Standard Cell layout guidelines
Orgin of cell at 0,0 in lower left hand corner
Cell width multiple of 7 lambda, height is 99 lambda
Vdd/Gnd rails 15 lambda wide, start at 1.5 lambda vertical spacing inside cell boundary
- This way, if router does not support flipping rows, then cells can be abutted vertically without DRVs
PTAP, NTAP contacts under power rails
Cells can be abutted horizontally without DRV’s.
Grow transistors from cell bottom towards cell center
- Use poly routing wherever possible, limit to 30-45 um
- If have to block horizontal MET1 route, block from one side only