DFM purpose is to help a given design to be manufactured in volume with maximum yield. Design for Manufacturing = improve robustness versus defectivity and process window.
DFM Principles
1/ Do not use min rules when not necessary
– Find best compromise between all recommendations
– Pay specific attention to repetitive cells
( i.e., lot of instances per product like standard cells and some sub-circuits in
memories …)
– Take care of critical signals
(noise, timings, matching …)
– Most of the gain comes out from small improvements
2/Target homogeneous density for each layer
3/And for all of these, do not increase chip or cell area