Effects of Lateral Charge Spreading on the Reliability of TANOS (TaN/AlO/SiN/Oxide/Si) NAND Flash Memory

Changseok Kang, Jungdal Choi, Jaesung Sim, Changhyun Lee, Yoocheol Shin, Jintaek Park, Jongsun Sel, Sanghun Jeon, Young‐Woo Park, Kinam Kim

2007 · 47 citations · 4 references

Concepts

Abstract

It was found that the charge loss behavior of TANOS (TaN-Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -nitride-oxide-silicon) cells for NAND flash memory application is highly dependent on the gate structures for the first time. The gate structures with trap layers remained on source and drain regions showed increased charge loss compared to the one with trap layers separated between different gate lines. The improvement by removing the trap layers between gate lines suggests that the lateral charge spreading via trap layers from the programmed cells to the adjacent erased cells contributes to the charge loss of the TANOS cells.

References

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