Experimental Study on Irradiation Effects of γ, X and Neutron in Floating ROM Devices

γ-ray，X-ray and neutron irradiation effects of floating ROM devices were measured. The measured results show γ-ray，X-ray and neutron irradiation effects of floating ROM devices are total dose effects. There is a dose threshold when error occurs. At the beginning of error occurrence, the error address and data are random, and the data errors number goes up with the increase of dose or fluence.