Do we need to do DFM (Design for Manufacturability)? How is DFM introduced in the tech file?

oDo We Need DFM? - YES

• DFM (Design for Manufacturability): A set of design methodologies and practices aimed at creating layouts that are not only DRC-clean but are also robust against normal manufacturing process variations, leading to higher yield. DFM often deals with “preferred” or “recommended” configurations that are known to be more robust.
• How DFM is Introduced in the Tech File:
• Redundant via insertion – Double cut vias and via enclosers defined in tech lef
• Antenna rules defined in tech file.
• EM: tech lef/file can define basic current density rules.
• Min and max area of shape.
• design-for-manufacturability