I dimly remember reading about a chemical treatment to the material, that would react with the ionized silicon until the reaction was depleted. I do not rememb

I dimly remember reading about a chemical treatment to the material, that would react with the ionized silicon until the reaction was depleted. I do not remember the substance- and it was ridiculous expensive (in addition to the ridiculous expenses of custom made chips) https://en.wikipedia.org/wiki/Radiation_hardening#Physical https://en.wikipedia.org/wiki/Radiation_hardening#Physical