Sk hynix presents the 4d nand, it only equals the 3d nand of other manufacturers
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The war is in the flash memory market, and the competition to offer the best at the lowest price is fierce. Today we were talking about the new Intel QLC SSD. Well, now that the Flash Memory Summit has taken place, the NAND maker SK Hynix has announced its so-called "4D NAND", something that seems more like a form of marketing than revolutionary technology.
4D NAND: Nothing new?
It is no secret, using special names and brands to try to make certain technologies similar to those already existing 'different' and unique is a strategy widely used in the world of technology. Well, according to Tom's Hardware portal, Hynix's new "4D NAND" is nothing more than a slightly improved 3D NAND.
Well, flash memory consists of two components: the cell and the periphery. In the case of 3D NAND, the cells (called CTF) are vertically stacked offering various advantages over traditional 2D NAND, where the cells are called FG or Floating Gate. They have a higher data density without sacrificing durability (rather increasing it, according to the manufacturers), greater energy efficiency and improved performance. What Hynix has called "4D NAND" consists of placing the periphery under the cell, instead of next to it, allowing a smaller chip size and lower costs . This is called PUC or "Periphery Under Cell". So far so good, right?
As it turns out, this had already been done for some time by the manufacturers Toshiba / Western Digital and Samsung. In other words, it is nothing more important than a small evolution that leaves Hynix's NAND in line with that of these two manufacturers, at least in this specific aspect.
As we already said, this does not make Hynix a “ cruel ” company (to call it somehow), they simply do the same as a lot of brands and manufacturers, but it is necessary to report it because no, Hynix has not brought NAND to the fourth dimension.
Apart from this improved 3D NAND, SK Hynix also showed its roadmap in which they plan to reach at least 128 layers or “stacks” of NAND in the near future, a density that will increase over the years. During this 2018 they will launch their 96-layer "4D NAND", and their QLC will be released in 2018, somewhat behind the rest of the manufacturers that already sell or launch these memories this year.
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