Micron Ships Denser & Faster 276 Layer TLC NAND, Arriving First In Micron 2650 Client SSDs Micron on Tuesday announced that the company has begun shipping its 9th Generation (G9) 276 layer TLC NAND. The next generation of NAND from the prolific memory maker, Micron's latest NAND is designed to further push the envelope on TLC NAND performance, offering significant density and performance improvements over its existing NAND technology. Micron's G9 TLC NAND memory features 276 active layers, which is up from 232-layers in case of Micron's previous generation TLC NAND. At this point the company is being light on technical details in their official material. However in a brief interview with Blocks & Files, the company confirmed that their 276L NAND still uses a six plane architecture, which was first introduced with the 232L generation. At this point we're assuming Micron is also string-stacking two decks of NAND together, as they have been for the past couple of generations, which means we're looking at 138 layer decks. Micron TLC NAND Flash Memory 276L 232L (B58R) 176L (B47R) Layers 276 232 176 Decks 2 (x138)? 2 (x116) 2 (x88) Die Capacity 1 Tbit 1 Tbit 512 Gbit Die Size (mm2) ~48.9mm2 ~70.1mm2 ~49.8mm2 Density (Gbit/mm2) ~21 14.6 10.3 I/O Speed 3.6 GT/s (ONFi 5.1) 2.4 GT/s (ONFi 5.0) 1.6 GT/s (ONFI 4.2) Planes 6 6 4 CuA / PuC Yes Yes Yes On the density front, Micron told Blocks & Files that they have improved their NAND density by 44% over their 232L generation. Which, given what we know about that generation, would put the density at around 21 Gbit/mm2. Or for a 1Tbit die of TLC NAND, that works out to a die size of roughly 48.9mm2, comparable to the die size of a 512Gbit TLC die from Micron's older 176L NAND. Besides improving density, the other big push with Micron's newest generation of NAND was further improving its throughput. While the company's 232L NAND was built against the ONFi 5.0 specification, which topped out at transfer rates of 2400 MT/sec, their new 276L NAND can hit 3600 MT/sec, which is consistent with the ONFi 5.1 spec. Meanwhile, the eagle-eyed will likely also pick up on Micron's ninth-generation/G9 branding, which is new to the company. Micron's has not previously used this kind of generational branding for their NAND, which up until now has simply been identified by its layer count (and before the 3D era, its feature size). Internally, this is believed to be Micron's 7th generation 3D NAND architecture. However, taking a page from the logic fab industry, Micron seems to be branding it as ninth-generation in order to keep generational parity with its competitors, who are preparing their own 8th/9th generation NAND (and thus cliam that they are the first NAND maker to ship 9th gen NAND). And while this NAND will eventually end up in ... SSDs