An Accurate Model of Fully-Depleted Surrounding Gate Transistor (FD-SGT) (Special Issue on New Concept Device and Novel Architecture LSIs)

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概要

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• A steady-state current-voltage characteristics of fully-depleted surrounding gate transistor (FD-SGT) is analyzed. First, the new gate oxide capacitance model and the new threshold voltage model of FD-SGT are proposed. It is shown that the gate oxide capacitance per unit area increases with scaling down the silicon pillar's diameter. It is newly found that the threshold voltage decreases with scaling down the silicon pillar's diameter, because the gate oxide electric fields increase with increasing gate oxide capacitance. Next, by using the proposed models, the new current-voltage characteristics equation of FD-SGT is analytically formulated for the first time. In comparison with the results of the three-dimensional (3D) device simulator, the results of the new threshold voltage model show good agreement within 0.012V error in maximum. The results of the newly formulated current-voltage characteristics also show good agreement within 1.4% average error. The results of this work make it possible to theoretically clear the device designs of FD-SGT and show the new viewpoints for future ULSI's with SGT.

• 1997-07-25

著者

• MASUOKA Fujio

  Research Institute of Electrical Communication, Tohoku University

• Endoh T

  Tohoku Univ. Sendai‐shi Jpn

• Endoh T

  Tohoku Univ. Sendai Jpn

• Endoh Tetsuo

  Research Institute Of Electrical Communication Tohoku University

• Masuoka F

  Tohoku Univ. Sendai Jpn

• Masuoka Fujio

  Research Institute Of Electrical Communication Tohoku University

• Masuoka Fujio

  The Reserch Institute Of Electrical Communication Tohoku University

• NAKAMURA Tairiku

  Research Institute of Electrical Communication, Tohoku University

• Masuoka F

  Research Institute Of Electrical Communication Tohoku University

• NAKAMURA Tomonori

  Tohoku University

• Nakamura Tairiku

  Research Institute Of Electrical Communication Tohoku University

• Endoh T

  Research Institute Of Electrical Communication Tohoku University

• Nakamura T

  Department Of Bioengineering And Robotics Tohoku University

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