SCMOS Layout Rules - Select (N_PLUS and P_PLUS)  

Rule Description Lambda
4.1 Minimum select spacing to channel of transistor to ensure adequate source/drain width 3
4.2 Minimum select overlap of active 2
4.3 Minimum select overlap of contact 1
4.4 Minimum select width and spacing
(Note: P-select and N-select may be coincident, but must not overlap) (not illustrated)
2