US semiconductor industry relies on China for rare earth processing - Global Sources

The rare earth processing bottleneck is more lethal than the EUV monopoly — it lurks inside CMP slurries, ion-implantation targets, and advanced-packaging magnets, components that never make headlines. China commands roughly 70% of global separation and purification capacity. This is not a resource-endowment story; it is a three-decade moat built on environmental compliance costs no other nation has absorbed. A US fab facing a supply cutoff exhausts inventory within three weeks, while rebuilding a 99.999%-purity separation line demands two to three years of permitting alone. The real contest sits in the midstream layer — separation, alloying, functional materials. MP Materials and Lynas are essentially using fiscal subsidies to bridge a 40% cost gap, yet radioactive tailings management remains a compliance barrier no competitor has cleared. Sumitomo and Shin-Etsu hold credible heavy-rare-earth separation IP and will likely serve as friend-shore transit nodes rather than independent capacity. Over the next 18 months, expect three concurrent moves: CHIPS Act capital flowing into domestic processing; tighter Chinese export quotas on dysprosium and terbium; and recycled-magnet extraction scaling from pilot to production. The endgame is not de-China-ization — it is multi-polar redundancy, priced at an extra two to three cents per wafer.