At the CES show,SK Hynix officially announced the 128-layer stack of 4D flash memory (essentially 3D flash memory, 4D is only a commercial name) that has been used in its own PCIe hard drive, which is the first of the six flash originals to produce 128-layer stack flash memory, expected to be Samsung, West, Everything will follow up with 100 layers of flash this year.
How many layers can 3D flash memory stack? Just as skyscrapers can’t be infinitely high, the number of layers of 3D flash memory is limited, and previous research from vendors has shown that it can stack up to 500 floors, but that’s the limit, and it’s not actually that high.
According to Techinsights’ latest NAND flash roadmap, most flash memory vendors will slow down in 2022 after 200-level sepsis, with only Samsung, Kioxia, Western Number,SK Hynix going to 300 layers in 2023, compared to the number of stack layers that have doubled in previous years. Intel will remain at 200 levels.
But in 2020 there is also a lot of flash growth, Samsung has 128 layers, 136 layers of 3D flash memory, core capacity between 256Gb to 1TB, West Number, Kioxia can do 112 layers of stack, but the core capacity of up to 1.3Tb.
Micron’s 3D flash memory this year can be 128 layers of stack, core capacity of up to 1Tb (QLC flash), Intel will continue to use FG floating gate technology, can do 144 layer stack, core capacity is also 1Tb.
SK Helix’s roadmap is not the same as other vendors, the number of stack layers will be ahead of others, there are now 128 layers of stack, this year there are 176 layers of stack, core capacity can do 2Tb, which is much better than the other five companies, such capacity can easily achieve 32TB.
For the flash memory market, the biggest variable is the domestic YMTC Changjiang Storage, the company only last year officially mass production of 3D flash memory, of which 32 layers of stack is small-scale mass production, 64 layers only in September last year, using the self-developed Xtacking stack structure, core capacity 256Gb, This flash memory will remain the focus of production in 2020, and expanding capacity and increasing yields are key.
In 2021, Changjiang Storage will be able to launch 128-layer stack of 3D flash memory, directly skip the 96-tier stack, this time than Samsung, Toshiba and other companies are somewhat behind, but the gap has narrowed, 2022 will still maintain a half-generation to a generation of technology gap, but objectively, only than Samsung, Toshiba and other companies behind the technology of about a year, has been a domestic flash memory has made great achievements, after all, at that time is only officially mass production for 3 years.