CN115401364B - High-activity water-washing scaling powder and preparation process thereof - Google Patents

High-activity water-washing scaling powder and preparation process thereof Download PDF

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Publication number
CN115401364B
CN115401364B CN202111226367.1A CN202111226367A CN115401364B CN 115401364 B CN115401364 B CN 115401364B CN 202111226367 A CN202111226367 A CN 202111226367A CN 115401364 B CN115401364 B CN 115401364B
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acid
flux
water
soldering flux
activity water
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CN115401364A (en
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吴泽彪
吴坚
靳涛
朱尊雷
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SHANGHAI HUAQING WELDING MATERIAL TECHNOLOGY CO LTD
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SHANGHAI HUAQING WELDING MATERIAL TECHNOLOGY CO LTD
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/362Selection of compositions of fluxes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3612Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents

Abstract

The invention relates to B23K, in particular to a high-activity water-washing scaling powder and a preparation process thereof. The soldering flux is prepared from the following raw materials in percentage by weight: 8-15 wt% of active agent, 7-12 wt% of thickener and the balance of solvent. The flux provided by the invention can promote the welding activity and improve the water washability by selecting the polycarboxylic active agent and adding the solvent containing the rosin derivative to adjust the viscosity and the dispersion compatibility during welding. By adding the thickener with both activity and washability, the activity in the low-temperature reflow process can be further improved, the cleaning of residual soldering flux with poor water solubility such as rosin derivatives and the like is promoted, and the residual soldering flux can be quickly and completely cleaned under the action of pure water. The soldering flux provided by the invention has high welding reliability, is environment-friendly, has no pollution, has high weldability to various base materials, avoids melting solder into balls, and has neat and bright welding spots and firm adhesion.

