Method for preparing antioxidant soldering powder
An anti-oxidation and solder powder technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve problems such as unstable solder paste viscosity, affecting solder paste quality and welding reliability, and prone to tin beads, etc., to reduce agglomeration Phenomenon, enhanced antioxidant performance, and cost-saving effects
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[0027] Example 1
[0028] Coating solution ratio (wt%):
[0029] Malonic acid 2
[0030] Oleic acid 5
[0031] Sebacic acid 2
[0032] Polyoxyethylene nonylphenol ether OP-10 8
[0033] Diethylene glycol 20
[0034] N-methylpyrrolidone balance
[0035] The solder powder used is SnAgCu305 4# powder.
[0036] Heat 500g coating solution to 145~150℃, add 200g solder powder, stir to suspend the solder powder in the coating solution, keep for 20min, filter, rinse with a 1:1 mixed solution of absolute ethanol and acetone for several times to remove Excess coating solution on the surface of solder powder. Spread the solder powder on a larger area and dry it in vacuum at 40°C for 1 hour to obtain the coated solder powder.
Example Embodiment
[0037] Example 2
[0038] Coating solution ratio (wt%):
[0039] Succinic acid 15
[0040] Glutaric acid 10
[0041] Benzotriazole 2
[0042] Diethylene glycol octyl ether balance
[0043] The solder powder used is SnAgCu305 5# powder.
[0044] Heat 500g coating solution to 145~150℃, add 200g solder powder, stir to suspend the solder powder in the coating solution, keep for 15min, filter, rinse with a 1:1 mixed solution of absolute ethanol and acetone several times to remove Excess coating solution on the surface of solder powder. Spread the solder powder on a larger area and dry it in vacuum at 40°C for 1 hour to obtain the coated solder powder.
Example Embodiment
[0045] Example 3
[0046] Coating solution ratio (wt%):
[0047] Lactic acid 5.5
[0048] Glutaric acid 3
[0049] P-tert-Butylbenzoic acid 1
[0050] Fatty alcohol polyoxyethylene ether AEO-8 20
[0051] Diethylene glycol butyl ether balance
[0052] The solder powder used is SnBi58 3# powder.
[0053] Heat 500g of the coating solution to 103~108℃, add 500g of solder powder, stir to suspend the solder powder in the coating solution, keep for 30min, filter, rinse with acetone several times to remove excess coating solution on the surface of the solder powder. Spread the solder powder on a larger area and dry it in vacuum at 40°C for 1 hour to obtain the coated solder powder.
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