The CNFET-OCL project is to develop open source cell libraries for predictive sub-10nm carbon nanotube field effect transistor (CNFET) technology. CNFET7 and CNFET5, the cell libraries for the 7nm and 5nm CNFET technologies, respectively, are now open and help to design various combinational and sequential circuits by combining with EDA tools. Both libraries are built with the VS-CNFET model developed by the Nanoelectronics Lab in Stanford University and well reproduce the cell libraries used in the state-of-the-art research work that designs the OpenSPARC T2 processor with CNFETs. For more details on CNFET7, see our ASP-DAC'23 paper.
CNFET7 and CNFET5 include the following files.
The Liberty files can be read from Cadence Genus directly. If you would like to use Design Compiler for logic synthesis, please use Library Compiler to convert a .lib file to a .db file.
The LEF and QRC files are used in Cadence Innovus and Quantus for P&R and parasitic extraction, respectively. Our cell library does not support P&R with Synopsys tools at present. QRC file has two versions, one is generated with regular dieletric constant, the other one is generated with a low K(K=2.5) assumption. Because the QRC file is compressed with gzip, the decompression is needed before use. For the decompression, you move to the QRC dierectory and then type the following command.
gzip -d *.gz
If you have Synopsys StarRC, you can also use the Nxtgrd file for parasitic extraction with LEF and DEF files after P&R. The Nxtgrd file was generated with regular dieletric constant.
If you use our cell library in any published work, we would appreciate a citation for the following paper.
Our cell library has a BSD 3-Clause license.
If you have any questions or problems, please contact cnfet@hpc.is.uec.ac.jp.