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SK hynix Announces 238 Layer NAND – Mass Production To…

As the 2022 Flash Memory Summit carries on, SK hynix is the newest seller to announce their next era of NAND flash memory at the clearly show. Showcasing for the initially time the company’s forthcoming 238 layer TLC NAND, which claims the two enhanced density/ability and improved bandwidth. At 238 layers, SK hynix has, at the very least for the instant, secured bragging rights for the greatest range of layers in a TLC NAND die – though with mass manufacturing not established to start out right up until 2023, it is heading to be a although until eventually the company’s newest NAND shows up in retail products.

Subsequent carefully on the heels of Micron’s 232L TLC NAND announcement very last week, SK hynix is upping the ante ever so slightly with a 238 layer style and design. Although the variation in layer counts is mainly inconsequential when you’re chatting about NAND dies with two hundred+ layers to get started with, in the really aggressive flash memory industry it gives SK hynix bragging legal rights on layer counts, breaking the former stalemate between them, Samsung, and Micron at 176L.

From a specialized standpoint, SK hynix’s 238L NAND even further builds upon the basic design of their 176L NAND. So we’re at the time yet again wanting at a string stacked style, with SH hynix working with a pair of 119 layer decks, up from 88 layers in the earlier era. This helps make SK hynix the 3rd flash memory seller to grasp creating decks over one hundred layers tall, and is what is enabling them to develop a 238L NAND design that holds the line at two decks.

SK hynix’s NAND decks proceed to be built with their demand-trap, CMOS beneath Array (CuA) architecture, which sees the bulk of the NAND’s logic put underneath the NAND memory cells. According to the organization, their first 512Gbit TLC aspect has a die size of 35.58mm2, which will work out to a density of roughly fourteen.39 Gbit/mmtwo. That is a 35% enhancement in density more than their earlier-generation 176L TLC NAND die at equal capacities. Notably, this does suggest that SK hynix will be ever so somewhat trailing Micron’s 232L NAND inspite of their full layer rely edge, as Micron claims they’ve strike a density of fourteen.six Gbit/mmtwo on their 1Tbit dies.

SK hynix 3D TLC NAND Flash Memory
  238L 176L
Layers 238 176
Decks 2 (x119) 2 (x88)
Die Ability 512 Gbit 512 Gbit
Die Dimension (mm2) 35.58mm2 ~forty seven.4mm2
Density (Gbit/mm2) ~14.39 ten.8
I/O Velocity 2.4 MT/s
(ONFi 5.)
1.six MT/s
(ONFI four.2)
CuA / PuC Yes Certainly

Talking of 1Tbit, unlike Micron, SK hynix is not working with the density enhancements to make greater ability dies – at least, not however. While the enterprise has introduced that they will be creating 1Tbit dies subsequent calendar year working with their 238L approach, for now they are keeping at 512Gbit, the same capability as their earlier technology. So all other things held equal, we should not expect the initial wave drives created utilizing 238L NAND to have any better ability than the current technology. But, if practically nothing else, at least SK hynix’s original 238L dies are pretty tiny – even though regardless of whether that translates at all to more compact offers stays to be seen.

Other than density enhancements, SK hynix has also enhanced the efficiency and electrical power intake of their NAND. Like the other NAND vendors, SK hynix is employing this impending era of NAND to introduce ONFi five. aid. ONFi 5. is noteworthy for not only expanding the best transfer rate to 2400MT/next – a 50% improvement in excess of ONFi 4.two – but it also introduces a new NV-LPDDR4 signaling method. As it is dependent on LPDDR signaling (unlike the DDR3-derrived manner in ONFi four.x), NV-LPDDR4 features tangible reductions in the amount of money of energy consumed by NAND signaling. SK hynix isn’t breaking their electricity intake figures out to this amount of detail, but for total power use, they are touting a 21% reduction in electricity consumed for examine operations. Presumably this is for every bit, so it will be counterbalanced by the fifty% enhancement in bandwidth.

This week’s announcement arrives as SK hynix has started shipping and delivery samples of the 238L NAND to their consumers. As beforehand pointed out, the business is not scheduling on kicking off mass generation right up until H1’2023, so it will be some time prior to we see the new NAND clearly show up in retail products and solutions. In accordance to SK hynix, their strategy is to start with shipping NAND for shopper SSDs, followed by smartphones and large-capability server SSDs. That, in flip, will be followed up with the introduction of 1Tbit 238L NAND later on in 2023.