Apply UV cure solder mask with a resin printer?

[lscw]

I had the idea while reading old threads on PITA methods of DIY solder mask, nothing came up in the search box for it. Surely I'm not the only person to think it?

I guess with a change out of resin/second printer you could do silk screen lettering as well.

[lscw]

Ah, well resin printers are a bit different. They are a bath of UV-cure resin with a high resolution monochrome LCD at the bottom which partially cures an entire layer at a time. Stereolithography I think is the term.

The main issue that I can think of is that they print upside down like a stalactite rather than stalagmite. Maybe just some double sided tape and suction cups would do given how quickly the .02mm/0.8mills will be applied.

Extruding a liquid out of a FDM printer sounds like it could get messy. But the thicker solder masks maybe aren't that far off the viscosity of plastics at printing temperature.

[DavidAlfa]

https://youtu.be/RudStbSApdE

[lscw]

https://youtu.be/RudStbSApdE

that timing isn't suspicious AT all