Advances in MOS devices on silicon carbide (SiC) have been greatly hampered by the low inversion layer mobilities. In this paper, the electrical characteristics of lateral n-channel MOSFET's fabricated on 4H-SiC are reported for the first time, Inversion layer electron mobilities of 165 cm(2)/V.s in 4H-SiC MOSFET's were measured at room temperature. These MOSFET's were fabricated using a low temperature deposited oxide, with subsequent oxidation anneal, as the gate dielectric.