on-off, refer in particular to the detection method of flexible circuit board circuit on-off fast and accurately.
Background technology
fPC(Flexible Printed Circuit Board) being flexible print circuit board, is the P.e.c. made from flexible insulating substrate, has advantages of that a lot of rigid printed circuit boards of answering do not possess.For example it can free bend, coiling, folding, can require to arrange arbitrarily according to space layout, and mobile and flexible arbitrarily in three dimensions, thereby arrive integrated that the components and parts assembling is connected with wire.Utilize FPC can greatly dwindle the volume of electronic product, applicable electronic product is to the requirement of high density, miniaturization, high reliability future development.Therefore FPC is in the field such as space flight, military affairs, mobile communication, laptop computer, computer peripheral equipment, PDA, digital camera or produce and be widely used.FPC also has good thermal diffusivity and weldability and is easy to the advantages such as load, integrated cost be low, and the design of soft or hard combination has also made up slightly not enough on the assembly load-bearing capacity of flexible parent metal to a certain extent.Flexible print circuit board have single face, two-sided and multilayer board minute.The base material adopted be take polyimide copper clad lamination as main, and this kind of material thermal resistance is high, good stability of the dimension, with the coverlay that has mechanical protection and good electrical insulating property concurrently, by compacting, forms final products.Top layer and inner conductor two-sided, multilayer printed wiring board are realized the electrical connection of ectonexine circuit by metallization.
along with the high-density flexible circuit board high speed development in this year, traditional circuit manufacturing process is just in the face of more challenge, with respect to traditional circuit plate manufacturing process, the technology difficulty of high-density flexible circuit board, complexity can be described as and be multiplied, and directly have influence on manufacture.Present stage FPC industry is along with the development of electron trade, and the flexible circuit board of fine-line is on the increase, and causes thus having brought no small challenge to FPC on off test aspect.
in the circuit on-off field tests of flexible circuit board, common methods is by manual detection at present, for each golden finger on FPC carries out on off test, described FPC is connected with the main frame of computer by card extender, then with finger, on the golden finger of FPC, slide successively, check whether the induction amount that each golden finger produces all changes, if variation has occurred, show that this golden finger circuit is normal; If do not change, do not show that the circuit of this golden finger is abnormal, must artificially to continue to determine the end be short circuit or open circuit simultaneously.
although said method also can detect whether circuit on-off of FPC, need manually to detect, so therefore time and effort consuming need to solve above problem for users provide a kind of new detection method.
Summary of the invention
technical matters to be solved by this invention is a kind of method how simple, fast detecting flexible circuit board circuit on-off is provided.
to achieve these goals, the invention provides a kind of detection method of flexible circuit board circuit on-off, described method relates to a kind of chip, described chip is provided with a low reference pin and several connected detection pins corresponding to golden finger on flexible circuit board, successively during the golden finger on the sequence detection flexible circuit board, using golden finger to be detected as test point, described low reference pin is as a reference point, detect the difference between this golden finger to be detected and reference point, if described difference equals the constant of regulation, and the difference of other golden finger does not all change simultaneously, the circuit that shows this golden finger to be detected is path, if described difference is less than the constant of regulation, the circuit that shows this golden finger to be detected is to open circuit.
compared with prior art, detection method of the present invention, whether can detect fast upper each passage of FPC has problem, the detection time while therefore significantly having shortened volume production, simultaneously due to detect the time do not need to go induction to detect with hand, so can prevent the oxidation on FPC paving copper surface; Moreover the present invention not only can test each golden finger whether break-make has occurred, and can test between golden finger whether have short circuit, therefore can better analyze the state of FPC, easy-to-look-up reason, correct manufacturing process.
The accompanying drawing explanation
fig. 1 is the connected mode according to flexible circuit board wireline inspection break-make of the present invention.
