pub const SKY130A_LAYER_RC: &[LayerRc];Expand description
sky130A signal-layer RC for the pre-route estimate.
CAPACITANCE is FITTED: per-net routed length on each layer (the detailed route of
systolic_pipe16_realbist, RUN_2026.09.23_03.24.05) regressed against that net’s OpenRCX wire
capacitance (nominal corner, rules.openrcx.sky130A.nom.calibre), over 23,557 nets of 20 um
or more. The fit reproduces extraction with a 7.3% median error and 0.8% in total. OpenLane
ships no LAYERS_RC, and the uncalibrated estimate it fell back to was optimistic by a median
1.39x (2.02x at p90) on the 30-80 fF nets that fail slew; with this table those estimate at
0.95x (p10 0.86, p90 1.07).
RESISTANCE is the tech LEF’s own RESISTANCE RPERSQ over the layer’s minimum WIDTH
(sky130_fd_sc_hd__nom.tlef), e.g. met1 0.125 ohm/sq / 0.14 um.