Element Six and Entegris Announce Strategic Collaboration to Integrate Synthetic Diamond into Semiconductor Advanced Packaging for GPU and RF Devices - AZoM

Diamond's 2000+ W/mK thermal conductivity isn't an incremental upgrade—it's a paradigm break in thermal management for 3D-stacked architectures. The strategic signal matters more than the technical one: Element Six (De Beers) locking in with Entegris is a deliberate Western supply-chain firewall. With China's Henan cluster commanding over 90% of global synthetic diamond output, this partnership creates a geopolitically insulated thermal-materials pipeline for GPU and RF packaging. On the technical stack, CVD diamond wafers feeding diamond-coated interposers for HBM and GPU die-attach effectively bypass traditional TIM ceilings, pushing TDP limits 30-40% higher without re-architecting cooling infrastructure. Competitive dynamics: Coherent, Sumitomo Electric, and Chinese CVD players (Sifangda, Yellow River Whirlwind) face lock-in risk. But the real disruptor is microchannel liquid cooling and 3D integration eroding the need for passive thermal layers altogether. 12-24 month call: diamond thermal layers become standard in HBM4 packaging; CVD cost drops below $50/cm²; RF power-amp efficiency gains reshape 6G base-station density economics. The window for late entrants is closing fast.