MOSFET gate

Discussion in 'Homework Help' started by vustudent, Oct 11, 2009.

  1. vustudent

    Thread Starter Active Member

    Mar 11, 2009
    38
    0
    What do you mean by a high K gate dielectric?
     
  2. steinar96

    Active Member

    Apr 18, 2009
    239
    4
    There is usually a insulating material (usually silocon dioxide between the gate and the substrate) of a mosfet transistor. Being high K means it has a high dielectric constant if i remember correctly.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    Perhaps the attached PDF will give some more info.

    Greetings,
    Bertus
     
  4. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    144
    In a roundabout way, yes.

    k is the process trandconductance parameter of dimensions A/V^2. It is the product of the surface mobility of electrons in the MOSFET channel which is a function of the doping processes, and the capacitance of the gate oxide-layer which is defined as the dielectric constant of the oxide layer over its thickness.

    Dave
     
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