I'm not talking 3nm top-of-the-line stuff (though Intel / Arizona is close to that). I'm talking about our 50-cent voltage regulator chips that's seemingly outside the ability for Russia to make (As Russia is clearly taking Ti chips from us somehow).
It's hilariously sad to see them struggle with sourcing such low levels of technology. This is decades old 180nm or older chips here.
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China is far far ahead, at least at EUV, likely under 10nm these days.
This is incorrect - Russia does have domestic 180mm, 90nm, and 65nm fabs. You can even buy chips made at those fabs.
Ultimately it's cheaper to import a 50cent TI DAC (or a clone from China) than go through the entire design pipeline for your own. The rational choice is to import commodity grade chips (which can't be sanctioned anyways) and leave the domestic fabs to more sensitive things like radars, EW systems, etc... That require custom silicon.
We can see that Russia prefers to import these $1 or cheaper chips, rather than build their own.
Every black market trick they do to penetrate customs to get these chips is another trick we can track and close down. Its ongoing work, but likely important for other wars that have yet to come (see China, who might pull the same crap if they start anything with Taiwan).
They can't make newest-generation chips for a flagship smartphone, but simpler devices are likely going to be fine.