CN103088396A - Chemical water treatment method for PCB (printed circuit board) electro-coppering trough - Google Patents
Chemical water treatment method for PCB (printed circuit board) electro-coppering trough Download PDFInfo
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- CN103088396A CN103088396A CN2013100324203A CN201310032420A CN103088396A CN 103088396 A CN103088396 A CN 103088396A CN 2013100324203 A CN2013100324203 A CN 2013100324203A CN 201310032420 A CN201310032420 A CN 201310032420A CN 103088396 A CN103088396 A CN 103088396A
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- China
- Prior art keywords
- liquid medicine
- spareslots
- trough
- copper electroplating
- chemical water
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000126 substance Substances 0.000 title abstract 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052802 copper Inorganic materials 0.000 claims abstract description 47
- 239000010949 copper Substances 0.000 claims abstract description 47
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 239000003814 drug Substances 0.000 claims description 68
- 239000007788 liquid Substances 0.000 claims description 68
- 238000009713 electroplating Methods 0.000 claims description 42
- 238000002156 mixing Methods 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 238000003911 water pollution Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 229910000806 Latten Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001259 photo etching Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012633 leachable Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a chemical water treatment method for a PCB (printed circuit board) electro-coppering trough. The method comprises the following steps: (1) pumping chemical water in an electro-coppering trough into a spare trough through a filtering pump, wherein a heating device and a blower device are arranged outside the spare trough; (2) adding 3-5ml/l of industrial hydrogen peroxide with concentration of 50-70%, and starting the blower device; (3) starting the heating device, controlling the temperature in the spare trough at 65-70DEG C, lowering temperature to less than 40DEG C after two hours, adding active carbon powder to 4-5g/l, and stopping the blower device so as to stop air stirring; and (4) standing chemical water for 8-10 hours, and pumping the treated chemical water back to the electro-coppering trough to reuse through the filtering pump. The chemical water pollution degree in the copper trough is obviously reduced through the method disclosed by the invention while the cost is low, the chemical water can be reused, not only is the production quality guaranteed, but also the pressure of waste water treatment is reduced; and therefore, the energy conservation and environmental protection in the production process of the PCB are realized.
Description
Technical field
The present invention relates to the pcb board electroplating technology, be specifically related to a kind of PCB copper electroplating groove liquid medicine treatment process.
Background technology
In the pcb board manufacturing, shift in order to realize figure, most enterprises adopts the dry film operation to carry out figure and shifts, and adopts thereafter graphic plating to realize the line function of pcb board.Because the dry film in the dry film operation is macromolecule organic, long period of soaking is dissolving gradually in the electroplating liquid medicine of high acidity, thereby the content of the organic pollutant of liquid medicine in copper electroplating groove is constantly raise; And photo etching may produce a small amount of decomposition under the effect of electric current, further electroplating liquid medicine is polluted.Along with pollutent is more and more, the color of the liquid medicine in copper electroplating groove gradually becomes green by blueness, electroplate under this kind condition out copper layer ductility and tensile strength also worse and worse.And pcb board need to experience the high temperature more than 250 ℃ 1-3 time when welding, and the impact that pcb board is expanded with heat and contract with cold under this high temperature is obvious all the more, and the not good copper layer of quality may produce the danger of fracture, for the pcb board Quality Accident is buried serious hidden danger.For fear of described hidden danger of quality occurring, in existing pcb board production process, Some Enterprises adopts the method in contaminated conversion when serious of copper electroplating groove, but this method appreciates at starting material nowadays, labor cost rises and environmental protection pressure causes the PCB industry to enter the expensive epoch, will make PCB manufacturing concern back millstone around one's neck
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of PCB copper electroplating groove liquid medicine treatment process, the method can effectively solve electroplating liquid medicine pollutent too high problem of processing cost when too much, realization is in the situation that the cost lower cost obviously reduces copper groove liquid medicine dustiness, liquid medicine is reused, the production quality is effectively guaranteed, greatly reduce simultaneously the pressure of wastewater treatment, thereby realize the energy-conserving and environment-protective in the pcb board production process.
