Yea thats different then the nanoscale packaging, it sounds like some kind of microscale or miliscale technology. (yes, its a term, look up milifluidics, some people actually call it that, I had trouble finding a classifier between microfluidics and fluidics at first for something I was interested in.)
It sounds like you might be kinda able to make this stuff, its more approachable then the thing david hess brought up. Sounds like a good backup circuit for your boron or whatever hardened processor for mission critical things, even if its simple, it sounds more reliable, or maybe for a power supply circuit or for a analog front end for a hardened MCU. It might end up lighter too.
How were they heating it?