CN102677037A - Immersion tin after-treatment solution composition - Google Patents
Immersion tin after-treatment solution composition Download PDFInfo
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- CN102677037A CN102677037A CN2012101668497A CN201210166849A CN102677037A CN 102677037 A CN102677037 A CN 102677037A CN 2012101668497 A CN2012101668497 A CN 2012101668497A CN 201210166849 A CN201210166849 A CN 201210166849A CN 102677037 A CN102677037 A CN 102677037A
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Abstract
The invention discloses an immersion tin after-treatment solution composition which is composed of organic acid or inorganic acid or mixture thereof, organic chelant and water solution of surfactant. The problem of yellowing of electroless tin coatings during tin immersion and storage is solved by the immersion tin after-treatment solution composition, welding reliability of subsequent surface assembly of electronic components is guaranteed and product quality is improved effectively.
Description
Technical field
The present invention relates to a kind of printed circuit board surface and handle the material of usefulness, belong to the printed-board technology field, particularly relate to a kind of chemical tin post-treatment solution compsn.
Background technology
Tin is very good metal of a kind of weldability, and anti-corrosion capability is preferably arranged, and therefore in electronic industry, is widely used.Such as in the production technique of the printed circuit board (PCB) of use for electronic products; A kind of mode be adopt hot air leveling technology (the slicker solder coating of tradition " spray tin " process using because lead and compound thereof be the hazardous and noxious substances of harm humans health and contaminate environment and day by day eliminated by industry); Spraying one deck tin layer has good characteristics such as weldability as scolder to guarantee PCB electronic devices and components in follow-up SMT (assembling) process on the PCB surface of making; A kind of in addition mode commonly used is the Technology of the heavy tin of the chemistry that gets up of development in recent years; Through chemical replacement reaction produce a layer thickness evenly, the pure tin coating of surfacing; Convenient follow-up electronical elements surface attachment process; Because this technology is good than the thickness evenness of hot air leveling coating; And do not have bad problems such as scolder bridging, plug-hole, and being particularly suitable for the surface treatment that industry technology develops to high-density, high precision, fine rule road, closely spaced printed circuit board direction, the heavy tin of chemistry has very large development potentiality.
But the heavy tin of chemistry also faces various technical problems as process of surface treatment.Such as, the chemical tin coating forms the whisker crystal of " whisker " easily, and these whiskers can cause the problem of " micro-short circuit "; Some patents propose solution to this problem both at home and abroad; For example among the Chinese patent CN1387465 " method of copper or copper alloy electroless plating tin "; Adopt methylsulfonic acid and pink salt, complexing agent and be no less than a kind of added metal constitutional chemistry tin plating electrolyte, overcome zinc-plated coating and produce " whisker " problem.
In addition; The chemical tin coating before element assembling, also occur easily the jaundice of tin face and and then the problem that welding property reduces appears, particularly be accomplished to time of electronic devices and components assembling long time the, even more serious when storage condition is slightly offset from chemical tin technology; Especially bad, when chemical tin wears out (copper ion concentration is higher in the solution), even just accomplished the phenomenon of its coating of technology of chemical tin with regard to the appearance jaundice.
Summary of the invention
In order to overcome the above-mentioned shortcoming that existing technology exists; The present invention provides a kind of chemical tin post-treatment solution; Solve the chemical plating stannum coating in the problem of accomplishing chemical tin technology and turning to be yellow, guarantee the soldering reliability that follow-up electronic devices and components are surface-mounted, effectively promoted quality product at memory period.
The technical scheme that problem adopted of solution chemical tin provided by the invention surface jaundice is: a kind of chemical tin post-treatment solution comprises: a kind of organic acid or mineral acid, the perhaps mixing acid of two kinds of acid, the aqueous solution of organic sequestering agent and tensio-active agent.
Furthermore, in the said liquid composite, contain organic acid and/or the mineral acid of 0.2 ~ 5g/l; 0.05 the organic sequestering agent of ~ 0.5g/l; 0.0005 the tensio-active agent of ~ 0.5g/l.
Organic acid wherein comprises in Hydrocerol A, oxysuccinic acid, glucono-, oxyacetic acid, the tosic acid any or the two above mixture.
Mineral acid wherein comprises sulfuric acid, phosphoric acid or the mixture of the two.
Organic sequestering agent wherein includes machine phosphonic acid and salt thereof; Can be sodium ethylenediamine tetramethylenephosphonate, hydroxy ethylene diphosphonic acid, ATMP.
Wherein tensio-active agent comprises among the PEG 400 to PEG1500 any or the mixture more than the two.
By technique scheme, advantage and beneficial effect that chemical tin post-treatment solution compsn of the present invention has are:
The present invention increases post-treatment solution matting of the present invention behind the traditional chemical process of tin, can effectively alleviate, prevent the problem of chemical tin tin face jaundice.The present invention can guarantee the soldering reliability that follow-up electronic devices and components are surface-mounted, has effectively promoted quality product.
Embodiment
A kind of chemical tin post-treatment solution of the present invention has comprised a kind of organic acid or mineral acid, the perhaps mixing acid of two kinds of acid, the aqueous solution of organic sequestering agent and tensio-active agent.