Description

High-activity water-washing scaling powder and preparation process thereof
Technical Field
The invention relates to B23K, in particular to a high-activity water-washing scaling powder and a preparation process thereof.
Background
The soldering flux is an auxiliary agent for removing metal oxide on the surface of a bonding pad in a welding process and promoting welding, and after the welding is finished, residual soldering flux such as water cleaning type soldering flux and the like needs to be removed through an oil-based or water-based cleaning agent, and the problems that the residual soldering flux is more after welding due to the fact that the water cleaning type soldering flux comprises resin with high content such as rosin and the like exist.
CN109676284a discloses a soldering paste and a method for manufacturing the same. The paste formulation comprises: 8-15% of rosin, a solvent, a thixotropic agent, organic acid, a surfactant and organic amine, and has the advantages of low reflux temperature, less flux paste residues, strong activity, low corrosion and capability of effectively improving the reliability of chip packaging.
The soldering paste has the advantages that the soldering paste adopts low rosin content, so that most of the soldering paste is volatilized in the reflow process, the amount of residues is reduced, the residues are difficult to clean rapidly by using water, and the current soldering paste is difficult to promote the formation of neat and smooth welding spots.
Disclosure of Invention
In order to solve the above problems, the first aspect of the present invention provides a high-activity water-washed flux, which is prepared from the following raw materials in percentage by weight: 8-15 wt% of active agent, 7-12 wt% of thickener and the balance of solvent.
In the welding process, the surface of a base material such as Cu, ni, au, pb is provided with an oxide layer to influence the formation and wetting of welding spots, so that an active agent is needed to remove the oxide layer to improve the welding activity, and the inventor finds that when a chain acid with a proper carboxyl number is added, the welding activity can be promoted, the wettability of a melt in the welding process can be promoted, but when the adhesive is used for low-temperature welding, the effect of the chain carboxylic acid is softer and the activity is poorer. In one embodiment, the active agent comprises a chain acid having a number of carboxyl groups ranging from 2 to 5. Preferably, the weight ratio of the chain acid having 2 to 3 carboxyl groups to the chain acid having 4 to 5 carboxyl groups is (2 to 6): 1. the chain acid has 10 or less carbon atoms. Examples of chain acids include, but are not limited to, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, pimelic acid, citric acid, tricarballylic acid, N-hydroxyethyl ethylamine triacetic acid, ethylenediamine tetraacetic acid, diethylenetriamine pentaacetic acid.
The inventor finds that when the thickening agent is obtained by adding acid with a certain carboxyl number and the nitrogenous heterocyclic compound through an acid-base neutralization mode, compared with the method of separately adding polybasic acid and the nitrogenous heterocyclic compound, the thickening agent can effectively promote the activity of low-temperature welding when the thickening agent acts with an active agent, reduce the melting and balling of a melt in the welding process, and promote the wetting of the melt on the surface of a substrate. The inventor discovers that the thickener provided by the invention can also promote the residual cosolvent in welding to be quickly cleaned by water, so that a clean, flat and smooth welding spot is obtained. In one embodiment, the thickener is prepared from a polyacid and a nitrogen-containing heterocyclic compound by acid-base neutralization.
The inventor finds that the thickening agent obtained by using polybasic acid with the carboxyl number of 2-4 contains redundant carboxylate radicals, so that the low-temperature welding activity of the active agent is further promoted, the compatibility with the active agent is also promoted, and the welding residues are promoted to be quickly cleaned by water. In one embodiment, the polyacid has a carboxyl number of 2 to 4 and the polyacid has 10 or less carbon atoms. Examples of the acid include malic acid, fumaric acid, adipic acid, tartaric acid, and citric acid.
In addition, the inventors have found that it is necessary to control the structure of the nitrogen-containing heterocyclic compound, particularly, to use a structure containing an electron withdrawing group such as a hydroxyl group, which promotes compatibility of a thickener with a relatively low water-soluble substance such as a rosin derivative or a terpene oil in a solvent, promotes water solubility and wetting uniformity, and that it is difficult to form a homogeneous phase with a flux to affect wetting effect even when an antimony-containing solder is used, if an alkylamine such as triethanolamine is used for the acid-base neutralization of the resulting thickener. In one embodiment, the nitrogen-containing heterocyclic compound is at least one selected from the group consisting of imidazoles, pyridines, pyrazoles, quinolines.
In one embodiment, the substituents of the nitrogen-containing heterocyclic compound include at least one of hydroxyl, carboxyl, carbonyl, and ester groups. Examples thereof include 4-hydroxypyridine, 2-carboxypyridine, 2-methyl-4-carboxypyridine, 3-carboxypyrazole, imidazole-1-carboxylic acid, 1- (2-hydroxyethyl) imidazole, and 1-hydroxypyrazole.
In one embodiment, the molar ratio of the fatty acid to the nitrogen-containing heterocyclic compound is (0.8 to 1.1): 1, there may be mentioned 0.8: 1. 0.82: 1. 0.85: 1. 0.88: 1. 0.9: 1. 0.95: 1. 0.99: 1.1:1. 1.05: 1. 1.1:1.
