Samsung Electronics has reportedly halted mass production plans for its D1d DRAM—the 7th-generation 10nm-class memory process—for an indefinite period as of April 22, 2026.
The decision follows a comprehensive management review which determined that current yield numbers (the percentage of functional chips per wafer) were too low to justify the required investment and return on investment (ROI).
1. Impact on AI and HBM5E
The delay is a significant blow to Samsung’s roadmap for high-bandwidth memory, which is the “beating heart” of modern AI accelerators.
- The HBM5E Link: D1d DRAM was intended to be the backbone for HBM5E, Samsung’s 9th-generation high-bandwidth memory.
- Roadmap Disruption: Samsung Memory VP Hwang Sang-jun previously confirmed at GTC 2026 (March 2026) that D1d was critical for HBM5E. With D1d production paused, the HBM5E release is now expected to be pushed back indefinitely.
- Competitor Advantage: While Samsung pauses, competitors like SK Hynix and Micron may have a window to capture design wins for the next generation of AI GPUs.
2. Operational Fallout
The halt has immediate consequences for Samsung’s semiconductor workforce and manufacturing strategy.
- Idle Workforce: Roughly 400 employees assigned to the D1d mass production task force are reportedly idle or being reassigned to yield-improvement research.
- Shift in Focus: Samsung says it will focus resources on yield improvement rather than rushing into a full-scale “trial run” that would result in high waste.
- Packaging Investment: Despite the node delay, Samsung is continuing its multi-billion dollar investment in its Onyang fabrication and packaging facility, signaling a long-term commitment to high-density memory.
3. Future Outlook: The “Sub-10nm” Breakthrough
In a separate development reported on April 24, 2026, Samsung is looking past the 10nm barrier to recover its technical lead.
- 10a DRAM (Single-Digit nm): Samsung has reportedly produced the world’s first single-digit nanometer DRAM working die (known as the 10a process).
- 4F Square Cell Tech: This new technology uses Vertical Channel Transistors (VCT) to reduce DRAM cell area by 50%.
- Productivity: Once mass-produced (likely in 2027), this tech could pack 30–50% more DRAM cells into the same chip area, potentially lowering global memory prices.