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176-layer 4D NAND Flash

13.12.2020

SK Hynix announced the completion of the "industry's most layered" 176-layer 4Gb TLC 512D NAND flash memory. In November, memory samples were sent to controller manufacturers.

The manufacturer is pushing the memory, which it calls 4D NAND, starting with 96-layer Charge Trap Flash or CTF memory. A feature of 4D NAND is the integration under layers with memory cells of a layer with peripheral circuits. SK Hynix estimates that the move to 176-layer memory has enabled 35% more memory per wafer compared to previous generation 4D NAND flash.

The read access time was reduced by 20% using the new cell array selection technology, and the data transfer rate was increased by 33% to 1,6 Gbps.

SK Hynix plans to start deliveries of the new memory in the middle of next year, starting with memory for mobile devices, in which case the increase in read speed reaches 70%, and write speed - 35%. Later, deliveries of chips for consumer and corporate SSDs will begin.

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