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Improvement of charge storage characteristics on floating gated nonvolatile memory devices with In2O3 nanoparticles embedded polyimide gate insulator

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5 Author(s)
Koo, Hyun-Mo ; Department of Electronic Materials Engineering, Kwangwoon University, 447-1 Wolgye-dong, Nowon-gu, Seoul 139-701, Korea ; Won-Ju Cho ; Lee, Dong Uk ; Kim, Seon Pil
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Nanofloating gate memory (NFGM) devices using In2O3 nanoparticles as charge storages embedded in polyimide gate insulator were fabricated. Self-assembled In2O3 nanoparticles were formed inside the polyimide matrix as a result of chemical reactions between indium ions and polymer precursors. The average diameter and the particle density were 7 nm and 6×1011 cm-2, respectively. The memory window of fabricated NFGM device due to the charging effect of In2O3 particles was larger than 4.4 V. The charge storage characteristics of NFGM devices with In2O3 nanoparticles embedded in polyimide gate insulator were significantly improved by the postannealing in a 3% diluted hydrogen in N2 ambient.

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Applied Physics Letters  (Volume:91 ,  Issue: 4 )