A kind of high-performance halogen-free lead-free solder paste and preparation method thereof
A halogen-free lead-free solder paste, high-performance technology, applied in the field of high-performance halogen-free lead-free solder paste and its preparation, can solve the problems of blackening of the periphery after soldering, a large number of tin beads, and a large number of residues, and achieve solder joints Bright and full, less residue, low corrosion effect
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Embodiment 1
[0031] A high-performance halogen-free lead-free solder paste, including the following components in terms of mass percentage: 80% of Sn58Bi42 alloy powder, 4% of tin lactate, 1% of dioctanoic acid phosphate, 0.5% of hydroxyethylene diphosphonic acid, polyaniline 1%, 0.5% diisooctyl diphenylamine, 2% polyamide-modified hydrogenated castor oil, 3% hydrogenated rosin resin, 8% co-solvent.
[0032] The auxiliary solvent is composed of ethyl borate, N,N-dimethylacetamide, and diethylene glycol butyl ether in a mass ratio of 2:1.5:4.
[0033] Preparation steps:
[0034] S1: Add hydrogenated rosin resin, polyamide-modified hydrogenated castor oil, polyaniline, dicaprylic acid phosphate, ethyl borate, N,N-dimethylacetamide, diethylene glycol butyl ether into the reaction kettle, Fully stir and dissolve at 100°C, add diisooctyl diphenylamine and hydroxyethylene diphosphonic acid when the solution is cooled to 80°C, stir evenly, continue to cool to room temperature, add tin lactate an...
Embodiment 2
[0038] A high-performance halogen-free lead-free solder paste, including the following components in terms of mass percentage: 85% of Sn58Bi0.3Ag41.7 alloy powder, 5% of zinc salicylate, 2% of dicapric acid phosphate, hydroxyethylene di Phosphonic acid 0.2%, polyaniline 0.5%, dialkyl diphenylamine 0.5%, ethylene bis stearic acid amide 1.8%, disproportionated rosin resin 2%, cosolvent 3%.
[0039] The auxiliary solvent is composed of ethyl borate, N,N-dimethylacetamide, and diethylene glycol butyl ether in a mass ratio of 4:3:5.
[0040] Preparation steps:
[0041] S1: Add disproportionated rosin resin, ethylene bis stearic acid amide, polyaniline, dicapric acid phosphate, ethyl borate, N,N-dimethylacetamide, diethylene glycol butyl ether to the reaction kettle , fully stirred and dissolved at 120°C, when the solution was cooled to 70°C, added dialkyl diphenylamine and hydroxyethylene diphosphonic acid, stirred evenly, continued to cool to room temperature, added zinc salicyla...
Embodiment 3
[0045] A high-performance halogen-free lead-free solder paste, including the following components in terms of mass percentage: Sn64.5Bi35Cu0.5 alloy powder 82.5%, zinc citrate 2%, monoisodecanoic acid phosphate 2%, hydroxyethylene di Phosphonic acid 1%, polyaniline 1.5%, butyloctyldiphenylamine 0.5%, hydrogenated castor oil 0.5%, polymerized rosin 4%, cosolvent 6%.
[0046] The auxiliary solvent is composed of ethyl borate, N,N-dimethylacetamide, and diethylene glycol butyl ether in a mass ratio of 3:2:3.
[0047] Refer to Example 1 for the preparation steps.
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