The agreed list of process, voltage and temperature corners and statistical conditions at which standard cells, IOs and memories are characterised for the kit.
Specification Work product in the Process design kit (PDK) development lifecycle
It makes sure every library is characterised at the same conditions designers will sign off at. Libraries from different teams using different corners stop designers closing timing consistently, and missing corners are discovered at tape-out.
The full lifecycle detail, with its charts, flows, tables and every section, is for registered members. Registration is free and takes a minute. You come back to this page afterwards.