DICE flip-flop
Beginner
A memory cell that keeps a backup copy inside itself, so one hit can’t flip it.
Novice
Dual Interlocked storage Cell: a flip-flop design that holds each bit on two linked pairs of internal nodes, so if a particle disturbs one node, the others restore it.
Expert
Cheaper than TMR in area, but one strike that disturbs two nodes at once can flip it. Effectiveness drops at highly scaled nodes, where charge spreads further, which led to variants (T-DICE, F-DICE, LEAP-DICE) and node-spacing rules.
Explained in Space (Industries).