CN103874336B - Carbon oil printing process for circuit board - Google Patents
Carbon oil printing process for circuit board Download PDFInfo
- Publication number
- CN103874336B CN103874336B CN201410069237.5A CN201410069237A CN103874336B CN 103874336 B CN103874336 B CN 103874336B CN 201410069237 A CN201410069237 A CN 201410069237A CN 103874336 B CN103874336 B CN 103874336B
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- carbon oil
- wiring board
- web plate
- thickness
- silk screen
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Abstract
The invention discloses a carbon oil printing process for a circuit board. The process comprises the following steps of 1, cleaning the board surface of the circuit board; 2, pasting a water film; 3, coating photosensitive glue; 4, exposing; 5, developing; 6, drying. The board surface of the circuit board is coated with a layer of water film with the thickness of 35 [mu]m, and the photosensitive glue is coated on the obverse side and the reverse side before a screen printing plate is exposed, so that the screen printing plate is more uniform and neater, and in addition, the thickness of the screen printing plate is increased, so that the screen printing plate is more stable in shape during printing and is not easy to deform, and the reliability is improved; the printing thickness of carbon oil is increased, so that the problems of short circuit and open circuit at places with high use frequency can be effectively prevented; the thickness of the water film is adjusted from the original 25 [mu]m to 35 [mu]m, and the thickness of the film is increased, so that carbon oil is prevented from being diffused and leaked, the manufacturing yield of the carbon oil is effectively improved, the quality of a PCB (printed circuit board) is improved, the appearance of the board surface is more attractive, scrap of circuit boards is reduced, and the manufacturing cost of the carbon oil is reduced.
Description
Technical field
The present invention relates to wiring board manufacturing technology field, and in particular to a kind of wiring board carbon oil typography.
Background technology
With developing rapidly for electronics industry, carbon oil printed board tends to multifunction and miniaturization in common electric, instrument
Aspect and be progressively used, such as：Television set, telephone set, electronic organ, game machine, video recorder etc., its new technology, new function
It is continuously available and develops and utilize, microcomputer, miniature radio cassette player, the electronic applications of electronic measuring device and SMT also begins to select
At the positions such as carbon-film PCB, such as button in the printed circuit of the PCB surface of electronic apparatus, contact conducting is generally required
But be not integrally fixed at together.During carbon oil board production, existing technology mode is photosensitive oil directly after hardening
Silk-screen carbon oil on ink, because photosensitive-ink mobility is in uneven thickness by force, easily produces minute crack after solidification, carbon oil passes through this
A little cracks are penetrated on the circuit below photosensitive-ink, so as to cause micro-short circuit to scrap.Simultaneously carbon oil is used as semiconductor, Duo Shuoying
Used in low voltage product by key mapping, because its position usage frequency is high, easily there is the problem of short circuit and open circuit.
The content of the invention
In view of this, the technical problem to be solved in the present invention is a kind of anti-carbon oil careless mistake and improves the wiring board carbon of yields
Oily typography.
In order to solve above-mentioned technical problem, the present invention is realized using following scheme：A kind of wiring board carbon oil typography, bag
Include following steps：
1）Wiring board plate face is cleared up；
2）The agio film；
3）Apply photosensitive slurry；
4）Exposure；
5）Development；
6）Drying；
Its step 2）Comprise the following steps that：By silk screen inclination, 45 ° DEG C are placed on coating frame, are squirted on silk screen with watering can,
Then silk screen moisture is scraped uniformly with scraper；Then the printing surface 35um water film uniformly, being symmetrically affixed on silk screen；Post
Sprayed water to ink surface with watering can afterwards；Equably lightly in printing surface hydraulic pressure is gone out with scraper again；Again with scraper to ink surface
The excessive moisture of extrusion is lightly scraped, then the excessive moisture in screen frame is blotted with dust suction cloth, be finally placed on web plate
Temperature control be 45 DEG C ± 5 DEG C under conditions of toast 10-15min.
Wherein, step 1）Described in wiring board adopt 68T web plates.
Wherein, step 3）Described in photosensitive slurry be at the uniform velocity uniformly coated on silk screen positive and negative, speeds control is in 10-
12cm/min, spatula Angle ambiguity is at 30 ° -75 °；Web plate is put in web plate baking box is again dried；It is coated with again again afterwards, repeats to apply
Cloth 2-3 time.
Wherein, it is 45 DEG C ± 5 DEG C that the baking condition of described web plate baking box is controlled in temperature, and the time is 10-15min.