the salt obtained by neutralizing the acid and alkali with the main components of the thickener of the invention, which is mainly obtained by neutralizing the acid and alkali with the main components of carboxyl and amino, can be obtained by melting reaction without limitation or solution reaction in water which is well known in the art, wherein the reaction is reversible, the obtained salt can also obtain a small amount of acid and nitrogen-containing heterocycle in water, and the acid-base neutralization is carried out in inert gas atmosphere such as nitrogen, argon and the like. In one embodiment, the thickener is prepared by a melt reaction and/or a solution reaction.
In one embodiment, the melt reaction is a melt mixing of the polyacid and the nitrogen-containing heterocyclic compound at 200-220 ℃ and cooling.
In one embodiment, the solution reaction is obtained by adding polybasic acid and nitrogen-containing heterocyclic compound into water, reacting at 45-60 ℃ and drying. Wherein during the drying process, salt crystallization can be observed along with evaporation and cooling of water, and the salt is obtained by filtration.
In order to reduce the precipitation of the active agent in the welding process and promote the dissolution, the inventor adopts rosin derivatives, terpene oil and alcohol ether to jointly adjust the compatibility and dispersion of the soldering flux in the solder, reduce corrosion and promote the obtainment of a flat and smooth welding spot. In one embodiment, the solvent comprises one or more of rosin derivatives, terpene oils, alcohol ethers, alkyl alcohols. Preferably rosin derivatives, terpene oils, alcohol ethers, in a weight ratio of 1: (0.1-0.3): (0.3-0.5).
Examples of rosin derivatives include, but are not limited to, hydrogenated rosin, disproportionated rosin, hydrogenated rosin alcohol; examples of terpene oils include, but are not limited to, eucalyptus oil, pine needle oil, lemon oil, cypress oil, turpentine, terpineol; examples of alcohol ethers include, but are not limited to, ethylene glycol monophenyl ether, diethylene glycol methyl ether, diethylene glycol monobutyl ether, dipropylene glycol monobutyl ether, tetraethylene glycol monomethyl ether.
In one embodiment, the raw materials for preparing the soldering flux further comprise 1-4wt% of surfactant. The surfactant is not particularly limited in the present invention, and examples thereof include isooctanol polyoxyethylene ether, polyoxyethylene sorbitan fatty acid ester, dodecylbenzene sulfonate, and alkylphenol polyoxyethylene ether, preferably isooctanol polyoxyethylene ether, polyoxyethylene sorbitan fatty acid ester, and alkylphenol polyoxyethylene ether.
The second aspect of the invention provides a preparation process of the high-activity water-washing scaling powder, which comprises the following steps: and mixing the raw materials for preparing the soldering flux at 110-170 ℃ and cooling to obtain the soldering flux. The addition temperature of the feedstock of the present invention may be determined by the boiling point, e.g., a low boiling point feedstock such as propylene glycol may be added below the boiling point.
Compared with the prior art, the invention has the following beneficial effects:
(1) The flux provided by the invention can promote the welding activity and improve the water washability by selecting the polycarboxylic active agent and adding the solvent containing the rosin derivative to adjust the viscosity and the dispersion compatibility during welding.
(2) By adding the thickener with both activity and washability, the activity in the low-temperature reflow process can be further improved, the cleaning of residual soldering flux with poor water solubility such as rosin derivatives and the like is promoted, and the residual soldering flux can be quickly and completely cleaned under the action of pure water.
(3) The soldering flux provided by the invention has high welding reliability, is environment-friendly, has no pollution, has high weldability to various base materials such as Cu, ni, au, pb and the like, avoids the melting of solder into balls, and has neat and bright obtained welding spots and firm attachment.
Drawings
Fig. 1 is a photograph of the soldering flux provided in example 1 after low temperature soldering.
Fig. 2 is a photograph of the soldering flux provided in example 2 after low temperature soldering.
Fig. 3 is a photograph of the soldering flux provided in example 1 after soldering and cleaning.
Detailed Description
Examples
Example 1
The example provides a water-washing scaling powder, which comprises the following preparation raw materials in percentage by weight: 10wt% of an active agent, 9wt% of a thickening agent and the balance of a solvent, wherein the active agent comprises malonic acid, glutaric acid and ethylenediamine tetraacetic acid, and the weight ratio is 1:3:1, the thickener comprises the following components in a molar ratio of 0.99: the thickener is prepared by neutralizing citric acid and 2-hydroxypyridine with acid and alkali, wherein the preparation method of the thickener comprises the steps of adding the citric acid and the 2-hydroxypyridine into water, reacting at 50 ℃ and drying, and the solvent is hydrogenated terpineol, terpineol and diethylene glycol methyl ether, and the weight ratio is 1:0.2:0.36, the raw materials for preparing the soldering flux also comprise 3 weight percent of isooctyl alcohol polyoxyethylene ether.
The example also provides a preparation process of the water-washing scaling powder, which comprises the following steps: mixing glutaric acid, ethylenediamine tetraacetic acid, a thickening agent, a solvent and isooctyl alcohol polyoxyethylene ether at 160 ℃, cooling to 120 ℃, adding malonic acid, mixing, preserving heat for 5min, and cooling to obtain the soldering flux.
