From what I know the exact ways it's done are usually kept as trade secrets because it's a very difficult thing to do and you want to recoup all the research co

From what I know the exact ways it's done are usually kept as trade secrets because it's a very difficult thing to do and you want to recoup all the research costs of it, but wikipedia has some high level ways it's done: https://en.wikipedia.org/wiki/Radiation_hardening#Radiation-hardening_techniques https://en.wikipedia.org/wiki/Radiation_hardening#Radiation-...