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Title: Electron trap transformation under positive-bias temperature stressing
Authors: Gao, Yuan
Ang, Diing Shenp
Bersuker, G.
Young, C. D.
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2013
Source: Gao, Y., Ang, D. S., Bersuker, G., & Young, C. D. (2013). Electron Trap Transformation under Positive-Bias Temperature Stressing. IEEE Electron Device Letters, 34(3), 351-353.
Series/Report no.: IEEE electron device letters
Abstract: Electron detrapping in the TiN/HfO2 gate n-MOSFET under dynamic positive-bias temperature instability (PBTI) is examined. Similar to hole detrapping under dynamic negative-bias temperature instability (NBTI), electron detrapping per relaxation cycle is a constant under a low oxide stress field (~ 5.5 MV/cm), independent of the number of times the transistor is stressed and relaxed, and it progressively decreases with the number of stress/relaxation cycles at a higher oxide stress field (~7 MV/cm). Analysis shows that the decrease is due to a portion of the electron trap states being transformed into deeper levels, thereby increasing the emission time of the trapped electrons. However, unlike hole detrapping, the decrease in electron detrapping is not accompanied by a correlated increase in the stress-induced leakage current, and it can be reversed with a moderate negative gate voltage. These differences from NBTI suggest that distinct defects are active under PBTI.
DOI: 10.1109/LED.2013.2242041
Schools: School of Electrical and Electronic Engineering 
Rights: © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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