For solving the problems of the technologies described above, the present invention is achieved by the following technical programs:
A kind of PCB copper electroplating groove liquid medicine treatment process, its step is as follows:
(1) liquid medicine in copper electroplating groove is passed through filtration pump suction spareslots, described spareslots peripheral hardware heating unit and air-blast device;
(2) adding concentration is the industrial hydrogen peroxide 3-5ml/l of 50%-70%, and opens air-blast device;
(3) start heating unit, make the interior temperature of spareslots be controlled at 65-70 ℃, add activated carbon powder to 4-5g/l when reducing the temperature to below 40 ℃ after 2 hours, close air-blast device to stop pneumatic blending;
(4) reuse using after the standing 8-10 of liquid medicine hour liquid medicine after filtration pump will be processed to draw back in copper electroplating groove.
Preferably, in the filtration pump pump that adopts in step (1) and step (4), packing density is the filtration cotton core of 5 microns.
Preferably, the heating unit in step (1) comprises for controlling and is connected controller and the some heating tubes that are distributed in the spareslots surrounding that are connected with controller heat-up time with Heating temperature.
Preferably, the air-blast device in step (1) comprises the some air-inflating tubes that are distributed in the spareslots surrounding and the gas blower that is connected with air-inflating tube.
The present invention has following beneficial effect with respect to prior art:
(1) adopt industrial hydrogen peroxide in the present invention, concentration is 3-5ml/l, controlling its processing temperature by heating unit simultaneously is 65-70 ℃, under the strong oxidation and high temperature action of hydrogen peroxide, make high molecular organic contamination be decomposed to form the organism of molecular weight, facilitate activated carbon powder absorption, better guarantee the liquid medicine Disposal quality.
(2) add the amount of activated carbon powder enough to reach 4-5g/l in the present invention, to avoid causing absorb polluted matter fully because of the quantity not sufficient of activated carbon powder, affect adsorption effect; Simultaneously also avoid too much causing waste because activated carbon powder adds.The higher molecular motion of temperature speed, affect the absorption of activated carbon powder, and temperature is too low in addition, and molecular motion speed is crossed the absorption that also is unfavorable for slowly activated carbon powder, therefore control temperature below 40 ℃ to guarantee its absorption.
(3) made the standing 8-10 of liquid medicine hour can guarantee that activated carbon powder fully adsorbs in the present invention, at the bottom of simultaneously can guaranteeing that again activated carbon powder fully is deposited in spareslots, when avoiding the liquid medicine after processing is drawn back copper electroplating groove, carbon dust causes the obstruction of filtration pump, the production of the whole operation of impact.
(4) spareslots peripheral hardware of the present invention comprises for the heating unit of controlling the some heating tubes formations that are distributed in the spareslots surrounding of being connected controller heat-up time with Heating temperature and being connected with controller, a plurality of heating tubes of spareslots surrounding can guarantee effectively that in whole spareslots, liquid medicine can rise by Quick uniform, to satisfy its temperature needs.Simultaneously, the spareslots surrounding also is provided with some air-inflating tubes and connected gas blower, conveniently liquid medicine in groove is carried out pneumatic blending, can fully react.
(5) adopt in the present invention easily seek, cheap, a small amount of hydrogen peroxide and activated carbon powder can effectively complete cleaning and removal work to pollutent, treatment effect is very good, realize the quality guarantee of low-cost high repayment, so the method has good promotional value for Electroplating Production and the application of pcb board.
Embodiment
For the ease of those skilled in the art's understanding, the present invention is further described in detail below in conjunction with embodiment:
The invention provides a kind of PCB copper electroplating groove liquid medicine treatment process, comprise the following steps: (1) passes through filtration pump suction spareslots, described spareslots peripheral hardware heating unit and air-blast device with the liquid medicine in copper electroplating groove; (2) adding concentration is the industrial hydrogen peroxide 3-5ml/l of 50%-70%, and opens air-blast device; (3) start heating unit, make the interior temperature of spareslots be controlled at 65-70 ℃, add activated carbon powder to 4-5g/l when reducing the temperature to below 40 ℃ after 2 hours, close air-blast device to stop pneumatic blending; (4) liquid medicine after after the standing 8-10 of liquid medicine hour, the use filtration pump will be processed is drawn back in copper electroplating groove and is reused.
