An eight megabit Rad Hard SRAM, implemented in 130nm CMOS technology, uses stacked capacitors within the memory cell for robustness, supply power gating and internally developed array power supplies to achieve very low soft error rates and standby current consumption under 600nA.
Citation:
Mark Lysinger, Francois Jacquet, Mehdi Zamanian, David McClure, Philippe Roche, Naren Sahoo, John Russell, "A Radiation Hardened Nano-Power 8Mb SRAM in 130nm CMOS," isqed, pp.23-29, 9th International Symposium on Quality Electronic Design (isqed 2008), 2008