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by evan_a_a 22 days ago
Modern process nodes with smaller feature sizes are likely to fare far worse under radiation than the nodes of 25 years ago.

Additionally, total dose is only one part of the equation. Single Event Effects (SEE) also must be mitigated.

You can read NASA JPL's ASIC design guidance for a brief intro.

https://parts.jpl.nasa.gov/asic/Sect.3.4.html#A0