Before copper electroplating groove liquid medicine is processed, be ready to hold the spareslots of copper groove liquid medicine, and the spareslots peripheral hardware comprises for the heating unit of controlling the some heating tubes formations that are distributed in the spareslots surrounding of being connected controller heat-up time with Heating temperature and being connected with controller, a plurality of heating tubes of spareslots surrounding can guarantee effectively that in whole spareslots, liquid medicine can rise by Quick uniform, to satisfy its temperature needs.Simultaneously, the spareslots surrounding also is provided with some air-inflating tubes and connected gas blower, conveniently liquid medicine in groove is carried out pneumatic blending, can fully react.
Be incorporated as the industrial hydrogen peroxide of 3-5ml/l in treating processes, utilize the strong oxidizing property of hydrogen peroxide the photo etching resolvent in liquid medicine or the contour molecular organic pollutants of dry film leachable to be resolved into the organism of molecular weight, be beneficial to activated carbon powder and adsorb; In its process, the quantity not sufficient of hydrogen peroxide can cause Pollutant Treatment not exclusively and affects treatment effect, the amount of hydrogen peroxide easily remain at most in liquid medicine after processing and enter copper electroplating groove, easily the liquid medicine in copper electroplating groove is caused secondary pollution.And to control its processing temperature be 65-70 ℃, because the temperature of initial decomposition of hydrogen peroxide is spent more than 30, and in temperature is controlled 65-70 ℃ be the optimum temps of whole reaction, adopt this temperature can guarantee hydrogen peroxide fully and the reaction of the organic pollutant in liquid medicine, too high temperature can cause the too much time of needs when cooling, too low temperature easily makes the decomposition of hydrogen peroxide insufficient, can not effectively decompose the polymer pollutent in liquid medicine.Under the strong oxidation and high temperature action of hydrogen peroxide, make high molecular organic contamination be decomposed to form the organism of molecular weight, facilitate activated carbon powder absorption, better guarantee the liquid medicine Disposal quality.Add activated carbon powder to 4-5g/l when reducing the temperature to below 40 ℃ after 2 hours, to avoid causing absorb polluted matter fully because of the quantity not sufficient of activated carbon powder, affect adsorption effect; Simultaneously also avoid too much causing waste because activated carbon powder adds.Because temperature is lower, intermolecular pedesis is slower in addition, more is conducive to the absorption of activated carbon powder, therefore control temperature below 40 ℃ to guarantee its absorption.The operating method of the best is evenly to add in surrounding when adding hydrogen peroxide and activated carbon powder in spareslots, conveniently fully mixes fast with liquid medicine, strengthens treatment effect.Must guarantee in standing liquid medicine process its time of repose be 8-10 hour to guarantee that activated carbon powder fully adsorbs, at the bottom of simultaneously can guaranteeing that again activated carbon powder fully is deposited in spareslots, when avoiding the liquid medicine after processing is drawn back copper electroplating groove, carbon dust causes the obstruction of filtration pump, the production of the whole operation of impact.
Liquid medicine when dropping into spareslots or all draw back copper electroplating groove from spareslots, copper electroplating groove need to used the transition pump, in described filtration pump pump, packing density is the cotton core of 5 microns, adopts the larger cotton core of density can prevent effectively that carbon dust from entering copper electroplating groove when filtering.In use procedure, cotton core must correctly be installed, and is drawn back copper electroplating groove to prevent activated carbon powder from spareslots, causes secondary pollution; And only stop taking out liquid medicine during remaining a small amount of liquid medicine in spareslots, prevent that carbon dust from stopping up filtration pump.
The present invention is easy and simple to handle, and is workable, can effectively reduce production costs, and also can process simultaneously by a plurality of grooves in the situation that time and space are enough, can save a large amount of human and material resources and production cost.