Example 2
The example provides a water-washing scaling powder, which comprises the following preparation raw materials in percentage by weight: 14wt% of an active agent, 11wt% of a thickening agent and the balance of a solvent, wherein the active agent comprises malonic acid, succinic acid and ethylenediamine tetrapropionic acid, and the weight ratio is 0.6:2.4:1, the thickener comprises the following components in a molar ratio of 0.8: the thickener is prepared by neutralizing citric acid and 4-hydroxypyridine with acid and alkali, wherein the preparation method of the thickener comprises the steps of melting and mixing the citric acid and the 4-hydroxypyridine at 210 ℃ and cooling, and the solvent is hydrogenated rosin alcohol, terpineol, diethylene glycol monobutyl ether and dipropylene glycol monobutyl ether, and the weight ratio is 1:0.13:0.34, the raw materials for preparing the soldering flux also comprise 4 weight percent of isooctyl alcohol polyoxyethylene ether.
The example also provides a preparation process of the water-washing scaling powder, which comprises the following steps: and (3) mixing succinic acid with ethylenediamine tetrapropionic acid, a thickening agent, a solvent and isooctyl alcohol polyoxyethylene ether at 160 ℃, cooling to 120 ℃, adding malonic acid, mixing, preserving heat for 5min, and cooling to obtain the soldering flux.
Example 3
The example provides a water-washing scaling powder, which comprises the following preparation raw materials in percentage by weight: 8wt% of an active agent, 7wt% of a thickening agent and the balance of a solvent, wherein the active agent comprises malonic acid, adipic acid and ethylenediamine tetraacetic acid, and the weight ratio is 1:2:1, the thickener comprises the following components in a molar ratio of 1.1: the preparation method of the thickener comprises the steps of adding citric acid and 2-hydroxypyridine into water, reacting at 45-60 ℃ and drying, wherein the solvent is hydrogenated terpineol and terpineol dipropylene glycol monobutyl ether, and the weight ratio is 1:0.2:0.3, the raw materials for preparing the soldering flux also comprise 2 weight percent of isooctyl alcohol polyoxyethylene ether.
The example also provides a preparation process of the water-washing scaling powder, which comprises the following steps: mixing adipic acid, ethylenediamine tetraacetic acid, a thickening agent, a solvent and isooctyl alcohol polyoxyethylene ether at 160 ℃, cooling to 120 ℃, adding malonic acid, mixing, preserving heat for 5min, and cooling to obtain the soldering flux.
Example 4
The example provides a water-washing scaling powder, which comprises the following preparation raw materials in percentage by weight: 10wt% of an active agent, 9wt% of a thickening agent and the balance of a solvent, wherein the active agent comprises malonic acid, glutaric acid and ethylenediamine tetraacetic acid, and the weight ratio is 1:3:1, the thickener comprises the following components in a molar ratio of 0.99: the thickener is prepared by neutralizing citric acid and triethylamine with acid and alkali, wherein the preparation method of the thickener comprises the steps of adding the citric acid and the triethylamine into water, reacting at 50 ℃ and drying, and the solvent is hydrogenated rosin alcohol, terpineol and diethylene glycol methyl ether, and the weight ratio is 1:0.2:0.36, the raw materials for preparing the soldering flux also comprise 3 weight percent of isooctyl alcohol polyoxyethylene ether.
The example also provides a preparation process of the water-washing scaling powder, which comprises the following steps: mixing glutaric acid, ethylenediamine tetraacetic acid, a thickening agent, a solvent and isooctyl alcohol polyoxyethylene ether at 160 ℃, cooling to 120 ℃, adding malonic acid, mixing, preserving heat for 5min, and cooling to obtain the soldering flux.
Evaluation of Performance
The soldering flux provided by the embodiment and Sn42Bi58 are prepared according to the weight ratio of 12:88 as solder paste, the following experiment was performed.
1. Activity: three solder pastes are printed on each copper sheet, after welding is carried out at 120 ℃ for 5 minutes and at 180 ℃ for 5 minutes, the spreading condition of the solder pastes and the leveling and smoothing condition of the obtained solder joints in the welding process are observed, wherein the solder pastes provided in the examples 1-3 are melted into a complete block and evenly spread on the copper sheet without shrinkage to form balls, the solder joints obtained in the examples 1-2 are leveled and smoothed and spread on the copper sheet without tin balls, the solder joints are similar to the examples 1 and 2, the solder joints are leveled and smoothed without tin balls, the solder joints provided in the examples 1-3 are evenly spread, and the solder joints provided in the example 4 are leveled.
2. Water washability: three solder pastes were printed on each copper sheet, and after soldering at 120 ℃ for 5 minutes and 180 ℃ for 5 minutes, ultrasonic cleaning was performed in pure water at 50 ℃ for 3 minutes, and flux residue was observed, wherein the results of example 1 are shown in fig. 3, and it was found that all flux residues were cleaned, and that examples 2, 3 were identical to example 1, and no flux residue was found.
The test result shows that the soldering flux provided by the invention has good low-temperature activity and rapid water washability, and the obtained welding spots are smooth and smooth, can be used for welding difficult-to-weld metal substrates such as nickel, gold, palladium and the like besides copper, and further shows that the soldering flux has high activity.

