Double Patterning (DPT) in VLSI: LELE, SADP, Coloring and Stitches for Physical Design
Why double patterning is needed below the single-exposure pitch limit, how LELE and SADP work, what coloring, odd-cycle conflicts and stitches mean, and how DPT changes placement, routing, extraction and DRC, with illustrative examples, a debug flowchart and interview Q&As.