Devices of single poly electrically ersable programmable read only memory (EEPROM) and silicon-oxide-nitride-oxide-silicon (SONOS) EEPROM on silicon on insulator (SOI) are fabricated on self-built 0.8 μm SOI process. And through a set of experiments on EEPROMs of these configurations and comparisons, SOI SONOS EEPROM is successfully developed with good and stable total dose radiation hardened characteristics. These provide stronger proofs to choose EEPROM in radiation hardened circuits.