Electronic-Grade Metals and Sputtering Targets: Purification Capacity and Chip-Node Supply

The sputtering-target supply chain for sub-5nm logic and advanced DRAM is materially tighter than aggregate commodity balances suggest, because the binding constraint is purification and target-forming capacity, not primary metal availability. Ruthenium has displaced tantalum nitride as the preferred barrier and liner material at the 3nm and 2nm nodes, importing platinum-group-metal supply risk into a segment with no procurement history at semiconductor scale. Tungsten refining remains roughly 80% Chinese-controlled, cobalt feedstock is DRC-concentrated, and tantalum carries conflict-mineral exposure, while fewer than ten Western target manufacturers, among them Materion, Honeywell, JX Advanced Metals, Plansee, Tosoh, and ULVAC, account for most qualified capacity. This report establishes the purification throughput, supplier qualification lead times, and node-specific substitution trends that govern electronic-grade metal availability through 2027.