FLUX
To provide a flux that can suppress occurrence of migration surely in a soldered portion on which flux residue is formed. In the flux that forms solder paste by mixing the flux with solder powders, the flux contains phosphonate ester with an amount thereof such that a hydrophobic film is formed. The...
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| Hauptverfasser: | , |
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | To provide a flux that can suppress occurrence of migration surely in a soldered portion on which flux residue is formed. In the flux that forms solder paste by mixing the flux with solder powders, the flux contains phosphonate ester with an amount thereof such that a hydrophobic film is formed. The phosphonate ester is adsorbed to a surface of a soldered portion during soldering. The addition amount of phosphonate ester is preferably not less than 1 mass % through less than 30 mass %. It is preferable that the phosphonate ester is diethyl benzylphosphonate, diethyl allylphosphonate, diethyl (p-methylbenzyl)phosphonate or (2-ethylhexyl)-2-ethylhexyl phosphonate. |
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