Samsung HBM4 Yield Reportedly Reaches 80%
On August 10, 2026, Samsung Electronics' HBM4 production yield reportedly approached 80%, up from below 60% when mass production began in February, according to TrendForce's reporting citing South Korean media. TrendForce reports that the result reached Samsung's originally stated year-end yield target ahead of schedule, while Wccftech reports the company is targeting a substantial increase in HBM4 revenue during the third quarter.
Samsung Electronics' HBM4 production yield has reportedly climbed to about 80%, from below 60% at the start of mass production in February, according to TrendForce, which cited South Korean media reports. The reported figure reaches what the coverage calls a "golden yield," a production threshold that can materially improve usable output from a semiconductor manufacturing line.
TrendForce reports that Samsung had originally targeted an 80% HBM4 yield by the end of 2026. The firm attributed the faster-than-expected improvement to progress in its thermal compression non-conductive film, or TC-NCF, process, and to yields above 80% for the underlying 1c DRAM process earlier in the year.
HBM4 supply and product specifications
Wccftech reports that Samsung began HBM4 mass production in February with 12-high stacks offering up to 36 GB per stack. It lists 11.7-13.0 Gbps pin speeds, up to 3.3 TB/s of bandwidth per stack, and a 1c DRAM process paired with 4 nm logic.
The outlet also reports that Samsung has increased its expected third-quarter HBM4 revenue by threefold and expects HBM4 to represent more than 60% of its HBM sales in the second half of 2026. Those commercial targets were not independently detailed in the retrieved reports.
Competition for AI accelerator memory
HBM packages combine vertically stacked DRAM with a high-bandwidth interface, making manufacturing yield particularly consequential for accelerator supply. TrendForce reports that tighter HBM supply has shifted memory makers' competition beyond general-purpose DRAM and that Samsung, SK hynix, and Micron are increasing next-generation HBM efforts.
According to TrendForce, Samsung's larger HBM4 output could provide customers including NVIDIA with an additional source for memory used in the next-generation Vera Rubin accelerator platform. TrendForce's June forecast also projected a sharp increase in Samsung's 2026 HBM4 market share, citing customer qualification progress and higher expected shipments; it projected reduced SK hynix share amid qualification delays and capacity shifts, while projecting broadly stable share for Micron.
For AI infrastructure teams, a reported improvement in HBM4 yield matters because memory availability and bandwidth are central constraints in deploying high-end GPU and custom-accelerator systems. Across comparable semiconductor supply transitions, more qualified HBM sources can reduce single-supplier exposure, though actual system availability also depends on packaging capacity, accelerator ramps, and customer qualification.
Key Points
- 1Samsung's reported 80% HBM4 yield improves potential usable memory output as demand for accelerator-class bandwidth continues to tighten supply.
- 2TrendForce links the yield increase to TC-NCF process gains and stable 1c DRAM production, two important HBM manufacturing inputs.
- 3Across comparable HBM transitions, additional qualified suppliers can reduce infrastructure procurement concentration, although packaging and accelerator availability remain constraints.
Scoring Rationale
HBM4 yield is a meaningful indicator for the supply of memory used by next-generation AI accelerators, where bandwidth and capacity can constrain system deployment. The report is important competitive and supply-chain news, but it is based on media-reported yield figures rather than a new product release or independently verified production data.
Sources
Public references used for this report.
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