you don't have solder balls you have solid solder plates. in theory. in practice you have fuck all working because there's a bubble somewhere and you still need an x-ray to even discover it but then you can't rework the goddamn thing anyway
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the liquid only condenses on cold spots of the PCB. unlike IR reflow, VPS can rapidly heat the entire PCB to nearly exactly the same temperature even if you have componets with wildly different thermal mass, material, and reflectivity. it's amazing.
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the liquid is like 50 EUR per 100 ml though
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ahh nice. what kind of machine do you use for that?
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I cobbled together a machine from the cheapest electric pot I found in a store in HK, a PID controller I had lying around, some metal junk as a base, and a solid state relay. search my earlier tweets it has photos
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oh WOW that is awesome
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thank u
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and i saw the website for the fluid you said you used, nice, you can get them in various boiling points
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yep yep. can also use them to cool PCBs by submerging in the liquid, it's absurdly efficient AND it's an incredibly good dielectric. people cool CO2 lasers with it too
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it's also nearly harmless (so long as you don't overheat it). they can carry a lot of dissolved oxygen and there's a picture from an old paper where a mouse is breathing oxygenated fluorinert in a beaker.
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