Radiation Effect of NPN BJTs Under Various Base Doping Conditions

60Co γ radiation effects and annealing behaviors of domestic NPN bipolar junction transistors with the same process technology but different base doping concentrations were investigated. It is shown that transistors with different base doping concentrations make the different responses of high and low dose rate radiation. More degradation can be seen in the lightly-doped base PNP transistors than the heavily-doped base PNP transistors.