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Multi-level-cell (MLC) is a critical technology to achieve low bit cost for phase change memory. However, resistance drift is an intrinsic material property that kills memory window and imposes formidable challenges for MLC. In this work, we report a radically different sensing concept that exploits the non-linear R-V characteristics of PCM that can easily accommodate 8 resistance levels in three...
Conventional phase change memory (PCM) stores information in amorphous/crystalline states that can be read out as HRS/LRS. In this work we report a radically different mode of storage that can concurrently and independently work with the conventional storage mode. By stressing the memory cell with current we can shift the threshold for RESET switching, and the resulting R-I curve can be used to store...
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