Samsung Electronics has made the difficult decision to indefinitely postpone mass production of its next-generation D1d DRAM, a key component for high-performance HBM5E memory.
The choice boils down to straightforward economics. The new D1d process is struggling with its yield—the percentage of functional chips produced from each silicon wafer. When yields are low, costs soar, making the return on investment unattractive compared to the company's existing and highly profitable 1c DRAM process. For a new technology to be viable, its yield must be high enough to offset the initial costs and compete with the efficiency of a mature production line.
This marks a sharp reversal from the company's confident stance just a month ago. At Nvidia's GTC event in March, Samsung publicly positioned D1d as the core technology for its upcoming HBM5E products. That announcement set high expectations in the market, which transforms this delay from a simple internal production issue into a more significant public strategy pivot.
Adding to the pressure, the competitive landscape is moving at a rapid pace. Rivals SK hynix and Micron are aggressively pushing forward. Notably, Micron has already begun volume shipments of HBM4 for Nvidia's next-generation "Rubin" AI platform. This move effectively starts the clock, forcing Samsung to prioritize technologies that can be delivered reliably and on time. The most pragmatic response is to double down on the proven 1c process to produce HBM4 and HBM4E, ensuring it doesn't lose ground in the critical AI accelerator market.
Ultimately, Samsung is making a calculated, defensive move. Faced with technical hurdles and intense competition, it is prioritizing near-term profitability and market share by focusing on its mature, reliable technology. The ambitious leap to D1d is now on hold, buying the company valuable time to resolve its manufacturing challenges behind the scenes before re-entering the race.
- HBM (High Bandwidth Memory): A type of high-performance computer memory used in conjunction with high-performance GPUs and AI accelerators. It stacks memory chips vertically to increase speed and efficiency while saving space.
- Yield: In semiconductor manufacturing, this refers to the percentage of non-defective products (dies) produced on a single wafer. A higher yield means lower production costs and higher profitability.
- DRAM Node (1c, D1d): Refers to a specific generation of DRAM manufacturing technology. '1c' and 'D1d' are Samsung's terms for its 6th and 7th generation 10nm-class processes, respectively. Each new node generally aims for higher density, better performance, and lower power consumption.