Abstract
A two-dimensional (2-D) analytical subthreshold model is developed for a graded channel double gate (DG) fully depleted SOI n-MOSFET incorporating a gate misalignment effect. The conformal mapping transformation (CMT) approach has been used to provide an accurate prediction of the surface potential, electric field, threshold voltage and subthreshold behavior of the device, considering the gate misalignment effect to be on both source and drain side. The model is applied to both uniformly doped (UD) and graded channel (GC) DG MOSFETs. The results of an analytical model agree well with 3-D simulated data obtained by ATLAS-3D device simulation software.
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