Temperature effect on read current in a two-bit nitride-based trapping storage flash EEPROM cell

Mu Yi Liu; Yao Wen Chang; Nian Ki Zous; Ichen Yang; Tao Cheng Lu; Ta-Hui Wang; Wenchi Ting; Joseph Ku; Chih Yuan Lu

doi:10.1109/LED.2004.830275

Temperature effect on read current in a two-bit nitride-based trapping storage flash EEPROM cell

Mu Yi Liu^*, Yao Wen Chang, Nian Ki Zous, Ichen Yang, Tao Cheng Lu, Ta-Hui Wang, Wenchi Ting, Joseph Ku, Chih Yuan Lu

^*Corresponding author for this work

Department of Electronics Engineering

Research output: Contribution to journal › Article

9 Scopus citations

Abstract

The temperature effect on the read current of a two-bit nitride-storage Flash memory cell is investigated. In contrast to a conventional silicon-oxide-nitride-oxide (SONOS) cell with uniform Fowler-Nordheim (FN) programming, a significant high-V _T state read current increase, which results in the read window narrowing at high temperature, is observed in a channel hot electron (CHE) programmed cell. The increment of high-V _T state leakage current shows a positive correlation with program/erase threshold voltage window. Since the temperature effect is very sensitive to a locally trapped charge profile, a two-dimensional simulation with a step charge profile is employed to characterize the relationship between current increment and both charge width and charge density.

Original language	English
Pages (from-to)	495-497
Number of pages	3
Journal	IEEE Electron Device Letters
Volume	25
Issue number	7
DOIs	https://doi.org/10.1109/LED.2004.830275
State	Published - 1 Jul 2004

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Liu, M. Y., Chang, Y. W., Zous, N. K., Yang, I., Lu, T. C., Wang, T-H., Ting, W., Ku, J., & Lu, C. Y. (2004). Temperature effect on read current in a two-bit nitride-based trapping storage flash EEPROM cell. IEEE Electron Device Letters, 25(7), 495-497. https://doi.org/10.1109/LED.2004.830275

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abstract = " The temperature effect on the read current of a two-bit nitride-storage Flash memory cell is investigated. In contrast to a conventional silicon-oxide-nitride-oxide (SONOS) cell with uniform Fowler-Nordheim (FN) programming, a significant high-V T state read current increase, which results in the read window narrowing at high temperature, is observed in a channel hot electron (CHE) programmed cell. The increment of high-V T state leakage current shows a positive correlation with program/erase threshold voltage window. Since the temperature effect is very sensitive to a locally trapped charge profile, a two-dimensional simulation with a step charge profile is employed to characterize the relationship between current increment and both charge width and charge density.",

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AU - Lu, Tao Cheng

AU - Wang, Ta-Hui

AU - Ting, Wenchi

AU - Ku, Joseph

AU - Lu, Chih Yuan

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AB - The temperature effect on the read current of a two-bit nitride-storage Flash memory cell is investigated. In contrast to a conventional silicon-oxide-nitride-oxide (SONOS) cell with uniform Fowler-Nordheim (FN) programming, a significant high-V T state read current increase, which results in the read window narrowing at high temperature, is observed in a channel hot electron (CHE) programmed cell. The increment of high-V T state leakage current shows a positive correlation with program/erase threshold voltage window. Since the temperature effect is very sensitive to a locally trapped charge profile, a two-dimensional simulation with a step charge profile is employed to characterize the relationship between current increment and both charge width and charge density.

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