On the performance limits for si mosfet's: a theoretical study

Farzin Assad, Zhibin Ren, Dragica Vasileska, Supriyo Datta, Mark Lundstrom

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Performance limits of silicon MOSFET's are examined by a simple analytical theory augmented by selfconsistent SchrödingerPoisson simulations. The oncurrent transconductance and draintosource resistance in the ballistic limit (which corresponds to the channel length approaching zero) are examined. The ballistic transconductance in the limit that the oxide thickness approaches zero is also examined. The results show that as the channel length approaches zero (which corresponds to the ballistic limit) the oncurrent and transconductance approach finite limiting values and the channel resistance approaches a finite minimum value. The source velocity can be as high as about 1.5 x 107 cm/s. The limiting oncurrent and transconductance are considerably higher than those deduced experimentally by a previous study of MOSFET's with channel lengths greater than 0.2 pm. At the same time the transconductance to current ratio is substantially lower than that of a bipolar transistor.

Original languageEnglish (US)
Number of pages1
JournalIEEE Transactions on Electron Devices
Issue number1
StatePublished - Dec 1 2000


  • Charge carrier processes
  • Mosfet's
  • Nanotechnology
  • Semiconductor device modeling
  • Semiconductor devices

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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