Single-Crystal High-κ Dielectric Enables Low-Power 2D CFETs (NUS et al.)

The real bottleneck in CFET roadmaps was never the channel — it is the gate-dielectric interface mismatch with atomically thin layers. Intel's 2025 and Samsung's 2027 CFET programs assume HfO₂ high-κ stacks, yet polycrystalline HfO₂ grain-boundary traps are fundamentally incompatible with TMD channels. NUS/Nexstrom's single-crystal anatase TiO₂ eliminates those defect states entirely; the near-thermodynamic-limit subthreshold swing translates to a 30–40% power reduction at iso-performance, not a lab curiosity. Technical cascade: The TiO₂/TMD pairing bypasses CVD/HAL growth constraints inherent to HfO₂. EDA compact models for 2D devices require recalibration. Upstream, TiO₂ precursor chemistry and wafer-transfer tooling become new IP battlegrounds. Supply-chain: TiO₂ is geologically abundant with no rare-earth concentration risk — structurally significant for decoupling from single-source Hf suppliers. Market dynamics: If Intel's 18A/14A programs validate TiO₂ yield at 200 mm, the HfO₂-centric deposition ecosystem (Axcelis, AMAT) faces a 3–5 year displacement window, forcing equipment vendors to pre-position TiO₂ ALD solutions. 12–24 month tail: Expect Nexstrom to lock transfer-process patents, NUS to spin a pilot line, and at least one IDM to quietly qualify TiO₂ as a secondary dielectric option for sub-2 nm 2D channels. The high-κ material paradigm is shifting from HfO₂ monopoly toward a bipolar structure.