Wherein, step 4）Described in conditions of exposure be to be carried out using the Exposing Lamp of 3KW, the time for exposure control in 200s-
300s。
Compared with prior art, the plate face of assist side of the present invention applies one layer of 35um water film positive and negative before half tone exposure
It is coated with photosensitive slurry again, web plate evenly, neatly, and can increased the thickness of web plate, make web plate shape in printing more steady
Determine and be unlikely to deform, improve reliability；Carbon oil print thickness is increased, can effectively prevent short at the high position of usage frequency
Road and the problem of open circuit；And the thickness of the water film is adjusted to 35um from original 25um, film thickness increases, and can prevent carbon oil
Diffusion so that carbon oil will not seepage, effectively improve carbon oil and make yields, improve the quality of PCB classes so that the outward appearance of plate face is more
Plus it is attractive in appearance, scrapping for wiring board is reduced, reduce carbon oil cost of manufacture.
Specific embodiment
In order to allow those skilled in the art to more fully understand technical scheme, with reference to embodiment to this
It is bright to be further elaborated.
Embodiment：A kind of wiring board carbon oil typography, the technique main flow is comprised the following steps：
1）Wiring board plate face is cleared up.PCB surface cleaning i.e. mistakeization gold pre-treatment, mainly cleans wiring board plate face
Rubbish and foreign matter（Copper face oxidation, grease or dust）, it is ensured that plate face is before silk-screen without any foreign matter and pollution.Choose first clean
Only, intact 68T web plates；Then web plate is rinsed with giant, in order to preferably rinse web plate, giant rinses web plate
Distance controlling in 0.6-1.0m；By the web plate non-dust cloth for having rinsed by the globule wiped clean in just face, then it is placed in baking box baking
Dry, at 45 DEG C ± 5 DEG C, baking time is controlled in 15-20min the temperature control of oven cooking cycle；Take out the dry web plate of baking positive and negative
Cleaned with binding dust roller in face, it is ensured that web plate is totally dustless.
2）The agio film.By silk screen inclination, 45 ° are placed on coating frame, are squirted on silk screen with watering can, then with scraper silk
Net moisture is scraped uniformly；Then the printing surface 35um water film uniformly, being symmetrically affixed on silk screen；I.e. with watering can to oil after posting
Black face water spray；Equably lightly in printing surface hydraulic pressure is gone out with scraper again；Again with scraper to ink surface the superfluous water extruded
Part lightly scrapes, then the excessive moisture in screen frame is blotted with dust suction cloth, finally web plate is placed on into temperature control for 45 DEG C
Baking 10-15min is carried out under conditions of ± 5 DEG C.
3）Apply photosensitive slurry.Photosensitive slurry is at the uniform velocity uniformly coated on silk screen positive and negative, speeds control in 10-12cm/min,
Spatula Angle ambiguity is at 30 ° -75 ° so that every time the thickness of coating can reach 3um；After being painted with for the first time web plate is put into again
Dry in web plate baking box, it is 45 DEG C ± 5 DEG C that web plate is controlled in temperature in the baking condition of web plate baking box, and the time is 10-15min；
It is coated with again again after drying for the first time, repetition is coated 2-3 time to web plate.
4）Exposure.The egative film film is attached to into the film sieve bottom central authorities of first-class slurry, medicine film is corrected a wrongly written character or a misspelt word and faces net, then web plate is put
Put in the glass centre position of exposure machine, wireway is put in screen frame, depress cover plate, open vavuum pump, condition is set；Exposure
Condition is to be carried out using the Exposing Lamp of 3KW, and the time for exposure is controlled in 200s-300s.
5）Development.The web plate for having exposed stands and develop after 3-5min, then web plate is soaked into dissolving with clear water；High pressure is used again
Hydraulic giant is rinsed, until unexposed part is all rinsed well, hydraulic giant off-network plate distance about 0.8-1.0m.Rushing movie queen will with towel
Surrounding moisture is gently wiped clean, and is put into baking box, it is to avoid have the globule to flow in figure, causes development unnet.
6）Drying.After development surrounding moisture is gently wiped clean with non-dust cloth, be put into oven cooking cycle, the temperature control of baking
To carry out baking 20-25min under conditions of 45 DEG C ± 5 DEG C.
7）Wiring board after drying carries out quality testing, it is qualified after carry out carbon oil printing.During printing, by the half tone made
After the registration holes accurate contraposition of wiring board to be printed, wiring board is placed on character printer, it is automatically complete by craft or machine
Into carbon oil printing.Dried after printing.
The wherein specific implementation of above-described embodiment only present invention, its description is more concrete and detailed, but can not
Therefore it is interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, some deformations and improvement can also be made, these obvious alternative forms are equal
Belong to protection scope of the present invention.
Claims (4)
1. a kind of wiring board carbon oil typography, it is characterised in that comprise the following steps：
1）Wiring board plate face is cleared up；
2）The agio film；
3）Apply photosensitive slurry；
4）Exposure；
5）Development；
6）Drying；
Wherein step 2）Comprise the following steps that：By silk screen inclination, 45 ° are placed on coating frame, are squirted on silk screen with watering can, then
Silk screen moisture is scraped uniformly with scraper；Then the printing surface 35um water film uniformly, being symmetrically affixed on silk screen；After posting i.e.
