there are several threads regarding microscope slides
Forums at Splitcoaststampers
I had trouble doing searches yesterday and couldn't get into the gallery at all - but when I did a search just now about this 8:53 a.m. (eastern) on 9/9 many forum threads came up.
I'm wanting to try this too - and just had a friend who was going to Minneapolis pick me up some copper foil tape (we live in a rural area with not even a Joanne's anymore). I don't think I'll do the soldering on it because I want to make it a simple thing for my Stamp Club to do.
I'll post my samples when I get them done. Hope you'll find what you're looking for - good luck.