SK hynix completes HBM4 internal qualification, ushering in custom base die competition
blaizedsouza · x · 2026-09-14
SK hynix says it has completed internal qualification for HBM4 and established a mass-production system ready for customer shipments.
The key change isn't just bandwidth or stack height: HBM4 introduces customer-specific logic/base dies, enabling much deeper co-design between HBM and AI accelerators. Competition is shifting from memory performance and yield toward custom logic and system-level integration. The linked piece adds the Hot Chips 2026 takeaway: AI's next bottleneck is data movement, not FLOPS, which is why hybrid bonding is moving to the center of the roadmap.
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