Said organic acid comprises Hydrocerol A, oxysuccinic acid, glucono-, oxyacetic acid, tosic acid; Said mineral acid comprises sulfuric acid, phosphoric acid; Said organic sequestering agent includes machine phosphonic acid and salt thereof; Can be sodium ethylenediamine tetramethylenephosphonate, hydroxy ethylene diphosphonic acid, ATMP; Said tensio-active agent comprises among the PEG 400 to PEG 1500 any or the mixing more than the two.
The compound method of chemical tin post-treatment solution of the present invention is: at room temperature, in 1 premium on currency, add 0.2-5 gram mineral acid, organic acid or mixing acid, 0.05-0.5 restrains organic sequestering agent, 0.0005 to 0.5 gram tensio-active agent.
Chemical tin post-treatment solution of the present invention, its method of use comprise traditional chemical process of tin step:
1, acid clean, fully washing then;
2, little erosion coarse surface, and fully washing;
3, preplating tin is handled;
4, chemical tin is handled, fully washing;
5, chemical tin post-treatment solution, fully washing;
6, drying.
Be concrete effect experimental example below:
1, get the anti-welding operation of completion and treat four of last surface-treated circuit cards, size 5cm X 10cm, (SkyPosit Sn950 technology, the sky, Guangzhou holds chemical ltd in technical process through chemical tin.The chemical tin SkyPosit Sn950 solution of new preparation); Four all evenly pure white, nothing jaundice of circuit card tin face; Will be wherein three (being labeled as A, B, C respectively) clean through post-treatment solution of the present invention, concrete aftertreatment cleaning condition such as subordinate list one, these three circuit cards and an other circuit card (being labeled as D) that does not clean through post-treatment solution are all under constant temperature (45 ℃) constant humidity (85%) condition then; Place to take out after three months and observe, the result sees attached list two.
2, get the anti-welding operation of completion in addition and treat two of last surface-treated circuit cards, size 5cm X 10cm, (SkyPosit Sn950 technology, the sky, Guangzhou holds chemical ltd in technical process through chemical tin.Production line is aged chemical tin SkyPosit Sn950 solution; Copper ion concentration 7.8g/l in the chemical tin solution); All there is slight jaundice on two circuit cards (mark is respectively E, F) chemical tin surface; Wherein a circuit card that is labeled as E cleans (concrete aftertreatment cleaning condition such as subordinate list one) through post-treatment solution of the present invention, and tin surfaces is evenly pure white, does not have the jaundice phenomenon.
Table one: post-treatment solution preparation and clean condition
These two circuit cards (E and F) all under constant temperature (45C) constant humidity (85%) condition, are placed to take out after three months and are observed, and the result sees attached list two.
Table two yellowing phenomenon result
* the circuit card of mark D and F does not clean through the chemical tin post-treatment solution.
Clearly show from above-mentioned test result, behind the traditional chemical process of tin, increase post-treatment solution matting of the present invention, can effectively alleviate, prevent the problem of chemical tin tin face jaundice.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Former every technical scheme content of the present invention that do not break away from, all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (10)
1. a chemical tin post-treatment solution compsn is characterized in that: contain organic acid and/or mineral acid, organic sequestering agent and tensio-active agent in the said liquid composite.
2. chemical tin post-treatment solution compsn according to claim 1 is characterized in that: in the said liquid composite, contain organic acid and/or the mineral acid of 0.2 ~ 5g/l; 0.05 the organic sequestering agent of ~ 0.5g/l; 0.0005 the tensio-active agent of ~ 0.5g/l.
3. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: said organic acid comprises in Hydrocerol A, oxysuccinic acid, glucono-, oxyacetic acid, the tosic acid any or the two above mixture.
4. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: said mineral acid comprises sulfuric acid, phosphoric acid or the mixture of the two.
5. chemical tin post-treatment solution compsn according to claim 2, it is characterized in that: said organic sequestering agent includes machine phosphonic acid and salt thereof; Can be sodium ethylenediamine tetramethylenephosphonate, hydroxy ethylene diphosphonic acid, ATMP.
6. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: said tensio-active agent comprises among the PEG 400 to PEG1500 any or the mixture more than the two.
7. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: in the said liquid composite, contain the oxyacetic acid of 1.2g/l; 0.1g/l sulfuric acid; 0.5g/l hydroxy ethylene diphosphonic acid; 0.05g/l PEG6000.
8. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: in the said liquid composite, contain the phosphoric acid of 1.0g/l; 2.0g/l hydroxy ethylene diphosphonic acid; 0.2g/l PEG 1000.
9. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: in the said liquid composite, contain the oxysuccinic acid of 0.3g/l; 2.1g/l tosic acid; 0.8g/l ATMP; 0.05g/l PEG400.
