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In triple-well PMOSFET transistor, a deep n+ well (DNW) is a process used to isolate the substrate noise, which can lead to changes in effect of single event transient (SET). In outer space, collision of cosmic energetic particles with sensitive nodes of integrated circuits can generate electron-hole pairs. The probability of recombination of electrons and holes is different, which results in transient changes of sensitive nodes’ state. Transient potential change is transmitted to the output terminal, that is, a single event transient. In this paper, measured SET effect characteristics of PMOSFET transistors in 65 nm process are performed with heavy particle experiments. Compared with triple-well PMOSFET transistor, the experimental data show that the average of SET pulse width in double-well PMOSFET is increased by 19.4% (Ge linear energy transfer (LET) = 37.4 MeV<inline-formula> <tex-math notation="LaTeX">$\cdot $ </tex-math></inline-formula>cm2/mg) and 14.4% (Ti LET = 22.2 MeV<inline-formula> <tex-math notation="LaTeX">$\cdot $ </tex-math></inline-formula>cm<sup>2</sup>/mg). The data show that a triple-well PMOSFET transistor is better for SET, which is be appropriate for radiation hardened integrated circuits (ICs) design.

Single Event Transient Study of pMOS Transistors in 65 nm Technology With and Without a Deep n+ Well Under Particle Striking