Embodiment 1:
Liquid medicine in copper electroplating groove is passed through filtration pump suction spareslots; The industrial hydrogen peroxide 3ml/l that adds also opens air-blast device; And the startup heating unit, make the interior temperature of spareslots be controlled at 70 ℃, add activated carbon powder to 4.5g/l when reducing the temperature to 40 ℃ after 2 hours, close air-blast device to stop pneumatic blending; Liquid medicine after standing 8 hours liquid medicine be blue, when testing by copper groove Ha Shi sheet, whole Ha Shi sheet plate all presents the state of burning, the liquid medicine after the use filtration pump will be processed is drawn back in copper electroplating groove and is reused.
The concrete steps of using copper groove Ha Shi sheet to test are as follows: 1) get the liquid medicine 500ml after processing; 2) ((100mm*65mm) with 1000 purpose sand paper uniform grindings, washes clean with latten(-tin); 3) liquid medicine after first processing is poured the Ha Shi groove into, then puts into latten(-tin), connects rectifier, and anode connects the phosphor-copper piece, and negative electrode connects latten(-tin); 4) open rectifier, the adjustment electric current is 2A, regularly 5 minutes; 5) after the time arrives, shut electric current, the Ha Shi sheet is taken out, washing is clean; 6) washing dries up.
Annotate: the Kazakhstan coomb's test Coomb process of embodiment 2-6 is identical with embodiment 1.
Embodiment 2:
Liquid medicine in copper electroplating groove is passed through filtration pump suction spareslots; The industrial hydrogen peroxide 2ml/l that adds also opens air-blast device; And the startup heating unit, make the interior temperature of spareslots be controlled at 70 ℃, add activated carbon powder to 4.5g/l when reducing the temperature to 40 ℃ after 2 hours, close air-blast device to stop pneumatic blending; Liquid medicine is when after standing 8 hours, liquid medicine is tested by breathing out coomb's test Coomb, and a little burns high Current Zone, but all coating all have the fumulus shape, and solution is light green. and use liquid medicine after filtration pump will be processed to draw back in copper electroplating groove and reuse.
Embodiment 3:
By filtration pump suction spareslots, the industrial hydrogen peroxide 4ml/l that adds also opens air-blast device with the liquid medicine in copper electroplating groove; And the startup heating unit, make the interior temperature of spareslots be controlled at 65 ℃, add activated carbon powder to 4g/l when reducing the temperature to 35 ℃ after 2 hours, close air-blast device to stop pneumatic blending; Liquid medicine after standing 10 hours liquid medicine be blue, when testing by copper groove Ha Shi sheet, whole Ha Shi sheet plate all presents the state of burning, the liquid medicine after the use filtration pump will be processed is drawn back in copper electroplating groove and is reused.
Embodiment 4:
By filtration pump suction spareslots, the industrial hydrogen peroxide 5ml/l that adds also opens air-blast device with the liquid medicine in copper electroplating groove; And the startup heating unit, make the interior temperature of spareslots be controlled at 60 ℃, add activated carbon powder to 5g/l when reducing the temperature to 30 ℃ after 2 hours, close air-blast device to stop pneumatic blending; Liquid medicine after standing 9 hours liquid medicine be blue, when testing by copper groove Ha Shi sheet, whole Ha Shi sheet plate all presents the state of burning, the liquid medicine after the use filtration pump will be processed is drawn back in copper electroplating groove and is reused.
Embodiment 5:
By filtration pump suction spareslots, the industrial hydrogen peroxide 5ml/l that adds also opens air-blast device with the liquid medicine in copper electroplating groove; And the startup heating unit, make the interior temperature of spareslots be controlled at 45 ℃, add activated carbon powder to 5g/l when reducing the temperature to 30 ℃ after 2 hours, close air-blast device to stop pneumatic blending; Liquid medicine when after standing 9 hours, liquid medicine is tested by copper groove Ha Shi sheet high Current Zone burn band and increase, alleviate gradually to the low current district degree of burning, solution is light green, uses liquid medicine after filtration pump will be processed to draw back in copper electroplating groove and reuses.
The above embodiment has only expressed embodiments of the present invention; it describes comparatively concrete and detailed; but can not therefore be interpreted as the restriction to the scope of the claims of the present invention; as long as employing is equal to the technical scheme that the form of replacement or equivalent transformation obtains, within all should dropping on protection scope of the present invention.
