Core Insights - SK Hynix has completed the development of a 321-layer 2Tb QLC NAND flash product and has officially started mass production [2][3] - The new QLC NAND product features a significant increase in data transfer speed, with a 100% improvement compared to the previous generation, and enhancements in write performance by 56% and read performance by 18% [3] Product Development - NAND flash memory is a non-volatile storage semiconductor that retains data even when power is off, categorized by the number of bits stored per cell, with QLC storing 4 bits per cell [2] - The new product doubles the capacity of existing products, addressing the complexity of memory management that comes with larger capacities [2] - To enhance performance, the number of independently operating units (Planes) within the NAND has been increased from 4 to 6, allowing for more parallel operations [2] Market Strategy - SK Hynix plans to initially implement the 321-layer NAND in PC SSDs, with plans to expand to data centers and smartphones [3] - The company aims to achieve double the integration level through packaging technology that stacks 32 NANDs, targeting the AI server market with high-capacity eSSD solutions [3] - The company’s NAND development head emphasized that the mass production of this product significantly strengthens their large-capacity product lineup while ensuring price competitiveness [3]