why it is compulsary to provide an overlap between the source and drain with gate...?

surya92 · Jul 20, 2013

why it is compulsory to provide an overlap between the source and drain with gate...?

rahdirs · Jul 20, 2013

The overlap between the gate and the source and drain region is required to ensure that the inversion layer forms a continuous conducting path between the source and drain region. Typically this overlap is made as small as possible in order to minimize its parasitic capacitance.
Gate-to-Source/ Drain overlap assures good electrostatic control of the channel, and hence, a strong ON state current ION.

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