Embodiment
below in conjunction with drawings and Examples, the present invention is further illustrated.
in the detection method of flexible circuit board circuit on-off of the present invention, described method relates to a kind of chip, described chip is provided with a low reference pin and several and the corresponding connected detection pin of golden finger on FPC, during golden finger on sequence detection FPC successively, using golden finger to be detected as test point, described low reference pin is as a reference point, detect the difference between this golden finger to be detected and reference point, be called fiducial value, if this fiducial value equals the constant of regulation, and the fiducial value of other golden finger does not all change simultaneously, it is the fiducial value that other golden finger all keeps its acquiescence, the circuit that shows the golden finger that this is to be detected is path, if this fiducial value is less than the constant of regulation, the circuit that shows the golden finger that this is to be detected is to open circuit.In above-mentioned detection method, except the fiducial value that detects golden finger to be detected equals the constant of regulation, if the fiducial value of other golden fingers also equals the constant of regulation, show that short circuit has occurred for this golden finger to be measured and other golden finger.Constant of the present invention is to determine according to the maximal value of 9 bit A/D converters, 1 bit sign position, 8 bit data positions, span is between-256 to+255, and under perfect condition, the value of this constant is 255, in the reality test, due to the existence of error, allowing the value of constant is 200.
by above-mentioned method of testing, whether the circuit not only tested out fast and effectively on upper each golden finger of FPC has extremely, and can better analyze the state of FPC, easy-to-look-up reason, thus correct manufacturing process.
in order to realize above-mentioned method of testing, please refer to shown in Fig. 1, device for detection of the FPC circuit on-off of the present invention comprises circuit board 11 and card extender 12, described circuit board 11 is provided with several chips 110 and the relay 111 be connected with described chip 110 respectively, described relay 111 is corresponding with the golden finger of FPC, by card extender 12, interconnect, the number of the upper golden finger of described FPC has determined the number of described chip 110, in addition, also have a total chip to be used for selecting other chip as selector switch, several parallel output terminals of described chip 110 connect corresponding test loop, each test loop all comprises a relay 111, when described chip 110 has an output terminal to be high level, activate the corresponding test loop connected, thereby the circuit of this golden finger to be detected is path, described relay 111 work, golden finger is connected with the earth.
in method of testing of the present invention, when the circuit on-off of the upper golden finger of needs tests FPC, at first FPC is connected with card extender, and then, by described card extender and the corresponding connection of relay on circuit board, by said apparatus, just can completes the on off test of FPC circuit.By said method, the oxidation on the FPC that causes in the time of not only can avoiding with manual test paving copper surface, and can detect fast upper each passage of FPC and whether problem is arranged, the detection time while therefore significantly having shortened volume production.
Claims (10)
1. the detection method of a flexible circuit board circuit on-off, described method relates to a kind of chip, described chip is provided with a low reference pin and several connected detection pins corresponding to golden finger on flexible circuit board, it is characterized in that: successively during the golden finger on the sequence detection flexible circuit board, using golden finger to be detected as test point, described low reference pin is as a reference point, detect the difference between this golden finger to be detected and reference point, if described difference equals the constant of regulation, and the difference of other golden finger does not all change simultaneously, the circuit that shows this golden finger to be detected is path, if described difference is less than the constant of regulation, the circuit that shows this golden finger to be detected is to open circuit.
2. detection method as claimed in claim 1, it is characterized in that: the difference of described golden finger to be detected equals outside the constant of regulation, if the difference of other golden fingers also equals the constant of regulation, show that short circuit has occurred for this golden finger to be measured and other golden finger.
3. detection method as claimed in claim 1 or 2 is characterized in that: described constant is to determine according to the maximal value of nine bit A/D converters.
4. detection method as claimed in claim 3 is characterized in that: the span of described constant is between-256 to+255.
5. detection method as claimed in claim 4, it is characterized in that: described constant is 255.
6. the device for the detection flexible circuit board circuit on-off of realizing the described method of claim 1, comprise circuit board and card extender, described circuit board is provided with several chips and the relay be connected with described chip respectively, described relay is corresponding with the golden finger of flexible circuit board, by card extender, interconnects.
7. device as claimed in claim 6 is characterized in that: several parallel output terminals of described chip connect corresponding test loop, and each test loop all comprises a relay.
8. detection method as claimed in claim 7 is characterized in that: when described chip has an output terminal to be high level, activate the corresponding test loop connected, thereby the circuit of this golden finger to be detected is path, and described relay work, golden finger is connected with the earth.
