Taiwan proposes expanding protected technology list to 46 items

Taiwan, China's move to classify AI chip substrates as a core protected technology is not a bureaucratic list update—it is the first systematic weaponization of advanced packaging. Technology cascade: ABF substrates, silicon interposers, and glass substrates—the physical foundation of CoWoS and Foveros architectures—have historically sat outside export control regimes. Once protected, Ajinomoto's ABF film formulations and TSMC's yield data enter a no-cross-border gray zone. The chokepoint migrates from lithography down to the packaging bench. Compliance exposure: Ibiden, Unimicron, and AT&S face structural friction in cross-border R&D. If NVIDIA or AMD architecture files reference substrate stack-up, new review obligations trigger. Per-HBM-stack packaging BOM costs will inflate 8–15% as supply chains re-shore. Strategic counterplay: BIS will almost certainly follow within 12 months, folding substrate design rules into derivative control clauses. Japan accelerates domestic glass-substrate production. The substrate stack retreats from global division of labor into bloc-internal loops—replaying the 2019 EUV photoresist scenario. 18-month outlook: Glass substrates and silicon interposers enter an arms-race cadence. Whoever defines the substrate specification locks the physical ceiling of AI compute. Packaging is no longer a back-end step. It is the new lithography.