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US09530512B2 Temperature dependent sensing scheme to counteract cross-temperature threshold voltage distribution widening 有权
温度依赖感测方案来抵消交叉温度阈值电压分布扩大

Temperature dependent sensing scheme to counteract cross-temperature threshold voltage distribution widening
Abstract:
Methods for reducing cross-temperature threshold voltage distribution widening by applying a temperature dependent sensing scheme during read operations are described. In some embodiments, during a read operation, the sensing conditions applied to memory cells within a memory array (e.g., the sensing time and the read voltage applied to the memory cells during the sensing time) may be set and/or adjusted based on a temperature of the memory cells during the read operation, a previous temperature of the memory cells when the memory cells were programmed, and the programmed states of neighboring memory cells. In some cases, the sensing time for sensing a memory cell of a NAND string and the source voltage applied to a source line connected to the NAND string may be set based on the temperature of the memory cells during sensing and the previous temperature of the memory cells when the memory cells were programmed.
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