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NAND flash memories are used in digital still cameras, cellular phones, MP3 players and various memory cards. As seen in the growing needs for applications such as solid-state drives and video camcoders, the market demands for larger-capacity storage has continuously increased and NAND flash memories are enabling a wide range of new applications. In such situations, to achieve larger capacity at low...
Today NAND flash memory is used for data and code storage in digital cameras, USB devices, cell phones, camcorders, and solid-state disk drives. To satisfy the market demand for lower cost per bit and higher density nonvolatile memory, in addition to technology scaling, 2 b/cell MLC technology was introduced. Recently MLC NAND flash memories with more than 2 b/cell have been reported. To meet market...
A 16 Gb 8-level NAND flash chip on 56 nm CMOS technology has been fabricated and is being reported for the first time. This is the first 3-bit per cell (X3) chip published with all-bitline (ABL) architecture, which doubles the write performance compared with conventional shielded bitline architecture. A new advanced cache program algorithm provides another 15% improvement in write performance. This...
Fabricated in 56nm CMOS technology, an 8Gb multi-level NAND Flash memory occupies 98.8mm2, with a memory cell size of 0.0075mum/b. The 10MB/s programming and 93ms block copy are also realized by introducing 8kB page, noise-cancellation circuits, external page copy and the dual VDD scheme enabling efficient use of 1MB blocks
A 146 mm/sup 2/ 8 Gb NANO flash memory with 4-level programmed cells is fabricated in a 70 nm CMOS technology. A single-sided pad architecture and extended block-addressing scheme without redundancy is adopted for die size reduction. The programming throughput is 6 MB/s and is comparable to binary flash memories.
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