Process Characterization of 32nm Semi Analytical Bilayer Graphene-based MOSFET

This paper presents an inclusive study and analysis of graphene-based MOSFET device at 32nm gate length. The analysis was based on top-gated structure which utilized Hafnium Dioxide (HfO₂) dielectrics and metal gate. The same conventional process flows of a transistor were applied except the deposition of bilayer graphene as a channel. The analytical expression of the channel potential includes all relevant physics of bilayer graphene and by assuming that this device displays an ideal ohmic contact and functioned at a ballistic transport. Based on the designed transistor, the on-state current (I_ON) for both GNMOS and GPMOS shows a promising performance where the value is 982.857uA/um and 99.501uA/um respectively. The devices also possess a very small leakage current (I_OFF) of 0.289578nA/um for GNMOS and 0.130034nA/um for GPMOS as compared to the conventional SiO_2/Poly-Si and high-k metal gate transistors. However, the devices suffer an inappropriate subthreshold swing (SS) and high value of drain induced barrier lowering (DIBL).