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A semi-empirical analytic model for threshold voltage instability in MOSFETs with high-k gate stacks

He Jin, Ma Chenyue, Zhang Lining, Zhang Jian and Zhang Xing

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Abstract: A semi-empirical analytic model for the threshold voltage instability of a MOSFET is derived from Shockley–Read–Hall (SRH) statistics to account for the transient charging effects in a MOSFET high-k gate stack. Starting from the single energy level and single trap assumption, an analytical expression for the filled trap densityin terms of dynamic time is derived from SRH statistics. The semi-empirical analytic model for the threshold voltage instability is developed based on MOSFET device physics between the threshold voltage and the induced trapdensity. The obtained model is also verified by extensive experimental data of trapping and de-trapping stress from different high-k gate configurations.

Key words: high-k gate stack

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    Received: 18 August 2015 Revised: 13 March 2009 Online: Published: 01 August 2009

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      He Jin, Ma Chenyue, Zhang Lining, Zhang Jian, Zhang Xing. A semi-empirical analytic model for threshold voltage instability in MOSFETs with high-k gate stacks[J]. Journal of Semiconductors, 2009, 30(8): 084003. doi: 10.1088/1674-4926/30/8/084003 He J, Ma C Y, Zhang L N, Zhang J, Zhang X. A semi-empirical analytic model for threshold voltage instability in MOSFETs with high-k gate stacks[J]. J. Semicond., 2009, 30(8): 084003. doi:  10.1088/1674-4926/30/8/084003.Export: BibTex EndNote
      Citation:
      He Jin, Ma Chenyue, Zhang Lining, Zhang Jian, Zhang Xing. A semi-empirical analytic model for threshold voltage instability in MOSFETs with high-k gate stacks[J]. Journal of Semiconductors, 2009, 30(8): 084003. doi: 10.1088/1674-4926/30/8/084003

      He J, Ma C Y, Zhang L N, Zhang J, Zhang X. A semi-empirical analytic model for threshold voltage instability in MOSFETs with high-k gate stacks[J]. J. Semicond., 2009, 30(8): 084003. doi:  10.1088/1674-4926/30/8/084003.
      Export: BibTex EndNote

      A semi-empirical analytic model for threshold voltage instability in MOSFETs with high-k gate stacks

      doi: 10.1088/1674-4926/30/8/084003
      • Received Date: 2015-08-18
      • Accepted Date: 2009-02-12
      • Revised Date: 2009-03-13
      • Published Date: 2009-07-31

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