The existence of microbolometer arrays implies that we probably have the technology to make micro-scale vacuum tubes
i wonder if anyone will ever find a use for that
-F
@Felthry The MiG-25 jet apparently used compact vacuum tubes in its avionics, but it's not really made any more
@VoxSomniator well yeah there've been compact vacuum tubes before; micro-miniature tubes were used for hearing aids
i'm thinking more... i dunno, something you'd use in conjunction with solid state devices, rather than instead of them
-F
you might be able to achieve really high blocking voltages in pretty small packages using such technology, for instance
i don't know that it would be better than SiC though
-F