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Samsung announced on April 23, 2024, that it had begun mass production of what it called the industry’s first 1Tb triple-level-cell (TLC) 9th-generation V-NAND. The milestone combines a new NAND generation with a 1-terabit capacity per die and a higher bit density than Samsung’s previous generation. It is a manufacturing announcement—not confirmation that any particular retail SSD uses this NAND.
What was Samsung’s TLC NAND milestone?
The announcement concerned 1Tb TLC 9th-generation V-NAND. “1Tb” means one terabit of capacity per NAND die; it does not mean a 1TB SSD. TLC describes how the flash stores three bits of data per cell, while V-NAND is Samsung’s vertically stacked NAND technology.
Samsung said the new generation has approximately 1.5 times the bit density of its previous generation. Its April announcement also described the improvement as about 50% compared with the previous generation. These are two ways of expressing essentially the same relative increase, not separate gains. The comparison is Samsung’s own claim, not an independent benchmark. Samsung’s April 23, 2024 announcement and its July 5, 2024 technical overview describe the density improvement.
How did Samsung say it achieved the higher density?
Samsung cited a double-stack structure and advanced channel-hole etching. In this approach, channel holes are etched through the stacked structure to form the paths used by NAND cells. Samsung said its etching technology enables the highest layer count possible in its double-stack approach and improves productivity. The company also pointed to the generation’s smallest cell size and thinnest mold.
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Samsung further described cell-interference avoidance and cell-life extension technologies, which it said help manage interference and improve speed, power efficiency, quality, and reliability. These are manufacturer claims; the cited announcement and technical overview do not provide a complete independent test comparison or numerical endurance results.
What does a 1Tb TLC milestone mean for SSDs?
A higher bit density can help a manufacturer fit more storage capacity into a given die area or make NAND production more efficient. Samsung positioned its TLC V-NAND for high-performance SSD solutions. That makes the milestone relevant to future storage products, but it does not establish that every Samsung SSD released after April 2024—or any named consumer model—contains this specific NAND.
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Samsung’s September 12, 2024 announcement of mass production of 1Tb QLC 9th-generation V-NAND provides useful context: the company positioned TLC for performance and QLC for density, describing the two variants as addressing AI-era storage needs. TLC stores three bits per cell; QLC stores four, generally favoring density. The cited announcements do not supply a complete side-by-side benchmark of interface speed, endurance, or reliability, so they are not enough to determine which product is better for a particular workload. Samsung’s QLC announcement covers that later launch.
How to compare NAND generation claims
A generation label or capacity figure alone does not determine SSD performance. When assessing a NAND announcement or a product built with it, compare the details that affect the intended use:
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- Cell type: TLC or QLC, and the workload each is positioned to serve.
- Bit density and die capacity: distinguish bits per area from capacity per die; neither is the same as total drive capacity.
- Stack and process design: consider the manufacturer’s stated structure and manufacturing techniques.
- SSD-level specifications: look for interface speed, endurance, reliability information, and workload guidance for the actual drive. The cited Samsung milestone materials do not provide a complete independent comparison on these measures.
Samsung’s 9th-generation V-NAND timeline
- April 23, 2024: Samsung announced mass production of 1Tb TLC 9th-generation V-NAND.
- July 5, 2024: Samsung published a technical overview reiterating the April production start and its approximately 1.5× bit-density claim.
- September 12, 2024: Samsung announced mass production of 1Tb QLC 9th-generation V-NAND, following the TLC launch.
- 2025: Samsung’s interim report recorded the TLC milestone and the 1.5× density improvement over Gen 8.
Samsung Flash Product & Technology chief SungHoi Hur said at the TLC announcement: “We are excited to deliver the industry’s first 9th-gen V-NAND, which will bring future applications leaps forward.”
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