This page may contain stale information. Last updated: 2026-06-25
Definition
Nanostack is ibm’s 3D transistor architecture that vertically stacks and staggers transistors to extend semiconductor scaling below the 1nm node. Powers the 0.7nm (7 angstrom) prototype announced June 2026.
Key Points
- ~2× transistor density vs IBM 2021 2nm chips; ~100B transistors on fingernail-sized die
- 40% SRAM scaling — targets AI on-chip memory bottleneck
- Thin dielectric wafer bonding enables multilayer 3D structure
- Earliest commercial production estimated ~5 years (lab prototype only)