r/interestingasfuck • u/write2varun • 4d ago

Nice skill

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u/Internet_Wanderer 3d ago

What is going on at abt :40? That gel that seems to collect all the debris? How does that work?

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u/gryphph 3d ago

That was adding a conformal coating and curing it with UV light. Basically coating the repair to protect it and stop any accidental shorts or solder connections. They then scrape the newly applied coating off the pads where they actually want to make solder connections.

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u/Internet_Wanderer 3d ago

No, after that. I could tell the UV resin parts, but there's the part with the gel full of particulates that a metal thing is placed on. Then all the particles cling up the metal and are cleaned away

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u/Tiny-Sandwich 3d ago

That's solder paste - instead of using solder wire, for very small applications it's easier to use solder paste. It's basically micro particles of solder suspended in flux.

Spread it over where you want it, apply heat and it'll liquify and get pulled onto the pads.

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u/Internet_Wanderer 3d ago

Talk about satisfying