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Is there a lead-free solder that prevents dissolution of Cu?

April 26, 2017CU dissolution Lead-Free solder

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Is there a lead-free solder that prevents dissolution of Cu?

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It is possible to prevent Cu dissolution by making Cu content 2-6% of the lead-free solder. When Cu content of solder is increased, liquidus temperature also rises unfortunately. Higher soldering temperatures could lead to reliability issues for components and boards. Also certain additions of nickel to lead-free solders particularly with SnCu solders can help in reducing solder pot dissolution.