nx_litho.nx

nx_litho.nx -- LIB: the semiconductor LITHOGRAPHY / chip-fab process twin (omniforge SI garage-litho; the path to printing our OWN CPUs). Models the real process recipe (clean->oxidize->coat-resist->expose-mask->develop->etch-> dope->strip->metallize) and the real PHYSICS: YIELD via the Seeds model Y = 1/(1+AD) (A=die area, D=defect density), transistors per die as a function of feature size, and cost per WORKING chip. Pinned to the real DIY frontier (Zeloof Z2 ~100 transistor NMOS; CMU Hacker Fab 952 transistors @ ~94% yield). This fabricates the chip whose netlist we designed in sim (the RV64IM CPU). never-brick #26: sim model, deterministic (fabricating a NEW chip is not bricking existing hardware). license_tier: ORIGINAL