Pan Liding, Shi Ruiying, Gong Min, et al. Mechanism of crossover of transconductance curves in 0.5 μm multi-finger NMOS FETs before and after γ irradiation[J]. High Power Laser and Particle Beams, 2014, 26: 084003. doi: 10.11884/HPLPB201426.084003
Citation:
Pan Liding, Shi Ruiying, Gong Min, et al. Mechanism of crossover of transconductance curves in 0.5 μm multi-finger NMOS FETs before and after γ irradiation[J]. High Power Laser and Particle Beams, 2014, 26: 084003. doi: 10.11884/HPLPB201426.084003
Pan Liding, Shi Ruiying, Gong Min, et al. Mechanism of crossover of transconductance curves in 0.5 μm multi-finger NMOS FETs before and after γ irradiation[J]. High Power Laser and Particle Beams, 2014, 26: 084003. doi: 10.11884/HPLPB201426.084003
Citation:
Pan Liding, Shi Ruiying, Gong Min, et al. Mechanism of crossover of transconductance curves in 0.5 μm multi-finger NMOS FETs before and after γ irradiation[J]. High Power Laser and Particle Beams, 2014, 26: 084003. doi: 10.11884/HPLPB201426.084003
The crossover phenomenon of transconductance curves was found in part of 0.5 m multi-finger NMOS FETs after irradiation experiments. To give a reasonable explanation, we assumed that the radiation effects on each gate of this part of multi-finger NMOS FETs are non-uniform, and the corresponding computer simulations were performed. The simulation results indicate that after non-uniform irradiation, the difference of oxide trapped charges and interface charges of each gate in multi-finger NMOS FETs will make threshold voltage shift asynchronously, leading to the degeneration of transconductance and the crossover of transconductance curves.