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The effect of nitride composition, i.e. Si-rich (Si+) and N-rich (N+) nitride bi-layers separated by an oxynitride (SiON) layer on memory performance and reliability is studied. Bottom Si+ layer and top N+ forms the Si+/N+ bi-layer that is compared to the opposite configuration of N+/Si+ bi-layer to reveal large impact on memory performance and reliability. Si+/N+ bi-layers exhibit superior P/E windows...
The performance and reliability of charge trap flash with single and bi-layer Si-rich and N-rich nitride as the storage node is studied. Single layer devices show lower memory window and poor cycling endurance, and the underlying physical mechanisms for these issues are explained. An engineered trap layer consisting of Si-rich and N-rich nitride interfaced by a SiON barrier layer is proposed. The...
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