Design Exchange Format

Design Exchange Format (DEF) is an open specification for representing physical layout of an integrated circuit in an ASCII format. It represents the netlist and circuit layout. DEF is used in conjunction with Library Exchange Format (LEF) to represent complete physical layout of an integrated circuit while it is being designed.

DEF was developed by Cadence Design Systems.

External links

• LEF/DEF 5.5 Language Reference, Product Version 5.5

• LEF/DEF 5.6 Language Reference from Cadence Design Systems