Thanks again for the responses. The FIB is very close to what I want. I think it can all be done with deposition, which should not require 100kV. No etching. If some high potentials are needed, so be it.
I would rather avoid annealing it so the dopants would be pre-dilluted in Si. Anyway I was...
I can imagine a way to get rid of vibration in zero-G, or in a colony.
It doesn't matter, I'm done here. I would happily hear from anyone with design experience in mass specs, electron microscopes and the like. I'll keep an eye out, thanks!
So the answers are (as I see it):
Do you think it's possible? = Yes
Has such a thing ever been proposed or prototyped? = probably not
What would the major stumbling blocks be? = beam focus, ion energy control
I expected a bit of pessimism. I'm encouraged by your responses.
Can you attach a resistor to your test point without adding too much capacitance? Take your measurements (test point and reference) through 10k resistors.
What semiconductors = anything from power transistors to processors. No lithography. The idea is to make one little device at a time using only deposition and ion implant. The machine would print the circuits directly onto a die using an ion beam. A single device per day is enough.
So the toxic...
Is it possible to make a bench-top machine that puts out semiconductors in unit quantities? Ideally, it would take a silicon 'blank' and some source of metals and dopants, and fabricate a finished device via ion implant and soft-landing ion deposition.
Do you think it's possible? Has such a...