Flash memory
Flash Memory: Flash memory is a type of non-volatile memory that can be electrically erased and reprogrammed. It is commonly used in electronic devices such as computers, digital cameras, and mobile phones due to its fast read access time and resistance to mechanical shock. Flash memory is cost-effective compared to other types of memory like EEPROM and can achieve high capacities, with packages reaching up to 1 tebibyte.
Technological Advancements: Over the years, flash memory technology has evolved with the introduction of new memory card formats, die stacking technologies, and advancements in operation principles involving floating-gate transistors and multi-level cell devices. Different types of flash memory technologies like NOR and NAND have been developed, with NAND flash technology, particularly vertical NAND (V-NAND) by Samsung Electronics, leading in memory density and sales.
Writing, Erasing, and Structure: Writing and erasing in NAND flash memory is achieved through tunnel injection, and the structure of NAND flash memory is hierarchical, from cell to die level. V-NAND cells utilize a charge trap flash architecture, offering performance advantages in terms of speed, longevity, and power efficiency. The adoption of 3D NAND technology, like V-NAND, aims at reducing costs and enhancing memory capabilities.