Kioxia Researchers Devise Hepta-Level Cell NAND
Blocks&Files, March 31st, 2023
Kioxia NAND researchers say they have proven that Hepta Level Cell NAND with 7 bits per cell is a workable possibility.
After demonstrating 6-bit hexa-level cell flash in August 2021 using NAND cooled to the boiling point of liquid nitrogen (77 K or -196 degrees C) the researchers have upped their game by one more bit, inventing a cell with 128 voltage states...
Cryogenic cooling worked for 6-bit cells but more was needed for 7-bit ones. They combined the same cryogenic cooling with new silicon process technology to improve cell readability.