after reading a lot about parylene used for magnet coatings (which apparently had mixed results) and it's general use in medical applications I was wondering about the difficulties to do parylene deposition in a DIY way.
From what I read up it involves heating a granual base chemical so it sublimates, then heating the resulting gas to perform pyrolysis followed by guiding the gas into the deposition chamber. Everything done in a somewhat moderate vacuum environment.
Some surfaces apparently need priming for proper adhesion of the deposited parylene but other than that, the process seems reasonably straight forward. A vacuum pump, 3 chambers heated at different temperatures and a single chemical don't appear like rocket science to me.
So did I miss something important? Are there any common pitfalls? Does anyone have the equipment to hack up something like that?
Having a working deposition process may allow for fun ways to coat magnets. For example having the magnet suspended free floating in the chamber to get seamless and uniform coating. Or for coating other implants too. Like smallish electronics, which could be sealed with epoxy which qualify only for short-term implantation (as safeguard) and a parylene coat on top of it.