Vertical MOSFETs for High Performance, Low Cost CMOS

We present a review of recent reports on vertical MOSFETs which includes a summary of our own research in this area. Such devices can offer a decananometer channel length in a relaxed lithography. Furthermore, the footprint is substantially smaller than an equivalent lateral MOSFET for a given on-current. We summarise a number of innovative device architectures that allow control of short channel effects and reduction of parasitic elements. Both numerical modelling and experimental results are presented to validate the proposals. The devices are particularly suited to radio frequency application.