| March 9, 2022: First draft of the open_pdks installer for the Global Foundries | |
| gf180mcu (180nm) open PDK. | |
| July 27, 2022: Open source repositories now available on github, so integrating | |
| directly into open_pdks. | |
| February 14, 2023: Added PDK variant gf180mcuD, which is like gf180mcuC except | |
| has a top metal thickness of 1.1um instead of 0.9um. According to GF, this is | |
| preferred for better wire bonding yield on the pads. The first open MPW was | |
| done with gf180mcuC, but all subsequent open MPWs will be done with gf180mcuD. |