Sumitomo Chemical starts mass production of 4-inch InP wafers for AI data centers

Sumitomo Chemical's launch of 4-inch InP wafer production marks a critical breakthrough in the photonic chip supply chain, directly enabling cost reduction and scaling in high-speed optical modules for AI data centers. This move will boost upstream epitaxial vendors and enhance midstream chip designers' competitiveness. However, amid global supply chain realignment, this technology diffusion may intensify competition among US, Japan, and South Korean players in high-end materials. If Taiwan's foundries follow suit, it could reshape global photonic chip capacity. In the short term, major players like NVIDIA and AMD may accelerate in-house photonic interconnect development to mitigate supply risks. Long-term, the maturation of InP technology will force traditional silicon-based photonic integration paths to evolve, creating new competitive dynamics in the industry.