10. chemical tin post-treatment solution compsn according to claim 2 is characterized in that: in the said liquid composite, contain the Hydrocerol A of 4g/l; 0.1g/l sodium ethylenediamine tetramethylenephosphonate; 0.01g/l PEG 1500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210166849 CN102677037B (en) | 2012-05-25 | 2012-05-25 | Immersion tin after-treatment solution composition |
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| CN 201210166849 CN102677037B (en) | 2012-05-25 | 2012-05-25 | Immersion tin after-treatment solution composition |
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| CN102677037A true CN102677037A (en) | 2012-09-19 |
| CN102677037B CN102677037B (en) | 2013-09-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365986A (en) * | 2017-07-11 | 2017-11-21 | 东莞市富默克化工有限公司 | A kind of tin plating technique of chemical tin inorganic agent and application the chemical tin inorganic agent |
| CN108505080A (en) * | 2018-04-13 | 2018-09-07 | 德庆县瑞晶电子材料有限公司 | A kind of DRH-30 compounds for tin-plated product surface post-processing function |
| CN110093598A (en) * | 2019-05-18 | 2019-08-06 | 深圳市创智成功科技有限公司 | For protecting the tin face protective agent of chemical tin coating |
| CN112251757A (en) * | 2020-09-15 | 2021-01-22 | 深圳市崇辉表面技术开发有限公司 | Protective water and preparation method thereof |
| CN112501665A (en) * | 2020-11-30 | 2021-03-16 | 南通麦特隆新材料科技有限公司 | Protective agent after electrotinning and preparation method thereof |
| CN113249034A (en) * | 2021-05-10 | 2021-08-13 | 广东风华高新科技股份有限公司 | Film covering agent and application thereof |
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| US20050026991A1 (en) * | 2003-07-31 | 2005-02-03 | Cholody Wieslaw M. | Derivatives of 3-hydroxy-pyrrole-2,4-dicarboxylic acid and uses thereof |
| JP2007056286A (en) * | 2005-08-22 | 2007-03-08 | Rohm & Haas Electronic Materials Llc | Aqueous solution for treating metal surface and method for preventing metal surface from discoloring |
| CN101713089A (en) * | 2008-09-22 | 2010-05-26 | 罗门哈斯电子材料有限公司 | Metal surface treatment aqueous solution and method for inhibiting whiskers on a metal surface |
| CN102282294A (en) * | 2009-01-14 | 2011-12-14 | 安美特德国有限公司 | Solution and process for increasing the solderability and corrosion resistance of a metal or metal alloy surface |
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2012
- 2012-05-25 CN CN 201210166849 patent/CN102677037B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050026991A1 (en) * | 2003-07-31 | 2005-02-03 | Cholody Wieslaw M. | Derivatives of 3-hydroxy-pyrrole-2,4-dicarboxylic acid and uses thereof |
| JP2007056286A (en) * | 2005-08-22 | 2007-03-08 | Rohm & Haas Electronic Materials Llc | Aqueous solution for treating metal surface and method for preventing metal surface from discoloring |
| CN101713089A (en) * | 2008-09-22 | 2010-05-26 | 罗门哈斯电子材料有限公司 | Metal surface treatment aqueous solution and method for inhibiting whiskers on a metal surface |
| CN102282294A (en) * | 2009-01-14 | 2011-12-14 | 安美特德国有限公司 | Solution and process for increasing the solderability and corrosion resistance of a metal or metal alloy surface |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365986A (en) * | 2017-07-11 | 2017-11-21 | 东莞市富默克化工有限公司 | A kind of tin plating technique of chemical tin inorganic agent and application the chemical tin inorganic agent |
| CN108505080A (en) * | 2018-04-13 | 2018-09-07 | 德庆县瑞晶电子材料有限公司 | A kind of DRH-30 compounds for tin-plated product surface post-processing function |
| CN110093598A (en) * | 2019-05-18 | 2019-08-06 | 深圳市创智成功科技有限公司 | For protecting the tin face protective agent of chemical tin coating |
| CN112251757A (en) * | 2020-09-15 | 2021-01-22 | 深圳市崇辉表面技术开发有限公司 | Protective water and preparation method thereof |
| CN112501665A (en) * | 2020-11-30 | 2021-03-16 | 南通麦特隆新材料科技有限公司 | Protective agent after electrotinning and preparation method thereof |
| CN113249034A (en) * | 2021-05-10 | 2021-08-13 | 广东风华高新科技股份有限公司 | Film covering agent and application thereof |
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| Publication number | Publication date |
|---|---|
| CN102677037B (en) | 2013-09-11 |
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Address after: 510990 8 Taiyuan Road, Conghua Economic Development Zone, Conghua, Guangzhou, Guangdong Patentee after: Guangdong Tiancheng Technology Co., Ltd. Address before: 510990 8 Taiyuan Road, Conghua Economic Development Zone, Conghua, Guangzhou, Guangdong Patentee before: Guangzhou Skychem Limited |
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Address after: 510990 8 Taiyuan Road, Conghua Economic Development Zone, Conghua, Guangzhou, Guangdong Patentee after: Guangdong Tiancheng Technology Co.,Ltd. Address before: 510990 8 Taiyuan Road, Conghua Economic Development Zone, Conghua, Guangzhou, Guangdong Patentee before: GUANGZHOU SKYCHEM TECHNOLOGIES Ltd. |