The electronic properties of amorphous chalcogenide materials to be used in a phase change memory (PCM) play a critical role in limiting the read/program speed and voltage of the cell. This work presents a comprehensive experimental analysis of the recovery transient of threshold voltage V(T) after reset. It is shown that V(T) displays a fast increase in the first 30 ns after reset, followed by a slower time evolution due to drift. The recovery behavior is explained in terms of a threshold switching model for amorphous chalcogenides. Finally, the recovery of the OFF-state resistance R is studied, in order to assess the resistance window of the PCM under fast read operation.
Assessment of threshold switching dynamics in phase-change chalcogenide memories
IELMINI, DANIELE;LACAITA, ANDREA LEONARDO;MANTEGAZZA, DAVIDE;PIROVANO, AGOSTINO
2005-01-01
Abstract
The electronic properties of amorphous chalcogenide materials to be used in a phase change memory (PCM) play a critical role in limiting the read/program speed and voltage of the cell. This work presents a comprehensive experimental analysis of the recovery transient of threshold voltage V(T) after reset. It is shown that V(T) displays a fast increase in the first 30 ns after reset, followed by a slower time evolution due to drift. The recovery behavior is explained in terms of a threshold switching model for amorphous chalcogenides. Finally, the recovery of the OFF-state resistance R is studied, in order to assess the resistance window of the PCM under fast read operation.| File | Dimensione | Formato | |
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