CN101173917B - Fast criterion for through hole ability of black hole agent used for flexible printed circuit board - Google Patents
Fast criterion for through hole ability of black hole agent used for flexible printed circuit board Download PDFInfo
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- CN101173917B CN101173917B CN200610063413XA CN200610063413A CN101173917B CN 101173917 B CN101173917 B CN 101173917B CN 200610063413X A CN200610063413X A CN 200610063413XA CN 200610063413 A CN200610063413 A CN 200610063413A CN 101173917 B CN101173917 B CN 101173917B
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- black hole
- hole agent
- filter paper
- qualitative filter
- ability
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Abstract
The invention discloses a quick judging method for the perforating ability of black hole agent used for flexible printed circuit board (PCB), which is characterized in comprising the following steps: (1) wetting a sheet of qualitative filter paper and adhering the paper in a hopper, (2) placing the qualitative filter paper along with the hopper on an Erlenmeyer flask with wet internal wall, (3) filtering the black hole agent through the qualitative filter paper along a straight rod with smooth surface and collecting the black hole agent in the Erlenmeyer flask, (4) recording the filter time by use of a chronograph, and observing the speed at which the black hole agent is dispersed upwards on the wall of the Erlenmeyer flask, and (5) dipping and dripping the black hole agent on the qualitative filter paper, and observing the situations in which the black hole agent is dispersed around on the qualitative filter paper after setting time. By recording the full filter time of the black hole agent, the speed at which the filtrate is diffused upwards on the wall of the Erlenmeyer flask, as well as whether separate water spots appear, the invention has the advantages of detecting whether precipitation of the black hole agent appears in time, accurately determining whether the perforating ability is normal, remarkably reducing the open-cell copper defect rate in the subsequent perforating electroplating step, and markedly enhancing the quality and reliability of FPC products.
Description
Technical field
The present invention relates to the manufacturing of printed-wiring board (PWB), especially relate to a kind of fast criterion for through hole ability of black hole agent used for flexible printed circuit board.
Background technology
Flexible print circuit board (Flexible Printed Circuit board; Abbreviation FPC) in the manufacture process; There is the boring melanism to handle promptly black hole (Black Hole) step: to comprise to after making hole wall positively charged with whole hole agent earlier in the hole of boring on the FPC; Make the carbon dust of hole inwall sclerozone negative electricity particulate through black hole agent, with little erosion mode the carbon dust on the copper face is peeled off, only keeping on the inwall insulation position, hole has one deck carbon dust; In order to after copper facing, forming via, with each bar lead connection of the different layers that is connected to said via.Existing FPC is to adopt a kind of data aggregation and clearing system test pieces (Daisy [Data acquisition and interpretation system] TestVehicle with the criterion of the through hole ability of black hole agent; Be called for short DTV) after simulation is produced on the production line of black hole; Be placed on Hull cell and make test film, judge the through hole ability of black hole agent according to every round copperizing continuously number on the sheet.Because black hole agent is to comprise nanoscale carbon dust, sal tartari and organic colloidal solution, its colloidal solid is subject to the other factors influence and becomes big and produce deposition, and its through hole ability is descended unusually.Yet, adopt above-mentioned test pieces to be difficult in time find this variation of black hole agent black hole through hole ability, cause follow-up the electroplates in hole can produce the defective products of no copper in many holes, have a strong impact on the quality and the reliability of FPC product.
Summary of the invention
Technical matters to be solved by this invention is the deficiency that remedies above-mentioned prior art; A kind of fast criterion for through hole ability of black hole agent used for flexible printed circuit board is proposed; Can find in time whether black hole agent produces deposition; Whether the through hole ability is unusual, to avoid the defective products of no copper in follow-up the electroplates in hole generating step hole.
Technical matters of the present invention solves through following technical scheme.
The fast criterion for through hole ability of this black hole agent used for flexible printed circuit board is the method that a kind of qualitative filter paper filters, and is characterized in having successively following steps:
(1) qualitative filter paper is attached in the funnel after moistening;
(2) qualitative filter paper is placed on the moistening conical flask of inwall together with funnel;
(3) black hole agent is filtered through qualitative filter paper along ganoid straight rod, and be collected in the conical flask;
(4), observe the rate of propagation that on the conical flask wall, makes progress of filtrating with the timer record filtering time.
Technical matters of the present invention solves through following further technical scheme.
Increase step (5) and black hole agent is dipped in drip on qualitative filter paper, behind setting-up time, observe black hole agent qualitative filter paper to around the situation of dispersing.
Said black hole agent is the black hole agent of from the black hole of FPC, sampling.
Said ganoid straight rod is a directly rod of glass.
The beneficial effect of the present invention and prior art contrast is:
The water mark circle whether the present invention makes progress rate of propagation and occur separating on the conical flask wall through the complete filter time of record black hole agent, filtrating; Can find in time whether black hole agent produces deposition; Judge accurately whether its through hole ability is normal; With remarkable minimizing in the hole of follow-up the electroplates in hole step the copper fraction defective, obviously improve the quality and the reliability of FPC product.
