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  • NANOMOSFET by Pragya Kushwaha

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    Pragya Kushwaha
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    NANOMOSFET by pragya kushwaha

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    128 views6 pages

    NANOMOSFET by Pragya Kushwaha

    Uploaded by

    Pragya Kushwaha

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPTX, PDF, TXT or read online from Scribd
    Flag for inappropriate content
    of 6

    NANOMOSFET

    ShortChannelEffect
    • When channel length is of the same order of
    magnitude as the depletion layer widths.
    • Operating speed increases
    • Number of components per chip increases
    Causes

    • Limitation imposed on electron drift


    characterstics in channel
    • The modification of the Vt due to shortening
    of the channel length.
    Problems

    • Dibl
    • Surface scattering
    • Velocity saturation
    • Impact ionization
    • Hot electron effect
    Solutions

    • Mobility enhancement using strain Si.


    • Gate leakage reduction using high-k dielectric
    • Performance using metal gates
    • Advanced device structures.
    Ex: Single gate
    double gate
    Triple gate
    quadruple(GAA),
    pigate.
    Challenges

    • Theoretical assessment via simulation of


    nanodevices is a challenge because
    1)bandstructures,
    2) arbitrary wafer orientation,
    3) quantam effects and
    4)electrostatics
    all are needed to be considered simultaneously.

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