The solder paste reflows in a molten state, creating permanent solder joints. Reflow soldering is a process in which a solder paste (a sticky mixture of powdered solder and flux) is used to temporarily attach one or thousands of tiny electrical components to their contact pads, after which the entire assembly is subjected to controlled heat.
Example of reflow soldering thermal profile. Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources.
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