Description of drawings
Below in conjunction with embodiment and contrast accompanying drawing the present invention is further described.
Fig. 1 is that embodiment of the present invention is filtered synoptic diagram;
Fig. 2 is the synoptic diagram that separation appears in the black hole agent of embodiment of the present invention.
Embodiment
Like Fig. 1, the FPC shown in 2 fast criterion for through hole ability with black hole agent, be the method that a kind of qualitative filter paper filters, following steps are arranged successively:
(1) earlier middling speed qualitative filter paper 3 is attached in the funnel after moistening;
(2) middling speed qualitative filter paper 3 is placed on the conical flask 4 that the moistening volume of inwall is 250ml together with funnel 2;
(3) the 20ml black hole agent 5 that will from the black hole of FPC, sample filters through middling speed qualitative filter paper 3 along the straight rod of glass 1, is collected in the conical flask 4;
(4) with the timer record filtering time; Normal black hole agent 5 filtration times of through hole ability are in 28min; And observe filtrating volume 250ml conical flask 4 walls upwards diffusion arrive the conical flask neck time, the normal black hole agent 5 of through hole ability arrives the taper bottleneck times in 6.0min;
(5) with the straight rod 1 of glass black hole agent 5 is dipped in and drips on middling speed qualitative filter paper 3, observe after 30 seconds black hole agent 5 middling speed qualitative filter paper 3 to around the situation of dispersing, if sub-circular to around disperse and anhydrous on every side mark is irised out at present, show that the through hole ability is normal; If not to around disperse, be abnormity to around disperse or on a small quantity to around disperse and occur large stretch of water mark circle on every side, show that black hole agent 5 generations precipitate, its through hole ability descends unusually, with the through hole ability of synthetic determination black hole agent 5.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to the scope of patent protection that the present invention is confirmed by claims of being submitted to.
Claims (3)
1. the fast criterion for through hole ability of a black hole agent used for flexible printed circuit board is characterized in that:
Following steps are arranged successively:
(1) qualitative filter paper is attached in the funnel after moistening;
(2) qualitative filter paper is placed on the moistening conical flask of inwall together with funnel;
(3) black hole agent is filtered through qualitative filter paper along ganoid straight rod, and be collected in the conical flask;
(4), observe the rate of propagation that on the conical flask wall, makes progress of filtrating with the timer record filtering time;
(5) black hole agent dipped in drip on qualitative filter paper, behind setting-up time, observe black hole agent qualitative filter paper to around the situation of dispersing.
2. according to the fast criterion for through hole ability of the described black hole agent used for flexible printed circuit board of claim 1, it is characterized in that:
Said black hole agent is the black hole agent of from the black hole of flexible print circuit board, sampling.
3. according to the fast criterion for through hole ability of the described black hole agent used for flexible printed circuit board of claim 2, it is characterized in that:
Said ganoid straight rod is a directly rod of glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063413XA CN101173917B (en) | 2006-10-31 | 2006-10-31 | Fast criterion for through hole ability of black hole agent used for flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063413XA CN101173917B (en) | 2006-10-31 | 2006-10-31 | Fast criterion for through hole ability of black hole agent used for flexible printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101173917A CN101173917A (en) | 2008-05-07 |
| CN101173917B true CN101173917B (en) | 2012-03-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610063413XA Expired - Fee Related CN101173917B (en) | 2006-10-31 | 2006-10-31 | Fast criterion for through hole ability of black hole agent used for flexible printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101173917B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302124A (en) * | 2014-08-27 | 2015-01-21 | 无锡长辉机电科技有限公司 | Manufacturing technology of double-faced flexibility printed board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930890A (en) * | 1987-06-25 | 1990-06-05 | Hitachi Ltd. | Method and apparatus for detecting through-hole voids in multi-layer printed wiring board |
-
2006
- 2006-10-31 CN CN200610063413XA patent/CN101173917B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930890A (en) * | 1987-06-25 | 1990-06-05 | Hitachi Ltd. | Method and apparatus for detecting through-hole voids in multi-layer printed wiring board |
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| Publication number | Publication date |
|---|---|
| CN101173917A (en) | 2008-05-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SHENZHEN BYD ELECTRONIC COMPONENT Co.,Ltd. Assignor: BYD Co.,Ltd. Contract fulfillment period: 2008.4.25 to 2015.11.14 Contract record no.: 2008440000067 Denomination of invention: Fast criterion for through hole ability of black hole agent used for flexible printed circuit board License type: Exclusive license Record date: 20080504 |
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| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201123 Address after: 226600 Wangduo industrial concentration zone, Yazhou Town, Hai'an City, Nantong City, Jiangsu Province Patentee after: Jiangsu MeiFan Biotechnology Co.,Ltd. Address before: 518119 BYD Industrial Park, Yanan Road, Kwai Chung Town, Longgang District, Guangdong, Shenzhen Patentee before: BYD Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120328 Termination date: 20211031 |
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| CF01 | Termination of patent right due to non-payment of annual fee |