• Toshiba 64L NAND – BiCS FLASH

  • Toshiba released their 64L NAND solution (BiCS FLASH) in a SanDisk Ultra 3d SSD in 2017. TechInsights has conducted a significant amount of analysis on this product, including the following highlights:

    • Memory density reached up to 3.40 Gb/mm2, which is 40% increased from their 48L TLC
    • Memory array efficiency still kept 70% on a die
    • 64L 256 Gb die size is shrunk to 75.2 mm2 from 105.4 mm2 (48L 256 Gb die)
    • Different NAND cell layouts including 8 strings additionally with one dummy strings for every CSL
    • 19 nm BL half pitch used
    • 73 Gates stacked including selectors, active and dummy wordlines
    • Improved memory peripheral design and circuits


    Download the product brief for complete details
    on our analysis of this product


    We have made several reports available on this product, as follows:

    SanDisk/Toshiba 64-Layer 256Gb 3D NAND Flash Part 1 - ACMOS Essentials
    SanDisk/Toshiba 64-Layer 256Gb 3D NAND Flash Part 2 - ACMOS Essentials
    SanDisk/Toshiba 64-Layer 256Gb 3D NAND Circuit Analysis Report

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