Fig. 1. Picture of the device under ⁶⁰Co irradiation

Fig. 2. Statical power current of the SRAM under different total doses and dose rates: (a) 180 nm; (b) 65 nm

Fig. 3. (a) Statical power current of the 28 nm SRAM under different total doses and dose rates; (b) increasment ratio of the device under different doses

Fig. 4. Dynamic current of the 28 nm SRAM with and without the radiation

Fig. 5. Influence of the temperature on the TID

Fig. 6. Typical dose rate and the nonuniformity of the source (color online)