Enhancement of Program Speed in Dopant-Segregated Schottky-Barrier (DSSB) FinFET SONOS for <emphasis emphasistype="smcaps">NAND</emphasis>-Type Flash Memory

Sung-Jin Choi, Jin‐Woo Han, Sungho Kim, Moongyu Jang, Jin Soo Kim, Kwang Hee Kim, Gi Sung Lee, Jae Sub Oh, Myeong Ho Song, Yun Chang Park,

IEEE Electron Device Letters · 2008 · 21 citations · 10 references

Concepts

Abstract

A dopant-segregated (DS) Schottky-barrier (DSSB) FinFET SONOS for NAND flash memory with a proposed architecture is demonstrated for the first time. A DSSB technique with a nickel-silicided source/drain (S/D) is integrated in the FinFET with a 30-50-nm range of fin width. Compared with the conventional FinFET SONOS, the DSSB FinFET SONOS boasts very fast programming time with low voltage. For a programming state, hot electrons triggered by sharp band bending at the DS S/D region are used. As a result, a threshold voltage ( <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">V</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sub> ) shift of 4.5 V is achieved in a fast programming time of 100 ns.

References

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