A comparison study between double and single gate p-IMOS

A double gate p-IMOS (DG p-IMOS) as well as a process definition for this device is proposed. Simulation studies show that at 400 (K) this device provides smaller subthreshold slope and threshold voltage than a single gate p-IMOS (SG p- IMOS). The ON/OFF current ratio for the DG p-IMOS is larger than that of an equivalent SG p-IMOS. Moreover, the double gate device has higher transconductance than the single gate device. The DG p-IMOS structural parameters affect its electrical characteristics. Reduction of the body thickness tends to lower threshold voltage and increase ON/OFF current ratio. Furthermore, for a given spacing between source and drain threshold voltage reduces as the gate length is increased.