Sprayed water to ink surface with watering can；Equably lightly in printing surface hydraulic pressure is gone out with scraper again；Again with scraper to ink surface crowded
The excessive moisture for going out lightly is scraped, then the excessive moisture in screen frame is blotted with dust suction cloth, finally web plate is placed on into temperature
10-15min is toasted under conditions of being controlled to 45 DEG C ± 5 DEG C；
Step 3）Described in photosensitive slurry be at the uniform velocity uniformly coated on silk screen positive and negative, speeds control is scraped in 10-12cm/min
Spoon Angle ambiguity is at 30 ° -75 °；Web plate is put in web plate baking box is again dried；It is coated with again again afterwards, repeats coating 2-3 time.
2. wiring board carbon oil typography according to claim 1, it is characterised in that step 1）Described in wiring board adopt
Use 68T web plates.
3. wiring board carbon oil typography according to claim 1, it is characterised in that the baking bar of described web plate baking box
It is 45 DEG C ± 5 DEG C that part is controlled in temperature, and the time is 10-15min.
4. wiring board carbon oil typography according to claim 1, it is characterised in that step 4）Described in conditions of exposure
It is to be carried out using the Exposing Lamp of 3KW, the time for exposure is controlled in 200s-300s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069237.5A CN103874336B (en) | 2014-02-28 | 2014-02-28 | Carbon oil printing process for circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069237.5A CN103874336B (en) | 2014-02-28 | 2014-02-28 | Carbon oil printing process for circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103874336A CN103874336A (en) | 2014-06-18 |
| CN103874336B true CN103874336B (en) | 2017-04-12 |
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ID=50912351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410069237.5A Expired - Fee Related CN103874336B (en) | 2014-02-28 | 2014-02-28 | Carbon oil printing process for circuit board |
Country Status (1)
| Country | Link |
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| CN (1) | CN103874336B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211617A (en) * | 2016-08-24 | 2016-12-07 | 奥士康精密电路（惠州）有限公司 | Large scale catch point net manufacture method |
| CN107493662B (en) * | 2017-08-11 | 2020-09-25 | 珠海精毅电路有限公司 | Method for manufacturing carbon oil with low resistance value and thickness of more than or equal to 25um on printed circuit board |
| CN107613658A (en) * | 2017-08-31 | 2018-01-19 | 惠东县建祥电子科技有限公司 | A kind of method of reduction PCB carbon oil plate resistances |
| CN107672285A (en) * | 2017-09-04 | 2018-02-09 | 沃苏特电子科技（苏州）有限公司 | A kind of secondary coating process of silk screen |
| CN107825823A (en) * | 2017-11-13 | 2018-03-23 | 胜华电子（惠阳）有限公司 | Super thick carbon oil printing specific complex half tone and preparation method thereof |
| CN108107682A (en) * | 2017-11-16 | 2018-06-01 | 东莞市晶博光电有限公司 | A kind of positive and negative exposure oil-leakage-prevention halftone and its manufacture craft and typography |
| CN109413881B (en) * | 2018-11-22 | 2021-10-22 | 奥士康科技股份有限公司 | Manufacturing method of carbon oil circuit board and solder-mask windowing |
| CN109548307B (en) * | 2018-12-21 | 2021-07-02 | 遂宁市广天电子有限公司 | Carbon oil plate and preparation method thereof |
| CN110430690B (en) * | 2019-07-31 | 2022-04-22 | 高德（无锡）电子有限公司 | Process for meeting minimum peelable glue thickness of PCB |
| CN111025851A (en) * | 2019-12-24 | 2020-04-17 | 杭州质感科技有限公司 | Process method for coating photosensitive adhesive on silk screen outer frame |
| CN112004329B (en) * | 2020-08-31 | 2024-03-08 | 广州源康精密电子股份有限公司 | Processing method for avoiding false copper exposure of circuit board |
| CN113923880B (en) * | 2021-09-27 | 2023-01-10 | 深圳市景旺电子股份有限公司 | Circuit board printing method and circuit board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490449A (en) * | 2011-12-14 | 2012-06-13 | 景旺电子（深圳）有限公司 | Method for plugging holes based on stainless steel mesh plate, stainless steel mesh plate and manufacturing method thereof |
-
2014
- 2014-02-28 CN CN201410069237.5A patent/CN103874336B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490449A (en) * | 2011-12-14 | 2012-06-13 | 景旺电子（深圳）有限公司 | Method for plugging holes based on stainless steel mesh plate, stainless steel mesh plate and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 新型丝网制版感光材料;刘顺林;《印刷技术》;20011130(第32期) * |
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| CN103874336A (en) | 2014-06-18 |
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