The Silicon Zoo is a collection of logic cells found in silicon chips. The collection is provided freely for the study, comparison, and reverse-engineering of silicon implementations.

Each logic cell on silicon chips performs a simple function such as inverting a single bit (INV), computing the logical AND of two one-bit values (2-AND), or temporarily storing a bit (flip-flop, FF). In most modern chips, the logic cells are picked from a library of cells, called standard cell library. These libraries vary for different manufacturers and process generations. The Silicon Zoo wants to make as many as possible of these libraries available to researchers.

Contributions to the collection are greatly appreciated. We welcome the submission of pre-parsed cell images like those provided below, but also images of the lower two layers of silicon chips from which we can extract the cells.

The slides of a talk at The Last HOPE where The Silicon Zoo was announced are here.