A 1.67Tb, 5b/Cell Flash Memory Fabricated in 192-Layer Floating Gate 3D-NAND Technology and Featuring a 23.3Gb/mm2 Bit Density

Successful deployment of multiple generations of the
$4\mathsf{b}/\mathsf{cell}$
(QLC) floating-gate 3D-NAND technology has paved the way for the industry-wide adoption of
$\mathsf{QLC} [1-4]$
. The transition to 5b/cell (PLC) will be another steppingstone to accelerating bit density growth and expanding Flash storage to wider markets, where a lower cost at a reasonable performance is the paramount requirement.