French research institute CEA and Taiwanese foundry PSMC are partnering to combine RISC-V processor cores with silicon photonics in advanced 3D architectures, aiming to create more powerful and energy-efficient AI computing platforms. The collaboration involves CEA-Leti (microelectronics) and CEA-List (software and systems integration) working with Powerchip Semiconductor Manufacturing Corporation (PSMC).
The joint effort will focus on integrating open-source RISC-V CPU cores with silicon photonic interconnects using 3D stacking and interposer technologies. This approach seeks to overcome current bottlenecks in data movement and bandwidth that limit AI accelerator performance and energy efficiency. Silicon photonics—using light to transmit data on-chip and between chips—promises significantly higher bandwidth and lower power consumption compared to traditional electrical interconnects, especially over short distances.
The partnership will leverage PSMC's semiconductor manufacturing expertise and CEA's research in 3D integration, heterogeneous systems, and photonic-electronic co-design. A key goal is to develop prototype platforms demonstrating the synergy between RISC-V's architectural flexibility and photonic interconnects for AI workloads. The collaboration is framed as part of a broader European strategy to build sovereign capabilities in next-generation computing hardware, reducing dependence on proprietary architectures and foreign supply chains for critical AI infrastructure.