Claims (4)
1. PCB copper electroplating groove liquid medicine treatment process is characterized in that: comprise that step is as follows:
(1) liquid medicine in copper electroplating groove is passed through filtration pump suction spareslots, described spareslots peripheral hardware heating unit and air-blast device;
(2) adding concentration is the industrial hydrogen peroxide 3-5ml/l of 50%-70%, and opens air-blast device;
(3) start heating unit, make the interior temperature of spareslots be controlled at 65-70 ℃, add activated carbon powder to 4-5g/l when reducing the temperature to below 40 ℃ after 2 hours, close air-blast device to stop pneumatic blending;
(4) reuse using after the standing 8-10 of liquid medicine hour liquid medicine after filtration pump will be processed to draw back in copper electroplating groove.
2. a kind of PCB copper electroplating groove liquid medicine treatment process according to claim 1 is characterized in that: in the filtration pump pump that adopts in step (1) and step (4), packing density is the filtration cotton core of 5 microns.
3. a kind of PCB copper electroplating groove liquid medicine treatment process according to claim 1 is characterized in that: the heating unit in step (1) comprises for controlling is connected controller and the some heating tubes that are distributed in the spareslots surrounding that are connected with controller heat-up time with Heating temperature.
4. a kind of PCB copper electroplating groove liquid medicine treatment process according to claim 1, it is characterized in that: the air-blast device in step (1) comprises the some air-inflating tubes that are distributed in the spareslots surrounding and the gas blower that is connected with air-inflating tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310032420.3A CN103088396B (en) | 2013-01-29 | 2013-01-29 | A kind of PCB copper electroplating groove liquid medicine treatment process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310032420.3A CN103088396B (en) | 2013-01-29 | 2013-01-29 | A kind of PCB copper electroplating groove liquid medicine treatment process |
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| CN103088396A true CN103088396A (en) | 2013-05-08 |
| CN103088396B CN103088396B (en) | 2015-10-28 |
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| CN103290462A (en) * | 2013-06-27 | 2013-09-11 | 昆山同心表面科技有限公司 | Automatic plating solution adding machine |
| CN104499037A (en) * | 2014-12-05 | 2015-04-08 | 李松 | Energy-saving and environmental-friendly electroplating chemical filtering and heating equipment |
| CN106087031A (en) * | 2016-08-09 | 2016-11-09 | 胜宏科技（惠州）股份有限公司 | A kind of organic method in removal electroplate liquid |
| CN107059105A (en) * | 2017-01-13 | 2017-08-18 | 昆山福烨电子有限公司 | A kind of PCB electroplating printed circuit boards carbon handling process |
| CN109183090A (en) * | 2018-11-16 | 2019-01-11 | 常德力元新材料有限责任公司 | A kind of processing method of acid bright tinning solution |
| CN109234786A (en) * | 2017-07-11 | 2019-01-18 | 上海新阳半导体材料股份有限公司 | A kind of online carbon electroplating treatment system and carbon processing method |
| CN109355692A (en) * | 2018-11-06 | 2019-02-19 | 珠海菁晟伟泰科技有限公司 | A kind of filter method of electroplate liquid |
| CN114921819A (en) * | 2022-05-10 | 2022-08-19 | 广州市慧科高新材料科技有限公司 | Method for improving stability of hole-filling copper plating solution by using phosphorus-copper anode |
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| CN109355692A (en) * | 2018-11-06 | 2019-02-19 | 珠海菁晟伟泰科技有限公司 | A kind of filter method of electroplate liquid |
| CN109183090A (en) * | 2018-11-16 | 2019-01-11 | 常德力元新材料有限责任公司 | A kind of processing method of acid bright tinning solution |
| CN114921819A (en) * | 2022-05-10 | 2022-08-19 | 广州市慧科高新材料科技有限公司 | Method for improving stability of hole-filling copper plating solution by using phosphorus-copper anode |
| CN114921819B (en) * | 2022-05-10 | 2023-08-29 | 广州市慧科高新材料科技有限公司 | Method for improving stability of hole-filling copper plating solution of phosphorus copper anode |
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| CN103088396B (en) | 2015-10-28 |
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