The 4F² Breakthrough: VCT DRAM and the Hybrid Bonding Era for sub-10nm DRAM

DRAM and 3D NAND move beyond planar scaling as vertical integration and hybrid bonding take lead, with VCT‑based 4F² DRAM being key to the transformation.

The technical views presented by memory manufacturers at ISSCC 2026 and the memory technology roadmaps articulated by TechInsights converge toward the same conclusion. DRAM and 3D NAND are no longer evolving solely through planar scaling. Instead, structural redesign, vertical integration, and hybrid bonding are redefining the competitive landscape. The next phase of competition may not center on who can shrink a feature further, but on who can stack, bond, and validate with the highest yield and reliability. VCT-based 4F² DRAM and hybrid bonding stand at the threshold of this transformation, marking both a technological inflection point and a practical test of the industry’s ability to execute three-dimensional memory integration at scale.