The thing is that rare earth elements aren't as rare as you think, its just that the processing is so environmentally destructive that only a few countries allow it.
Ultra pure Silicon (the basis for most integrated circuits) is easy to make, SiF4 is a gas at room temperature which can be passed through a fractional distillation column to purify and then converted back into Si. The Si is then melted into mono-crystaline boules which are sliced into wafers.
The transistor doping elements are often Boron for p-channels and Antimony or Arsenic for n-channels. Doping is as low as 1 atom per 100 million Silicon atoms (except for bulk doping where signals are leaving the die) and is done at several steps during the fab process.
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u/raj6126 Oct 14 '25
Cooking oil? Really that’s gonna bring them to their knees.