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The electron and hole injection statistics of BE-SONOS NAND Flash is studied for the first time using a 75 nm charge-trapping NAND Flash test chip. By using the incremental step pulse programming (ISPP) method the impact of device variations are minimized and the electron number (N) fluctuation can be identified. We find that both electron and hole injection statistics well follow the Poisson statistics...
Floating gate (FG) devices using barrier-engineered (BE) tunneling dielectric have been studied both theoretically and experimentally. Through WKB modeling the tunneling efficiency of various multi-layer tunneling barriers can be well predicted. Experimental results for FG devices with oxide-nitride-oxide (ONO) U-shaped barrier are examined to validate our model. Furthermore, a large-density array...
A vertical channel SONOS memory, which is compatible with current CMOS process and has four physical storage nodes per unit area, is fabricated and electrically evaluated. Comparing with a planar device, the array cell tuning is much easier since the channel length is no longer limited by array area. After reviewing key performances including program/erase (P/E) speeds, second bit effect, program...
Gate stack etch profile-induced reliability issues are reviewed and discussed. A taper nitride profile, which blocks source/drain (S/D) implantation, induces an unwanted n- region. In other words, residual charges above the junctions can deplete the n- much easily and cut off the channel formation. This will cause poor string resistance distribution, worse endurance behavior, program and erase (P/E)...
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...
The most important core competences of school education resources allocation is the teaching activities of integrating information technology into instruction. This paper explores integrating information technology into instruction how to build an education resources allocation planning model using De Novo programming for case study. We expect building an efficient planning model of integrating information...
We are in the presence of a new and powerful technology called wireless sensor and actor networks. There are many fields where we can apply this technology to develop varied and interesting applications: high security environments, environmental monitoring,industrial monitoring, medicine, precision agriculture. This technology brings the need to develop new frameworks in order to make easier the application...
The construction of embedded biomedical applications is an under explored topic. The status quo is for practitioners to utilize a production process which possesses no specific focus; meanwhile, the marketplace requires highly demanding characteristics from these products. The principal requirement is that most of these products need to be effectively defect free. This demands that the production...
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