The NanGate45 Open Cell Library is available under the Apache2.0 license from Silicon Integration Initiative (Si2). It is based on FreePDK45 from North Carolina State University. [\[FreePDK45 Link\]](https://eda.ncsu.edu/downloads/)
As the FreePDK45/NanGate45 enablement does not have memory generators, we use the bsg_fakeram memory generator available in the [bsg_fakeram](https://github.com/jjcherry56/bsg_fakeram) GitHub repo.
With this combined enablement, testcases with SRAMs can be synthesized, placed and routed using both proprietary (commercial) tools such as Cadence Genus/Innovus, and open-source tools such as OpenROAD.
The [*./lef*](./lef) directory contains the technology, standard cell and macro lef files, the [*./lib*](./lib/) directory contains the standard cell and macro liberty files and the [*./qrc*](./qrc/) directory contains the qrc technology file.