Claims (8)

1. The high-activity water-washing scaling powder is characterized by comprising the following raw materials in percentage by weight: 8-15 wt% of an active agent, 7-12 wt% of a thickening agent and the balance of a solvent;
the thickener is prepared from polybasic acid and nitrogenous heterocyclic compound through acid-base neutralization;
the carboxyl number of the polybasic acid is 2-4, and the carbon number of the polybasic acid is less than or equal to 10;
the molar ratio of the polybasic acid to the nitrogen-containing heterocyclic compound is (0.8-1.1): 1.
2. the high-activity water-washing flux according to claim 1, wherein the nitrogen-containing heterocyclic compound is at least one selected from the group consisting of imidazole-based compounds, pyridine-based compounds, pyrazole-based compounds, quinoline-based compounds.
3. The high activity water-washable flux of claim 1, wherein the substituents of the nitrogen-containing heterocyclic compound comprise at least one of hydroxyl, carboxyl, carbonyl, ester groups.
4. The high activity water-washable flux of claim 1, wherein the thickener is prepared by melt reaction and/or solution reaction.
5. The high activity water-washable flux of any of claims 1-4, wherein the active agent comprises a chain acid having a carboxyl number of 2-5.
6. The high activity water-washable flux of any one of claims 1-5, wherein the solvent comprises one or more of rosin derivatives, terpene oils, alcohol ethers, alkyl alcohols.
7. The high-activity water-washing soldering flux according to any one of claims 1 to 6, wherein the raw materials for preparing the soldering flux further comprise 1 to 4wt% of a surfactant.
8. A process for preparing the high-activity water-washed flux according to any one of claims 1 to 7, comprising: and mixing the preparation raw materials of the soldering flux at 110-170 ℃ and cooling to obtain the soldering flux.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000317682A (en) * 1998-07-02 2000-11-21 Matsushita Electric Ind Co Ltd Solder powder and manufacture thereof, and solder paste
JP2004237345A (en) * 2003-02-07 2004-08-26 Nippon Alpha Metals Kk Soldering flux
CN1972778A (en) * 2004-06-28 2007-05-30 三菱麻铁里亚尔株式会社 Au-Sn alloy powder for solder paste
CN101073862A (en) * 2007-06-08 2007-11-21 北京工业大学 Low-rosin and cleaning-free welding accessory without halogen for lead-free welding grease
CN102794582A (en) * 2012-08-15 2012-11-28 北京工业大学 Soldering flux matched with high-melting-point solder and preparation method thereof
CN107778438A (en) * 2017-11-02 2018-03-09 温州国仕邦高分子材料有限公司 Aqueous polyurethane association thickener and preparation method thereof
CN109093290A (en) * 2018-08-31 2018-12-28 安徽红桥金属制造有限公司 A kind of scaling powder that can be reduced weldment residue and improve welding efficiency
CN111015011A (en) * 2019-12-30 2020-04-17 苏州优诺电子材料科技有限公司 High-stability soldering paste and preparation method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000317682A (en) * 1998-07-02 2000-11-21 Matsushita Electric Ind Co Ltd Solder powder and manufacture thereof, and solder paste
JP2004237345A (en) * 2003-02-07 2004-08-26 Nippon Alpha Metals Kk Soldering flux
CN1972778A (en) * 2004-06-28 2007-05-30 三菱麻铁里亚尔株式会社 Au-Sn alloy powder for solder paste
CN101073862A (en) * 2007-06-08 2007-11-21 北京工业大学 Low-rosin and cleaning-free welding accessory without halogen for lead-free welding grease
CN102794582A (en) * 2012-08-15 2012-11-28 北京工业大学 Soldering flux matched with high-melting-point solder and preparation method thereof
CN107778438A (en) * 2017-11-02 2018-03-09 温州国仕邦高分子材料有限公司 Aqueous polyurethane association thickener and preparation method thereof
CN109093290A (en) * 2018-08-31 2018-12-28 安徽红桥金属制造有限公司 A kind of scaling powder that can be reduced weldment residue and improve welding efficiency
CN111015011A (en) * 2019-12-30 2020-04-17 苏州优诺电子材料科技有限公司 High-stability soldering paste and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
电子工艺用清洗剂的现状及发展趋势;刘子莲;吴松平;罗道军;;电子工艺技术(第05期);1-4 *

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