Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)



(3D TriLevel Cell) See NAND flash.

NAND flash

The type of flash memory in a solid state drive (SSD), USB drive and memory card. NAND flash is used for storage, while NOR flash supports program execution. The NAND and NOR designations actually refer to the logic circuits on the chips (for more details, see flash memory and logic gate).

2D NAND - Limitations
Traditional flash memory has a single layer of cells, known as "2D planar NAND." As manufacturers shrank the cells and cell walls to increase storage density, fewer electrons resided in each cell, and leakage would occur. In addition, storing two and three bits in a single cell made ever smaller cells increasingly problematic (see MLC).

3D NAND - The Solution
Instead of making cells smaller, starting in 2013, Samsung began stacking layers of cells on top of one another. Other manufacturers followed.

3D NAND Solid State Drives (SSDs)
In 2018, Kingston Technology announced 64-layer, triple level 3D NAND SSDs in three form factors: 2.5" SATA SSDs up to 1.9TB, mSATA SSDs up to 480GB (top) and M.2 SSDs up to 960GB (bottom). The M.2 interface supports both SATA and PCI Express. See SATA, mSATA and PCI Express.

Personal Use Only

Before/After Your Search Term
3D printing materials3D Touch
3D rendering3D transistor
3D shutter glasses3D TV
3D sound3D TV glasses
3D stereo3D types
3D Studio3D VESA port
3D summary3D video
3D surgery3D viewer
3D sync3D virtual world
3D tablet3D vision

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design