I'm relatively (ok, very) new to electronics. I'm trying to find where to buy parts (or even just more information on what sort of materials I should be looking for) to build a circuit board with a micro controller and RF transmitter that can withstand being exposed to a hot, dry environment. The upper end of the temperature range would be 200C (~392F), and would be need to be able to operate under constant exposure to this temperature for 8-12 hours. Ultimately, it would need to be fairly small (we're hoping to keep it smaller than the size of a couple 9V batteries stacked together)
Not being a traditionally educated EE or material scientist, I'm very much out of my element here - referrals to other sources of information, web sites, etc., so that I can at least get an idea of direction would be tremendously helpful.
I would also be interested to hear more information about thermal protection methods - would there be a way that I could build an enclosure to protect the internal electronics from the same environment. I would think that no matter the sort of "housing" I could build, without an active cooling system (which is all but prohibited given the target form factor), then the electronics themselves would need to be able to tolerate the temperature - but I would certainly love it if someone could correct my naive assumptions here.
Thanks for any advice/help.