Insight of Junctionless MOSFET: Unfold Types of MOSFETs, Necessity for Miniaturization, short Channel Effects in Scaling of Devices, Technique to Reduce Short Channel Effects, Device Modeling, Analytical Modeling of MOSFET, Parameters Involved in the Design of the Device, Performance Analysis of the Device, Channel and Gate engineering, Experimental Analysis of Dual Material Surrounding Gate Junctionless MOSFETs Using Finite Difference Method.