G. Puzzilli, F. Irrera, A. Padovani, P. Pavan, L. Larcher, A. Arya, V. della Marca, A. Pirovano
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On the RESET-SET transition in Phase Change Memories
We characterize SET operation in Phase Change Memories. A measurement procedure aiming to investigate resistance transition from amorphous to crystalline states is shown. Results give interesting insights on the crystallization process of GST material and a simple model is introduced. Crystallization process obeys to a constant energy law. Fast SET pulses require high power; slow SET pulses can be implemented in low power applications. Results may be used for an optimized design of memory cell operating conditions.