Nickel substrates for sub‑3 nm deposition

1. Contamination budget

At ≤ 3 nm lithography, lateral defect density tolerances fall below one per wafer quadrant. Metal trace contaminants — in particular Cu, Pb, K and Na — seed defect nucleation during atomic‑layer‑deposition (ALD) and electron‑beam evaporation. The NSL Analytical trace‑element chemistry for NP1 (< 1 ppm Pb, < 4 ppm Cu, < 2 ppm Na+K) sits inside the budget specified by SEMI F57 and equivalent substrate standards.

2. Grain‑size uniformity

Electron‑backscatter diffraction on NP1 wire shows a mean grain size of 2.1 µm ± 0.3 µm after 1,050 °C annealing, with a log‑normal distribution truncated at 4 µm. Uniformity is a prerequisite for reproducible ALD nucleation density; the NP1 distribution compares favourably to commodity cathode (mean 5.4 µm, σ 2.1 µm).

3. Applications

Target applications are (a) substrate wire for 3D chip‑packaging interconnects in AI‑accelerator GPU stacks, and (b) superconducting interconnect carriers for cryogenic quantum‑computing hardware. Both require sub‑3 nm feature reproducibility at scale.