I'm gonna be doing a series of boards that will be potted in epoxy.
There will be no heat. The traces are 0,6mm, no vias, one sided, trough hole, about 80, 0,8mm holes, fairly coarse layout.
Being potted it would get rid of any environmental or mechanical stress. I have no FR2 experience, but i've seen .5 mm traces on them. The main reason for going with FR2 i would say easier to work with, and easier on the HSS drills. I think FR4 might be overkill.
I'm mostly concerned about drilling precisely. Dremel hand drilling..hmm...i'd probably should go with 0.6 mm drill, to get a 0.8 mm hole and high rpm.
I'd love to try CEM-1, seems just what i need, but it's rare as unicorns. FR3...epoxy adds to the mechanical properties, but same as CEM1, hard to get. (ebay, amazon...)
Any suggestions on the hole sizes, drilling, pitfalls?
Any cheap sources of CEM1, FR3?
Well yes, but then i'd also need a need a new head for the dremel, because it normally doesn't hold 3 mm diameter inserts. Good drill bits are also not cheap. I'm really not looking forward to all that drilling, cutting, for something that will end up submerged in epoxy anyway. (i'm too lazy)
I'd probably settle for an extra thin FR4 board if anyone knows any good sources? 1.5mm is just really overkill.
Yes. Just not economical for my needs to be drilling/cutting glass that thick. I'll check them out. I also found a supplier of thinner fr4 boards. Might get some luck there. My guess...0.6 mm would be more than enough.
