Multi-project wafer service
Multi-project chip (MPC), and multi-project wafer (MPW) semiconductor manufacturing arrangements allow customers to share tooling (like mask) and microelectronics wafer fabrication cost between several designs or projects. With the MPC arrangement, one chip is a combination of several designs and this combined chip is then repeated all over the wafer during the manufacturing.
Source: Wikipedia — Multi-project wafer service (CC BY-SA 4.0)