Ever wonder how solder paste works? Today we decided to take some cool close up footage of solder paste during reflow soldering.
But first, here's a quick crash course about reflow soldering. Solder paste is a mixture of flux and tiny solder balls. When you heat solder paste with a hot plate or hot air gun, all of the tiny balls will melt and combine into liquid solder. This liquid likes to flow onto the exposed metal of a pad on your PCB and the pads on your components. It then solidifies when you turn the heat off. This will permanently attach a component to your board.
This is what the stuff looks like before heating:
And this is what happens when it's heated up to 200 degrees Celsius.
Pretty cool ;)
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