The FreePDKTM process design kit is an open-source, Open-Access-based PDK for the 45nm technology node and the Predictive Technology Model. It is distributed under the Apache Open Source License, Version 2.0.


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Your download and use of the FreePDK software requires your acceptance of the license agreement.




  • Thanks to Dale Edwards, Bill Joyner, David Yeh of the Semiconductor Research Corporation for their leadership in encouraging involvement
  • Thanks to John Szetela of AMD for his aid in pointing us to good papers
  • Thanks to Rob Aitken of ARM and Oscar Siguenza of Virage for their help in understanding the business of cell-libraries
  • Thanks to Sani Nassif at IBMfor help in evaluating the best techniques for variation awareness
  • Thanks to Sylvia Chanak of Cadence for providing access to the Alba flow and considering its release for this project
  • Thanks to Brad Potts and Ken Jantzen of Mentor Graphics for help in understanding the Calibre Litho-Friendly Design Tools
  • Thanks to Sumit Dasgupta and Nick English of Si2 for their inspiration and support