9. device as claimed in claim 6, it is characterized in that: on described flexible circuit board, the number of golden finger has determined the number of described chip.
10. device as claimed in claim 6, it is characterized in that: described chip comprises a total chip, its as selector switch for selecting other chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100304356A CN103091599A (en) | 2013-01-28 | 2013-01-28 | Detection method for circuit on-off of soft circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100304356A CN103091599A (en) | 2013-01-28 | 2013-01-28 | Detection method for circuit on-off of soft circuit board |
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| CN103091599A true CN103091599A (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013100304356A Pending CN103091599A (en) | 2013-01-28 | 2013-01-28 | Detection method for circuit on-off of soft circuit board |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810638A (en) * | 2015-05-19 | 2015-07-29 | 合肥京东方光电科技有限公司 | Printed circuit board, connection detection method of flexible circuit board and printed circuit board and display panel |
| CN105021938A (en) * | 2014-04-30 | 2015-11-04 | 佰欧特株式会社 | Inspection device |
| CN106526362A (en) * | 2016-10-25 | 2017-03-22 | 上海移远通信技术股份有限公司 | Test system of wireless communication module |
| CN107817438A (en) * | 2017-09-15 | 2018-03-20 | 郑州云海信息技术有限公司 | A kind of golden finger interface of simulating aoxidizes the method for testing and device for causing hardware error |
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| CN2433633Y (en) * | 2000-01-24 | 2001-06-06 | 神达电脑股份有限公司 | Tester for line of conducting wire |
| CN101071150A (en) * | 2006-05-12 | 2007-11-14 | 上海华仕德电路技术有限公司 | Flexible circuit board circuit on-off detecting method |
| CN201812020U (en) * | 2010-10-20 | 2011-04-27 | 天津豪风机电设备有限公司 | Automotive wiring harness conduction detecting system |
| CN102262196A (en) * | 2010-05-27 | 2011-11-30 | 纬创资通股份有限公司 | Circuit board and circuit detection method |
| CN102401875A (en) * | 2010-09-07 | 2012-04-04 | 鸿富锦精密工业（深圳）有限公司 | Test circuit for flexible printed circuit board |
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2013
- 2013-01-28 CN CN2013100304356A patent/CN103091599A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2433633Y (en) * | 2000-01-24 | 2001-06-06 | 神达电脑股份有限公司 | Tester for line of conducting wire |
| CN101071150A (en) * | 2006-05-12 | 2007-11-14 | 上海华仕德电路技术有限公司 | Flexible circuit board circuit on-off detecting method |
| CN102262196A (en) * | 2010-05-27 | 2011-11-30 | 纬创资通股份有限公司 | Circuit board and circuit detection method |
| CN102401875A (en) * | 2010-09-07 | 2012-04-04 | 鸿富锦精密工业（深圳）有限公司 | Test circuit for flexible printed circuit board |
| CN201812020U (en) * | 2010-10-20 | 2011-04-27 | 天津豪风机电设备有限公司 | Automotive wiring harness conduction detecting system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021938A (en) * | 2014-04-30 | 2015-11-04 | 佰欧特株式会社 | Inspection device |
| CN105021938B (en) * | 2014-04-30 | 2018-11-09 | 佰欧特株式会社 | Check device |
| CN104810638A (en) * | 2015-05-19 | 2015-07-29 | 合肥京东方光电科技有限公司 | Printed circuit board, connection detection method of flexible circuit board and printed circuit board and display panel |
| US10739415B2 (en) | 2015-05-19 | 2020-08-11 | Boe Technology Group Co., Ltd. | Printed circuit board and detection method for detecting connection between printed circuit board and flexible circuit board, and display panel |
| CN106526362A (en) * | 2016-10-25 | 2017-03-22 | 上海移远通信技术股份有限公司 | Test system of wireless communication module |
| CN107817438A (en) * | 2017-09-15 | 2018-03-20 | 郑州云海信息技术有限公司 | A kind of golden finger interface of simulating aoxidizes the method for testing and device for causing hardware error |
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Application publication date: 20130508 |